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Boston Gear’s stem pinions feature small numbers of teeth that are cut integral to the steel shaft
Click here for spec sheet: SAF Spec Sheet
078" 120 psi 28" Hg 2 15/16" PR38 3/8" 9/16"
With no heat build-up
27150 Type 150-M Metric Jobber Length 135Â degree Split Point M42 Cobalt NAS 907J Drill Bit (10 pack) Gear Racks Boston Gear’s stem pinions featureManufactured from M42 HSS containing 8% cobalt which increases high hot hardness. Cobalt drills require rigidly held positive feed drilling equipment. Manufactured to NAS 907J specifications. Click Here for product catalog Proudly Manufactured in the U. S. A
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