A surgical cutting instrument (102) for cutting bone with a cutting blade (104), comprising a body (106) of the cutting instrument； and a blade coupling mechanism (116) extending from the body and configured to attach the cutting blade, the blade coupling mechanism including a first coupling member (118) having a first blade contacting surface (130), a second coupling member (120) having a second blade contacting surface (160) facing the first blade contacting surface of the first coupling member, the second coupling member defining a bore (156) through the second blade contacting surface, blade engaging protrusions (172) projecting from at least one of the first and second blade contacting surfaces, and a driving shaft (118) having a shank (126) defining an axis (127), the first coupling member being disposed on an end (142) of the shank, the shank configured to be slidably received within the bore of the second coupling member to capture the cutting blade between the first and second blade contacting surfaces.
