ER11A 70 CNC Tool Holder With 0.005mm Precision, Rock-Solid Shank Milling Arbor For High Accuracy Machining, 20CrMnTi Steel, Durable Lathe Tooling, Wrench Included, Great Concentricity For Centering Precision

BT40-ER11A-70 CNC Tool Holder with 0.005mm Precision
✔️ Includes 1 holder, 1 wrench, storage box; clamp 1 to 7 mm, 10000 rpm

The BT40-ER11A-70 CNC tool holder is a high-precision milling arbor designed for center-aligned toolholding on CNC machines. Made from 20CrMnTi steel with carburizing and quenching, it delivers strong wear resistance for demanding machining environments. It's ideal for center alignment and rigid, stable performance in common milling setups.

✅ Clamping range: 1-7 mm
✅ Precision: 0.005 mm accuracy
✅ Material: 20CrMnTi steel, hardness >HRC56°
✅ ER11 chuck provides secure tool holding up to 10000 rpm
✅ Ground inner hole and integrally formed design for high concentricity

💡 What is a high-precision CNC tool holder used for achieving tight concentricity in milling? Here's a handy breakdown.
- Improves runout control for cleaner, more accurate cuts
- Supports high-speed spindle operation with stable toolholding
- Compatible with ER11 collets and small-diameter tooling
- Durable construction resists wear in demanding machining

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