ER Collet, Milling Machine Collet

The ER collet system is the most widely used tool holding system in the world. Installed on the milling machine, it is a cylindrical chuck which is used to fix drilling bits or milling tool. ER collets are used in the various machining processes, such as boring, milling, reaming, tapping and grinding. The ER collet can be used in all kinds of machine tools, such as Japanese FUJI, Taiwan WANG TZYY, Greenway, MYLAS and other automatic lathes.

The materials of ER collet: 9SiCr alloy tool steel, SUJ2 bearing steel

We can provide several types of ER collet as follows:
  • ER8 Collects
  • ER11 Collects
  • ER16 Collects
  • ER20 Collects
  • ER25 Collects
  • ER32 Collects
  • ER40 Collects
Parameters
  • Gripping range:
    ER Collet, Milling Machine Collet

    ER11=0.5mm, ER16/20/25/32=1mm (Take ER11 collet as an example, the size of collet is 7mm and it can grip between 6.75mm and 7.25mm; if choosing ER16 collet, the size of collet is 10mm and it can grip from 9.5mm to 10.5mm)

    Type D L L1 L2 Size of collet
    ER11 11.4mm 17.7mm 13.5mm 2.2mm 1.0-7.0mm
    ER16 16.7mm 27.6mm 21mm 3.9mm 1.0-10.0mm
    ER20 20.8mm 31.7mm 24mm 5mm 1.0-13.0mm
    ER25 25.8mm 34.2mm 26.3mm 4.8mm 2.0-16.0mm
    ER32 33mm 40mm 30.9mm 5.5mm 3.0-20.0mm
  • The gripping ability of ER collet
    Type Gripping ability Length of collet
    ER8 0.5-5.0 13.5
    ER11 0.5-7.0 18
    ER16 0.5-10.0 27.5
    ER20 1.0-13.0 31.5
    ER25 1.0-16.0 34
    ER32 2.0-20.0 40
    ER40 3.0-26.0 46
    ER50 6.0-34.0 60
  • Concentricity of ER collet
    Size of collet mm L mm Concentricity（mm）
    Regular A AA
    1.0-1.4 6 0.015 0.01 0.005
    1.5-2.9 10
    3.0-5.9 16
    6.0-9.9 25
    10-17.9 40 0.02 0.015 0.01

LONNZ is a premium provider of tooling solutions. We can provide all kinds of precision collet, CNC collet chuck and other lathe metalworking accessories. We are capable of suppling matching machining tools for all types of precision manufacturing companies. Our advantages lie in stable capability of product offering and outstanding ability of manufacturing. We can provide collets for SANDVIK NTK, KYOCERA, KORLOY, MITSUBISHI, TUNGALOY, SUMITOMO and other machines of famous brands. Sufficient items are available in stock. Also, our factory is located in Shenzhen and our supply chains of cutting tools, collets, milling tools and other machining tools are well-organized, so we can get all kinds of raw materials and processed materials including 9SiCr alloy tool steel and SUJ2 bearing steel very quickly at a low cost. We utilize dozens of CNC machining centers and well trained mechanic teams, which enables high-accuracy cutting, milling, chipping, grinding and other operations. For collets of machine tools, we can limit its error of concentricity precision up to 0.003mm and extend its life span to 600,000 times. We welcome our customers who need collets to provide us with your samples or drawings and we are able to satisfy your needs.

LONNZ has been specialized in producing various types of precision collets since the company’s early years. Starting in 2015, to meet the needs of our customers, we began expanding our product lines. Today, we provide a variety of turning tools, milling tools, drill bits, carbide inserts, and grinding wheels among many other products.

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