Abrasive wheel for pin bore crowns

Details Abrasive wheel for pin bore crowns Abrasive wheel for pin bore crowns

1985-04-15

1986-09-16

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51181R, B24D 500

Patent

active

046114386

ABSTRACT:
An abrasive wheel for grinding a drill bit of the kind having hard metal inserts set into a head includes two circular flange portions and a circumferential profile groove between the flange portions corresponding to the end profile intended for drill bit insert. The flange portions (7, 8) and interposed profile groove (10) are included in a first abrasive wheel body (3) having a covering coating of abrasive agent such as diamond, adapted to grind hard metal. At least one other abrasive wheel body (4), is nonrotatable and concentrically connected to one flange portion (7 or 8) of the first abrasive wheel body and, at a greater radial distance from the rotary shaft of the abrasive wheel than the adjacent flange portion of the first abrasive wheel body, has a circumferential end portion (15) having a substantially round cross-sectional form and a coating (16) of an abrasive agent, e.g. boron nitride, adapted to grind the material in the drill bit head.

REFERENCES:
patent: 140626 (1873-07-01), Hinners
patent: 1089247 (1914-03-01), Menyhert et al.

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