Schmarje Thread Mills

Tool Fab’s thread mills are the best quality in the industry. Our thread mills are cam-ground for durability and ease of re-grinding for long life and low cost thread production.

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Thread Mill Data & Classification

Suggested Speeds and Feeds for Solid Carbide and Carbide Tipped Thread Mills

The following are starting points and assume ideal manufacturing conditions (please adjust for your circumstances):

Material	Surface Feet Per Minute (SFM)	.250-.350	0.500	0.750	1.000	2.000
Aluminum and Magnesium	800-up	.002-.004	.003-.006	.004-.008	.006-.009	.007-.010
Brass	500-600	.002-.003	.003-.005	.004-.008	.005-.009	.007-.010
Bronze	400-600	.002-.003	.003-.005	.005-.007	.005-.008	.006-.009
Hard Bronze	220-280	.001-.002	.002-.003	.004-.006	.004-.007	.005-.008
Cast Iron - Soft	200-280	.001-.002	.002-.004	.003-.005	.004-.007	.005-.008
Cast Iron - Hard	180-250	.001-.002	.002-.003	.003-.004	.004-.005	.005-.006
Steel - Soft	230-400	.002-.003	.002-.004	.005-.005	.003-.006	.004-.007
Steel - Medium	200-350	.001-.003	.001-.003	.002-.004	.003-.005	.004-.007
Steel - Hard	120-220	.001-.002	.001-.003	.002-.004	.002-.004	.002-.005
Stainless Steel	120-220	.001-.002	.001-.003	.002-.004	.002-.004	.002-.005