Why Choose ER Collets?

 

ER collets are slotted (alternately) from both ends and therefore compress onto the cutter along the whole length of the collet when tightened. This not only provides a better grip on the cutter shank but also allows some variation (typically 1mm) in shank sizes that may be used in a single collet. The smaller size collets are best used to hold cutters no more than 0.5mm below the nominal size.

 

Inspecting the inside of our ER collet nuts reveals an internal flange that has been machined eccentric to the main axis of the nut. This is not a machining error but is designed that way to lock onto the groove of the collet and aid its release from the chuck body.

 

For this feature to work properly, the collet must be mounted in the nut first before fitting the assembly into the chuck body. To mount the collet in the nut, insert it on an angle, turn slightly and push it into the nut until it clicks into place on the eccentric flange. The cutter may now be fitted and the assembly tightened hard into the chuck body.

 

To remove the cutter, slacken and undo the nut until resistance is felt. Then, using a collet wrench, further undo the nut until the collet is released from the chuck body. Removal of the collet from the nut is the reverse of the mounting procedure.

ER25 Collets Clamping Range

 Nominal Size     Clamping Range (mm)

1.0mm                 0.5 - 1.0mm

1.5mm                 1.0 - 1.5mm

2.0mm                 1.5 - 2.0mm

2.5mm                 2.0 - 2.5mm

3.0mm                 2.5 - 3.0mm

4.0mm                 3.0 - 4.0mm

5.0mm                 4.0 - 5.0mm

6.0mm                 5.0 - 6.0mm

7.0mm                 6.0 - 7.0mm

8.0mm                 7.0 - 8.0mm

9.0mm                 8.0 - 9.0mm

10.0mm               9.0 - 10.0mm

11.0mm              10.0 - 11.0mm

12.0mm              11.0 - 12.0mm

13.0mm              12.0 - 13.0mm

14.0mm              13.0 - 14.0mm

15.0mm              14.0 - 15.0mm

16.0mm              15.0 - 16.0mm

Ausee Machines & Tools is dedicated to bringing you innovative high quality engineering products. We are the ONLY official distributor and after sales provider of SIEG machinery products in Australia. We select and work closely with our suppliers in order to ensure the quality of all our products meet our strict standard. Since we have great relationship with our suppliers, we are lucky to access some of the very unique and innovative engineering products you've ever seen.

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