How are DNA collets different from standard ER collets?

Unlike standard ER collets (which typically offer 0.0005" or greater runout), DNA collets undergo fine grinding and individual inspection to achieve exceptional concentricity. This results in superior part finish, improved dimensional accuracy, and reduced wear on spindle bearings. Compare specs at pactoolsusa.com.

When should I use a DNA collet instead of a regular collet?

Use DNA collets in applications involving micro-milling, tight-tolerance boring, high-speed machining, or when you're working with expensive materials where precision is critical. They’re also ideal for finishing passes. Learn usage cases at pactoolsusa.com.

Are DNA Collets compatible with standard ER holders?

Yes, DNA collets are fully compatible with standard ER collet chucks and toolholders. No special adapters are required—just improved accuracy within the same ER system. Check compatibility at pactoolsusa.com.

How do I maintain the accuracy of DNA collets?

To preserve concentricity, always clean the collet and holder thoroughly before use. Avoid overtightening, rotate collets periodically for uniform wear, and store them in protective cases to prevent nicks. Detailed care tips are available at pactoolsusa.com.

Do DNA collets support coolant-through applications?

Some DNA collets are available in sealed or coolant-through configurations, allowing them to be used in high-speed, high-pressure coolant systems without compromising accuracy. Confirm specifications at pactoolsusa.com.

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210063DNA | DNA (DEAD NUTS ACCURATE) COLLETS

Q: What are DNA (Dead Nut Accurate) Collets?

DNA Collets are ultra-precision ER collets engineered for exceptional concentricity—typically within 0.0002" (5 microns) or better. They are ideal for high-precision machining, where tool runout must be minimized for tight tolerances and extended tool life. Discover more at pactoolsusa.com.

$28.00

Chicago, USA Stock -

Canada Stock -

ER20 DNA 3.0mm COLLETS

Specification

Series - ER20
Size - 3.0mm
Type - MM

Description

Description

ER20 DNA 3.0mm COLLETS

DNA Collets from a top Precision tool supplier in Wisconsin are designed from premium, hardened spring steel and precision-ground to deliver exceptional concentricity and minimal runout. These collets ensure superior tool holding accuracy for finishing and high-speed operations. PAC precision tools DNA collets provide unmatched stability, repeatability, and performance in demanding machining environments.

Features:

ccuracy: ≤ 3 Micron (0.0001” TIR) or better
Ultra-low runout for precision machining
Optimized slot geometry for balanced clamping pressure
High elasticity for consistent gripping performance
Compatible with standard ER collet systems (ER16 through ER40)
Series available: ER8 through ER40
Hardened and tempered spring steel construction
Precision-ground internal and external surfaces
Corrosion-resistant surface treatment for durability
DNA/RTX collets have a much shorter projection outside of the collet pocket
More rigid hold for small diameter tools and repeatable accuracy
Longer tool-life and superior tool performance!
DNA/RTX collets work in standard ER collet chucks - only a collet and nut required
METRIC & INCH sizes
Only the nominal size can be clamped

PAC Precision Tools DNA Collets are ideal for high-speed finishing, precision milling, drilling, and reaming operations. Made to improve surface finish, reduce vibration, and extend tool life, they provide superior performance where maximum accuracy is critical.

Frequently Asked Questions

1. What are DNA (Dead Nut Accurate) Collets, and how do they differ from standard ER collets? ▼

DNA collets are high-precision ER collets designed to achieve extremely low runout using a “dead nut” tightening principle. Unlike standard ER collets, the nut does not rotate against the collet during tightening, which reduces tool shift and improves accuracy. As a precision tools supplier in the USA, PAC Precision Tools offers DNA collets for ultra-accurate machining.

2. Which ER sizes are commonly available for DNA collets at PACTools? ▼

DNA collets are commonly available in ER8, ER16, ER20, ER25, ER32, and ER40 sizes. These sizes cover most precision machining needs and are suitable for small to medium tool diameters used in CNC operations.

3. How should DNA collets be maintained to ensure long-term performance? ▼

DNA collets should be cleaned after each use to remove chips and coolant residue. Avoid over-tightening, store them in a dry environment, and inspect them for wear regularly. Proper care helps maintain low runout and consistent clamping accuracy.

4. Which industries commonly rely on DNA collets for high-accuracy machining? ▼

Industries such as aerospace, medical device manufacturing, mold making, electronics, and precision engineering frequently use DNA collets. These industries require tight tolerances, superior surface finish, and repeatable accuracy in CNC machining.

5. What maintenance guidance does PACTools provide to customers for optimal performance? ▼

PACTools advises customers to keep collets clean, use correct torque settings, and avoid damaged tool shanks. Regular inspection and proper storage should also be emphasized. A CNC tools distributor in the USA that provides clear maintenance guidance helps customers achieve better results and longer collet life.

6. Are DNA collets suitable for high-speed machining applications? ▼

Yes, DNA collets are ideal for high-speed machining due to their low runout and stable clamping. They reduce vibration, improve surface finish, and extend tool life in high-RPM CNC operations.

7. Need help selecting DNA collets for your application? ▼

If you need any guidance in selecting DNA Collets for your CNC machining, you can contact us here at +1 262-282-2456 or email us at sales@pactoolsusa.com. PAC Precision Tools USA is a reliable CNC tools distributor in the USA and a precision tools supplier in the USA.