Externally indexing countersink pilot guide

Details Externally indexing countersink pilot guide Externally indexing countersink pilot guide

1998-10-30

1999-12-07

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

408201, 408225, B23B 5110, B23B 4900

Patent

active

05997222&

ABSTRACT:
This invention is a countersink, counterbore or spotface, external pilot guide 98 which aligns a countersink cutter's edges 170, 171 and 172 into the center of a pre-drilled hole 15. The pilot guide indexes and attaches by lock down screw 165 to the countersink cutter 18 external body hole 160, three pilot legs 100 are recessed into the countersink cutter 18's flute pockets 150 and allows the cutting edges 170, 171 and 172 to extend through the pilot countersink cut-outs 140. Button nose 110 outside diameter comes in a range of sizes dependent on the pre-drilled hole 15 size (example: Pre-drilled hole size 0.375", button nose size 0.372") this allows clearance for friction expansion. All button nose 110 outside diameter's fit the same countersink cutter 18 and all have a hole in the center which allows the flare tube shaft 14 to move freely during the countersinking operation.

REFERENCES:
patent: 2418790 (1947-04-01), Peckham, Jr.
patent: 2665597 (1954-01-01), Hill

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