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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
- ER Collet Holder
- ER Collet Holders-CAT Taper
- ER Collet Holders-CAT(DCAT) Dual-contact
- ER Collet Holders-BT Taper
- ER Collet Holders-BT(DBT) Dual-contact
- ER Collet Holders-HSK Taper
- ER Collet Holder - HSK Coolant Tube
- End Mill Holders
- End Mill Holders - CAT Taper
- End Mill Holders-CAT(DCAT)Dual-contact
- End Mill Holders-BT Taper
- End Mill Holder-BT(DBT)Dual-contact
- End Mill Holder-HSK Taper
- End Mill Holders-Set Screw And HSK Coolant Tube
- Shrink Fit Holders
- Shrink Fit Holder-CAT Taper
- Shrink Fit Holder-CAT(DCAT)Dual-contact
- Shrink Fit Holder - BT Taper
- Shrink Fit Holder - HSK Taper
- Face Mill Holders
- Face Mill Holders-CAT Taper
- Face Mill Holders-CAT(DCAT)Dual-contact
- Face Mill Holders-BT Taper
- Face Mill Holders-BT(DBT)Dual-contact
- Face Mill Holders-HSK Taper
- Face Mill Holders-Lock Screw and HSK Coolant tube
- Hydraulic Holders
- Hydraulic Holders-CAT Taper
- Hydraulic Holders-BT Taper
- Hydraulic Holders-HSK Taper
- Power Milling Holders
- Power Milling Holders-CAT Taper
- Power Milling Holders-CAT(DCAT)Dual-contact
- Power Milling Holders-BT Taper
- Power Milling Holders-BT(DBT)Dual-contact
- Power Milling Holders-HSK Taper
- Quick Change Tapping Holders
- Quick Change Tapping Holders-CAT Taper
- Quick Change Tapping Holders-BT Holder
- Quick Change Tapping Holders-HSK Taper
- ER Straight Shank Holders
- ER Straight Shank Holders-Single Ended
- ER Straight Shank Holders-Double Ended
- Collets
- ER Collets
- ER Steel Sealed Collets
- ER External Coolan Collet(Jet Spray)
- ER Tap Collets
- ER Tap Steel Sealed Collets
- Reduction Sleeves for Hudraulic Chuck
- ER Floating Tap Collet
- DNA(Dead Nuts Accurate) Collets
- SK Collets
- DA Collets
- DA Sealed Collets
- TG Collets
- TG Sealed Collets
- TG Tap Collets
- OZ(EOC) Collets
- Straight Collets for Milling Chucks
- Quick Change Tapping Adapters(Collets)
- R8 Collets
- 5C Collets
- 16C Collets
- 3J Collets
- Tool Holders Bushings
- Type-C Bushings
- Type-CS Bushings
- Type-Z Bushings
- Type-J Bushings
- Type-B Bushings
- Boring Bar Sleeves
- Retention Knobs
- CAT Retention Knobs
- BT Retention Knobs
- CNC Live/Dead Centers
- CNC Heavy Duty Live Centers
- Interchangeble Heavy Duty Centers
- CNC Small Casing Centers
- Slimline Medium Duty CNC Live Centers
- Dead Centers
- Other Accessories
- ER Nut
- ER Wrench
- Tool Locking Device
- Spindle Wiper
- HSK Coolant Tube
