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.

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200465HP | ER COLLETS

$65.00

Chicago, USA Stock -

Canada Stock -

ER50-31.0mm-HP Collet

Specification

Accuracy - High Precision - Accuracy below 10 microns
BoreSize - 31.0mm
Series - ER50
Size - MM

Description

Description

ER50-31.0mm-HP Collet

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.