Precision R8 Collet Set (Metric / Inch) | For Bridgeport Milling Machines

[Product Overview]

The R8 Collet is the most common tool holding system for manual vertical milling machines (specifically the Bridgeport R8 taper). It features a keyway for orientation and a threaded hole at the top for the drawbar. Our R8 collets are engineered to hold end mills, drill chucks, and fly cutters securely, providing the rigidity needed for precise milling operations.

[Key Features & Advantages]

• Universal Compatibility: Designed to fit any milling machine with a standard R8 spindle taper, ensuring a perfect fit for Bridgeport and clone mills.

• Premium Material: Made from high-quality alloy spring steel (65Mn or SUJ2), heat-treated to HRC 55-60 for maximum wear resistance and spring retention.

• Precision Ground: All critical surfaces, including the taper and bore, are precision ground to achieve a runout (T.I.R.) of ≤ 0.015mm (0.0006"), ensuring accurate cuts.

• Standard Drawbar Thread: Features the industry-standard 7/16"-20 UNF internal thread for imperial drawbars (Metric M12 thread also available upon request for specific markets).

• Wide Size Range:

• Metric: 3mm to 24mm.

• Imperial: 1/16" to 7/8" (including popular 1/8", 1/4", 3/8", 1/2", 5/8", 3/4").

[Why Partner with Pingyuan Zhenghao Machinery?]

We are a leading manufacturer of machine tool accessories in China, offering unbeatable factory-direct prices.

• Popular Sets Available: We specialize in selling R8 collets in sets (e.g., 11-piece imperial set: 1/8" - 3/4" by 1/16ths), packaged in a durable plastic or wooden case for easy organization.

• Large Inventory: We keep thousands of R8 collets in stock, ensuring quick turnaround times for your orders.

• Quality Assurance: Every collet is inspected for hardness, thread quality, and concentricity before leaving our factory.

• One-Stop Sourcing: We also supply R8 Drill Chuck Arbors, R8 End Mill Holders, and Clamping Kits to fully equip your milling machine.

Frequently Asked Questions (FAQ) - OEM & Orders

Q1: Do your R8 collets come in sets?

A: Yes! R8 collet sets are our best-sellers. Common configurations include:

• 6-Piece Set: 1/8, 3/16, 1/4, 3/8, 1/2, 5/8, 3/4 inch.

• 11-Piece Set: 1/8 to 3/4 inch by 1/16ths.

• 13-Piece Set: 1/8 to 7/8 inch by 1/16ths.

• Metric Sets: e.g., 3mm-20mm.

Q2: What is the drawbar thread size?

A: The standard thread for our R8 collets is 7/16"-20 UNF. This is the standard for almost all Bridgeport-style mills. If you require a metric drawbar thread (M12), please specify this in your inquiry, as it is less common but available.

Q3: Can I buy individual sizes to replace worn ones?

A: Absolutely. You can order individual collets in any quantity to replenish your stock or replace damaged tools.

Q4: Do you offer OEM branding?

A: Yes, we can laser-mark your logo and size on the collet face or body. We can also customize the set packaging (color of the box, label design) to match your brand.

Equip your manual mills with reliable, high-precision R8 collets.Contact us today for our latest price list and catalog.

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