A motor for a surgical instrument , the motor comprising: a rotor comprising a shaft and a magnet ; and a stator comprising (i) a cavity in which the rotor is disposed, and (ii) a coil assembly , wherein the coil assembly comprises a plurality of phase sets, the plurality of phase sets comprise a plurality of sets of wires, each of the plurality of phase sets comprises a plurality of coils and corresponds to a respective one of the plurality of sets of wires, the coils in each of the plurality of phase sets are at respective positions about the rotor , one of the plurality of sets of wires comprises at least three wires, the plurality of sets of wires are fused together and compressed to provide a rigid structure of the coil assembly such that the stator is not supported by a support member extending within the coil assembly and does not include proximal, central and distally located support members, and the stator causes the rotor to axially rotate a surgical tool of the surgical instrument based on current received at the plurality of sets of wires; characterised in that the plurality of sets of wires are compressed a first time using a cable tie; and the plurality of sets of wires are compressed a second time using a protective layer and a press to provide the rigid structure such that the coil assembly is not supported by a support member extending within the coil assembly. a rotor comprising a shaft and a magnet ; and a stator comprising (i) a cavity in which the rotor is disposed, and (ii) a coil assembly , wherein the coil assembly comprises a plurality of phase sets, the plurality of phase sets comprise a plurality of sets of wires, each of the plurality of phase sets comprises a plurality of coils and corresponds to a respective one of the plurality of sets of wires, the coils in each of the plurality of phase sets are at respective positions about the rotor , one of the plurality of sets of wires comprises at least three wires, the plurality of sets of wires are fused together and compressed to provide a rigid structure of the coil assembly such that the stator is not supported by a support member extending within the coil assembly and does not include proximal, central and distally located support members, and the stator causes the rotor to axially rotate a surgical tool of the surgical instrument based on current received at the plurality of sets of wires; characterised in that the plurality of sets of wires are compressed a first time using a cable tie; and the plurality of sets of wires are compressed a second time using a protective layer and a press to provide the rigid structure such that the coil assembly is not supported by a support member extending within the coil assembly. the coil assembly comprises a plurality of phase sets, the plurality of phase sets comprise a plurality of sets of wires, each of the plurality of phase sets comprises a plurality of coils and corresponds to a respective one of the plurality of sets of wires, the coils in each of the plurality of phase sets are at respective positions about the rotor , one of the plurality of sets of wires comprises at least three wires, the plurality of sets of wires are fused together and compressed to provide a rigid structure of the coil assembly such that the stator is not supported by a support member extending within the coil assembly and does not include proximal, central and distally located support members, and the stator causes the rotor to axially rotate a surgical tool of the surgical instrument based on current received at the plurality of sets of wires; characterised in that the plurality of sets of wires are compressed a first time using a cable tie; and the plurality of sets of wires are compressed a second time using a protective layer and a press to provide the rigid structure such that the coil assembly is not supported by a support member extending within the coil assembly. <EOS>