INSIZE 4771-40 Shank Runout Tester BT40

This INSIZE shank runout tester checks the radial runout of BT40 shanks, collets and cutting tools to an accuracy of 1μm. It holds the tool between a rotating collet and a dial test indicator, letting a machinist turn the shank by hand and read any out-of-true wobble directly off the dial. INSIZE supplies a standard shank with the tester and lists a dial test indicator and a magnetic stand as optional accessories. It suits toolroom checks on facing cutters, end mills and machine collets before they go into a spindle, catching runout that would otherwise show up later as poor surface finish or premature tool wear.