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 • 1836 Lonestar Street • Unit 3 • Conway, SC 29526

Tel: (843) 347-3390 • Fax: (843) 347-3391

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