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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-25 | ||||||||||
Hardened 52100 Alloy Steel | ||||||||||
| 1/16" | 0.043" to 0.062" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N101 | 000000 | ||
| 3/32" | 0.054" to 0.093" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N102 | 00000 | ||
| 1/8" | 0.086" to 0.125" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N103 | 00000 | ||
| 5/32" | 0.117" to 0.156" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N104 | 00000 | ||
| 3/16" | 0.148" to 0.187" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N105 | 00000 | ||
| 7/32" | 0.179" to 0.218" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N106 | 00000 | ||
| 1/4" | 0.211" to 0.250" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N107 | 00000 | ||
| 9/32" | 0.242" to 0.281" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N108 | 00000 | ||
| 5/16" | 0.273" to 0.312" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N109 | 00000 | ||
| 11/32" | 0.304" to 0.343" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N111 | 00000 | ||
| 3/8" | 0.336" to 0.375" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N112 | 00000 | ||
| 13/32" | 0.367" to 0.406" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N113 | 00000 | ||
| 7/16" | 0.398" to 0.437" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N114 | 00000 | ||
| 1/2" | 0.461" to 0.500" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N115 | 00000 | ||
| 5/8" | 0.586" to 0.625" | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N116 | 00000 | ||
| 2 mm | 1.5 mm to 2 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N117 | 00000 | ||
| 3 mm | 2 mm to 3 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N118 | 00000 | ||
| 4 mm | 3 mm to 4 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N119 | 00000 | ||
| 5 mm | 4 mm to 5 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N121 | 00000 | ||
| 6 mm | 5 mm to 6 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N122 | 00000 | ||
| 8 mm | 7 mm to 8 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N123 | 00000 | ||
| 12 mm | 11 mm to 12 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N124 | 00000 | ||
| 16 mm | 15 mm to 16 mm | 0.0002" | -0.0004" to 0" | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N125 | 00000 | ||
Hardened Chrome-Moly Steel | ||||||||||
| 1/16" | 0.043" to 0.063" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N11 | 00000 | ||
| 3/32" | 0.074" to 0.094" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N12 | 00000 | ||
| 1/8" | 0.105" to 0.125" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N13 | 00000 | ||
| 5/32" | 0.141" to 0.156" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N14 | 00000 | ||
| 3/16" | 0.148" to 0.188" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N15 | 00000 | ||
| 7/32" | 0.179" to 0.219" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N16 | 00000 | ||
| 1/4" | 0.211" to 0.250" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N17 | 00000 | ||
| 9/32" | 0.242" to 0.281" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N18 | 00000 | ||
| 5/16" | 0.273" to 0.313" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N19 | 00000 | ||
| 11/32" | 0.304" to 0.344" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N21 | 00000 | ||
| 3/8" | 0.336" to 0.375" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N22 | 00000 | ||
| 13/32" | 0.367" to 0.406" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N23 | 00000 | ||
| 7/16" | 0.398" to 0.438" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N24 | 00000 | ||
| 15/32" | 0.429" to 0.469" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N25 | 00000 | ||
| 1/2" | 0.461" to 0.500" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N26 | 00000 | ||
| 17/32" | 0.492" to 0.531" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N27 | 00000 | ||
| 9/16" | 0.523" to 0.563" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N28 | 00000 | ||
| 19/32" | 0.554" to 0.594" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N29 | 00000 | ||
| 5/8" | 0.586" to 0.625" | 0.0002" | -0.0001" to 0.0001" | 1.03" | 1.38" | DIN 6499-B, ISO 15488 Form B | 3669N31 | 00000 | ||
ER Collet Sets
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Collet Set with Wood Stand | Collet Set |
Keep a set of ER collets on hand to hold cutting tools for milling, drilling, and routing. They’re the most versatile and widely used type of collet. 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.
No. of Pieces | Collet Sizes Included | Total Indicated Runout (TIR) Accuracy | ID Tolerance | Approx. Dia. Compression (Collet Size) | Max. Body Dia. | Overall Lg. | Container Type | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ER-25 Collet | ||||||||||||
Hardened 52100 Alloy Steel | ||||||||||||
| 15 | 2 mm-16 mm (increments of 1 mm) | 0.0002" | -0.0004" to 0" | 1/64" (2 mm) 1/32" (3 mm to 16 mm) | 1.02" | 1.34" | Wood Stand | DIN 6499-B, ISO 15488 Form B | 9411N29 | 0000000 | ||
| 18 | 3/32"-5/8" (increments of 1/32") | 0.0002" | -0.0004" to 0" | 1/32" (3/32" to 5/8") | 1.02" | 1.34" | Wood Stand | DIN 6499-B, ISO 15488 Form B | 9411N31 | 000000 | ||
Hardened Chrome-Moly Steel | ||||||||||||
| 14 | 3 mm-16 mm (increments of 1 mm) | 0.0002" | -0.0001" to 0.0001" | 1/64" (3 mm to 4 mm) 1/32" (5 mm to 16 mm) | 1.03" | 1.38" | — | DIN 6499-B, ISO 15488 Form B | 9411N17 | 000000 | ||
| 19 | 1/16"-5/8" (increments of 1/32") | 0.0002" | -0.0001" to 0.0001" | 1/64" (1/16" to 5/32") 1/32" (3/16" to 5/8") | 1.03" | 1.38" | — | DIN 6499-B, ISO 15488 Form B | 9411N18 | 000000 | ||
ER Coolant Control Collets
|  |  |
Sealed Shown in Use | Angled Ports Shown in Use |
 |  |
Sealed | Angled Ports |
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.
Angled Ports Coolant Delivery Collet—Collets with angled ports direct coolant around, not through, the tool, so you get the benefit of coolant control without needing expensive tools with coolant holes.
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-25—Sealed | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N201 | 000000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N202 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N203 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N204 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N205 | 00000 | ||
| 1/2" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N206 | 00000 | ||
ER-25—Angled Ports | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N207 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N208 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N209 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N211 | 00000 | ||
| 1/2" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.02" | 1.34" | DIN 6499-B, ISO 15488 Form B | 3669N212 | 00000 | ||
ER Tap Collets
 |
 |
Hold square-shank taps in ER collet chucks and tap holders to create internal threads in workpieces. To hold taps tightly in place, these collets have spring slots that grip the round part of the shank and a square opening in the base that mates with the square end. They meet DIN and ISO dimensional standards.
These collets hold inch and metric taps that have shanks that meet ANSI standards. They will not work with taps that have shanks sized to ISO, DIN, or JIS standards.
52100 Alloy Steel—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.
Chrome-Moly Steel—Chrome-moly steel collets are more wear-resistant than 52100 alloy steel collets. They hold their shape better over time, which helps them keep a strong grip on taps. They also have lower runout, so your taps last up to 20% longer and create more accurate threads. Often used for high-volume production runs, they hold up to high-speed and high-force tapping in any material.
For Tap Size | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch | Metric | For Tap Pipe Size | For Shank Dia. | For Square Shank Size | Collet Size | Max. Body Dia. | Overall Lg. | Specs. Met | Each | |||
ER-25 Collet | ||||||||||||
52100 Alloy Steel—0.0004" Total Indicated Runout (TIR) Accuracy | ||||||||||||
| No. 0 to No. 6 | M1.6 to M3.5 | — | 0.141" | 0.11" | 9/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N31 | 000000 | ||
| 5/32" to No. 8 | M4 | — | 0.168" | 0.131" | 5/32" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N32 | 00000 | ||
| 3/16" to No. 10 | M4.5 to M5 | — | 0.194" | 0.152" | 3/16" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N33 | 00000 | ||
| No. 12 to 7/32" | — | — | 0.22" | 0.165" | 7/32" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N34 | 00000 | ||
| 1/4" | M6 to M6.5 | — | 0.255" | 0.191" | 1/4" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N35 | 00000 | ||
| 5/16" | M6.5 to M8 | — | 0.318" | 0.238" | 5/16" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N36 | 00000 | ||
| 3/8" | M10 | — | 0.381" | 0.286" | 3/8" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N37 | 00000 | ||
| 7/16" | — | — | 0.323" | 0.242" | 21/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N38 | 00000 | ||
| 1/2" | M12 to M12.5 | — | 0.367" | 0.275" | 23/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N39 | 00000 | ||
| 9/16" | M14 | — | 0.429" | 0.322" | 27/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N41 | 00000 | ||
| 5/8" | M16 | — | 0.48" | 0.36" | 31/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N43 | 00000 | ||
| 11/16" | M18 | — | 0.542" | 0.406" | 35/64" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N44 | 00000 | ||
| — | — | 1/8 | 0.437" | 0.328" | 7/16" | 1.02" | 1.34" | DIN 6499-A, ISO 15488 Form A | 9211N42 | 00000 | ||
Chrome-Moly Steel—0.0002" Total Indicated Runout (TIR) Accuracy | ||||||||||||
| 5/32" to No. 8 | M4 | — | 0.168" | 0.131" | 5/32" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N76 | 000000 | ||
| 3/16" to No. 10 | M4.5 to M5 | — | 0.194" | 0.152" | 3/16" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N77 | 000000 | ||
| No. 12 to 7/32" | — | — | 0.22" | 0.165" | 7/32" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N78 | 000000 | ||
| 1/4" | M6 to M6.5 | — | 0.255" | 0.191" | 1/4" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N79 | 000000 | ||
| 5/16" | M6.5 to M8 | — | 0.318" | 0.238" | 5/16" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N81 | 000000 | ||
| 3/8" | M10 | — | 0.381" | 0.275" | 3/8" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N82 | 000000 | ||
| 7/16" | — | — | 0.323" | 0.242" | 21/64" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N83 | 000000 | ||
| 1/2" | M12 to M12.5 | — | 0.367" | 0.275" | 23/64" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N84 | 000000 | ||
| 9/16" | M14 | — | 0.429" | 0.322" | 27/64" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N85 | 000000 | ||
| 5/8" | M16 | — | 0.48" | 0.36" | 31/64" | 1.02" | 1.38" | DIN 6499-A, ISO 15488 Form A | 9211N86 | 000000 | ||
