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.
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.
| Collet Size | Grip Range | TIR (Total Indicated Runout) Accuracy | ID Tolerance | Max. Body Dia. | Overall Lg. | Specifications Met | Each | |
ER-8 | ||||||||
|---|---|---|---|---|---|---|---|---|
Hardened 52100 Alloy Steel | ||||||||
| 1/16" | 0.043"-0.063" | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N11 | 000000 |
| 3/32" | 0.054"-0.094" | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N12 | 00000 |
| 1/8" | 0.086"-0.125" | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N13 | 00000 |
| 3/16" | 0.148"-0.188" | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N14 | 00000 |
| 1mm | 0.5 mm-1 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N15 | 00000 |
| 1.5mm | 1 mm-1.5 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N16 | 00000 |
| 2mm | 1.5 mm-2 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N17 | 00000 |
| 3mm | 2.5 mm-3 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N18 | 00000 |
| 4mm | 3.5 mm-4 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N19 | 00000 |
| 5mm | 4.5 mm-5 mm | 0.0002" | -0.0004" to 0" | 0.33" | 0.51" | DIN 6499B, ISO 15488B | 9397N21 | 00000 |
ER Collet Sets
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.
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.
| No. of Pieces | Collet Sizes Included | TIR (Total Indicated Runout) Accuracy | ID Tolerance | Approximate Dia. Compression (Collet Size) | Max. Body Dia. | Overall Lg. | Container Type | Specifications Met | Each | |
ER-8 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Hardened 52100 Alloy Steel | ||||||||||
| 9 | 1 mm-5 mm (increments of 0.5 mm) | 0.0002" | -0.0004" to 0" | 1/64" | 0.33" | 0.51" | Wood Stand | DIN 6499B, ISO 15488B | 9411N22 | 0000000 |