The LiftMaster 15-48B32GXX Sprocket is an OEM replacement drive component engineered for select LiftMaster chain-driven operators. Marked 48B32T, it is a 32‑tooth sprocket designed to mesh with 48B roller chain, helping transmit motor torque to the output shaft in commercial and industrial applications such as rolling doors or slide gate operators that specify this chain pitch. The “3/8"B” designation indicates a 3/8‑inch bore in a B‑hub configuration. Using the correct tooth count and chain pitch preserves the intended drive ratio, smooth operation, and long-term reliability of compatible LiftMaster equipment.
This genuine LiftMaster part is intended for like‑for‑like replacement where 48B32T is called out in the model’s service manual or parts diagram. For best results, install on a properly keyed and retained shaft, align with the mating sprocket, set correct chain tension, and verify chain pitch compatibility (48B) before energizing the operator. Follow all LiftMaster safety procedures: lockout/tagout power, confirm zero motion, check fastener torque, and re‑inspect chain alignment after initial run‑in. Because specifications may vary by operator model and gearing, consult the official LiftMaster documentation for your exact unit to confirm fit and installation requirements.