Replaceable Collet Pads

Master collets and pads from Hardinge Inc. are designed to save time and money. The style-S master collet, although originally designed for multi-spindle automatic screw machines, is said to have many benefits to the CNC lathe operator.

Master collets and pads from Hardinge Inc. are designed to save time and money. The style-S master collet, although originally designed for multi-spindle automatic screw machines, is said to have many benefits to the CNC lathe operator. The collet pads can be changed quicker than a standard collet, the cost is less and the pads require less storage space. Standard pads are hardened and ground for a long life, while soft and semi-hard emergency pads are popular for boring to size on the machine for shorter runs and secondary work, the company says.

The pads can be changed without removing the master collet from the spindle, thus reducing change-over time. For example, on an eight-spindle automatic, all the pads can be changed in 15-30 minutes as compared to 2-3 hours that it would take to change the solid collets, according to the company.

The company’s dovetail anchor design holds the pad in place when the bar is closed, and it cannot be dislodged. The design eliminates sets screws or clamps that could wear or break, and there is no pressure on the clamp. There are no holes in the OD of the master collet, or on the ID of the pads, resulting in maximum bearing on the workpiece and the spindle collet seat.

Stock delivery of most popular sizes is provided, as well as quick turnaround for decimal sizes and specials. Style-S pads are available in S10, S12, S15, S16, S20, S22, S26, S30, S35, S40 and S50 sizes to fit style-S master collets used in screw machines, CNC lathes and Hardinge collet chucks. Pads are available in round, hexagon and square with smooth or serrated order holes and with special shapes.