Tool Holding

Secure and accurate tool holding is the critical link between the machine spindle and the cutting tool. Tool Supply Guy stocks a comprehensive tool holding catalog for CNC machining centers, lathes, and manual machines. End mill holders are available in BT40, BT50, CAT40, CAT50, HSK, and R8 shanks with various bore diameters. ER collet chucks and ER collets (ER16, ER20, ER25, ER32, ER40) provide broad diameter range with reliable gripping force. 5C collets, 5C fixtures, and expanding collet sets are stocked for lathe and grinder workholding. 16C and 3J collets cover alternative lathe spindle standards. Boring heads (2" and 3" diameter) with fine adjustment are available for precision boring operations. Tapping chucks with tension-compression float reduce tap breakage in rigid CNC tapping. Straight shank tool holders, taper adapters, and extensions provide additional setup flexibility. We specify runout, balance grade, and taper tolerance where relevant — the information you need to make a confident selection for your precision requirements.