Page 136 - MILLING CATALOG p549-788

ER, SC & SHRINK COLLETS USER GUIDE

ER - Top Clamping Nut for DIN 6499 Collets

Description Extraction Procedure
Friction bearing ER nut is a nut with a unique 1 Align the engraved diamond shape which is on the
two-piece exclusive friction mechanism, combining
radial and angular self-centering movements. silver ring (D), with any of the key slots (E) of the nut.
2 Place the nut with the collet facing down on
Features
• Unique two-piece friction bearing a clean and horizontal work surface.
• Radial and angular float for better concentricity 3 Insert a screwdriver vertically between the
• Powerful gripping force, 50-100% higher than the
nut slots and the collet on the reverse side
standard ER nut due to the friction bearing mechanism of the engraved diamond shape (D).
• Balanced for higher spindle spin due to 4 Tilt the screwdriver outwards, while helping
the extraction by pushing the collet’s back
unique extractor teeth design end in the opposite direction (F).
• Compact design - general dimensions and size
E, D F
range are the same as the standard nut
• Designed for use with sealed collets E
D
Always assemble the collet into the nut before mounting onto

the collet chuck.

Insertion Procedure
1 Insert the collet at an angle, fitting the two extractor

teeth which protrude (A) into the collet’s groove (B).
2 Place the two parts on a clean and

horizontal work surface.
3 Press down with your thumb on the back end

of the collet until it clicks into place (C).

AB C Nut type Kgxm
Collet Groove
ER-11 5

ER-11M 3

ER-16 7

ER-16M 4

ER-20 12

ER-20M 8

ER-25 20

A A Extractor Teeth ER-32 22

Important: Never insert the collet parallel to the extractor ER-40 25
ring. Doing this will chip or break the extractor’s teeth.
When unclamping the nut, the collet will self-release ER-50 35
from the chuck by means of extractor teeth.
Note: For maximum performance, the clamping nut thread and collet
taper must be cleaned and oiled before use.

Recommended Clamping Torque for Standard
ER & ER-Top Clamping Nut

Important: This torque is calculated with the maximum
diameter capacity per collet which should be gradually
reduced when used with a smaller shank size.

684 ISCAR