5Mm I.D. X 12Mm O.D. Hydraulic Chuck Collet (Reduction Sleeve: Closed Type). Yg1 Part # 912050. Closed Type Hydraulic Chuck Reduction Sleeves (Collets) Are For Use With Coolant-Through Tools. The Use Of Reduction Sleeves Greatly Improves The Usefulness Of A Hydraulic Chuck. Use A Reduction Sleeve To Hold A Different Diameter Tool Shank And Increase Transferable Torque By Approximately 25%.

• The Reduction Sleeve Outside Diameter Must Match Your Hydraulic Chuck's Nominal Inside Diameter.
• Reduction Sleeves Are Available In 6 Different O.D.s; 1/2", 3/4", 1-1/4", 12mm, 20mm & 32mm For Clamping Tool Shanks From 1/8" To 1" & 3mm To 25mm.

This item is part of our complete offering of YG-1 Cutting Tools, trusted for high-performance CNC machining, consistent quality, and broad application coverage across milling, drilling, threading, tool holding, and indexable operations. Browse YG-1 End Mills for carbide and cobalt milling solutions, YG-1 Hole Making Tools for drills and reamers, YG-1 Threading Tools for taps and thread mills, YG-1 Tool Holders for dependable tool holding solutions, and YG-1 Indexable Tooling for productive insert-based machining. You can also visit our main YG-1 Cutting Tools page to shop the full line and compare sizes, coatings, and performance styles for your application.