Boston Gear J150B Pin And Block Type J Series

Boston Gear J150B is an alloy-steel pin-and-block universal joint (Type J Series) designed to connect shafts with a 3/4-inch bore in power-transmission systems. With an overall length of 4-1/4 inches and a hub projection of 4-1/4 inches, this unit is sized for a compact, rigid drive-linkage where space is a factor. The J150B adheres to the classic pin-and-block construction used across Boston Gear’s J Series, delivering torque transfer across angular misalignment up to 30 degrees while supporting speeds up to 2000 RPM. As a steel universal joint, it is designed for durable service in general mechanical drives and is intended to be used with standard 3/4-inch bore shafts. The J150B’s combination of bore size, length, and hub projection makes it suitable for applications that require reliable, straightforward shaft coupling without sacrificing alignment or stiffness in the drive train.