ER Collets

ER collets are the industry‑standard toolholding system for CNC machining, offering high precision, strong clamping force, and wide compatibility across milling, drilling, tapping, and engraving applications. They are made of hardened spring steel, available in sizes ER8 to ER50, and ensure minimal runout with self‑releasing functionality.

Applications

CNC machining centers
Mold manufacturing & precision tooling
Aerospace & automotive component machining
Woodworking & engraving equipment
Industrial drilling & tapping systems

Material: High‑grade spring steel (65Mn or alloy steel), heat‑treated for elasticity and wear resistance.
Design: Multi‑slot spring collet with symmetrical slits for uniform compression.
Clamping Range: Typically 1 mm per collet, reducing the number of collets needed.
Accuracy: Concentricity tolerance up to ≤0.005 mm, ensuring stable tool rotation.
Backlash/Runout: Very low, suitable for precision machining.
Self‑Release Feature: Prevents tool sticking after machining.
Surface Hardness: HRC 44–48, with a corrosion‑resistant finish for long service life.

Versatile Compatibility: Fits all standard ER collet holders and CNC spindle interfaces.
Superior Clamping Force: Strong, uniform grip reduces tool slippage.
Excellent Balance: Precision-ground for high‑speed spindle performance.
Wide Range: ER8 to ER50 covers micro‑engraving up to heavy industrial milling.
OEM/ODM Options: Custom engraving and branding available.

ER Size	Clamping Range (mm)	Typical Use
ER8	0.5 – 5.0	PCB routers, engraving, micro‑tools
ER11	0.5 – 7.0	Small CNC routers, fine detail work
ER16	0.5 – 10.0	Mid‑size routers, light milling
ER20	1.0 – 13.0	Professional routers, woodworking
ER25	1.0 – 16.0	Heavy‑duty CNC routers, production
ER32	2.0 – 20.0	Industrial machining centers
ER40	3.0 – 26.0	Large CNC mills, heavy cutting
ER50	6.0 – 34.0	Extra‑large tooling, industrial use

High Precision Er Collets

Er Collets

Request Quote

Enquire Now

Get notified about engineering tips sales, new products, and events.