66640 Type 340-A HSS Black Oxide 118Â degree Split Point NAS 907A Jobber Length Drill Bit (12 pack) 1-7/8" Bore 2ND REDUCTION Helical 10:1 gear

2ND REDUCTION Helical 10:1 gear set fits gearbox sizes SK1SI40/50/63

Working Pressure: 200 psi

2-in-1 Couplers Accept:

When run with standard stock spur gears

66640 Type 340-A HSS Black Oxide 118Â degree Split Point NAS 907A Jobber Length Drill Bit (12 pack) 1-7/8" Bore 2ND REDUCTION Helical 10:1 gearType 340 A 118 split point is self centering for reduced thrust and easier penetration Black oxide finish for increased wear resistance and added lubricity Manufactured to NAS 907A aerospace specification General purpose geometry with 118 split point for drilling in a wide range of drilling operations and materials. Click Here for product catalog Proudly Manufactured in the U. S. A