Machining recommendations for Strenx™ and Hardox®

 

Introduction

Strenx performance steel and Hardox wear plate are steel grades that can be machined with high speed steel (HSS) or cemented carbide (CC) tools. This brochure includes our suggestions for cutting data (feeds and speeds) and the selection of tools. Other factors that should be taken into account in machining operations are also discussed. The proposals have been drawn up following our own tests on tools of various makes and in consultation with leading tool manufacturers.

 

TYPICAL PROPERTIES FOR HARDOX AND STRENX

  Hardness in Brinell
(HBW)
Hardness in Rockwell
(HRC)
Tensile strength,
/ Rm (N/mm2)
Strenx 700 ~260 ~24 ~860
Strenx 900 ~300 ~29 ~935
Strenx 960 ~320 ~32 ~990
Strenx 1100 ~430 ~43 ~1340
Strenx 1300 ~500 ~49 ~1580
Hardox HiTuf ~350 ~35 ~1080
Hardox 400 ~400 ~40 ~1250
Hardox 450 ~450 ~44 ~1400
Hardox 500 ~500 ~49 ~1580
Hardox 550 ~550 ~52 ~1760
Hardox 600 ~600 ~55 ~1940
Hardox Extreme ~675 ~62

 

Drilling recommendations

HSS-DRILL

Use only HSS drills when you have unstable machine conditions. HSS drills are only suitable up to 500 Brinell. If the machine conditions are good you have several choices of solid cemented carbide drills with exchangeable heads or indexable insert drills.

 

ADVICE FOR REDUCING VIBRATIONS AND INCREASING THE LIFETIME OF THE DRILL

  • Minimize the distance to the column and between the drill tip and the workpiece
  • Don’t use longer drill than necessary
  • Always use metal supports and clamp the workpiece securely
  • Solid and firm table
  • Always use coolant
  • Coolant mix 8-10%
  • Just before the drill breaks through, disengage the feed rate for about a second, play/springback can otherwise snap the drill tip, re-engage the feed rate when the play/springback has ceased
Machining Strenx and Hardox 62
 
 
  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) ~ 18 ~ 15 ~ 7 ~ 5
Drill Ø Feed rate, fn (mm/rev) and speed (rpm)
5 0.06/1150 0.06/950 0.05/445 0.04/280
10 0.12/570 0.11/475 0.10/220 0.08/140
15 0.17/380 0.16/320 0.15/150 0.12/95
20 0.24/290 0.23/240 0.20/110 0.16/70
25 0.30/230 0.29/190 0.25/90 0.20/55
30 0.36/190 0.35/160 0.30/75 0.24/45
Machining Strenx and Hardox 10

HSS, HSS-E, HSS-Coy
Individual holes can be drilled with an ordinary HSS drill. For rational production, either a microalloyed (HSS-E) drill or a cobalt-alloyed (HSS-Co) drill is recommended.

Machining Strenx and Hardox 101

HSS-Co
Use an HSS-Co drill (8% Co) with a small helix angle and a robust core that can withstand high torques.

  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500
Vc (m/min) ~ 12 ~ 9 ~ 7 ~ 5
Drill Ø Feed rate, fn (mm/rev) and speed (rpm)
5 0.07/760 0.06/570 0.05/445 0.04/280
10 0.10/380 0.11/475 0.10/225 0.08/140
15 0.16/250 0.16/190 0.15/150 0.12/95
20 0.23/190 0.23/140 0.20/110 0.16/70
25 0.29/150 0.29/115 0.25/90 0.20/55
30 0.35/125 0.35/95 0.30/75 0.24/45

 

FORMULAS AND DEFINITIONS

Vc= π x d x n/1000 π= 3,14
vf= n x fn Vc=cutting speed (m/min)
n = Vc x1000/ π X d n=speed (rpm)
  fn=feed rate (mm/rev)
  vf=feed rate (mm/min)
  d=drill diameter

ADVICE FOR DRILLING IN THIN PLATE BELOW 8 MM

  1. Important to have good support under the plate to avoid deflection.
  2. Indexable drill is recommended, because it begins cutting at the periphery, and does not build up the high pressure a solid carbide drill would do.
  3. With a drill diameter over Ø 10 mm and a point angle of 118-140° it is very important to support the plate that is drilled. If the drill tip breaks through the bottom surface without a supporting plate to guide the tip, it may result in an oval and undersized hole (see picture).
  4. Reduce feed rate and increase cutting speed Vc, especially when using an indexable drill.
Machining Strenx and Hardox 13
Machining Strenx and Hardox 13-1
Machining solid cemented carbide drill

SOLID CEMENTED CARBIDE DRILL

For stable machine conditions and with internal coolant, this is the only type of drill suitable for drilling Hardox Extreme.

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 70-100 60-90 40-60 35-50
fn (mm/rev) min-max min-max min-max min-max
Diameter 3.0-5.0 0.03-0.06 0.03-0.06 0.03-0.05 0.03-0.05
5.01-10.0 0.06-0.12 0.06-0.12 0.05-0.11 0.05-0.10
10.01-15.0 0.12-0.18 0.12-0.18 0.11-0.16 0.10-0.15
15.01-20.0 0.18-0.25 0.18-0.24 0.16-0.22 0.15-0.19
  Hardox
HiTuf
Hardox
400
Hardox
450
Hardox
500
Hardox
550
Hardox
600
Hardox
Extreme
Vc (m/min) 60-80 50-70 40-60 35-50 30-40 25-35 18-25
fn (mm/rev) min-max min-max min-max min-max min-max min-max min-max
Diameter 3.0-5.0 0.03-0.06 0.03-0.06 0.03-0.05 0.03-0.05 0.03-0.05 0.02-0.04 0.02-0.04
5.01-10.0 0.06-0.12 0.06-0.12 0.05-0.11 0.05-0.10 0.05-0.09 0.04-0.08 0.04-0.08
10.01-15.0 0.12-0.17 0.12-0.16 0.11-0.15 0.10-0.14 0.09-0.13 0.08-0.13 0.08-0.12
15.01-20.0 0.17-0.22 0.16-0.21 0.15-0.20 0.14-0.18 0.13-0.17 0.13-0.16 0.12-0.15

  • Drilling 7x Dc, reduce the feed rate ~20%.
  • Drilling with external coolant, reduce the speed and feed rate ~ 20%.

 

INDEXABLE INSERT DRILL

For stable machine conditions and with internal coolant

Important: Use as short drill as possible. The recommendations are for 2XØ.
  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 100-150 80-140 50-90 40-70
fn (mm/rev) min-max min-max min-max min-max
Diameter 12.0-20.0 0.04-0.10 0.04-0.10 0.04-0.10 0.04-0.08
20.01-30.0 0.06-0.12 0.06-0.12 0.05-0.12 0.04-0.10
30.01-44.0 0.06-0.14 0.06-0.14 0.06-0.14 0.06-0.12
44.01-63.5 0.08-0.16 0.08-0.16 0.08-0.16 0.08-0.14
  Hardox
HiTuf
Hardox
400
Hardox
450
Hardox
500
Hardox
550
Hardox
600
Vc (m/min) 70-130 60-120 50-90 40-70 35-55 30-50
fn (mm/rev) min-max min-max min-max min-max min-max min-max
Diameter 12.0-20.0 0.04-0.10 0.04-0.10 0.04-0.10 0.04-0.08 0.04-0.08 0.04-0.06
20.01-30.0 0.06-0.12 0.06-0.12 0.06-0.12 0.04-0.10 0.04-0.10 0.04-0.08
30.01-44.0 0.06-0.14 0.06-0.14 0.06-0.14 0.06-0.12 0.06-0.12 0.06-0.10
44.01-63.5 0.08-0.16 0.08-0.16 0.08-0.16 0.08-0.14 0.08-0.14 0.06-0.12

  • The cutting data for indexable drill has been formulated in co-operation with Sandvik Coromant.
  • Not suitable for Hardox Extreme.
Machining indexable insert drill

DRILLS WITH EXCHANGEABLE DRILL HEADS

For stable machine conditions and with internal coolant

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 70-100 60-90 40-60 35-50
fn (mm/rev) min-max min-max min-max min-max
Diameter 7.5-12.0 0.08-0.13 0.08-0.13 0.07-0.11 0.06-0.10
12.01-20.0 0.13-0.22 0.13-0.22 0.11-0.15 0.10-0.14
20.01-25.0 0.22-0.28 0.22-0.27 0.15-0.20 0.14-0.18
25.01-33.0 0.28-0.37 0.27-0.36 0.20-0.28 0.18-0.24
  Hardox
HiTuf
Hardox
400
Hardox
450
Hardox
500
Hardox
550
Hardox
600
Vc (m/min) 60-80 50-70 40-60 35-50 30-40 25-35
fn (mm/rev) min-max min-max min-max min-max min-max min-max
Diameter 7.5-12.0 0.08-0.13 0.08-0.12 0.07-0.11 0.06-0.10 0.05-0.08 0.04-0.07
12.01-20.0 0.13-0.22 0.12-0.20 0.11-0.15 0.10-0.14 0.08-0.12 0.07-0.11
20.01-25.0 0.22-0.27 0.20-0.25 0.15-0.20 0.14-0.18 0.12-0.16 0.11-0.14
25.01-33.0 0.27-0.36 0.25-0.33 0.20-0.28 0.18-0.24 0.16-0.22 0.14-0.18

  • Not suitable for Hardox Extreme.
Machining drills with exchangable drill heads
Machining cutting speed recommendations chamdrill smocha unstable machines

CUTTING SPEED RECOMMENDATIONS FOR CHAMDRILL/SUMOCHAM IN UNSTABLE MACHINES

With this tool concept and with machine conditions that is not too bad, this can be a good solution for customers that have many holes to make with this type of machines. The drilling operation can be done almost 3 times faster compared to our recommendations for HSS drills.

All recommendations for the cutting data are based on the tests we have performed in our own radial drilling machine.

CHAMDRILL with exchangeable drilling heads (see more info regarding these tools in the end of this brochure).

  • If the drill centers badly in the start, the recommendation is that you center the drill manually, otherwise the drill head may break (especially with drill Ø over 15 mm).
  • 4 results from our own test.
Machining cutting speed recommendations chamdrill smocha unstable machines 2
Hx 450 Ø Vc rpm fn mm/min nr of holes Chamdrill vs HSS
16 mm 8.5 13.3 500 0.11 56 400 2.6 times faster
Hx 450 Ø Vc rpm fn mm/min nr of holes Chamdrill vs HSS
25 mm 14.2 15.8 355 0.17 60 270 2.6 times faster
Hx 450 Ø Vc rpm fn mm/min nr of holes Chamdrill vs HSS
12 mm 14.2 11.1 250 0.11 28 300 2.5 times faster
Hx 450 Ø Vc rpm fn mm/min nr of holes Chamdrill vs HSS
30 mm 25.0 9.8 125 0.17 21 107 1.9 times faster
  Hardox 400 Hardox 450 Hardox 500
Vc (m/min) 12 - 22 10 - 18 8 - 14
fn (mm/rev) min-max min-max min-max
Diameter 7.5-11.5 0.08-0.12 0.08-0.12 0.06-0.12
12.0-17.5 0.12-0.18 0.12-0.18 0.11-0.16
18.0-25.9 0.13-0.24 0.11-0.20 0.10-0.18

  • Type of tool holder we recommend and used during the test.

COUNTERSINKING AND COUNTERBORING RECOMMENDATIONS

Countersinking/boring is best performed using tools with replaceable inserts from the tool supplier Granlund. Always use a revolving pilot and use coolant. See table below for screw and article number for the tool.

Reduce the cutting data with about 30% for countersinking

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 70-100 40-80 20-50 15-45
fn (mm/rev) 0.10-0.20 0.10-0.20 0.10-0.20 0.10-0.20
Diameter Speed (rpm)
18.0-26.0 855-1770 490-1415 245-885 185-795
26.0-38.0 590-1225 335-980 170-610 125-550
38.0-47.0 475-840 270-670 135-420 100-380
47.0-60.0 370-680 210-540 105-340 80-305
Machining countersinking 1
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 30-80 25-70 20-50 15-45 12-40 10-35 5-15*
fn (mm/rev) 0.10-0.20 0.10-0.20 0.10-0.20 0.10-0.20 0.10-0.20 0.10-0.20 0.05-0.15
Diameter Speed (rpm)
18.0-26.0 365-1415 305-1240 245-885 185-795 145-710 120-620 60-265
26.0-38.0 250-980 210-855 170-610 125-550 100-490 85-430 40-185
38.0-47.0 200-670 170-585 135-420 100-380 80-335 65-295 35-125
47.0-60.0 160-540 130-475 105-340 80-305 65-270 50-240 25-105

Counterboring is not suitable for Hardox Extreme.
Machining countersinking 2
Machining countersinking screws 1

COUNTERSINKING AND COUNTERBORING TABLE FOR SCREWS

Size Article number Ø screw head
M8 0KV9-18.0 16
M10 0KV9- 20.5 / 1KV9- 20.0 20
M12 0KV9- 25.0 / 1KV9- 26.0 24
M14 1KV9- 30.0 27
M16 1KV9- 30.0 / 2KV9- 32.0 30
M20 2KV9- 38.0 36
M24 2KV9- 40.0 39
Machining countersinking screws 2
Size Article number Ø screw head
M10 0WHV- 18.0 16
M12 0WHV- 20.0 / 1WHV- 20.0 18
M14 0WHV- 23.0 / 1WHV- 23.0 21
M16 1WHV- 26.0 24
M20 1WHV- 32.0 30
M24 1WHV- 38.0 / 2WHV- 38.0 36
M30 2WHV-47.0 45
Machining whv kv9

TAPPING RECOMMENDATIONS

With correct tools and tool holders we recommend tapping up to 500 Brinell with four-flute taps that can withstand the very high torque occurring during tapping in hard materials. If diameter is not critical, the drilled hole can be 3% larger than standard (see table below). This will increase the lifetime of the tap.

  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500
Vc (m/min) 6-10 4-8 3-5 2.5-3.5
Size Speed (rpm)
M5 380-640 255-510 - -
M6 320-530 210-425 210-320 -
M8 240-400 160-320 160-240 100-140
M10 190-320 125-255 125-190 80-110
M12 160-265 105-210 105-160 65-95
M14 135-225 90-180 90-135 57-80
M16 120-200 80-160 80-120 50-70
M20 95-160 65-125 65-95 40-55
M24 80-135 55-105 50-80 30-45
M27 70-120 45-95 45-70 30-40
M30 65-105 40-85 40-65 25-35
Machininig tap for through holes Tap for through holes
  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 10-12 7-10 3-5 2.5-3.5
Size Speed (rpm)
M5 635-765 445-635 - -
M6 530-640 370-530 210-320 -
M8 400-480 280-400 160-240 100-140
M10 320-380 225-320 125-190 80-110
M12 265-320 185-265 105-160 65-95
M14 225-275 160-225 90-135 57-80
M16 200-240 140-200 80-120 50-70
M20 160-190 110-160 65-95 40-55
M24 130-160 90-135 50-80 30-45
M27 120-140 80-120 45-70 30-40
M30 105-125 75-105 40-65 25-35

  • Tapping is not suitable. We recommmend thread milling.
Machining tap for blind holes Tap for blind holes
Machining floating chuck drilling cnc Floating chuck for drilling/CNC machines. Machining soft syncro chuck cnc Soft syncro chuck for CNC machine.

Emuge Franken is one tool supplier that have the type of tool holders we recommend for tapping, see picture to the left.

Size Pitch Drill Ø min-max
M4 0.7 3.3-3.4
M5 0.8 4.2-4.3
M6 1 5.0-5.1
M8 1.25 6.8-6.9
M10 1.5 8.5-8.7
M12 1.75 10.25-10.5
M14 2 12-12.3
M16 2 14-14.3
M20 2.5 17.5-18
M24 3 21-21.5
M27 3 24-24.5
M30 3.5 26.5-27.0

 

THREAD MILLING RECOMMENDATIONS

A CNC machine is necessary for thread milling. The tool supplier can provide programming support for the CNC machines.

Machining threadmilling recommendations
  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 100-130 80-110 50-70 40-60
fz (mm/tooth) 0.03-0.06 0.03-0.06 0.02-0.05 0.02-0.05
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 70-100 60-80 50-70 40-60 35-55 30-40 25-35
fz (mm/tooth) 0.03-0.06 0.02-0.05 0.02-0.05 0.02-0.05 0.02-0.04 0.01-0.03 0.01-0.03
Machining threadmilling recommendations 2


TAPPING AND THREAD MILLING ADVICE

  • Taps for blind holes have shorter lifetime due to the smaller core diameter.
  • Before tapping, make sure that the predrilled hole is in good condition (don’t use worn out drills).
  • Always use coated taps.
  • Requires thread milling from Hardox 550 to Hardox Extreme.
  • Make the thread milling in 2 passes.
  • Make sure that the coolant mix is between 8-10%.
  • We recommend climb milling.

 

MILLING RECOMMENDATIONS

MILLING ADVICE

  • Position the cutter off-center (to the left) to achieve a thicker chip at the entry and to avoid thick chip at the exit.
  • Avoid cutting through the center line of the cutter, as this could generate vibration.
  • Always use down milling (climb milling).
  • The recommendation is that the width of the cut (ae) is 25 or 75-80% of the diameter.
  • Use rolling into cut method.
  • Dry milling is recommended if insert is used.
  • If the machine power is low use a coarse pitch cutter.
  • Always use wise or good clamping equipment.
  • The depth of cut with milling gas-cut edges should be at least 2 mm,
  • to avoid the hard surface layer of the cut edge.
Machining milling advice


Formulas & definitions

n= Vc x1000/π x d π= 3,14
Vc= π x d x n/1000 Vc=cutting speed (m/min)
vf =fz x n x zn n=speed (rpm)
fz=vf/n x zn fz= feed rate per tooth (mm/tooth)
  vf=feed rate (mm/min)
  zn=number of cutting edges
  d=tool diameter
  ap=cutting depth (mm)

 

If you enter the workpiece with the rolling into cut method the chip thickness on the exit is always zero, and it will help to give a longer tool life.

Machining milling advice 2
Machining rolling into cut method Rolling into cut method
Machining straight into the workplace Straight into the workpiece
Machining milling advice 3


INSERTS GRADES FOR MILLING

P ISO
10
ANSI
C8
10 C7  
20 C6  
30  
40 C5  
50
M 10  
20    
30    
40  
K 01 C4
10 C3  
20 C2  
30 C1  
40  
H 01 C4
10 C3  
20 C2  
30 C1


WORKPIECE MATERIAL

P ISO P= Steel
M ISO M = Stainless steel
K ISO K = Cast iron
H ISO H = Hardened steel
= Wear resistance
= Toughness
* Example insert grade 1030.

The last 2 numbers in the insert grade indicate the position of the insert in this scale, if the insert has wear or toughness resistance.

 

INSERT GEOMETRY

The macro geometry affects many parameters in the cutting process. An insert with strong cutting edge can work at higher loads, but it will also generate higher cutting forces, consume more power and generate more heat.

Machining insert geometry
Parameter L M H
Edge strength Machining insert geometry tbl
Cutting forces
Power consumption
Max chip thickness
Heat generated

  • Use inserts grade P30-50 with light cutting geometry and a coarse-pitch cutter if the machine power is low and with unstable machine conditions.

FACE MILLING RECOMMENDATION WITH A 45° SETTING ANGLE

In very stable machine conditions and with rigid set-up the insert grade P10 would be more suitable in all milling operations with inserts, especially in Hardox 600 and Extreme. Then the cutting speed can be increased by approximately 80-100%.

Recommendation for average machine conditions

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 200-250 180-220 110-150 100-140
Feed rate (fz) min-max min-max min-max min-max
Insert grade P30 0.15-0.35 0.15-0.35 0.15-0.35 0.15-0.35
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 140-180 120-160 110-150 100-140 70-90 50-70 30-50
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Insert grade P30 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.20 0.10-0.20
Machining milling recom 45angle

 

FACE MILLING RECOMMENDATION WITH ROUND INSERTS

Round inserts have strong cutting edges and are good to use when the surface has holes and cavities etc.

Recommendation for average machine conditions

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 200-250 180-220 110-150 100-140
Feed rate (fz) min-max min-max min-max min-max
Insert grade P30 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.25
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 140-180 120-160 110-150 100-140 70-90 50-70 30-50
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Insert grade P30 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.25 0.10-0.20 0.10-0.20
Machining milling recom round insert

 

SHOULDER MILLING RECOMMENDATION WITH A 90° SETTING ANGLE

Recommendation for average machine conditions

Machining milling recom 90angle Machining milling recom 90angle 2
  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 200-250 180-220 110-150 90-130
Feed rate (fz) min-max min-max min-max min-max
Insert grade P30 0.12-0.25 0.12-0.25 0.12-0.25 0.12-0.25
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 140-180 120-160 110-150 100-140 70-90 50-70 30-50
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Insert grade P30 0.12-0.25 0.12-0.25 0.12-0.25 0.12-0.25 0.10-0.25 0.10-0.20 0.10-0.20

 

HOLE MAKING WITH HIGH FEED MILLING (CIRCULAR RAMPING)

Circular ramping (also called helical interpolation, spiral interpolation, can be an alternative to drilling). It is a simultaneous movement in a circular path (X and Y) together with an axial feed (Z) with a defined pitch (P). To manage circular ramping a CNC machine is necessary.

 

Advice
  • Use compressed air to remove metal chips.
  • Always down-milling/climb milling.
  • P = pitch mm/rev.
  • Max pitch with insert size 09 is 1,2 mm.
  • Max pitch with insert size 14 is 2,0 mm.
Circular ramping
Machining hole making high feed milling
Machining coromill 210 Coromill 210

Recommendation for average machine conditions

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 200-250 180-220 110-150 100-140
Feed rate (fz) min-max min-max min-max min-max
Insert grade P30 0.15-0.35 0.15-0.35 0.15-0.35 0.15-0.35
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 140-180 120-160 110-150 90-130 70-90 50-70 35-50
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Insert size 09 0.4-2.0 0.4-2.0 0.4-2.0 0.4-2.0 0.4-2.0 0.4-2.0 0.4-2.0
Insert size 14 0.5-3.0 0.5-3.0 0.5-3.0 0.5-3.0 0.5-3.0 0.5-3.0 0.5-3.0

  • The fz and pitch/rev are recommendations for Coromill 210 from Sandvik Coromant.

 

END MILLING RECOMMENDATION FOR SOLID CEMENTED CARBIDE TOOL

Slot milling recommendation

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 95-120 85-110 70-95 45-70
Feed rate (fz) min-max min-max min-max min-max
Diameter 3.0-6.0 0.01-0.035 0.01-0.03 0.01-0.03 0.01-0.025
8.0-12.0 0.04-0.07 0.04-0.07 0.03-0.06 0.03-0.05
14.0-20.0 0.07-0.10 0.07-0.10 0.06-0.08 0.05-0,07
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 80-105 75-100 70-95 45-70 40-65 30-40 20-30
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Diameter 3.0-6.0 0.01-0.03 0.01-0.03 0.01-0.03 0.01-0.025 0.01-0.02 0.005-0.015 0.005-0.01
8.0-12.0 0.04-0.07 0.03-0.06 0.03-0.06 0.03-0.05 0.03-0.045 0.02-0.03 0.015-0.025
14.0-20.0 0.07-0.10 0.06-0.09 0.06-0.08 0.05-0.07 0.05-0.065 0.03-0.04 0.025-0.035
Machining mill reco solid cemented carbide tool Machining slot milling advice

Slot milling advice

Ap (depth of cut)
max 0.5x D

 

SHOULDER MILLING RECOMMENDATION

  Strenx 700 Strenx 900/960 Strenx 1100 Strenx 1300
Vc (m/min) 210-240 180-210 160-190 120-150
Feed rate (fz) min-max min-max min-max min-max
Diameter 3.0-6.0 0.02-0.05 0.02-0.04 0.02-0.04 0.015-0.035
8.0-12.0 0.07-0.10 0.06-0.09 0.06-0.09 0.05-0.07
14.0-20.0 0.10-0.14 0.10-0.13 0.10-0.12 0.08-0.10
  Hardox HiTuf Hardox 400 Hardox 450 Hardox 500 Hardox 550 Hardox 600 Hardox Extreme
Vc (m/min) 190-220 180-210 160-190 120-150 80-110 70-100 60-90
Feed rate (fz) min-max min-max min-max min-max min-max min-max min-max
Diameter 3.0-6.0 0.02-0.05 0.02-0.04 0.02-0.04 0.015-0.35 0.01-0.035 0.01-0.035 0.01-0.03
8.0-12.0 0.06-0.10 0.06-0.09 0.06-0.09 0.05-0.07 0.045-0.07 0.04-0.07 0.04-0.06
14.0-20.0 0.10-0.13 0.10-0.13 0.10-0.12 0.08-0.10 0.08-0.10 0.08-0.10 0.06-0.08

  • If possible, use only compressed air to remove the chip and use weldon chuck for tool over Ø 10 mm.
Machining shoulder milling

ap (use the whole
cutting lenght)

ae (radial depth of cut)
max 0.1 x D

 

TROUBLESHOUTING FOR DRILLING AND MILLING

 

DRILLING

Short lifetime of cemented carbide tool          
Short lifetime of HSS tool          
Vibrations            
Wear on the cuttiing edge/margin              
Wear on the chisel edge/drill center              
Asymmetrical holes            
Small chipping on the cutting edges            
Chip build-up in the drill flutes            
Chipping on the corner of the cutting edges            
Holes oversize/undersize              
Drilling
Choose a tougher cemented carbide grade.
Increase the coolant flow rate and clean the coolant holes of the drill.
Check that the right HSS or cemented carbide grade is used.
Check the guideline for the cutting data.
Check the toolholders and the total indicated run-out.
Improve the set-up of the workpiece /reduce long tool set-up.
Increase the cutting speed.
Reduce the cutting speed.
Increase the feed rate.
Reduce the feed rate.

 

TURNING RECOMMENDATIONS

The cutting data recommendations below are applicable for tough cemented carbide grades. These grades are necessary for operations in which impact may occur, such as when turning plate with gas-cut edges.

Inserts grade P25 / C6 P35 / C6-C7 K20 / C2
Feed rate fn (mm/rev) 0.1 - 0.4 - 0.8 0.1 - 0.4 - 0.8 0.1 - 0.3
  Cutting speed Vc (m/min)
Strenx 700 285-195-145 230-150-100 -
Strenx 900/960 130-90-70 105-65-45 -
Strenx 1100 130-90-70 105-65-45 -
Strenx 1300 - - 100-80
Hardox HiTuf 130-90-70 105-65-45 -
Hardox 400 130-90-70 105-65-45 -
Hardox 450 130-90-70 105-65-45 -
Hardox 500 - - 100-80

  • At higher feed rate, reduce the cutting speed.

FORMULAS AND DEFINITIONS

Vc= π x d x n/1000 π= 3,14
n= Vc x1000/π x d Vc=cutting speed (m/min)
vf= n x fn n=speed (rpm)
  fn=feed rate (mm/rev)
  vf=feed rate (mm/min)
  d=workpiece Ø
  ap=cutting depth (mm)
Machining turning formulas


RESULTS FROM OUR OWN TESTS

MACHINES USED DURING THE TESTS

VMC FADAL 4020 HT modell 1997

  • Spindle type ISO 40 taper
  • Through spindle coolant
  • Spindle speed max 10,000 rpm
  • Effect spindle motor 16,8 kW
  • Torque 303Nm
VMC FADAL 4020 HT modell 1997

CSEPEL RF 50 modell 1970

  • (Radialdrilling machine)
  • Spindle type morse taper 4
  • Spindle speed 45-2000
  • Effect on the spindle motor 4 kW
CSEPEL RF 50 modell 1970
* Hardox 500 Tool drill Ø Ø Vc Thread depth Total
Tapping/through holes Manigley 105/4 DUO 21.5 M24 3.4 40 mm 48
* Hardox 500 Tool Ø Vc fn Drill depth Total
Drilling/through holes HSS Co 5% X-Alcr 18 5 0.17 30 mm 33
Hardox 500 Tool Ø Vc fn drill depth Total
Drilling/through holes EF dril 10.4 40 0.1 30 mm 875
Hardox 500 Tool drill Ø Ø Vc thread depth Total
Tapping/through holes Manigley 105/4 DUO 10.4 M12 3 30 mm 161
Hardox 600 Tool Ø Vc fn drill depth Total
Drilling/through holes ChamDrill 18 30 0.1 30 mm 180
Hardox Extreme Tool Ø Vc fn drill depth Total
Drilling/through holes MPS1 (DP 1021) 12 25 0.1 25 mm 403

* Tests carried out on the drilling machine.

TOOL RECOMMENDATIONS FOR HARDOX AND STRENX

DRILLING IN HARDOX AND STRENX

 

High speed steel drill alloyed with 8% cobalt (HSS-Co 8%)
Supplier: Alpen-MayKestag, Austria
www.alpenmaykestag.com

Tool name Article nr Diameter range
HSS -E Co 8 Taper Shank Drills, WN 103 832xxxxx 8.0-40.0
 

High speed steel drill alloyed with 8% cobalt (HSS-Co 8%)
Supplier: Witec, Germany
www.witec-tools.de

Tool name Article nr Diameter range
TYPE WITEC MN 2-135 15 VAP 10.0-40.0
 

High speed steel drill alloyed with 8% cobalt (HSS-Co 8%)
Supplier: Somta, South Africa
www.somta.co.za

Tool name Article nr Diameter range
MTS Armour Piercing drill 261xxxx 10.0-50.0
High speed steel drill alloyed with cobalt

High speed steel drill alloyed with cobalt
(DRILL BIT COBALT”S”+X-ALCR DIN1897N HARDOX STUB)
Supplier: Izar, Spain
www.izartool.com

Tool name Article nr Diameter range
Ref 1054 32xxx 2.0-12.0

High speed steel drill alloyed with cobalt
(DRILL BIT COBALT”S”+X-ALCR TAPER STUB)
Supplier: Izar, Spain
www.izartool.com

Tool name Article nr Diameter range
Ref 1054 xxxxx 14,0-30,0
High speed steel drill alloyed with cobalt

High speed steel drill alloyed with 8% cobalt
(HSCo - 8%)
Supplier: Presto tools, England
www.presto-tools.co.uk

Tool name Article nr Diameter range
Armour Piercing drill (APX) 11211 xx.xx 5.0-32.0
High speed steel drill alloyed with 8% cobalt

Solid cemented carbide drill
Suplier: Emuge Franken, Germany
www.emuge.de/english

Tool name Article nr Diameter range
EF-Drill-STEEL TA203344.xxxx 2.8-16.0
Solid cemented carbide drill

Solid cemented carbide drill
Suplier: Sandvik Coromant AB, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
Cordrill R840 Delta C R840-xxxx-30-A1A 3.0-20.0
Solid cemented carbide drill

Solid cemented carbide drill
Supplier: Granlund Tool AB, Sweden
www.granlund.com

Tool name Article nr Diameter range
THUNDER / T80 T80-xx.x 10.0-30.0
Solid cemented carbide drill

Solid cemented carbide drill
Supplier: Mitsubishi, Japan
www.mitsubishicarbide.com

MPS1 (DP 1021) Article nr Diameter range
THUNDER / T80 MPS1-xxxxS 3.0-20.0
Solid cemented carbide drill
High speed steel drill alloyed with cobalt

Solid cemented carbide drill
For hardness grade 450 Brinell and below, otherwise M-geometri.
Supplier: Seco, Sweden
www.secotools.com

Tool name Article nr Diameter range
Seco Feedmax * SD203A-12,0-36-12R1 2.0-20.0
* Example for Ø 12.
High speed steel drill alloyed with cobalt

Solid cemented carbide drill
Supplier: WNT, Germany
www.wnt.com

Tool name Article nr Diameter range
WTX-UNI 11780 3.0-25.0
High speed steel drill alloyed with cobalt

Solid cemented carbide drill
Supplier: Hoffmann-Group, Germany
www.hoffmann-group.com

Tool name Article nr Diameter range
Garant 122500 122500 1,0-20.0
Drill with exchangeable drill heads

Drill with exchangeable drill heads
Drillheads grade: IDI SG IC908
Supplier: Iscar, Israel
www.iscar.com

Tool name Article nr Diameter range
Chamdrill DCM xxx-xxx-xxA-3D 7.5-25.9
Drill with exchangeable drill heads

Drill with exchangeable drill heads
Drillheads grade: ICP IC 908
Supplier: Iscar, Israel
www.iscar.com

Tool name Article nr Diameter range
SumoCham DCN xxx-xxx-xxA-3D 6.0-32.0

Drill with exchangeable drill heads
Drillheads grade: P-geometry (HB 7530)
Supplier: Hoffmann-Group, Germany
www.hoffmann-group.com

Tool name Article nr Diameter range
HiPer-Drill DCN xxx-xxx-xxA-3D 13,0-32,75
Drill with exchangeable drill heads

Drill with exchangeable drill heads
Drillheads grade: P-geometry (PM 4234)
M-geometry (MM 2234) for Hardox 600
Suplier: Sandvik Coromant AB, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
CoroDrill 870 870-xxxx-xxxx 10.0-33.0
Drill with exchangeable drill heads

Indexable insert drill
Insert grade: Center insert LM 1044
Peripheral insert LM 4044
Suplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
CoroDrill 880 880-Dxxxxxxx-xx 12.0-63.0
Indexable insert drill

Indexable insert drill
Insert grade: Center insert LM 1044
Peripheral insert LM 4044
Suplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
CoroDrill 880 880-Dxxxxxxx-xx 12.0-63.0
Indexable insert drill

Indexable insert drill
Insert grade: T250D with P1 geometry
Suplier: Seco, Sweden
www.secotools.com

Tool name Article nr Diameter range
Perfomax SD503-xx.x-xxR7 15.0-59.0
Indexable insert drill

Counterboring in Hardox and Strenx
Use counterbore with indexable inserts and the inserts grade shall always end with H
Supplier: Granlund Tool, Sweden
www.granlund.com

Tool name Article nr Diameter range
WHV counterbore XWHV-xx.x 18.0-75.0
Counterboring in Hardox and Strenx
Countersinking in Hardox and Strenx

Countersinking in Hardox and Strenx
Use countersink with indexable inserts and the inserts grade should always end with H.
Supplier: Granlund Tool, Sweden
www.granlund.com

Tool name Article nr Diameter range
KV countersink xKV9-xx.x 20.5-60.0
Tapping in Hardox and Strenx

Tapping in Hardox and Strenx
Tap for through holes
HSSE-PM tap with TiCN coating
Supplier: Manigley, Switzerland
www.manigley.ch

Tool name Article nr Diameter range
105/4 DUO 433xx M3-M30
Tap for blind holes

Tap for blind holes
HSSE-PM tap with TiCN coating
Supplier: Manigley, Switzerland
www.manigley.ch

Tool name Article nr Diameter range
131/3 DUO 433xx M3-M36
Tap for through holes

Tap for through holes
HSS-E-PM with CoolTop coating
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
CoroTap 200 E324 / E326 M3-M20
Tap for through holes

Tap for through holes
HSSE-PM with TiAlN coating
Supplier: Hoffmann-Group, Germany
www.hoffmann-group.com

Tool name Article nr Diameter range
Garant 132065 132065-Mxx M3-M16

Tap for through holes
HSSE-PM with TICN coating
Suplier: BASS, Germany
www.bass-tools.com

Tool name Article nr Diameter range
VARIANT 1/2 TIH 1088XX M2-M16
Tap for through holes

Thread milling in Hardox and Strenx
Solid carbide thread milling cutter with TiCN coating
Supplier: Emuge Franken, Germany
www.emuge.de/english

Tool name Article nr Diameter range
GF-VZ-VHM-R15-IKZ-HB GFB35106.xxxx M6-M24
Thread milling in Hardox and Strenx

Solid carbide thread milling cutter with TiCN coating
Supplier: Emuge Franken, Germany
www.emuge.de/english

Tool name Article nr Diameter range
GSF-VHM 2D IKZ-HB GF333106.xxxx M3-M16
Solid carbide thread milling cutter with TiCN coating

End milling in Hardox and Strenx
Solid carbide end milling cutter with Siron-A coating
Suplier: Seco, Sweden
www.secotools.com

Tool name Article nr Diameter range
JS 554 Siron-A JS554xxxx 3.0-25.0
End milling in Hardox and Strenx

Milling with insert in Hardox and Strenx
Face milling with Coromill 345
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
Coromill 345 345-xxxxxx-13x 40-250
Milling with insert in Hardox and Strenx
Face milling with Coromill 300

Face milling with Coromill 300
(Round inserts)
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
Coromill 300 R300-xxxxxx-xxx 10-200
Machining-Shoulder/face milling with Coromill 490

Shoulder/face milling with Coromill 490
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
Coromill 490 490-xxxxx-xxx 20-250
Holemaking with high feed milling

Holemaking with high feed milling
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr Diameter range
Coromill 210 R210-xxxxx-xxx 25-160
Insert grade in Hardox and Strenx Insert grade in Hardox and Strenx Insert grade in Hardox and Strenx

Insert grade in Hardox and Strenx
Use insert grade P1030 for average machine conditions. In very stable machines and with a rigid set-up the insert grade P1010 would be more suitable, especially over 500 Brinell.
Supplier: Sandvik Coromant, Sweden
www.sandvik.coromant.com

Tool name Article nr/insert grade Insert geometry
Coromill 210 R210-xxxxxxx-Px 1010 M
R210-xxxxxxx-Px 1030 M
Coromill 300 R300-xxxxx-Px 1010 L-M-H
R300-xxxxx-Px 1030 L-M-H
Coromill 345 345R-1305x-Px 1010 L-M-H
345R-1305x-Px 1030 L-M-H
Coromill 490 490R-xxxxxxx-Px 1010 L-M
490R-xxxxxxx-Px 1030 L-M-H

Portable magnetic drilling machines for Hardox and Strenx
Rotabroach Scorpion
With this type of portable magnetic drilling machine is it possible to drill up to Hardox 500
Supplier: Rotabroach, United Kingdom www.rotabroach.co.uk

Model nr. Type of drill Diameter range
Rotabroach Scorpion (Model CM 500) TCT cutter for Hardox (core drill) 12-100
Portable magnetic drilling machines for Hardox and Strenx

The contents of this brochure represent general suggestions. SSAB accepts no responsibility for their suitability in individual cases. The user is therefore responsible to make the necessary adaptations to the conditions in each individual case.

SSAB is a Nordic and US-based steel company. SSAB offers value added products and services developed in close cooperation with its customers to create a stronger, lighter and more sustainable world. SSAB has employees in over 50 countries. SSAB has production facilities in Sweden, Finland and the US. SSAB is listed on the Nasdaq OMX Nordic Exchange in Stockholm and has a secondary listing on the Nasdaq OMX in Helsinki.

primewire