The Advance 4000 is designed to mount directly to NEMA 56J motors (C-face, threaded shaft), which are readily available in 1ø and 3ø, ODP, TEFC & TENV configurations. An extension bracket and 316 S.S. extension shaft are available to enable the use of a NEMA 56C motor (C-face, keyed shaft), which are also available in explosion-proof & chemical duty configurations.