Shop Applications

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
Material Machined	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
Type Stainless Steel	Brinell Hardness Range	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%

Subscribe