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Ultra Precision ER20 Coolant Sealing Collets

  • ER20C-3;ER20C-4

  • chongde


Ultra Precision ER20 Coolant Sealing Collets

Chongde ER Coolant Collets uses the difference of grooves to achieve the function of surrounding sealing and center thru coolant. ER thru coolant collets made to be used with thru-coolant tools. It allow greater water pressure through the collet. The maximum water pressure can be 30Mpa. The gripping range of spring collet is 1mm or 0.040”, commonly used in tool holding. The Non-standard hole size can be customized.


1. Material: JIS-SUJ2

2. Hardness: 46-50HRC;

3. All collets are precision ground for less than 0.0002" (0.005mm )of indicated runout;

4. The maximum water pressure can be 30Mpa;

5. Commonly used with thru-coolant tools in tool holding.

Our advantages

1. Integrated precision : 3μ/5μ;

2. Imported material: JIS-SUJ2

3. Hardness: 46-50HRC

4. Clean appearance and accuracy stable

5. -196℃ long cryogenic treatment and ultra long time thermal aging processing, reducing residual stresses and increasing the hardness and toughness.

Product Drawing and Size


D D1 L L1
Model No. Range Slot
ER20C 3≤d<6 0.1 20 21 31.5 6.36 16
6~13 0.5 20

Clamping Range

Order No. Type Range Order No. Model No.
CD010203.20030 ER20C-3 3-2.9 CD010203.20032 ER20C-1/8
CD010203.20040 ER20C-4 4-3.9 CD010203.20036 ER20C-9/64
CD010203.20050 ER20C-5 5-4.9 CD010203.20039 ER20C-5/32
CD010203.20055 ER20C-5.5 5.5-5.4 CD010203.20044 ER20C-11/64
CD010203.20060 ER20C-6 6-5.5 CD010203.20048 ER20C-3/16
CD010203.20065 ER20C-6.5 6.5-6 CD010203.20052 ER20C-13/64
CD010203.20070 ER20C-7 7-6.5 CD010203.20056 ER20C-7/32
CD010203.20075 ER20C-7.5 7.5-7 CD010203.20059 ER20C-15/64
CD010203.20080 ER20C-8 8-7.5 CD010203.20064 ER20C-1/4
CD010203.20085 ER20C-8.5 8.5-8 CD010203.20067 ER20C-17/64
CD010203.20090 ER20C-9 9-8.5 CD010203.20071 ER20C-9/32
CD010203.20095 ER20C-9.5 9.5-9 CD010203.20075 ER20C-19/64
CD010203.20100 ER20C-10 10-9.5 CD010203.20079 ER20C-5/16
CD010203.20105 ER20C-10.5 10.5-10 CD010203.20083 ER20C-21/64
CD010203.20110 ER20C-11 11-10.5 CD010203.20087 ER20C-11/32
CD010203.20115 ER20C-11.5 11.5-11 CD010203.20091 ER20C-23/64
CD010203.20120 ER20C-12 12-11.5 CD010203.20095 ER20C-3/8
CD010203.20125 ER20C-12.5 12.5-12 CD010203.20099 ER20C-25/64
CD010203.20130 ER20C-13 13-12.5 CD010203.20103 ER20C-13/32

CD010203.20107 ER20C-27/64

CD010203.20111 ER20C-7/16

CD010203.20115 ER20C-29/64

CD010203.20119 ER20C-15/32

CD010203.20123 ER20C-31/64

CD010203.20127 ER20C-1/2

CD010203.20131 ER20C-33/64

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