An ER25 collet 8mm is a type of ER collet, which is a widely used clamping system for holding round-shank tools in machining operations. ER stands for “Elastic Range”, which means that the collet can slightly expand or contract to fit the tool shank within a certain range. An ER25 collet 8mm has a nominal bore size of 8mm, and can hold tools with shank diameters from 7.5mm to 8.5mm. The collet has a cylindrical shape with a tapered end that fits into an ER25 collet chuck. The collet chuck has a nut that tightens the collet around the tool shank, securing it in place. The collet and the chuck have matching grooves and slots that align the collet with the chuck and prevent it from rotating. The collet and the chuck also have a standard thread size of M32x1.5, which means that they can be used with any ER25 collet holder or spindle.
Features:
- High accuracy: The ER25 collet 8mm has a total runout of less than 0.0003 inches, which means that the tool shank is centered and aligned with the collet axis within a very small tolerance. This ensures a high-quality surface finish and dimensional accuracy of the machined part.
- Wide range of applications: The ER25 collet 8mm can be used for various machining operations, such as drilling, milling, tapping, and boring. It can also be used with different types of tools, such as end mills, drill bits, taps, reamers, and boring bars. The collet can handle high speeds and feeds, as well as high cutting forces and torques.
- Easy to use: The ER25 collet 8mm is easy to install and remove from the collet chuck. It only requires a wrench to tighten or loosen the collet nut. The collet has a smooth surface that prevents rust and corrosion, and a clear marking of the size and range on the body.
Specifications:
- Collet type: ER25
- Collet size: 8mm
- Collet bore size: 8mm
- Collet grip range: 7.5mm to 8.5mm
- Collet material: Alloy spring steel
- Collet hardness: HRC 44-48
- Collet surface treatment: Black oxide
- Collet runout: Less than 0.0003 inches
- Collet thread size: M32x1.5
- Collet weight: 0.07 lbs
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