ER25 1 Inch Collet Holder With Straight Shank OAL 3.97 Inches Hardened Alloy Steel Pro Grade Black Oxide Nut High Precision Tool Holder With Concentricity Under 0.0002 Inches New 202-1551B

ER25 1-Inch Collet Holder with Straight Shank, Precision
✔️ Collet holder, 1 in shank, hardened steel, concentricity <0.0002 in

This ER25 collet holder features a standard collet nut and a straight shank designed for rigid, accurate toolholding in CNC milling and drilling applications. With an overall length of 3.97 inches (101 mm) and a shank size of 1 inch (25.4 mm), it's built from hardened alloy steel to 54-56 Rc and finished with black oxide for durability. Precision-ground critical surfaces and threads ensure a tight fit and long life, while coolant-through capability and the included internal set screw support through-spindle cooling and secure retention.

✅ Shank size: 1 in (25.4 mm)
✅ Overall length: 3.97 in (101 mm)
✅ Collet series: ER25
✅ Nut diameter: 42 mm (1.65 in)
✅ Concentricity: <0.0002 in (0.005 mm)
✅ Material: hardened alloy steel, Rc 54-56
✅ Finish: black oxide
✅ Coolant-through capability with internal set screw
✅ TIR: 0.0001 in

💡 What is an ER25 collet holder used for in machining and tooling setups?

This handy piece keeps cutting tools centered and secure in your spindle. - ER25 collet system provides secure grip and repeatable accuracy. - Straight shank aligns tooling with spindle axis for consistent runout. - Hardened alloy steel body withstands tough cutting conditions. - Concentricity under 0.0002 in helps maintain precise tool positioning. ✝️