Product Features Excellent for high rotating application (AL-Alloy Material has lower moment of inertia) The most optimal solution with AL Pulley (Lower surface pressure, less shape distortion) comparing to Steel A.P. Lock Adequate surface pressure for power transmission from servo motors with less quantity of fastening screws comparing to Steel body A.P. Lock series Self pressure plate function through the unique structure, without rrequiring an additional part to press bearings Designed to suit clean rooms with high corrosion rresistance feature Principles