Abstract: An endless belt valve grinder for refacing valve heads used in internal combustion engines. Grinding is done by rotating the valve face against a moving endless abrasive belt supported on a backing wheel and driven by a driving wheel. The workhead or chuck assembly for holding the valve during grinding is automatically pneumatically actuated for gripping and releasing the valve stem. Air pressure is selected and regulated and a stop is provided to adjust the gripping force on the valve stem.

Abstract: A gimbal-like device having an arbor for holding a circular saw blade mounted on an angled arm which is attached to a carrier plate which is pivotable about one axis and rotatable about another axis with the carrier mounted on a turntable for swinging the fixture about a third axis whereby the saw blade can be located at various angular positions for grinding or sharpening the teeth of the blade by a planar grinder such as a surface on a vertical grinding or sharpening wheel.

Abstract: The present invention is a grinding attachment (10) which can be utilized as either a belt grinder or a disc or wheel grinder. The attachment (10) includes a housing (14) enclosing a drive spindle (56) to which either a grinding wheel (114) or a contact wheel (62) can be mounted. If the apparatus is to be used as a disc or wheel grinder, the grinding wheel (114) is affixed. If the apparatus is to be used as a belt grinder, the contact wheel (62) is affixed. The apparatus can easily be interchangeably reconfigured between the two configurations. When in a belt grinder configuration, the attachment (10) includes means within the housing (14) for enabling the extension of the life of a grinding belt (52) by providing various idlers (70, 72, 78) about which the belt (52) can be fed in order to maximize the length of belt within the limited space provided by the housing (14).