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R8 collet with round hole,square hole,hex hole:
1. material:65Mn
2.Hardness:clamping part HRC55-60
elastic part HRC40-45
3.The R8 collets are used for all kinds of milling machie,whose spindle taper hole is R8,such as X6325,X5325 etc.
4. About the R8 Collet :
What does R8 mean for collet?
An R8 collet is a specialized clamping device used in machining and milling. It is designed to hold workpieces securely in place, allowing for precise cutting, shaping, and drilling operations. The "R8" designation refers to the taper size of the collet, which is commonly found on milling machines
What size are R8 collets?
R8 Collets in round sizes are 1/16" to 7/8" in 1/32" increments, or 3mm to 22mm in 1mm increments.
Why do R8 collets have a keyway?
R8 collets have a keyway to prevent rotation when fitting or removing, but it is the compressed taper and not the keyway that provides the driving force. Collets are compressed by a drawbar from behind, they are self releasing and tool changes can be automated.
What is an R8 shank?
R8 taper shank ER collet chucks are typically used on. manual milling machines. The R8 taper end fits into a. machine spindle and the ER collet nut is compatible. with ER collet.
What is the largest R8 collet size?
The standard R8 Collet is 20mm while the extending R8 collet is 25mm.
5.The drawings of R8 collet is given as below:
| type | clamping range | weight(kg) |
| round hole | 1-20mm or 1/16"-7/8" | 0.24 |
| square hole | 3-13mm or 1/8"-1/2" | 0.24 |
| hex hole | 3-16mm or 1/8"-5/8" | 0.24 |
5.The runout of R8 inspection is give as below:
| d | L | runout | ||
| mm | in | mm | in | mm |
| 1 ~1.6 | 1/32 ~1/16 | 6.35 | 0.0006 | 0.015 |
| ›1.6 ~3 | ›1/16 ~1/8 | 12.7 | 0.0006 | 0.015 |
| ›3 ~10 | ›1/8 ~3/8 | 25.4 | 0.0006 | 0.015 |
| ›10 ~16 | ›3/8 ~5/8 | 38.1 | 0.0006 | 0.015 |
| ›16 ~20 | ›5/8 ~7/8 | 50.8 | 0.0006 | 0.015 |
1. Are you a factory or trading company?
We are integration of industry and trade.
2. Could you provide non standard products?
Yeswe can.We can also make and supply the goods as delivered samples of drawings.
3. What products do you supply?
We can supply tool holders;wood working mentals;machine accessories;tool bits&thread tool
4. Could you supply samples?
Yes, we can.
5. Can I buy one piece?
Yes, we accept one piece order.
6.How about your product warranty?
Our product warranty is 12 month
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