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

• ER8 Collects
• ER11 Collects
• ER16 Collects
• ER20 Collects
• ER25 Collects
• ER32 Collects
• ER40 Collects

• Gripping range: 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.