Suggested Shop Applications

"525"
Formulae:
 1. Surface Feet Per Minute (SFPM) = Dia. of Work x .262 x RPM
2. Feed Per Revolution = 
Feed Inches Per Minute
             RPM


Cutting Angles for Turning Tools
Nomenclature for Single Point Cutting Tools

 Material Machined

A

B

 C

D

 E
Back Rake Angle Side Rake Angle Side Cutting Edge Angle End Cutting Edge Angle Front & Side Clearance Angle
 Steel: Soft
 Steel: Medium
 Steel: Hard
 15
10
6-8 		10-12
10
6 		0-15
0-10
0-8 		8-15
8-15
8-15 		7
6
6
 Stainless Steel: Soft
 Stainless Steel: Medium
 Stainless Steel: Hard
 0-15
0-10
0		 15
10
8 		0-15
0-15
0-15 		8-15
8-15
8-15		 7
7
7
 Cast Iron
 Malleable Iron
 Cast Steel
 0
0-8
0-8 		5
8-12
8 		0-15
0-10
0-10		 8-10
8-15
8-10		 5-6
6
6
 Aluminum
 Brass
 Bronze
10-20
4
4 		12-15
4
4 		0-15
0-15
0-15 		8-10
8-10
8-10		 7-10
5-6
5-6
 

Suggested Cutting Speeds for Screw Machine Work on Stainless Steel

Type Stainless Steel

 Brinell Hardness Range

Roughing Cut

Finishing Cut

Cutting Speed Feed In/Rev. Cutting Speed Feed In/Rev.
302
303
304
150-185
150-180
150-185 		90-130
90-150
90-130 		.005-.015
.005-.015
.005-.015
 100-150
125-200
100-150 		.003-.005
.003-.005
.003-.005
309
316
321
150-185
150-185
150-185		 90-130
90-130
90-130 		.005-.015
.005-.015
.005-.015		 100-150
100-150
100-150		 .003-.005
.003-.005
.003-.005
347
403
410
150-185
200-240
250-320		 90-130
100-130
80-105		 .005-.015
.005-.015
.005-.015		 100-150
100-150
80-120		 .003-.005
.003-.005
.003-.005
416
420
430
200-240
180-235
170-230		 100-150
80-100
100-135		 .005-.015
.005-.010
.005-.015		 140-180
100-150
100-150 		.003-.005
.003-.005
.003-.005
431
440
446
250-280
200-265
175-240		 90-180
60-80
100-135 		.005-.015
.005-.010
.005-.015		 90-140
80-100
100-150 		.003-.005
.003-.005
.003-.005
Cutting Fluid: Water soluble oils are satisfactory. Non-corrosive sulphur oils are recommended.
For dry cutting reduce speed approximately 15% 

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Blackalloy Company of America • 21 Summit Avenue • Elmwood Park, NJ 07407

Tel: (201) 475-9300 • Fax: (201) 475-9304
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