High speed grinding tool

Details High speed grinding tool High speed grinding tool

1977-08-10

1978-11-21

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

511345F, B24B 2300

Patent

active

041259688

ABSTRACT:
A portable lightweight angle grinder is disclosed having a motor housing with a handgrip and throttle lever, a rotary air motor driving a motor spindle, an elongated air-cooled tubular extension housing adjustably mounted on said motor housing, a work spindle near the end of said extension, toothed pulleys on the work spindle and the motor spindle, and an endless neoprene belt within said extension housing with teeth that mesh with the teeth of said pulleys. The unique toothed belt drive requires no lubrication, operates efficiently at speeds up to 25,000 revolutions per minute and at least twice that normally used in conventional angle grinders using gear drives, and can be maintained in service at a fraction of the cost of the prior devices.

REFERENCES:
patent: 831272 (1906-09-01), Fletcher
patent: 1990036 (1935-02-01), Kratz et al.
patent: 3251086 (1966-05-01), Springer

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