The latest improvements in design and manufacturing have resulted in a new generation of hydraulic production expanding arbors available for, but not limited to, the 12 mm to 100 mm diameter size range common to today’s e-drive transmission gears. ultimately guaranteeing a runout below 3 µm TIR or better, as compared to the 5 µm (or below) runout that can be expected from its mechanical equivalent. The hydraulic arbor expands into the bore to clamp, leaving zero clearance, whereas a mechanical system requires a small clearance, thus compromising accuracy. Mechanical systems also require an axial clamping element; the hydraulic system’s inherently high bore clamping forces eliminate this need. PLEASE CONTACT AT BELOW NUMBER FOR MORE DETAILS +91 9924323998 ROTARY ENGINERRING CORPORATION RECMANDRELS@GMAIL.COM INFO@ROTARYMANDRELS.COM