R8 Collet For Milling Machines 12mm Chuck Holder Built From 65Mn Spring Steel Hardened To 55HRC With Precise Ground Tolerance 7/16-20UNF Internal Thread Durable Tool Holder For Rock Solid Machining

R8 Milling Collet 12mm Holder in Hardened 65Mn Steel
✔️ 12mm clamp, 7/16-20UNF drawbar, 104mm length, 55HRC

This R8 collet holder is a precision tool that fits milling machine spindles and converts a spindle hole to hold 12mm tooling securely. It's commonly used in CNC milling setups for tool changes and improved rigidity.

✅ Clamping Diameter: 12mm / 0.47 inch
✅ Drawbar Thread: 7/16-20UNF
✅ Material: 65Mn Spring Steel Hardened to 55HRC
✅ Accuracy: 0.0005 inch (0.013 mm)
✅ Total Length: 104mm / 4.09 inch
✅ Top Diameter: 32.3mm / 1.27 inch
✅ Bottom Diameter: 24.1mm / 0.95 inch

💡 What is an R8 collet holder used for in milling machines?

A handy, precise accessory that helps secure tooling and adapt spindles for solid machining.

• Securely clamps 12mm tooling in R8 spindle setups
• 65Mn spring steel with 55HRC hardness for durability
• 7/16-20UNF internal thread fits standard drawbars
• Precision ground to tight tolerances for repeatable results

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