A blade coupling mechanism (116) for a hand-held surgical cutting instrument (102) includes a first coupling member (118) including a first blade-contacting surface (130) and a first outer perimeter sidewall (132) adjacent the first blade contacting surface. It also includes a second coupling member (120) including a second blade-contacting surface (160) facing the first blade-contacting surface of the first coupling member. The second coupling member includes- a second outer perimeter sidewall (164) adjacent the second blade contacting surface. The second blade-contacting surface and the second outer perimeter sidewall meet to define an outer edge (168). The second coupling member including a bore (156) through the second blade contacting surface. The bore and the second blade contacting surface meeting to define an inner edge (166). Blade- engaging protrusions project (172) from at least one of the first and second blade-contacting surfaces. The protrusions are spaced closer to the outer edge than the inner edge.
