Zero-Max B-05 Phas-Lok coupling hub, Series B, 7/8-inch bore. Phasing-style hub for Q-D or Taper-Lock bushings, enabling precise angular adjustment of coupled shafts without disassembly. Ideal for power transmission systems requiring accurate phasing and easy installation.

The Phas-Lok Adjusting Hub is an economical, yet precise device. It provides an easy way to change the phase relationship of a drive component and the shaft. It is ideal for fine tuning timing adjustments, adjusting for chain elongation, and sprocket tooth wear. The Zero-Max Phas-Lok provides an accurate, mechanical adjustment within a 24 degree range (±12°).