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ER8 ER11 ER16 ER20 ER25 ER32 ER40 Collet Chuck DIN 6499 Spring Collets
The standard ER collet is the most widely used clamping system in the world. Made from Alloy spring steel and fully hardened these ER collets are ideal for many machining applications including boring, milling, reaming, tapping, and grinding.
ER collets have a wide clamping range and high accuracy. While they are designed for tool holding, they work great for work holding in small lathes. With a full set of ER collets, you can hold any diameter that is in the clamping range of the set.
ER Collet | Length | Diameter | Clamping Range |
ER-11 | 18 mm (0.71") | 11.5 mm (0.45") | 0.5—7 mm (0.020—0.276") |
ER-16 | 27.5 mm (1.08") | 17 mm (0.67") | 0.5—9 mm (0.020—0.354") |
ER-20 | 31.5 mm (1.24") | 21 mm (0.83") | 1—13 mm (0.039—0.512") |
ER-25 | 34 mm (1.34") | 26 mm (1.02") | 1—16 mm (0.039—0.630") |
ER-32 | 40 mm (1.57" | 33 mm (1.30") | 1—21 mm (0.039—0.827") |
ER-40 | 46 mm (1.81") | 41 mm (1.61") | 3—26 mm (0.188—1.024") |
FEATURES:
Powerful chucking, high precision, and easy operation;
Stable, precise machining at high rotational speeds;
Small-bore nut design minimizes interference with a workpiece, and speeds operation;
Various nuts can be used, depending on the application;
Double-taper collets have a longer clamping area for excellent gripping torque.
HIGH PRECISION:
High-precision collets provide excellent TIR and balance;
The 16-slot design provides high clamping force and accuracy;
Correct assembly increases your collet life and ensures low runout TIR.
Assembly instructions for ER collets
Insert collet groove into the eccentric ring of the clamping nut at the mark on the bottom of the nut; Push the collet in the direction of the arrow until it clicks in place; Screw the nut with the collet onto the collet holder.
We recommend tightening the nut with a torque wrench.
Disassembly instructions
After the nut is unscrewed from the collet holder, press on the face of the collet while simultaneously pushing sideways on the back of the collet opposite the mark until it disengages from the clamping nut.
RicoCNC can supply various size of ER collet, Precision: <0.008mm
Size | Range (in) | Range (mm) | ER-16 | ER-20 | ER-25 | Inch | Metric | ER-40 |
ER-32 | ER-32 | |||||||
1/32" | 0.020—0.039" | 0.5—1.0 mm | √ | |||||
1/16" | 0.039—0.079" | 1.0—2.0 mm | √ | |||||
3/32" | 0.079—0.118" | 2.0—3.0 mm | √ | √ | √ | √ | √ | |
1/8" | 0.118—0.157" | 3.0—4.0 mm | √ | √ | √ | √ | √ | √ |
3/16" | 0.157—0.197" | 4.0—5.0 mm | √ | √ | √ | √ | √ | |
7/32" | 0.197—0.236" | 5.0—6.0 mm | √ | √ | √ | √ | √ | |
1/4" | 0.236—0.276" | 6.0—7.0 mm | √ | √ | √ | √ | √ | √ |
5/16" | 0.276—0.315" | 7.0—8.0 mm | √ | √ | √ | √ | √ | |
11/32" | 0.315—0.354" | 8.0—9.0 mm | √ | √ | √ | √ | √ | |
3/8" | 0.354—0.394" | 9.0—10 mm | √ | √ | √ | √ | √ | |
13/32" | 0.394—0.433" | 10—11 mm | √ | √ | √ | √ | ||
7/16" | 0.433—0.472" | 11—12 mm | √ | √ | √ | √ | ||
1/2" | 0.472—0.512" | 12—13 mm | √ | √ | √ | √ | √ | |
17/32" | 0.512—0.551" | 13—14 mm | √ | √ | √ | |||
9/16" | 0.551—0.591" | 14—15 mm | √ | √ | √ | |||
5/8" | 0.591—0.630" | 15—16 mm | √ | √ | √ | |||
21/32" | 0.63—0.669" | 16—17 mm | √ | √ | ||||
11/16" | 0.669—0.709" | 17—18 mm | √ | √ | ||||
23/32" | 0.709—0.748" | 18-19 mm | √ | √ | ||||
3/4" | 0.748—0.787" | 19—20 mm | √ | √ | ||||
13/16" | 0.787—0.827" | 20—21 mm | √ | |||||
27/32" | 0.827—0.866" | 21—22 mm | √ | |||||
7/8" | 0.866—0.906" | 22—23 mm | √ | |||||
15/16" | 0.906—0.945" | 23—24 mm | √ | |||||
31/32" | 0.945—0.984" | 24—25 mm | √ | |||||
1" | 0.984—1.024" | 25—26 mm | √ |
OZ25, RDO collets also are available here.
RicoCNC also can supply other CNC spare tool parts, cnc tool holders, please contact us if you have any inquires!
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