Grinding jig for a blade tool

A grinding jig for holding a blade tool having an edge in a grinding machine, said grinding machine having a grindstone and a support bar for supporting a grinding jig, said grinding jig comprising:

• a first and a second clamp half arranged to hold between them at least a portion of a blade tool, and;
• an elongate support portion for supporting the grinding jig onto a support bar of a grinding machine, comprising:
• the elongate support portion comprises a front end abutment surface and a rear end abutment surface for abutment against a support bar of a grinding machine, wherein;
• the front and rear end abutment surfaces are spaced apart such that a portion of a support bar of a grinding machine may be received between the front and rear end abutment surfaces and such that the grinding jig may be moved back and forth relative the support bar, in direction parallel with the longitudinal center axis of the grinding jig.