An assembly (100) and method for affixing a turbomachine rotor blade (20) to a rotor wheel (18) are disclosed. In an embodiment, an adaptor member (30) is provided disposed between the blade and the rotor wheel, the adaptor member including an adaptor attachment slot (32) that is complementary to the blade attachment member, and an adaptor attachment member (34) that is complementary to the rotor wheel attachment slot (28). A coverplate (40) is provided, having a coverplate attachment member (44) that is complementary to the rotor wheel attachment slot, and a hook (46) for engaging the adaptor member. When assembled, the coverplate member matingly engages with the adaptor member, and retains the blade in the adaptor member, and the assembly in the rotor wheel.
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