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ER COLLETS | COLLETS
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Accuracy
ER Collets from PAC Precision Tools are manufactured for high precision CNC machining applications. They provide excellent concentricity and secure clamping to ensure maximum tool holding performance.
- Standard Precision : -0.0006" (15 Micron) @4D
- High Precision : -0.0004" (10 Micron) @4D
- Ultra Precision : -0.0002" (5 Micron) @4D
Dimensions
| Collet Series | Reference # | A | B |
|---|---|---|---|
| ER8 | 4004E | 8.5mm (.335 in) | 13.5mm (.531 in) |
| ER11 | 4008E | 11.5mm (.453 in) | 18mm (.709 in) |
| ER16 | 426E | 17mm (.669 in) | 27.5mm (1.063 in) |
| ER20 | 428E | 21mm (.827 in) | 31.5mm (1.220 in) |
| ER25 | 430E | 26mm (1.024 in) | 34mm (1.378 in) |
| ER32 | 470E | 33mm (1.299 in) | 40mm (1.575 in) |
| ER40 | 472E | 41mm (1.614 in) | 46mm (1.811 in) |
| ER50 | 477E | 52mm (2.047 in) | 60mm (2.362 in) |
Features
- All PAC Collets are as per ISO-15488 / DIN 6499 standard
- Manufactured with SWISS Technology
- Crafted from high-quality Spring Steel
- Metric & Inch Sizes Available
- Fractional Collets manufactured specifically for USA market requirements
- 16 slot construction for rigid clamping and extra concentricity
- PAC Collets improve tool life, part finish and reduce spindle wear
- Suitable for drilling, milling, tapping and reaming
- Hardness: 44-46 HRC
- Corrosion Resistant Surface Finish
- Compatible with ER16 through ER50 collet chucks
- Rounded & deburred edges for guaranteed repeatability
Frequently Asked Questions
1. What are ER Collets?
ER Collets are precision tool-holding components used in CNC machines to grip drills, end mills, taps, and other cutting tools. They provide strong clamping, low runout, and excellent accuracy. As a precision tools supplier in the USA, PAC Precision Tools offers ER collets for reliable and stable machining.
2. Why are ER Collets commonly used in CNC machining?
ER Collets offer excellent flexibility because one collet can clamp multiple tool sizes within a specific range. They provide firm grip, high concentricity, and reduced vibration, improving cutting accuracy and tool life across many machining applications.
3. What sizes of ER Collets are available at PACTools?
ER Collets come in standard sizes such as ER8, ER11, ER16, ER20, ER25, ER32, ER40 and ER50. Each size holds tools within a specific diameter range, making them suitable for various machining tasks in job shops and production units.
4. Are ER Collets suitable for high-speed machining?
Yes, ER Collets are designed to maintain balance and precision at high RPM. When paired with a quality ER collet holder, they provide stable cutting, reduced runout, and improved surface finish even during high-speed operations.
5. How do I maintain ER Collets for long life?
Clean the collets regularly, remove chips and coolant residue, avoid overtightening, and store them in a dry place. Proper maintenance prevents wear, protects clamping accuracy, and keeps your tooling system performing well.
6. Can ER Collets hold different types of tools?
Yes, ER Collets can hold carbide tools, HSS drills, taps, reamers, engraving tools, and more. Their wide clamping range makes them one of the most versatile tool-holding solutions used in CNC machining.
7. How do I choose the right ER Collet for my CNC machine?
Select the collet size based on your tool diameter and your ER holder type. If you need help choosing the correct ER collet for your setup, PAC Precision Tools USA - a trusted CNC tools distributor in the USA - can guide you.
8. Need assistance selecting the correct ER Collets?
If you need more information and guidance in choosing the right ER Collets for your machining operations, you can contact us here +1 262-282-2456 or email us at sales@pactoolsusa.com.
Quick Link
- Tool Holders
- Collets
- Tool Holders Bushings
- Retention Knobs
- CNC Live/Dead Centers
- Other Accessories
- ER Collet Holders
- End Mill Holders
- Hydraulic Holders
- Face Mill Holders
- Shrink Fit Holders
- Tooling Packages
- Power Milling Holders
- ER Collets
- ER Steel Sealed Collets
- ER Jet Spray Coolant Collets
- SK Collets (Super Collets)
- Reduction Sleeves For Hydraulic Chuck
- Straight Collets For Milling Chucks
- Quick Change Tapping Adapters
- Boring Bar Sleeves
- CNC Dead Centers
- ER Wrench
- Tool Locking Device
