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Description
Technical data for the ER16 Ø7 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 7-6 mm |
| Outside Diameter D | 17 mm |
| Overall Length L | 27.5 mm |
ER16 7 mm collet – reinforced clamping for medium diameters with a flexible 1 mm tolerance
The ER16 collet with a 6-7 mm range is designed to reliably hold cutting tools with common shank diameters. Hardened 65Mn steel construction with a hardness of 44-48 HRC ensures durability under intensive use, while precision manufacturing to DIN 6499B guarantees a maximum radial runout of 0.015 mm. The 1 mm collapse range eliminates the need for separate collets for 6 mm and 7 mm.
Key advantages of the ER16 7 mm collet
- Maximum radial runout of 0.015 mm – ensures dimensional repeatability when milling contours and precision holes
- Clamping range of 6-7 mm with a 1 mm collapse range – a tolerance twice as wide as ER11 reduces the number of sizes required in stock
- 65Mn steel hardened to 44-48 HRC – maintains elasticity and clamping force throughout its service life
- System of 16 evenly spaced slots – concentric clamping pressure protects delicate tools from damage during clamping
- Manufactured according to DIN 6499B and ISO 15488-B – full interchangeability with holders from leading CNC milling machine and lathe manufacturers
Used for machining structural steels, aluminum alloys, and engineering plastics. The greater mass of the ER16 collet compared with ER11 effectively dampens vibration at high rotational speeds, extending cutting edge life. The 7 mm diameter is standard for twist drills, end mills, and machine taps. Chosen by professionals who require stability and precision in series production.
Frequently asked questions
It can be used for both roughing and finish milling, precision hole drilling, machine tapping, and countersinking. The clamping range covers 6-7 mm tools.
When used in accordance with the manufacturer's recommendations and lubricated regularly, the collet performs thousands of clamping operations while retaining its full elastic properties. The use of 65Mn steel and a design with 16 slots ensures a long service life.
The ER16 system provides twice the collapse range (1 mm compared with 0.5 mm for ER11), greater clamping stability, and more effective vibration damping due to the component's greater mass.
The ER11 system measures 11.5×18 mm, ER16 measures 17×28 mm, ER32 measures 33×40 mm, and the largest ER40 measures 41×46 mm. Identification is made easier by the system designation engraved on each collet in accordance with DIN 6499B.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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