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Precision ER Flexible Collets for CNC machine

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ER flexible collets.jpg
ER flexible collets.jpg

Precision ER Flexible Collets for CNC machine

The ER collet is a type of clamping system designed to hold tools or workpieces with utmost precision. Characterized by their unique external profile and slits, these collets provide a wide clamping range, making them versatile for various applications. The “ER” stands for “Elastic Regular”, indicative of their elastic deformation capability, which ensures a tight grip. They are installed on CNC lathes.

The science behind their design is truly fascinating. ER collets are crafted to have a slight taper, allowing them to compress onto the tool or workpiece as the collet nut is tightened. This ensures a centered and secure hold, minimizing any potential runout. The precision of ER collet is not just by chance; it’s a result of meticulous engineering. Their design ensures that the force is evenly distributed, providing a consistent grip and preventing tool slippage, making them a favorite in high-precision machining tasks.

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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.