What material are inner collets made from, and where are they used?

Pactools ER collets are made from high-grade spring steel, offering excellent hardness and flexibility. They are commonly used in milling, drilling, and tapping operations for precise tool holding.

How do I choose the correct inner collet size?

Select a collet size that matches your tool shank within a ±0.5 mm tolerance. Using a collet close to the shank diameter ensures a secure and accurate grip.

What is the lifespan of a collet, and how can I detect wear?

Collets typically last over 1000 cycles with regular use. Signs of wear include tool slippage or poor surface finish—if noticed, it's time to replace the collet.

What is the benefit of a coolant flush (jet spray) collet?

Jet spray collets provide direct coolant flow to the cutting area, improving chip removal and keeping the tool cooler during operation.

How should I maintain an inner collet?

After use, clean the collet with a mild solvent and apply light oil to prevent rust. Always store collets in a dry, clean environment.

Click to enlarge

200250HP | ER COLLETS

$35.00

Chicago, USA Stock -

Canada Stock -

ER32-1/16 - High-Precision Collet

Specification

Accuracy: High Precision - Accuracy below 10 microns

BoreSize: 1/16" Inch

Series: ER32

Delivery and Shipping

US Domestic Shipping Only: We ship exclusively within the United States using UPS as our primary carrier.
Processing Time: Orders are typically processed within 1–2 business days. Orders placed on weekends or holidays will be processed on the next business day.
Delivery Times: Delivery times vary based on the shipping method and destination (estimates are provided at checkout). Please note that carrier delays (e.g., weather or unforeseen issues) are beyond our control.
Costs & Methods: UPS Standard, Expedited, and Express methods are available. Shipping rates are calculated based on weight and destination at checkout.
Tracking & Support: Tracking information will be emailed once shipped. For tracking issues, errors, or damaged/lost packages, contact us at sales@pactoolsusa.com or 262-282-2456.

Description

Description

ER32-1/16 - High-Precision Collet

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.