Wholesale High Precision R8 Shank Er Collet Chuck Cnc Milling R8 Mill Chuck for Cnc Machine
Our High Precision R8 Shank ER Collet Chuck is engineered for superior accuracy, stability, and durability in CNC milling applications. Designed for machines using an R8 spindle system, this chuck offers excellent concentricity and reliable clamping performance for a wide range of cutting tools.
Made from high-quality alloy steel with precision grinding, it ensures vibration-free machining and longer tool life—ideal for milling, drilling, tapping, and general machining operations.
Precision-ground R8 shank and collet seat achieve ≤0.01mm runout, delivering exceptional accuracy and smooth machining performance.
Made from hardened and heat-treated chromium alloy steel for high rigidity, wear resistance, and long service life.
Supports ER collet series including:
- ER16
- ER20
- ER25
- ER32
- ER40
Accommodates a wide variety of tool diameters for flexible operations.
High-precision collet nut ensures strong clamping force, reducing tool slippage and improving processing stability.
Perfect for R8 spindle mills such as Bridgeport-type milling machines.
Custom lengths, engraving, packaging, and surface treatments are available for distributors and tool brands.
- Milling
- Drilling
- Tapping
- Engraving
- General high-precision machining
- Carbon Steel
- Alloy Steel
- Stainless Steel
- Aluminum
- Copper & Brass
- Engineering Plastics
- Composite materials
| Item | Specification |
|---|---|
| Shank Type | R8 |
| Collet Type | ER16 / ER20 / ER25 / ER32 / ER40 |
| Material | High-strength chromium alloy steel |
| Hardness | HRC 55–60 |
| Runout | ≤0.01mm |
| Surface Treatment | Black oxide / Nickel plating / Custom |
| Length | Standard or OEM |
| Packaging | Plastic box / OEM packaging |
- Excellent concentricity for high-accuracy machining
- Strong clamping force, high vibration resistance
- Durable body with precision ground surfaces
- Supports a wide range of tool sizes
- Cost-effective solution for milling shops and distributors
- CNC machining centers
- Mold and die industry
- Automotive and aerospace parts machining
- General manufacturing
- Tooling workshops
- 15+ years experience in CNC tool holder manufacturing
- Strict QC ensures stable and consistent quality
- Wholesale pricing for distributors
- Fast delivery and large inventory available
- OEM/ODM support for global brands
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.