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    19 Products

    ER Collets

    Image of System. Side1 orientation. CrossSection view. Contains Annotated. Milling Machine Collets. ER Collets.
    Image of Product. Front orientation. Milling Machine Collets. ER Collets.
    The most widely used type of collet, these collets hold cutting tools in ER collet chucks for milling, drilling, and routing. Spring slots clamp evenly around the shank to minimize runout for clean, accurate cuts and long tool life. The slots flex to grip slightly undersized shanks too, so you don't need an exact match for each cutting tool in your lineup. You can also use these collets in ER collet fixtures and custom setups to keep small round parts centered.
    52100 Alloy Steel—Hardened 52100 alloy steel collets are made from the same tough material used to make bearings. They’re more wear-resistant than basic spring steel collets but will wear faster than hardened chrome-moly steel collets if you change bits frequently.
    Chrome-Moly Steel—Hardened chrome-moly steel collets are more wear-resistant than hardened 52100 alloy steel collets. They hold their shape better over time and have lower runout, even with frequent bit changes. Often used for high-volume production runs, they stand up to high-speed, high-force machining in any material.
    Collet
    Size
    Grip Range
    Total Indicated Runout
    (TIR) Accuracy
    ID Tolerance
    Max. Body
    Dia.
    Overall
    Lg.
    Specs. Met
    Each
    ER-8
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.094"0.0002"-0.0004" to 0"0.33"0.51"DIN 6499-B, ISO 15488 Form B9397N12000000
     
    ER-11
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.093"0.0002"-0.0004" to 0"0.45"0.71"DIN 6499-B, ISO 15488 Form B4560N20200000
     
    Hardened Chrome-Moly Steel
    3/32"0.074" to 0.094"0.0002"-0.0001" to 0.0001"0.46"0.71"DIN 6499-B, ISO 15488 Form B4560N10300000
     
    ER-16
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.093"0.0002"-0.0004" to 0"0.67"1.08"DIN 6499-B, ISO 15488 Form B3215A11200000
     
    Hardened Chrome-Moly Steel
    3/32"0.074" to 0.094"0.0002"-0.0001" to 0.0001"0.68"1.06"DIN 6499-B, ISO 15488 Form B3215A30300000
     
    ER-20
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.093"0.0002"-0.0004" to 0"0.83"1.24"DIN 6499-B, ISO 15488 Form B1724N10300000
     
    Hardened Chrome-Moly Steel
    3/32"0.074" to 0.094"0.0002"-0.0001" to 0.0001"0.83"1.22"DIN 6499-B, ISO 15488 Form B1724N1200000
     
    ER-25
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.093"0.0002"-0.0004" to 0"1.02"1.34"DIN 6499-B, ISO 15488 Form B3669N10200000
     
    Hardened Chrome-Moly Steel
    3/32"0.074" to 0.094"0.0002"-0.0001" to 0.0001"1.03"1.38"DIN 6499-B, ISO 15488 Form B3669N1200000
     
    ER-32
     
    Hardened 52100 Alloy Steel
    3/32"0.054" to 0.093"0.0002"-0.0004" to 0"1.3"1.57"DIN 6499-B, ISO 15488 Form B3321A30200000
     

    R8 Collets

    Image of Product. Front orientation. Milling Machine Collets. R8 Collets.
    Grip cutting tools in the R8 taper spindle of your Bridgeport or other milling machine. These collets thread onto your machine’s drawbar, pulling them into the spindle so they can clamp tightly around your bit.
    The lower the runout, the higher the accuracy and the longer the tool life.
    0.0008" Total Indicated Runout (TIR) Accuracy—An accuracy of 0.0008” works well for roughing and heavy material removal, where tight tolerances aren't critical.
    Collet
    Size
    ID Tolerance
    Body
    Dia.
    Overall
    Lg.
    Internal
    Thread Size
    Each
    Hardened Steel—0.0002" Total Indicated Runout (TIR) Accuracy
    3/32"-0.004" to 0"0.95"4.089"7/16"-20
    		3257A62000000
     
    Hardened Steel—0.0008" Total Indicated Runout (TIR) Accuracy
    3/32"-0.004" to 0"0.95"4.134"7/16"-20
    		3257A33500000
     

    5C Lathe Collets

    Image of Product. Front orientation. Contains Inset. Lathe Collets. 5C Lathe Collets, Round Face.

    Round Face

    These collets tightly grip workpieces when installed into a 5C collet chuck or holder. They provide a stronger hold on small workpieces than a standard lathe chuck.
    Collet
    Size
    Total Indicated Runout
    (TIR) Accuracy
    Workpiece Dia.
    Tolerance
    Body
    Dia.
    Overall
    Lg.
    Internal Thread
    Size
    External Thread
    Size
    Material
    Each
    Round Face
    3/32"0.0008"-0.004" to 0"1 1/4"3.27"1.041"-241.238"-20Steel
    		3223A413000000
     

    Collets for Air-Powered Bit and Bur Die Grinders

    Image of System. Front orientation. Contains Annotated. Die Grinder Collets. Collets for Air-Powered Bit and Bur Die Grinders.
    Image of Product. Front orientation. Die Grinder Collets. Collets for Air-Powered Bit and Bur Die Grinders.
    Restore a secure grip on bits and burs in air-powered die grinders. These replacement collets eliminate the runout and vibration that develop as the original collet wears. A worn collet can cause premature bit breakage and poor surface finish. Replacing it at the first sign of looseness keeps your grinder performing accurately.
    Collet
    Size
    Mfr. Model
    No.
    For Mfr. Model No.
    Each
    For Dotco
    3/32"1021040400-08, 10R0401-18, 10R401-16, 10R9000-08, 12R0400-18, 12R0401-16, 12R9180-084343A86000000
     

    DA Collets

    Image of System. Front orientation. CrossSection view. Contains Annotated. Milling Machine Collets. DA Collets.
    Image of Product. Front orientation. Milling Machine Collets. DA Collets.
    Also known as double-angle and Erickson collets, these collets are used for drilling, reaming, and light milling. They grip cutting tools in DA collet chucks but are less accurate and have a weaker grip than ER and TG collets. This can lead to a shorter life for these collets and cutting tools. You can also use them with die grinders to hold bits and burs.
    Collet
    Size
    Grip Range
    Total Indicated Runout
    (TIR) Accuracy
    ID Tolerance
    Max. Body
    Dia.
    Overall
    Lg.
    Each
    DA-100
     
    Hardened Steel
    3/32"0.078" to 0.093"0.0004"-0.0004" to 0"0.77"1.44"9437N15000000
     
    DA-180
     
    Hardened Steel
    3/32"0.078" to 0.093"0.0004"-0.0004" to 0"1.04"1.63"9437N3400000
     
    DA-200
     
    Hardened Steel
    3/32"0.078" to 0.093"0.0004"-0.0004" to 0"0.53"1.19"9437N5500000
     
    DA-300
     
    Hardened Steel
    3/32"0.078" to 0.093"0.0004"-0.0004" to 0"0.38"1"9437N7400000
     

    ER Coolant Control Collets

    Image of System. Side1 orientation. CrossSection view. Contains Annotated. Milling Machine Collets. ER Coolant Control Collets.
    Image of ProductInUse. Sealed Shown in Use. Front orientation. Milling Machine Collets. ER Coolant Control Collets, Sealed Coolant Delivery Collet.
    Image of Product. Sealed. Front orientation. Milling Machine Collets. ER Coolant Control Collets, Sealed Coolant Delivery Collet.

    Sealed

    Shown in Use

    Sealed

    Made with high-performance machining in mind—these collets not only grip your cutting tool but also direct coolant to the tool's cutting edge. They have coolant channels designed to work with through-spindle coolant (TSC) systems to clear chips and reduce heat from friction, resulting in clean cuts and long tool life. Place them directly into your ER collet holder, no need to fuss with special collet nuts, coolant rings, or repositioning hoses and nozzles with every setup change.
    You get the benefits of using an ER collet, too. Spring slots clamp evenly around the shank to minimize runout for accurate cuts. Keep in mind, these collets must form a tight seal around the tool shank for proper coolant delivery, so match the shank size to the collet size exactly for the best results.
    Sealed Coolant Delivery Collet—Sealed collets run coolant through the cutting tool, so they only work with tools that have coolant holes. Since the coolant runs through the tool, they’re a better choice for deep-hole drilling and high-speed machining than collets with angled ports. Steel seals are built into their body, so they withstand higher pressure and last longer than collets with rubber seals.
    52100 Alloy Steel—Hardened 52100 alloy steel collets are made from the same tough material used to make bearings. They’re more wear-resistant than basic spring steel collets but will wear faster than hardened chrome-moly steel collets if you change bits too frequently.
    Collet
    Size
    Grip
    Range
    Total Indicated Runout
    (TIR) Accuracy
    ID Tolerance
    Max. Coolant
    Pressure, psi
    Max. Body
    Dia.
    Overall
    Lg.
    Specs. Met
    Each
    ER-16—Sealed
     
    Hardened 52100 Alloy Steel
    3/32"Not Rated0.0002"-0.0004" to 0"2,0000.67"1.08"DIN 6499-B, ISO 15488 Form B3215A201000000
     
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