In industrial engineering, an MS-CI Pully stands for a Mild Steel Pulley. It is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or to transfer power between the shaft and the belt.
Because they are made from mild steel (low carbon steel), these pulleys are known for being incredibly durable, easy to weld, and cost-effective compared to stainless steel or cast iron alternatives.
A Taper-Lock Bushing (often called a Taper-Lock Pulley) is a clever mechanical locking mechanism used to secure a pulley, sprocket, or coupling onto a rotating drive shaft.
Instead of just using a simple hole and a screw—which can slip or get stuck—it uses a two-piece system that relies on friction and wedges to create a rock-solid fit.
A Taper-Lock Bushing (often spelled Taper-Lock) is the specific component that makes the Taper-Lock pulley system work. Think of it as the “adapter” that bridges the gap between a smooth metal shaft and a heavy-duty pulley or sprocket.
