• PTP CNC Toolings Private Limited

Gage Kits to Check Draw Bar Force in Spindles

PTP CNC Toolings offers Clamprite Gage Kits that provide an easy, accurate, and cost effective method of checking the drawbar force of a machine. The kit comprises the gage head, a spindle adapter, and an internal transfer screw coupling that accepts all pull studs, which are also available separately from the company. The universal gage head adapts to every size and type of spindle, including CAT, BT, ISO, HSK, and others. The selection of the kit may be made by the spindle type and maximum drawbar force for testing. Belleville springs provide the only force that holds tools in the spindle while cutting. They are often the first to wear out on a CNC machining centre. Drawbars can have over 140 Belleville springs in the stack. Just the slightest wear on each spring will have a big effect on the clamping force, causing chatter, bad finishes, reduced cutter life, and scrapped parts. Left unchecked, a tool may eventually pull out during a cut, damaging the spindle, cutter, arbor, and fixture. Machines are never the same after a crash. Problems with repeatability, bad finishes, and short cutter life can be frustrating and difficult to diagnose. Up in the spindle and out of sight, drawbars seldom get the attention they deserve. To check it requires a special tool designed just for that purpose. The Clamprite Gage simulates a tool in the spindle, and checks the drawbar in less than a minute. It has no batteries, clumsy cables, or delicate electronics. The force gauge reads directly in Kg force, so there are no conversions or calculations.