36990 Type 190-P 135Â degree Split Point Black Oxide HSS Parabolic Flute Drill Bit (6 pack) Q Boston Air Motors can be

Boston Air Motors can be stalled or overloaded for long periods of time without damage

Allows you room to re-bore the ID without damaging the clamp screws

• Protects and isolates motor shaft and reducer shaft bearings

worms and worm gears operating together must have the same diametrical pitch and threads

36990 Type 190-P 135Â degree Split Point Black Oxide HSS Parabolic Flute Drill Bit (6 pack) Q Boston Air Motors can beParabolic flute drills are designed to allow deep hole drilling without frequent drill removal to clear chips. Parabolic flute drills preform best in low to medium tensile strength materials. Click Here for product catalog Proudly Manufactured in the U. S. A