[Product Overview]

The ER Spring Collet is the industry standard for CNC tool holding, renowned for its versatility and wide clamping range. Designed with a double-angle slot system, it collapses uniformly to securely grip cylindrical tool shanks. It is compatible with all standard ER collet chucks and is essential for machining centers, CNC lathes, and milling machines.

[Key Features & Advantages]

• Full Size Range: Available in all standard series: ER8, ER11, ER16, ER20, ER25, ER32, ER40, and ER50, covering clamping diameters from 1mm to 34mm.

• Multiple Precision Grades: We offer three accuracy levels to meet different machining requirements:

• Standard Class: Runout $\le$ 0.015mm (Ideal for general drilling/milling)

• A Class: Runout $\le$ 0.010mm (High precision)

• AA Class: Runout $\le$ 0.005mm (Ultra-precision for fine finishing)

• Premium Material: Made from high-quality alloy spring steel (65Mn or SUJ2), heat-treated and hardened to HRC 44-48 for superior elasticity and wear resistance.

• Wide Clamping Range: Each collet has a collapse range of 0.5mm to 1.0mm (depending on size), reducing the number of collets needed in your inventory.

• Surface Treatment: Precision ground and polished, with optional coating treatments available for enhanced rust protection and longevity.

[Why Partner with Pingyuan Zhenghao Machinery?]

We are not just a trader; we are a direct manufacturer located in the production hub of machine tool accessories in China.

• Massive Production Capacity: Producing over 80,000 collets per month ensures we can fulfill large bulk orders with short lead times.

• Cost Leadership: By buying directly from our factory, you eliminate middlemen and secure the most competitive prices in the market.

• Strict Quality Control: Every collet is inspected for dimension and runout using Swiss-made testing equipment before packaging.

• One-Stop Sourcing: We also manufacture matching ER Collet Chucks, Nuts, and Spanners, allowing you to source the complete assembly from one supplier.

Frequently Asked Questions (FAQ) - OEM & Orders

Q1: Do you provide OEM branding for ER Collets?

A: Yes! We are a major OEM supplier for many international tool brands. We can laser-mark your logo, part number, and size on the collet surface. We also offer customized packaging (plastic tubes or boxes with your label).

Q2: What is the difference between A class and AA class collets?

A: The main difference is the runout accuracy (T.I.R.). A Class has a runout of 0.01mm, suitable for most CNC work. AA Class has a runout of 0.005mm, designed for high-precision, high-speed machining where minimizing vibration is critical.

Q3: Can I order mixed sizes in one shipment?

A: Absolutely. You can mix different series (e.g., 500 pcs of ER32 and 200 pcs of ER16) and different bore sizes in a single order. We are very flexible to support your inventory needs.

Q4: Do you have inch (imperial) sizes available?

A: Yes, besides standard metric sizes, we manufacture full ranges of fractional inch sizes (e.g., 1/8", 1/4", 1/2") for the US and UK markets.

Ready to restock your inventory with high-quality, affordable ER collets?Our sales team is online and ready to quote you our best factory price.

[ Send Inquiry / Get a Free Quote]