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ER Coolant Control Collets
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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.
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. Their maximum coolant pressure is higher than 52100 alloy steel collets, so they’re a better choice for deep-hole drilling and turning operations in CNC Swiss lathes.
Collet Size | Grip Range | Total Indicated Runout (TIR) Accuracy | ID Tolerance | Max. Coolant Pressure, psi | Max. Body Dia. | Overall Lg. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
ER-11—Sealed | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 1/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.45" | 0.71" | DIN 6499-B, ISO 15488 Form B | 4560N301 | 000000 | ||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.45" | 0.71" | DIN 6499-B, ISO 15488 Form B | 4560N302 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.45" | 0.71" | DIN 6499-B, ISO 15488 Form B | 4560N303 | 00000 | ||
ER-16—Sealed | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 3/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A201 | 00000 | ||
| 1/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A202 | 00000 | ||
| 5/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A203 | 00000 | ||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A204 | 00000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A205 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A206 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A207 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A208 | 00000 | ||
ER-16—Angled Ports | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 1/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A209 | 00000 | ||
| 5/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A211 | 00000 | ||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A212 | 00000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A213 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A214 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.67" | 1.08" | DIN 6499-B, ISO 15488 Form B | 3215A215 | 00000 | ||
ER-20—Sealed | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 1/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N201 | 00000 | ||
| 5/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N202 | 00000 | ||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N203 | 00000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N204 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N205 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N206 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N207 | 00000 | ||
| 1/2" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N208 | 00000 | ||
Hardened Chrome-Moly Steel | |||||||||||
| 3/16" | 0.183" to 0.188" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 0.83" | 1.22" | DIN 6499-B, ISO 15488 Form B | 1724N35 | 00000 | ||
| 1/4" | 0.230" to 0.250" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 0.83" | 1.22" | DIN 6499-B, ISO 15488 Form B | 1724N36 | 00000 | ||
| 3/8" | 0.355" to 0.375" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 0.83" | 1.22" | DIN 6499-B, ISO 15488 Form B | 1724N37 | 00000 | ||
| 1/2" | 0.480" to 0.500" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 0.83" | 1.22" | DIN 6499-B, ISO 15488 Form B | 1724N38 | 00000 | ||
ER-20—Angled Ports | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 1/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N209 | 00000 | ||
| 5/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N211 | 00000 | ||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N212 | 00000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N213 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N214 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N215 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 0.83" | 1.24" | DIN 6499-B, ISO 15488 Form B | 1724N216 | 00000 | ||
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 | 00000 | ||
| 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-32—Sealed | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 3/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A401 | 00000 | ||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A402 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A403 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A404 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A405 | 00000 | ||
| 1/2" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A406 | 00000 | ||
| 5/8" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A407 | 00000 | ||
| 3/4" | Not Rated | 0.0002" | -0.0004" to 0" | 2,000 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A408 | 00000 | ||
Hardened Chrome-Moly Steel | |||||||||||
| 1/4" | 0.246" to 0.250" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A147 | 00000 | ||
| 17/64" | 0.262" to 0.266" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A148 | 00000 | ||
| 19/64" | 0.293" to 0.297" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A151 | 00000 | ||
| 5/16" | 0.308" to 0.313" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A152 | 00000 | ||
| 21/64" | 0.308" to 0.328" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A153 | 00000 | ||
| 11/32" | 0.324" to 0.344" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A154 | 00000 | ||
| 3/8" | 0.355" to 0.375" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A156 | 00000 | ||
| 25/64" | 0.371" to 0.391" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A157 | 00000 | ||
| 13/32" | 0.387" to 0.406" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A158 | 00000 | ||
| 7/16" | 0.418" to 0.438" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A159 | 00000 | ||
| 29/64" | 0.433" to 0.453" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A161 | 00000 | ||
| 15/32" | 0.449" to 0.469" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A162 | 00000 | ||
| 31/64" | 0.465" to 0.484" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A163 | 00000 | ||
| 1/2" | 0.480" to 0.500" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A164 | 00000 | ||
| 33/64" | 0.496" to 0.516" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A165 | 00000 | ||
| 9/16" | 0.543" to 0.563" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A168 | 00000 | ||
| 5/8" | 0.605" to 0.625" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A173 | 00000 | ||
| 41/64" | 0.621" to 0.641" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A174 | 00000 | ||
| 3/4" | 0.730" to 0.750" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A182 | 00000 | ||
| 49/64" | 0.746" to 0.766" | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A183 | 00000 | ||
| 10 mm | 9.5 mm to 10 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A185 | 00000 | ||
| 10.5 mm | 10 mm to 10.5 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A186 | 00000 | ||
| 11 mm | 10.5 mm to 11 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A187 | 00000 | ||
| 12 mm | 11.5 mm to 12 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A189 | 00000 | ||
| 13.5 mm | 13 mm to 13.5 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A193 | 00000 | ||
| 14 mm | 13.5 mm to 14 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A194 | 00000 | ||
| 20 mm | 19.5 mm to 20 mm | 0.0002" | -0.0001" to 0.0001" | 2,900 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A207 | 00000 | ||
ER-32—Angled Ports | |||||||||||
Hardened 52100 Alloy Steel | |||||||||||
| 7/32" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A409 | 00000 | ||
| 1/4" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A411 | 00000 | ||
| 5/16" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A412 | 00000 | ||
| 3/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A413 | 00000 | ||
| 1/2" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A414 | 00000 | ||
| 5/8" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A415 | 00000 | ||
| 3/4" | Not Rated | 0.0002" | -0.0004" to 0" | 1,400 | 1.3" | 1.57" | DIN 6499-B, ISO 15488 Form B | 3321A416 | 00000 | ||
CAT Taper Retention Knobs with Coolant Hole
 |
 |  |
Knob | Knob with Pilot |
Lock tool holders in place on CNC machines with a through-spindle coolant (TSC) system. They fit machines with a CAT taper spindle. All meet industrial standards for tensile and shear strength. Also known as pull studs. Use a torque wrench with a retention knob socket or a changeable-head torque wrench to tighten them.
To ensure compatibility with your machine, compare the features on these knobs, such as the location of O-ring seals and the pilot design, to those on your current knob.
Knobs with a pilot ensure precise alignment between the tool holder and spindle, reducing vibration and runout. To upgrade a standard knob to one with a pilot, confirm that the pilot diameter is small enough to fit in your tool holder without touching the inner walls where the knob seats.
Flange O-Ring Included—Knobs with flange O-rings block external coolant from entering your machine spindle. Match the O-ring placement and style to your current setup to ensure optimal sealing and performance.
Ground Face—Knobs with a ground face have a tighter seal than those without one, which helps prevent coolant leaks.
Grip Angle—Grip angle is the sloped part of the knob that the machine grips to secure the tool holder. A 15˚ grip angle is sometimes referred to as a 75˚ grip angle. A 30˚ grip angle is sometimes referred to as a 60˚ grip angle.
Grip Angle | Projection | Head Dia. | Coolant Hole Diameter | Pilot Dia. | Collar Dia. | Head-to-Flange Lg. | Flange Thk. | Torque Range, ft·lbf | O-Rings Included | Features | Mfr. | Mfr. Model No. | Mfr. Equiv. Model No. | Specs. Met | JIS Specification | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CAT 30 Machine Taper | |||||||||||||||||||
1/2"-13 | |||||||||||||||||||
| 45° | 0.46" | 0.52" | 0.187" | — | 0.39" | 0.32" | 0.1" | 20 to 25 | — | — | T.J. Davies | PSC-575 | 30TRKC, 111-11, 11111, C30-STDH, RC2E-0001-C | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N54 | 000000 | ||
| 45° | 0.46" | 0.52" | 0.187" | 0.492" | 0.39" | 0.32" | 0.1" | 20 to 25 | — | — | T.J. Davies | PSCP-575 | — | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N55 | 00000 | ||
CAT 40 Machine Taper | |||||||||||||||||||
5/8"-11 | |||||||||||||||||||
| 15° | 1.023" | 0.746" | 0.264" | 0.64" | 0.49" | 0.787" | 0.157" | 45 to 55 | — | — | T.J. Davies | PSC-470X15 | 711-23, 4030TRK, 21006-15-C, 71123, C40-1500 ISOH, HPS-806U-1, RS4E-0114-C | ISO 7388-3 | JIS B 6339 | 9499N21 | 00000 | ||
| 15° | 1.023" | 0.746" | 0.265" | — | 0.49" | 0.787" | 0.157" | 45 to 55 | Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-470X15 | 711-22, 71122 | ISO 7388-3 | JIS B 6339 | 9499N22 | 00000 | ||
| 15° | 1.024" | 0.746" | 0.236" | 0.64" | 0.49" | 0.787" | 0.157" | 45 to 55 | — | — | T.J. Davies | PSC-572X15 MATS | 40PCMGH, 510-23, 51023, RS4E-0209C | ISO 7388-3 | JIS B 6339 | 9499N49 | 00000 | ||
| 15° | 1.024" | 0.747" | 0.236" | 0.64" | 0.49" | 0.787" | 0.157" | 45 to 55 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-470X15A | 750-22-A, 21148-C, 75022A, HPS-806U-2, PMO40CMG, RS4E-0114-H | ISO 7388-3 | JIS B 6339 | 9499N23 | 00000 | ||
| 15° | 1.024" | 0.748" | 0.276" | — | 0.512" | 0.787" | 0.157" | 65 to 85 | — | Ground Face | Lyndex Nikken | C40-1500-MATS-EU | — | ASME B5.50 | — | 9499N11 | 00000 | ||
| 15° | 1.03" | 0.746" | 0.264" | — | 0.49" | 0.792" | 0.163" | 45 to 55 | — | — | T.J. Davies | PSC-572X15 | 21117-C | ISO 7388-3 | JIS B 6339 | 9499N48 | 00000 | ||
| 15° | 1.03" | 0.746" | 0.264" | — | 0.49" | 0.792" | 0.275" | 45 to 55 | Flange O-Ring | — | T.J. Davies | PSC-532X15 | 316-17, 4008TRKC, 21107-15C, 31617, C40-1500H, HPS-806U-1, RS4E-0212-C | ISO 7388-3 | JIS B 6339 | 9499N31 | 00000 | ||
| 15° | 1.03" | 0.746" | 0.264" | 0.64" | 0.49" | 0.792" | 0.236" | 45 to 55 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-532X15A | C40-1500 MORI, HPS-C40-MORI-CO, PS-381E | ISO 7388-3 | JIS B 6339 | 9499N32 | 00000 | ||
| 15° | 1.03" | 0.748" | 0.276" | — | 0.512" | 0.793" | 0.276" | 44 to 59 | Flange O-Ring | Ground Face | Lyndex Nikken | C40-1500-EU | — | ASME B5.50 | — | 4403N11 | 00000 | ||
| 30° | 1.266" | 0.588" | 0.166" | — | 0.49" | 0.988" | 0.12" | 45 to 55 | — | — | T.J. Davies | PSC-572X60 | 21119-C, C40-6000H, RB4E-0002-C | ISO 7388-3 | JIS B 6339 | 9499N53 | 00000 | ||
| 30° | 1.266" | 0.588" | 0.166" | — | 0.49" | 0.988" | 0.236" | 45 to 55 | — | — | T.J. Davies | PSC-532X60 | 318-14A, 4014TRKC, 21003-60C, 31814A, C40S-6000H, HPS-026C, P40T-2CH, RB4E-0002-C | ISO 7388-3 | JIS B 6339 | 9499N35 | 00000 | ||
| 30° | 1.266" | 0.591" | 0.177" | — | 0.512" | 0.99" | 0.124" | 65 to 85 | — | Ground Face | Lyndex Nikken | C40-6000(H)-EU | — | ASME B5.50 | — | 9499N12 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.157" | 0.64" | 0.49" | 0.44" | 0.12" | 45 to 55 | Flange O-Ring | — | T.J. Davies | PSC-471 | 21127-C, HPS-B64-1, PYN40CMG | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N24 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.157" | 0.64" | 0.49" | 0.44" | 0.12" | 45 to 55 | Flange O-Ring | — | T.J. Davies | PSC-473 | 327-16, 21128-C, 32716 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N26 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.157" | 0.64" | 0.49" | 0.44" | 0.12" | 45 to 55 | Flange O-Ring | Ground Face | T.J. Davies | PSCG-471 | — | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N25 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.264" | — | 0.49" | 0.44" | 0.12" | 45 to 55 | — | — | T.J. Davies | PSC-475 | 111-22, 11122, 21003-C, C40-STDH, HPS-D72, P-40TRK, PYN40C, RC4E-0001 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N28 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.264" | 0.64" | 0.49" | 0.44" | 0.12" | 45 to 55 | — | — | T.J. Davies | PSC-474 | 312-26, 21104-C, 31226, C40-STDH, HPS-G53, P40TRK, PYN40C, RS4E-0211-C | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N27 | 00000 | ||
| 45° | 0.64" | 0.74" | 0.276" | — | 0.512" | 0.433" | 0.12" | 44 to 59 | — | Ground Face | Lyndex Nikken | C40-STD | — | ASME B5.50 | — | 4403N24 | 00000 | ||
| 45° | 1.266" | 0.588" | 0.166" | — | 0.49" | 0.988" | 0.12" | 45 to 55 | — | — | T.J. Davies | PSC-572X45 | 510-23, 21118-C, 51023, C40-4500H, RB4E-0001-C | ISO 7388-3 | JIS B 6339 | 9499N51 | 00000 | ||
| 45° | 1.266" | 0.588" | 0.166" | — | 0.49" | 0.988" | 0.236" | 45 to 55 | — | — | T.J. Davies | PSC-532X45 | 315-14, 4009TRKC, 21003-45C, 31514, C40S-4500H, HPS-072C, RS4E-0221-C | ISO 7388-3 | JIS B 6339 | 9499N33 | 00000 | ||
| 45° | 1.266" | 0.588" | 0.187" | 0.64" | 0.49" | 0.988" | 0.236" | 45 to 55 | — | — | T.J. Davies | PSCP-532X45 | MAS PT 1 403-1973 | ISO 7388-3 | JIS B 6339 | 9499N34 | 00000 | ||
| 45° | 1.266" | 0.591" | 0.177" | — | 0.512" | 0.99" | 0.236" | 44 to 59 | — | Ground Face | Lyndex Nikken | C40S-4500(H) | — | ASME B5.50 | JIS B 6339 | 4403N17 | 00000 | ||
| 45° | 1.268" | 0.588" | 0.118" | 0.64" | 0.49" | 0.99" | 0.126" | 45 to 55 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSC-572X45 HITA | 321-30, 32130, C40-HITACHI, PS-H27 | ISO 7388-3 | JIS B 6339 | 9499N52 | 00000 | ||
| 90° | 1.266" | 0.588" | 0.166" | — | 0.49" | 0.988" | 0.236" | 45 to 55 | — | — | T.J. Davies | PSC-532X90 | 350-30, 4001TRKC, 21003-90C, 35030, C40S-9000H, HPS-014C, HPS-C40-MAS-90-C, RB4E-0003-C | ISO 7388-3 | JIS B 6339 | 9499N36 | 00000 | ||
M16 × 2 mm | |||||||||||||||||||
| 45° | 0.64" | 0.74" | 0.264" | — | 0.49" | 0.44" | 0.12" | 45 to 55 | — | — | T.J. Davies | PSC-478 | 17836, A40TRK, B40-STDH, RS4M-0105 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N29 | 00000 | ||
CAT 50 Machine Taper | |||||||||||||||||||
1"-8 | |||||||||||||||||||
| 15° | 1.344" | 1.1" | 0.39" | — | 0.82" | 1" | 0.275" | 75 to 90 | — | — | T.J. Davies | PSC-271X15 | 21100-C, C50-1500H | ISO 7388-3 | JIS B 6339 | 9499N15 | 00000 | ||
| 15° | 1.344" | 1.102" | 0.39" | — | 0.82" | 0.984" | 0.197" | 75 to 90 | — | — | T.J. Davies | PSC-270X15 | 711-45, 5030TRKC, 21008-15C, 71145, HP-711-45, RS6E-0114-C | ISO 7388-3 | JIS B 6339 | 9499N14 | 00000 | ||
| 30° | 1.772" | 0.904" | 0.232" | 1.023" | 0.825" | 1.376" | 0.394" | 75 to 90 | Flange O-Ring | Ground Face | T.J. Davies | PSCG-535X60 | C50-OKUMA-OH | ISO 7388-3 | JIS B 6339 | 9499N42 | 00000 | ||
| 30° | 1.772" | 0.904" | 0.232" | 1.023" | 0.825" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring | — | T.J. Davies | PSC-535X60 | 327-49, 21133-C, 32749, C50 MAKINO, RS6E-0242-H | ISO 7388-3 | JIS B 6339 | 9499N41 | 00000 | ||
| 30° | 1.772" | 0.906" | 0.236" | 1.024" | 1.024" | 1.378" | 0.39" | 85 to 110 | Flange O-Ring | Ground Face | Lyndex Nikken | PS-B61 | — | — | JIS B 6339 | 4403N39 | 00000 | ||
| 30° | 1.78" | 0.906" | 0.236" | — | 0.827" | 1.386" | 0.394" | 85 to 110 | — | Ground Face | Lyndex Nikken | C50-6000(H)-EU | — | ASME B5.50 | — | 9499N13 | 00000 | ||
| 45° | 1" | 1.14" | 0.39" | — | 0.825" | 0.7" | 0.2" | 75 to 90 | — | — | T.J. Davies | PSC-273 | 21142-C, HPS-C50-MAZAK-C | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N16 | 00000 | ||
| 45° | 1" | 1.14" | 0.39" | 1.03" | 0.825" | 0.7" | 0.2" | 75 to 90 | Head O-Ring in Coolant Hole | — | T.J. Davies | PSC-274 | 312-46, 31246, HPS-C50-MAZAK-COF, HPS-G43, M50TRK, PYN50C, RS6E-0204-C | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N17 | 00000 | ||
| 45° | 1" | 1.14" | 0.433" | — | 0.82" | 0.7" | 0.2" | 75 to 90 | Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-275 | 50TRKC-OR, 719-46, 71946 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N19 | 00000 | ||
| 45° | 1" | 1.14" | 0.453" | — | 0.82" | 0.7" | 0.2" | 75 to 90 | — | — | T.J. Davies | PSC-275 | 50TRK, 111-44, 11144, 21005-C, C50-STDH, HPS-C50-ANSI-C, HPS-D92, RC6E-0001 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9499N18 | 00000 | ||
| 45° | 1.778" | 0.904" | 0.264" | 0.985" | 0.825" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring | — | T.J. Davies | PSC-535X45 | 21132-C, MAKO50TRK-MF, RS6E-0232-H | ISO 7388-3 | JIS B 6339 | 9499N37 | 00000 | ||
| 45° | 1.778" | 0.904" | 0.264" | 0.985" | 0.825" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring | Ground Face | T.J. Davies | PSCG-535X45 | — | ISO 7388-3 | JIS B 6339 | 9499N38 | 00000 | ||
| 45° | 1.778" | 0.904" | 0.264" | 1.03" | 0.825" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-535X45 | — | ISO 7388-3 | JIS B 6339 | 9499N39 | 00000 | ||
| 45° | 1.778" | 0.904" | 0.309" | 1.03" | 0.825" | 1.384" | 0.394" | 75 to 90 | — | — | T.J. Davies | PSC-536X45 | 316-45, 5005TRKC, 21109-C, 31645, C50-4500 H, HPS-54C, HPS-C50-MAS-45 C, P50T-1CH, RB6E-0001-C | ISO 7388-3 | JIS B 6339 | 9499N44 | 00000 | ||
| 45° | 1.78" | 0.904" | 0.232" | 1.03" | 0.82" | 1.384" | 0.394" | 75 to 90 | Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-536X45 | 329-45, 32945 | ISO 7388-3 | JIS B 6339 | 9499N45 | 00000 | ||
| 45° | 1.78" | 0.906" | 0.236" | — | 0.827" | 1.386" | 0.39" | 85 to 110 | — | Ground Face | Lyndex Nikken | C50-4500(H)-EU | — | ASME B5.50 | — | 4403N29 | 00000 | ||
| 90° | 1.778" | 0.904" | 0.309" | 1.03" | 0.825" | 1.384" | 0.394" | 75 to 90 | — | — | T.J. Davies | PSC-536X90 | 342-18B, 5001TRKC, 21111-C, C50-9000 H, HPS-C50-MAS-90 C, HPS-O19C, RB6E-0003-C | ISO 7388-3 | JIS B 6339 | 9499N46 | 00000 | ||
| 90° | 1.778" | 0.904" | 0.312" | — | 0.83" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSC-540X90 | C50-9000 MORI EU | ISO 7388-3 | JIS B 6339 | 9499N47 | 00000 | ||
| 90° | 1.778" | 0.904" | 0.315" | 1.03" | 0.825" | 1.384" | 0.394" | 75 to 90 | Flange O-Ring, Head O-Ring in Coolant Hole | — | T.J. Davies | PSCO-535X90 | 342-75, 34275, C50-9000-MORI-EU, POM50CH1 | ISO 7388-3 | JIS B 6339 | 9499N43 | 00000 | ||
CAT 60 Machine Taper | |||||||||||||||||||
1 1/4"-7 | |||||||||||||||||||
| 45° | 1.5" | 1.46" | 0.5" | — | 1.045" | 1.08" | 0.3" | 75 to 90 | — | — | T.J. Davies | PSC-740X45 | 60TRK, 111-55, 11155 | ISO 7388-3 | JIS B 6339 | 9499N56 | 00000 | ||
| 45° | 1.5" | 1.46" | 0.5" | 1.281" | 1.045" | 1.08" | 0.3" | 75 to 90 | — | — | T.J. Davies | PSCP-740X45 | 60TRK, 111-55, 11155, RK60CV | ISO 7388-3 | JIS B 6339 | 9499N57 | 00000 | ||
BT Taper Retention Knobs with Coolant Hole
 |  |
Knob with Pilot |
Lock tool holders in place on CNC machines with a through-spindle coolant (TSC) system. They fit machines with a BT taper spindle. All meet industrial standards for tensile and shear strength. Also known as pull studs. These knobs have a pilot, which ensures precise alignment between the tool holder and spindle, reducing vibration and runout. To ensure compatibility with your machine, compare the features on these knobs, such as the location of O-ring seals and the pilot design, to those on your current knob. To upgrade a standard knob to one with a pilot, confirm that the pilot diameter is small enough to fit in your tool holder without touching the inner walls where the knob seats.
Use a torque wrench with a retention knob socket or a changeable-head torque wrench to tighten them.
Flange O-Ring Included—Knobs with flange O-rings block external coolant from entering your machine spindle. Match the O-ring placement and style to your current setup to ensure optimal sealing and performance.
Grip Angle—Grip angle is the sloped part of the knob that the machine grips to secure the tool holder. A 15˚ grip angle is sometimes referred to as a 75˚ grip angle. A 30˚ grip angle is sometimes referred to as a 60˚ grip angle.
Grip Angle | Projection | Head Dia. | Coolant Hole Diameter | Pilot Dia. | Collar Dia. | Head-to-Flange Lg. | Flange Thk. | Torque Range, ft·lbf | O-Rings Included | Mfr. | Mfr. Model No. | Mfr. Equiv. Model No. | Specs. Met | JIS Specification | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BT 30 Machine Taper | ||||||||||||||||||
M12 × 1.75 mm | ||||||||||||||||||
| 15° | 0.921" | 0.471" | 0.157" | 0.492" | 0.372" | 0.724" | 0.197" | 25 to 30 | — | T.J. Davies | PSC-344X15 | 30PMG, 326-21, 21144-C, HPS-B30-Kitamua-C, RS2M-0207-C | ISO 7388-3 | JIS B 6339 | 9487N11 | 000000 | ||
| 30° | 0.905" | 0.431" | 0.125" | 0.492" | 0.372" | 0.707" | 0.197" | 25 to 30 | — | T.J. Davies | PSC-585X60 | 3004TRKC, 21134-C, B30-6000H, HPS-17C, HPS-B30-MAS-60 C | ISO 7388-3 | JIS B 6339 | 9487N14 | 00000 | ||
| 45° | 0.905" | 0.431" | 0.125" | 0.492" | 0.372" | 0.707" | 0.197" | 25 to 30 | — | T.J. Davies | PSC-585X45 | 3003TRKC, 17817, B30-4500H, HPS-B30-MAS-45 C, P30T-2MGH, PS-130E, RB2M-0001-C | ISO 7388-3 | JIS B 6339 | 9487N13 | 00000 | ||
BT 40 Machine Taper | ||||||||||||||||||
M16 × 2 mm | ||||||||||||||||||
| 15° | 1.136" | 0.746" | 0.264" | 0.669" | 0.505" | 0.9" | 0.157" | 45 to 55 | — | T.J. Davies | PSC-480X15 | 711-22, 21130-C, 71122, DIN40ATRK, RS4M-0114-C | ISO 7388-3 | JIS B 6339 | 9487N16 | 00000 | ||
| 15° | 1.136" | 0.746" | 0.264" | 0.669" | 0.505" | 0.9" | 0.157" | 45 to 55 | Flange O-Ring, Head O-Ring in Coolant Hole | T.J. Davies | PSCO-480X15A | B40-1500 Mori EU, HPS-366E-1 | ISO 7388-3 | JIS B 6339 | 9487N15 | 00000 | ||
| 15° | 1.141" | 0.746" | 0.264" | 0.669" | 0.505" | 0.905" | 0.275" | 45 to 55 | — | T.J. Davies | PSC-444X15 | 40PH, 329-13, 21101-C, 32913, B40-1500 H, HPS-806-1, RS4M-0205-C | ISO 7388-3 | JIS B 6339 | 9487N17 | 00000 | ||
| 30° | 1.378" | 0.588" | 0.166" | 0.669" | 0.505" | 1.1" | 0.236" | 45 to 55 | — | T.J. Davies | PSC-444X60 | 311-13E, 4004TRKC, 17820, 31113E, B40-6000 H, HPS-2 C, RB4M-0002-C | — | JIS B 6339 | 9487N22 | 00000 | ||
| 45° | 0.752" | 0.74" | 0.264" | 0.669" | 0.505" | 0.552" | 0.120" | 45 to 55 | — | T.J. Davies | PSC-479 | 312-25, 21129-C, 31225, HPS-G51, MZ40TRKC, PS-G51 | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9487N18 | 00000 | ||
| 45° | 0.752" | 0.74" | 0.264" | 0.669" | 0.505" | 0.552" | 0.236" | 45 to 55 | — | T.J. Davies | PSC-477 | 111-26A, 11126A, 21105-C, B40-FADAL C, F40TRKC, RS4M-0115-C | ASME B5.50, ISO 7388-3 | JIS B 6339 | 9487N19 | 00000 | ||
| 45° | 1.378" | 0.588" | 0.166" | 0.669" | 0.505" | 1.1" | 0.236" | 45 to 55 | — | T.J. Davies | PSC-444X45 | 311-13D, 4003TRKC, 17818, 31113D, B40-4500 H, HPS-1C, RB4M-0001-C | — | JIS B 6339 | 9487N21 | 00000 | ||
| 90° | 1.378" | 0.588" | 0.166" | 0.669" | 0.505" | 1.1" | 0.236" | 45 to 55 | — | T.J. Davies | PSC-444X90 | 311-13F, 4002TRKC, 17822, 31113F, B40-9000 H, HPS-08 C, RB4M-0003-C | — | JIS B 6339 | 9487N23 | 00000 | ||
BT 50 Machine Taper | ||||||||||||||||||
M24 × 3 mm | ||||||||||||||||||
| 30° | 1.77" | 0.906" | 0.276" | 0.984" | 0.787" | 1.378" | 0.394" | 85 to 110 | — | Lyndex Nikken | B50-6000(H)-EU | — | — | JIS B 6339 | 9487N26 | 00000 | ||
| 45° | 1.772" | 0.904" | 0.232" | 0.984" | 0.78" | 1.376" | 0.394" | 75 to 90 | Flange O-Ring, Head O-Ring in Coolant Hole | T.J. Davies | PSC-446X45 TOY | P50T-1H4 | — | JIS B 6339 | 9487N24 | 00000 | ||
| 45° | 1.772" | 0.904" | 0.309" | 0.984" | 0.78" | 1.376" | 0.394" | 75 to 90 | — | T.J. Davies | PSC-446X45 | 5003TRKC, 21140-C, 31643, B50-4500H, HPS-5 C, P50T-1H, RB6M-0001-C | — | JIS B 6339 | 9487N25 | 00000 | ||
