The ER Series Collets are precision-engineered clamping components designed for CNC spindle motors, routers, and engraving machines. These high-accuracy collets provide a secure and stable connection between the spindle and cutting tools, ensuring minimal runout, improved cutting precision, and extended tool life.
Available in a wide range of sizes from ER8 to ER40, including ER11, ER16, ER20, ER25, and ER32, these collets are suitable for a variety of CNC applications, from small engraving bits to larger milling tools. Made from hardened steel, they offer exceptional durability and are resistant to deformation even under high-speed machining conditions.
With a reliable clamping system, ER collets are the ideal choice for woodworking, metalworking, and plastic CNC operations, providing consistent performance for both industrial and professional workshop environments.
ER8-ER40
JST
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Product Description
The ER Series Collets are precision-engineered clamping components designed for CNC spindle motors, routers, and engraving machines. These high-accuracy collets provide a secure and stable connection between the spindle and cutting tools, ensuring minimal runout, improved cutting precision, and extended tool life.
Available in a wide range of sizes from ER8 to ER40, including ER11, ER16, ER20, ER25, and ER32, these collets are suitable for a variety of CNC applications, from small engraving bits to larger milling tools. Made from hardened steel, they offer exceptional durability and are resistant to deformation even under high-speed machining conditions.
With a reliable clamping system, ER collets are the ideal choice for woodworking, metalworking, and plastic CNC operations, providing consistent performance for both industrial and professional workshop environments.
Wide Size Range – ER8, ER11, ER16, ER20, ER25, ER32, ER40 for versatile tooling
High Precision – Minimal runout for accurate machining (≤0.008mm)
Durable Construction – Hardened steel material for long-lasting performance
Secure Clamping – Maintains tool stability at high RPMs
Compatible with CNC Spindles – Perfect for routers, engraving machines, and milling machines
Easy Tool Change – Quick and reliable collet insertion and removal
Multi-Material Use – Ideal for wood, metal, plastics, and composites
The ER Series Collets are suitable for various CNC machining and industrial applications:
CNC milling machines
CNC engraving machines
Woodworking routers
Metal and plastic machining
Multi-head CNC spindle systems
High-speed spindle operations requiring precision
| Specification | Details |
|---|---|
| Collet Series | ER Series |
| Size Range | ER8 – ER40 |
| Material | Hardened Steel |
| Accuracy | ≤0.008mm |
| Compatible Tools | Milling cutters, engraving bits, CNC end mills |
| Usage | CNC Spindles, Routers, Engraving Machines |
| Cooling Type | Air or water-cooled spindle compatible |
ER8 AA Lv
ER11 AA Lv
ER16 AA Lv
ER20 AA Lv
ER25 AA Lv
ER32 AA Lv
ER40 AA Lv
ER8 UP Lv
ER11 UP Lv
ER16 UP Lv
ER20 UP Lv
ER25 UP Lv
ER32 UP Lv
ER40 UP Lv
Our ER collets are manufactured to meet the highest standards of precision, durability, and reliability, making them the preferred choice for professional CNC operators and industrial manufacturers.
With our wide selection of sizes, high-quality material, and strict tolerance control, our collets ensure stable performance, long tool life, and consistent machining results.
Wide range of sizes for diverse tool compatibility
High accuracy reduces runout and improves cutting precision
Hardened steel construction ensures longevity
Compatible with most industrial CNC spindle systems
Trusted by professionals worldwide
CE certification
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LVD certification
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ROHS certification
UKCA certification
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Packing
Packing
Packing
Packing
Packing
1.The electric spindle motor and VFD shall be suitable with each other. The specifications and parameter settings of the VFD shall match the nominal parameters of the spindle motor, and it will burn the spindle motor if the settings are not correct. (Therefore, the spindle motor must be connected to VFD at first.)
2.Before using water-cooled spindle motor, it shall ensure that cooling cycle system works normally. Please notice: the running under no cooling conditions is prohibited! The volume of cooling water is calculated as per 1 liter/minute, the minimum flow of cooling water is not less than 5 liter/minute, cooling water pipe and the nozzle shall be connected reliably and there is no leakage.
3.The cooling liquid shall be clean and free of grease and the temperature shall be within 5-30℃. The cooling medium shall carry out force cooling when the ambient temperature is higher than 30℃. The precision lathe requires the cooling liquid with a constant temperature of 20±2℃.
4.Important! The coolant temperature must be within 5℃ of the ambient temperature; ideally, the coolant temperature should be 5℃ lower than the ambient temperature. Otherwise, if the temperature difference is too large, condensation may form inside the electric spindle, leading to spindle damage.
5.If use water cooling machine, its temperature shall be within 22-25℃.
6.During storage and transport of the spindle motor, the status of high-speed grease inside the bearing will change. So, user shall run it at a low speed first by starting from the lowest speed of the spindle motor for 30 minutes and then 20 minutes for every 3000 rounds when they first time receiving spindle motors. Otherwise there will have abnormal sound, noise, heat and other phenomena, which will affect the bearing life if the spindle motor is started directly at a high speed. During long term storage, the spindle motor shall run (at low speed) for 15-30 minutes once a week at least.
7.Before daily machining, the spindle motor shall be warmed up, run for 15-20 minutes when the machining speed is reached and then performs precise machining. It is better to stop the spindle motor for two hours every day in order to recover its mechanical fatigue and prolong its life time.
8.The spindle motor adopts vapor lock and the gas source shall not be used until it has passed oil-water separator and dry filter. The air pressure is 0.2-0.25Mpa and the filtering precision is 5μm, otherwise there will cause damages to the bearing. Therefore, a good oil-water separator is essential.
9.Collet, nut and inner taper hole shall be cleaned when installing blades on the spindle motor in order to avoid any impact on the precision. The blade handle shall be inserted into the collet more than 15mm.
10.No hammering the end cover of the spindle motor. No hammering the collet and blade head when removing blades. No shocking or colliding during transport, storage and using, especially pay attention to the end of the spindle motor.
11.The spindle motor shall run in designated direction. (We will indicate the direction with an arrow.)
12.The spindle motor shall be installed and fixed according to the relevant drawings and instructions.
Spindle motor is also called high-speed electric spindle motor, refers to the revolution of a more than 10000 RPM AC motor. It has the advantages of fast speed, small size, lightweight, low material consumption, low noise, and low vibration, mainly used in wood, aluminum, stone, hardware, glass, PVC, and other industries.
Due to its wide application and meticulous work, fast speed, and excellent processing quality, making another ordinary motor can not meet the technical requirements of the spindle motor. Spindle motor plays an important role in the industrial production process, so it is particularly popular all over the world.
