ENGINEERING CALCULATORS

Milling

Machining Power

Cutting speed (vc) :

m/min

Diameter of cutter (D) :

Spindle speed (n) :

rpm

Number of tooth (z) :

Feed per tooth (fz) :

Table feed per min (vf) :

mm/min

Depth of cut (ap) :

Width of cut (ae) :

Specific cutting force (Kc):

Mpa Chart

Machine efficiency :

% Chart

Material removal rate (Q) :

cc/min

Power at spindle (Ps) :

Power at motor (Pm) :

Torque at spindle (Ts) :

Spindle speed

Diameter of cutter (d) :

Cutting speed (v) :

m/min

Spindle RPM (n) :

Cutting speed

Diameter of cutter (d) :

Spindle RPM (n) :

Cutting speed (v) :

m/min

Material removal rate

Depth of cut (ap) :

width of cut (ae) :

Table feed per minute (vf) :

mm/min

Material removal rate (Q) :

cc/min

Reset

Turning

Machining Power

Diameter of workpiece (D) :

Cutting speed (vc) :

m/min

Feed per revolution (f) :

mm/rev

Depth of cut (ap) :

Specific cutting force (Kc) :

Mpa Chart

Machine efficiency :

% Chart

Spindle speed (n) :

rpm

Material removal rate (Q) :

cc/min

Power at spindle (Ps) :

Power at motor (Pm) :

Torque at spindle (Ts) :

Spindle speed

Diameter of workpiece (D) :

Cutting speed (vc) :

m/min

Spindle Speed (n) :

rpm

Cutting speed

Diameter of workpiece (D) :

Spindle speed (n) :

rpm

Cutting speed (vc) :

m/min

Material removal rate

Depth of cut (ap) :

cutting speed (vc) :

m/min

Feed per revolution (f) :

mm/rev

Material removal rate (Q) :

cc/min

Reset

Drilling

Machining Power

Diameter of drill (D) :

Cutting speed (vc) :

m/min

Feed per revolution (f) :

mm/rev

Feed per minute (vf) :

mm/min

Specific cutting force (Kc) :

Mpa Chart

Machine efficiency :

% Chart

Spindle Speed (n) :

rpm

Material removal rate (Q) :

cc/min

Power at spindle (Ps) :

Power at motor (Pm) :

Torque at spindle (Ts) :

Feed force (Thrust) (Ff) :

Spindle speed

Diameter of drill (D) :

Cutting speed (vc) :

m/min

Spindle Speed (n) :

rpm

Cutting speed

Diameter of drill (D) :

Spindle speed (n) :

rpm

Cutting speed (vc) :

m/min

Material removal rate

Diameter of drill (D) :

Cutting speed (vc) :

m/min

Feed per revolution (f) :

mm/rev

Spindle Speed (n) :

rpm

Feed per minute (vf) :

mm/min

Material removal rate (Q) :

cc/min

Reset

Tapping

Machining Power

Thread diameter (D) :

Cutting speed (vc) :

m/min

Spindle speed (n) :

rpm

Thread pitch (p) :

Material factor (K) :

Chart

Machine efficiency :

% Chart

Thread engagement (%) :

Chart

Power at spindle (Ps) :

Power at motor (Pm) :

Torque at spindle (Ts) :

Reset

Hardness Conversions

Conversion table

Material Overview


Steel and cast steel		Hardness HB
Carbon steel	< 0.25% C annealed > / = 0.25% C annealed < 0.55% C heat-treated > / = 0.55% C annealed heat-treated	125 190 250 220 300
Low alloy steel	annealed heat-treated heat-treated heat-treated	200 275 300 350
High alloy steel	annealed heat-treated	200 375

M
Stainless steel and cast steel		Hardness HB
Stainless steel	ferrit/mart martensitic austenitic	200 240 180

Stainless steel and cast steel

Hardness HB

Stainless steel

ferrit/mart

martensitic

austenitic

200

240

180


Cast iron		Hardness HB
Grey cast iron	ferrit./pearl pearlitic	180 260
Nodular cast iron	ferritic pearlitic	160 250
Malleable cast iron	ferritic pearlitic	130 230

N
Non-ferrous metals		Hardness HB
Cast aluminium alloys	< / = 12% Si age-hardened > 12% Si	75 90 130
Copper alloys	red brass, brass bronze	90 100

Non-ferrous metals

Hardness HB

Cast aluminium alloys

< / = 12% Si

age-hardened

> 12% Si

130

Copper alloys

red brass, brass

bronze

100


High-temperature alloys		Hardness HB
Fe-base alloys	age-hardened	280
Ni-or Co- base alloys	annealed age-hardened	250 350
Titanium alloys	age-hardened	RM1050

Symbol and Grade	Diameter limit (in mm)
	Over 1	3	6	10	18	30	50	80	120	180	250	315	400
	Upto 3	6	10	18	30	50	80	120	180	250	315	400	500

Basic hole

+11

+13

+16

+19

+22

+25

+29

+32

+36

+40

+10

+12

+15

+18

+21

+25

+30

+35

+40

+46

+52

+57

+63

+14

+18

+22

+27

+33

+39

+46

+54

+63

+72

+81

+89

+97

+25

+30

+36

+43

+52

+62

+74

+87

+100

+115

+130

+140

+155

H11

+60

+75

+90

+110

+130

+160

+190

+220

+250

+290

+320

+360

+400

Shafts

Running fit	With large min. clearance
	With medium min. clearance
	With small medium clearance
	With smallest minimum clearance

d11

-20

-30

-40

-50

-65

-80

-100

-120

-145

-170

-190

-210

-230

-80

-105

-130

-160

-195

-240

-290

-340

-395

-460

-510

-570

-630

-14

-20

-25

-32

-40

-50

-60

-72

-85

-100

-110

-125

-135

-24

-32

-40

-50

-61

-75

-90

-107

-125

-146

-162

-182

-198

-14

-20

-25

-32

-40

-50

-60

-72

-85

-100

-110

-125

-135

-28

-38

-47

-59

-73

-89

-106

-126

-148

-172

-191

-214

-232

-6

-10

-13

-16

-20

-25

-30

-36

-43

-50

-56

-62

-68

-16

-22

-28

-34

-41

-50

-60

-71

-83

-96

-108

-119

-131

-6

-10

-13

-16

-20

-25

-30

-36

-43

-50

-56

-62

-68

-20

-28

-35

-43

-53

-64

-76

-90

-106

-122

-137

-151

-165

-2

-4

-5

-6

-7

-9

-10

-12

-14

-15

-17

-18

-20

-6

-9

-11

-14

-16

-20

-23

-27

-32

-35

-40

-43

-47

-2

-4

-5

-6

-7

-9

-10

-12

-14

-15

-17

-18

-20

-8

-12

-14

-17

-20

-25

-29

-34

-39

-44

-49

-54

-60

Transition fit	Slide fit
	Push fit
	Wring fit	Secure against turning
	Tight fit	Secure against turning

-4

-5

-6

-8

-9

-11

-13

-15

-18

-20

-23

-25

-27

-6

-8

-9

-11

-13

-16

-19

-22

-25

-29

-32

-36

-40

-14

-18

-22

-27

-33

-39

-46

-54

-63

-72

-81

-89

-97

-25

-30

-36

-43

-52

-62

-74

-87

-100

-115

-130

-140

-155

h11

-60

-75

-90

-110

-130

-160

-190

-220

-250

-290

-320

-360

-400

-2

-3

-4

-5

-7

-9

-11

-13

-16

-18

-20

+11

+12

+13

+14

+16

+18

+20

-2

-3

-4

-5

-7

-9

-11

-13

-16

-18

-20

+11

+13

+15

+18

+21

+24

+27

+29

+32

+10

+12

+15

+18

+21

+25

+28

+33

+36

+40

+45

+12

+15

+17

+20

+24

+28

+33

+37

+43

+46

+50

+11

+13

+15

+17

+20

+21

+23

+12

+15

+18

+21

+25

+30

+35

+40

+46

+52

+57

+63

+11

+13

+15

+17

+20

+21

+23

+13

+16

+20

+24

+28

+33

+38

+45

+51

+57

+62

+67

+10

+12

+15

+17

+20

+23

+27

+31

+34

+37

+40

+10

+16

+19

+23

+28

+33

+39

+45

+52

+60

+66

+73

+80

+10

+12

+15

+17

+20

+23

+27

+31

+34

+37

+40

Interference fit

+12

+20

+24

+29

+35

+42

+51

+59

+68

+79

+88

+98

+108

+12

+15

+18

+22

+26

+32

+37

+43

+50

+56

+62

+68

+16

+23

+28

+34

+41

+50

+10

+15

+19

+23

+28

+34

+20

+27

+32

+39

+48

+59

+14

+19

+23

+28

+35

+43

Recommended limits and fits for typical applications

Width of T nuts

a13

-270

-280

-290

-300

-410

-450

-500

-560

-630

-6

-10

-13

-16

-20

-25

-30

-36

-43

-50

-56

-62

-68

-12

-18

-22

-27

-33

-41

-49

-58

-68

-79

-88

-98

-108

Socket head dia.

h12

-100

-120

-150

-180

-210

-250

-300

-350

-400

-460

-520

-570

-630

Socket head height

h13

-140

-180

-220

-270

-330

-390

-460

-540

-630

-720

-810

-890

-970

Hydraulic Fittings

A11

+330

+345

+370

+400

+430

+270

270

+280

+290

+300

B11

+200

+215

+240

+260

+290

+140

+150

+160

Key- way width in spacer rings

C11

+120

+145

+170

+205

+240

+60

+70

+80

+95

+110

Width of internal splines

+45

+60

+76

+93

+117

+142

+174

+207

+245

+285

+320

+350

+385

+20

+30

+40

+50

+65

+80

+100

+120

+145

+170

+190

+210

+230

Hexagonal socket width

D12

+120

+150

+190

+230

+275

+330

+400

+470

+545

+630

+710

+780

+860

+20

+30

+40

+50

+65

+80

100

+120

+145

+170

+190

+210

+230

Circlips

H10

+40

+48

+58

+70

+84

+100

+120

+140

+160

+185

+210

+230

250

Counter bore diameter

H12

+100

+120

+150

+180

+210

+250

+300

+350

+400

+460

+520

+570

+630

Major dia. of internal splines

H13

+140

+180

+220

+270

+330

+390

+460

+540

+630

+720

+810

+890

+970

Key-way width

J_s9

+12.5

+15

+18

+21.5

+26

+31

+37

+43.5

+50

+57.5

+65

+70

+77.5

-12.5

-15

-18

-21.5

-26

-31

-37

-43.5

-50

-57.5

-65

-70

-77.5

Symmetrical tolerances in slots

j_s14

+125

+150

+180

+215

+260

+310

+370

+435

+500

+575

+650

+700

+775

-125

-150

-180

-215

-260

-310

-370

-435

-500

-575

-650

-700

-775

j_s16

+300

+375

+450

+550

+650

+800

+950

+1100

+1250

+1450

+1600

+1800

+2000

-300

-375

-450

-550

-650

-800

-950

-1100

-1250

-1450

-1600

-1800

-2000

* Values indicated are in Micron

Surface Finish in Machining

Surface symbol

∼

Roughness grade

∼

N12

N11

N10

Ra (in microns)

∼

12.5

6.3

3.2

1.6

0.8

0.4

0.2

0.1

0.05

0.025

0.012

Planning, shaping

Drilling

Milling

Broaching

Reaming

Boring, turning

Roller burnishing

Grinding

Honing

Lapping

Average application

Less frequent application

Kc value chart for milling
Work material	Tensile Strength (Mpa) and Hardness	Specific Cutting Force Kc (Mpa)
Work material	Tensile Strength (Mpa) and Hardness	0.1mm/tooth	0.2mm/tooth	0.3mm/tooth	0.4mm/tooth	0.6mm/tooth
Mild Steel	520	2200	1950	1820	1700	1580
Medium Steel	620	1980	1800	1730	1600	1570
Hard Steel	720	2520	2200	2040	1850	1740
Tool Steel	670	1980	1800	1730	1700	1600
Chrome Manganese Steel	770	2030	1800	1750	1700	1580
Chrome Manganese Steel	770	2300	2000	1880	1750	1660
Chrome Molybdenum Steel	630	2750	2300	2060	1800	1780
Chrome Molybdenum Steel	730	2540	2250	2140	2000	1800
Nickel Chrome Molybdenum Steel	600	2180	2000	1860	1800	1670
Nickel Chrome Molybdenum Steel	940	2000	1800	1680	1600	1500
Austenitic Stainless Steel	352HB	2100	1900	1760	1700	1530
Cast Iron	155HB	2030	1970	1900	1770	1710
Hard Cast Iron	520	2800	2500	2320	2200	2040
Meehanite Cast Iron	46HRC	3000	2700	2500	2400	2200
Gray Cast Iron	360	2180	2000	1750	1600	1470
Brass	200HB	1750	1400	1240	1050	970
Light Alloy (AI-Mg)	500	1150	950	800	700	630
Light Alloy (AI-Si)	160	580	480	400	350	320
Light Alloy (AI-Zn-Mg-Cu)	200	700	600	490	450	390
	570	880	840	840	810	720

Machine efficiency
Direct belt drive	90	%
Back gear drive	75	%
Geared head drive	70 to 80	%
Oil - Hydraulic drive	60 to 90	%

Kc value chart for turning & drilling
Work material	Tensile Strength (Mpa) and Hardness	Specific Cutting Force Kc (Mpa)
Work material	Tensile Strength (Mpa) and Hardness	0.1mm/tooth	0.2mm/tooth	0.3mm/tooth	0.4mm/tooth	0.6mm/tooth
Mild Steel	520	3610	3100	2720	2500	2280
Medium Steel	620	3080	2700	2570	2450	2300
Hard Steel	720	4050	3600	3250	2950	2640
Tool Steel	670	3040	2800	2630	2500	2400
Tool Steel	770	3150	2850	2620	2450	2340
Chrome Manganese Steel	770	3830	3250	2900	2650	2400
Chrome Manganese Steel	630	4510	3900	3240	2900	2630
Chrome Molybdenum Steel	730	4500	3900	3400	3150	2850
Chrome Molybdenum Steel	600	3610	3200	2880	2700	2500
Nickel Chrome Molybdenum Steel	900	3070	2650	2350	2200	1980
Nickel Chrome Molybdenum Steel	352HB	3310	2900	2580	2400	2200
Hard Cast Iron	46HRC	3190	2800	2600	2450	2270
Meehanite Cast Iron	360	2300	1930	1730	1600	1450
Gray Cast Iron	200HB	2110	1800	1600	1400	1330

Machine efficiency
Direct belt drive	90	%
Back gear drive	75	%
Geared head drive	70 to 80	%
Oil - Hydraulic drive	60 to 90	%

Kc value chart for turning & drilling
Work material	Tensile Strength (Mpa) and Hardness	Specific Cutting Force Kc (Mpa)
Work material	Tensile Strength (Mpa) and Hardness	0.1mm/tooth	0.2mm/tooth	0.3mm/tooth	0.4mm/tooth	0.6mm/tooth
Mild Steel	520	3610	3100	2720	2500	2280
Medium Steel	620	3080	2700	2570	2450	2300
Hard Steel	720	4050	3600	3250	2950	2640
Tool Steel	670	3040	2800	2630	2500	2400
Tool Steel	770	3150	2850	2620	2450	2340
Chrome Manganese Steel	770	3830	3250	2900	2650	2400
Chrome Manganese Steel	630	4510	3900	3240	2900	2630
Chrome Molybdenum Steel	730	4500	3900	3400	3150	2850
Chrome Molybdenum Steel	600	3610	3200	2880	2700	2500
Nickel Chrome Molybdenum Steel	900	3070	2650	2350	2200	1980
Nickel Chrome Molybdenum Steel	352HB	3310	2900	2580	2400	2200
Hard Cast Iron	46HRC	3190	2800	2600	2450	2270
Meehanite Cast Iron	360	2300	1930	1730	1600	1450
Gray Cast Iron	200HB	2110	1800	1600	1400	1330

PRODUCTS

Special Purpose Machines

Micro Gundrilling Machines (MG Series)

Flex OH Series - Crankshaft Oil Hole Drilling Machine

VU Series – Multi-tasking Turn-mill Centers

Hobgrind - HG200

AUTOMOTIVE

FARM EQUIPMENT

CONSTRUCTION EQUIPMENT

RAILWAYS

ENERGY

General Engineering

TOOLS

ENGINEERING CALCULATORS

Milling

Machining Power

Spindle speed

Cutting speed

Material removal rate

Turning

Machining Power

Spindle speed

Cutting speed

Material removal rate

Drilling

Machining Power

Spindle speed

Cutting speed

Material removal rate

Tapping

Machining Power

Hardness Conversions

Conversion table

Material Overview

Surface Finish in Machining

STAY CONNECTED FOR LATEST UPDATES

SALES

SERVICE

IVRS Service

Privacy Policy

MATERIAL FACTORS K, FOR DRILLING , REAMING & TAPPING
WORK MATERIAL	HARDRESS HB	UTS kgf/mm2	MATERIAL FACTOR K
WORK MATERIAL	HARDRESS HB	UTS kgf/mm2	MATERIAL FACTOR K
FREE MACHINING STEELS	167	59.9	1.03
FREE MACHINING STEELS	183	63.0	1.42
MILD STEELS	121	44.1	1.07
MILD STEELS	160	56.7	1.22
MEDIUM CARBON STEELS	152	55.1	1.15
MEDIUM CARBON STEELS	197	67.7	1.45
ALLOY STEELS TOOL STEELS	163	58.3	1.56
	174	61.4	2.02
	229	78.8	2.10
	241	81.9	2.32
STAINLESS STEELS	187	64.6	1.56
STAINLESS STEELS	269	92.6	2.41
CAST IRON: GREY, DUCTILE, MALLEABLE	177	21.3	1.00
	198	28.4	1.50
	224	35.1	2.03
ALUMINIUM ALLOYS	-	-	0.55
COPPER ALLOYS	-	-	0.55
MAGNESIUM ALLOYS	-	-	0.45

% of engagement	factor
60	0.231
75	0.326
90	0.433
	2.72

Tensile strength (kgf/mm2)		Convert
Brinell (BHN)		Convert
Vickers (HV)		Convert
Rockwell B		Convert
Rockwell C		Convert
	Reset

Speed	Mtrs/min	Feet/min
Feed	mm/rev	inch/rev
Length	mm	inch
Length	mtr	feet
Power	kW	HP
Torque	Kgm	ft-lbs
MRR	cc/min	Cu inch/min
Weight	Kg	lbs

PRODUCTS

ENGINEERING CALCULATORS

Milling

Machining Power

Kc value chart for milling

Machine efficiency

Spindle speed

Cutting speed

Material removal rate

Turning

Machining Power

Kc value chart for turning & drilling

Machine efficiency

Spindle speed

Cutting speed

Material removal rate

Drilling

Machining Power

Kc value chart for turning & drilling

Machine efficiency

Spindle speed

Cutting speed

Material removal rate

Tapping

Machining Power

Material factors

Machine efficiency

Thread engagement

Hardness Conversions

Conversion table

Material Overview

Surface Finish in Machining

STAY CONNECTED FOR LATEST UPDATES

SALES

SERVICE

IVRS Service