CAT collet chuck ER HP

BT 50CAPTOBT 30

Overview
Designed for high-speed milling, the ER HP collet chuck improves machining reliability through excellent run-out, consistent results, longer tool life and faster cycle times. It reduces downtime and tooling costs while delivering improved surface finishes and tight tolerances.

High-speed milling with fine balanced design
The ER HP collet chuck features a finely balanced and symmetrical design ideal for high-speed milling and 5-axis machining. This design increases performance, reduces vibration and ensures stability at high RPMs, producing smoother finishes and extended tool life.

Maximum clamping force and rigid design
High clamping forces combined with a rigid body keep tools secure during heavy-duty machining, preventing slippage and ensuring repeatable results and process security.

Effortless implementation and safety first
ER HP collet toolholders are an alternative to technologies such as Shrinkfit or Power Milling Chucks but require only a simple roller key for operation. The system is quick, safe and easy to use, streamlining changeovers without hot spots or complicated setups.

One versatile, adaptable toolholder
The ER HP collet system offers flexibility: one toolholder with a set of collets covers a wide clamping range. Options include sealed collets, coolant holes and fine balancing to tailor the setup to specific applications and reduce the need for multiple holders.

A long-lasting investment
Toolholders are manufactured from 100% recyclable steel within the EEC and packaged in fully recycled boxes, providing a sustainable and durable solution.

Working area
The ER HP performs well across materials and is suitable for both light milling on 4-5 axis machines and roughing operations thanks to low runout, fine balancing, strong gripping force and rigid body.

Technical specifications

• Capacity: ER08: Ø1-5 mm; ER11R: Ø1-7 mm; ER16R/ER16: Ø1-10 mm; ER20: Ø1-13 mm; ER25: Ø1-16 mm; ER32: Ø2-20 mm.
• Spindle interfaces: SA40/50; DIN69871AD; BT30/40/50/30TF/40TF/50TF; HSK-A32/A40/A50/A63/A100/E25/E32/E50; Seco-Capto C3/C4/C5/C6/C8; CAT-V40/50/V40 TF/50TF; straight shanks Ø10/12/16/20.
• Clamping: Through roller bearing heads mounted on handles or torque keys.
• Runout: 3 µm at 3xD (5 µm for ER08 and straight shanks; 8 µm for Graflex).
• Balancing: G2,5-25.000 rpm or ≤ 1 g.mm (Capto G6,3-20.000 rpm; Graflex is pre-balanced).
• Recommended max rpm: ER08: 60.000 rpm; ER11R: 60.000 rpm; ER16R: 60.000 rpm; ER16: 42.000 rpm; ER20: 30.000 rpm; ER25: 30.000 rpm; ER32: 25.000 rpm.
• Fine tuning the balancing of assemblies: Selected HSK ER HP collet chucks include 4 threaded holes to enable fine tuning on a suitable balancing machine.