05030 Type 190 HSS Black Oxide Jobber Length 135Â degree Split Point Drill Bit (12 pack) High Flow All Boston Gear change gears

All Boston Gear change gears are manufactured with a double key to accept the compound steel bushings that connect two gears together

Steel Valve

These assemblies eliminate the need to install an additional elbow fitting

Note: This is the spec sheet for the version with cast iron housing and mild steel bearing insert

Click here for spec sheet: SBLF Spec Sheet

05030 Type 190 HSS Black Oxide Jobber Length 135Â degree Split Point Drill Bit (12 pack) High Flow All Boston Gear change gearsHeavy duty construction for drilling in tougher materials Manufactured from premium high speed steel 135 split point is self centering for reduce thrust and easier penetration Manufactured to NAS 907 B aerospace specification Click Here for product catalog Black oxide surface finish increases wear resistance and adds lubricity to improve chip flow. Proudly Manufactured in the U. S. A