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Nickel Coating ER UM Type Nut

  • ER16UM;ER20UM

  • chongde


Nickel Coating ER UM Type Nut

Chongde ER UM Type Nut made by 20CrMnTi material. All the nuts are through long time cryogenic treatment and thermal aging treatment to improve the stability of accuracy and dimensions. All the ER nuts are pre balanced G2.5 20000rpm and G2.5 30000rpm. The surface with nickel coating that can improve the hardness and endurance of nuts. Also it has cleaness better, anti-rust, stable accuracy and smooth surface features. ER UM type nut using with BT/HSK/CAT/BBT/NT-ER tool holder and ER straight shank collet chuck. The ER UM type Nut is used with ER UM type wrench.


1. Material: 20CrMnTi

2. Hardness: 50-53 HRC;

3. Thread Tolerance: 4H;

4. Pre balance is G2.5 20000rpm/30000rpm;

Our advantages

1. Nickel coating surface: antirust, surface smooth and high endurance.

2. 20CrMnTi material: high hardness 50-53 HRC.

3. Default balancing G2.5 20000rpm/30000rpm

4. Cryogenic treatment and thermal aging process. Stable accuracy and long using lif

Product Drawing and Size


Order No. Type Model No D L T
CD010307.1632022 UM/RD ER16UM 32 17 M22x1.5P
CD010307.2035019 ER20UM 35 19 M25x1.5P
CD010307.2542032 ER25UM 42 20 M32x1.5P
CD010307.3250040 ER32UM 50 22.5 M40x1.5P
CD010307.4063050 ER40UM 63 25.5 M50x1.5P
CD010307.5078064 ER50UM 78 35.5 M64x2.0P

Mounting instruction for ER collets and Nuts

1. Put the collet into the nut,turn the collet slightly. Push it into the nut at the offered direction evenly when the offset flange sinks into the undercut of the collet.

2. Fix the nut and the collet on the spindle rotate the nut until the collet is in pressing, Wipe the straight shank of cutter , and instert it into the pilot hole. Tighten the  nut with a wrench till the cutter is clamped heavily (Caution:never tighten the nut without cutter in it for it will break).

3. When changing the tool.Loosen the nut and it shall bring out the collet and the cutter together.And then draw the cutter out push out slightly the collet in the offered direction,it shall be ready for any change of the cutter.

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