Precision ER Flexible Collets for CNC machine

The ER collet is a high-precision clamping system designed for CNC lathes, offering secure and centered gripping of tools or workpieces with minimal runout. Its elastic design allows for even compression, ensuring a consistent hold and preventing slippage during high-precision machining tasks.

Ideal for a wide range of applications, ER collets provide versatility and reliability in both professional and industrial environments.

Minimum Order Quantity: 20 pieces per order.

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Products Parameters

ER8, ER11, ER16, ER20, ER25, ER32, ER40
Model NO.	D1	L	PCS/SET	RANG SIZE(D2)
ER8	8.5	13.5	--	1,1.5,2,2.5,3,3.5,4,4.5,5
ER11	11.5	18	13	1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7
			7	1,2,3,4,5,6,7
ER16	17	27	10	1,2,3,4,5,6,7,8,9,10
			8	3,4,5,6,7,8,9,10
ER20	21	31	12	2,3,4,5,6,7,8,9,10,11,12,13
			10	4,5,6,7,8,9,10,11,12,13
			15	2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
ER25	26	35	7	4,6,8,10,12,14,16
			18	3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20
ER32	33	40	11	4,5,6,8,10,12,13,15,16,18,20
			6	6,8,10,12,16,20
			23	4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26
ER40	41	46	15	4,5,6,8,10,12,13,15,16,18,20,21,22,25,26
			7	6,8,10,12,16,20,25

What Are The Sizes Of ER Collets?

The ER collet comes in a variety of sizes to accommodate different tool diameters and applications. The size of an ER collet is typically denoted by a number following the “ER” designation, which represents the collet’s opening diameter in millimeters. For instance, an ER16 collet has an opening diameter of approximately 16mm.

Here’s a breakdown of common ER collet sizes

ER8: Used for very small tools, with diameters ranging from 0.5mm to 5mm.

ER-11: Suitable for tools with diameters between 1mm to 7mm.

ER-16: A versatile size, accommodating tools ranging from 1mm to 10mm.

ER20: Designed for tools with diameters between 1mm and 13mm.

ER25: Fits tools ranging from 1mm to 16mm.

ER-32: A popular choice for many machinists, this collet can hold tools between 2mm and 20mm.

ER40: Suitable for larger tools, with diameters ranging from 3mm to 26mm.

ER50: Designed for heavy-duty applications, accommodating tools between 10mm and 34mm.

ER Collet	Length	Diameter	Clamping Range
ER-11	18 mm (0.71″)	11.5 mm (0.45″)	0.5—7 mm (0.020—0.276″)
ER-16	27.5 mm (1.08″)	17 mm (0.67″)	0.5—9 mm (0.020—0.354″)
ER-20	31.5 mm (1.24″)	21 mm (0.83″)	1—13 mm (0.039—0.512″)
ER-25	34 mm (1.34″)	26 mm (1.02″)	1—16 mm (0.039—0.630″)
ER-32	40 mm (1.57″)	33 mm (1.30″)	1—21 mm (0.039—0.827″)
ER-40	46 mm (1.81″)	41 mm (1.61″)	3—26 mm (0.118—1.024″)

It’s essential to choose the correct collet size for the tool or workpiece to ensure optimal grip and precision during machining operations. Using the right size not only enhances accuracy but also prolongs the lifespan of both the collet and the tool.