R8 Round Collet Three Sixteenth Inch, 7/16-20 UNF Thread Mill Chuck Holder, 0.015mm Precision Spring Collet For CNC Engraving, Milling Lathe Tool, 4.7mm Clamping Diameter, Silver Workhorse

R8 Round Collet Mill Chuck Holder with 0.015 mm Precision
✔️ 4.7 mm clamping, 104 mm total length, 32 mm OD, 0.015 mm accuracy

This high-precision R8 round collet holder clamps end mills, drills, engraving bits, and other rotary tools in CNC lathes and milling machines. It's commonly used on CNC engraving machines and lathes for precise tool holding and minimal runout.

✅ Clamping diameter: 4.7 mm / 3/16"
✅ Tail thread: 7/16-20UNF
✅ Total length: 104 mm / 4.09 in
✅ Maximum outer diameter: 32 mm / 1.26 in
✅ Accuracy: 0.015 mm
✅ Material: 45# carbon steel
✅ Hardness: HRC40-50
✅ Packing: 1 Pcs x Mill Chuck Holder

💡 What is a handy long-tail question buyers ask about R8 round collets for CNC engraving and milling? This helps them choose the right tool.
- How does 0.015 mm accuracy affect precision in engraving and milling?
- Why is a 7/16-20 UNF thread important for quick tool changes?
- What tasks benefit most from a 4.7 mm clamping diameter?

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