Cutting bit holding apparatus

Details Cutting bit holding apparatus Cutting bit holding apparatus

E - Fixed Constructions

21

C

E21C 35/197 (2006.01)

Patent

CA 2050864

ABSTRACT OF THE DISCLOSURE A mining bit holding system is provided which includes a bit holder which attaches to the rotatable drum of a mining machine. The bit holder includes a base portion and a body portion. The body portion has an aperture therethrough to receive a coaxial sleeve. The sleeve has a bore therethrough for rotatably receiving a cutting bit. The sleeve and bit holder are constructed such that the angular position of the sleeve may be fixed relative to the common axis of the aperture in the sleeve in any one of a plurality of discrete positions. Additionally, the sleeve and bit holder are constructed such that the sleeve may be rotated with respect to the axis of the aperture the body portion to another position and then fixed in that position.

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