Hammer drill

Details Hammer drill Hammer drill

B - Operations, Transporting

25

D

B25D 9/04 (2006.01) B25D 16/00 (2006.01) B25D 17/08 (2006.01)

Patent

CA 2390826

A hammer drill with rolling contact at the contact surfaces for transmission of axial force between a drive shaft and hammer shaft. In the case of ball bearings, point contact is obtained. In the case of roller bearings, line contact is obtained. The area of contact is thus close to zero as opposed to a relatively large area in engagement systems using toothed surfaces. Use of point or line contact reduces heat generation and reduces energy loss due to friction.

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