FAQ

Can an ER20-4.5 collet clamp a 5.0 mm tool or workpiece?

Our ER20-4.5 collets have a capacity ranging in metric sizes from 3.6mm up to 4.5mm. These collets are suitable for various applications within this size range, ensuring precision and reliability. If you require clamping for a 5.0mm component, please visit our product page for our ER20-5.0 collets, specially designed to accommodate this specific size. For more detailed information, you can refer to our product page for comprehensive specifications and compatibility.

Can ER20-10 hold round bars and drill bits? What is the minimum clamping size?
The ER series is designed to securely hold round bars and can also accommodate drill bits. For ER20-10, the minimum clamping size is 9.1mm.

Moreover, ER series collets are versatile and can grip round bars effectively. If you have specific requirements for square, hexagonal, or other non-standard shapes, or if you need custom solutions, please feel free to contact us. We are here to meet your unique needs.

It's worth noting that the ER collet system is the most widely used collet system globally and is now readily available in the product portfolios of numerous companies worldwide, ensuring reliability and compatibility for various applications.
What delivery fees are involved ?
Orders with a total amount exceeding NT$5000 qualify for free delivery.
Orders with a total amount below NT$5000 will incur a delivery fee, which you will need to cover.
Please note that the total amount of the bill does not include tax and service charges.
Can I order other types of collets besides the ones listed in the catalog?
The catalog features standard products. If you require custom or special products, please visit the "Contact Us" page to fill out a form or send us an email. Let us know your requirements, and our technical team will conduct research and assessment. We will respond to your inquiry as soon as possible.
Does CT4L always have a hole in the middle? What is its function?
CT4L always features a central hole, which is integral for securely holding the clamping ends of the tool at the four corners.

These collets are often considered the optimal choice for manufacturers in terms of clamping devices. They typically consist of a main body and a threaded end where the nut screws onto the main shaft. Collets have a limited range of motion for clamping purposes, and depending on the project's requirements, multiple collets may be necessary to accommodate a specific range of bits.

If you're uncertain about selecting the right collet for your project, please don't hesitate to contact us. Our team is ready to assist you in making the appropriate choice.
What are the differences between ER20BL and ER20SG?
ER20BL is designed for high-speed steel drilling applications, ensuring that the drill remains securely in place without slipping, resulting in high-precision drilling.

On the other hand, ER20SG is intended for use as a milling cutter holder. Tool holders play a critical role in influencing the machining accuracy of machine tools and even the overall product quality. Therefore, they require an exceptionally high level of precision where even the tiniest margin of error is unacceptable.
What are the accuracy levels of ER collets series?
Our ER collets series adhere to strict precision standards, ensuring three distinct accuracy levels:

  • Normal Grade (0.02mm): Suitable for many general machining applications.
  • A Grade (0.01mm): Offers enhanced precision, ideal for more demanding machining tasks.
  • AA Grade (0.005mm): Provides the highest level of accuracy, perfect for precision-critical operations.
For optimal stability and performance, we recommend pairing AA Grade collets with HSP nuts. This combination guarantees the utmost precision in your machining processes.
Do you have an ER Coolant Collet?
Yes, we offer ER Coolant Collets featuring a clamping diameter range of 4.00 - 20.00 mm. These sealed collets with cooling holes can be used with standard milling cutters, saving on tooling costs, and extending cutting tool lifespan. Designed with water outlet holes, they can be easily installed into an ER-32 collet chuck or holder, providing a strong clamping force and accommodating a wide range of applications, including milling, drilling, reaming, and rigid tapping. Please contact us for specific size requirements beyond our standard selection.
What are the accuracy levels of SK and DC collet series?
Both the SK and DC collet series are rated as AA Grade, providing exceptional precision with an accuracy of 0.005mm. We do not offer alternative accuracy levels for these collets, as they are specifically engineered to deliver the highest level of precision for various machining needs.
Is the pricing consistent for products belonging to the same series?
Yes, the pricing remains uniform for products within the same series. Nevertheless, it's worth mentioning that there is a slight price increase for hole diameters under 2.5mm within the ER, SK, and DC series.
Is payment required before a product is shipped?
We generally require payment before shipping a product. However, if you have consistently placed orders for several consecutive months, you do have the option to apply for a switch to monthly settlement. This provides you with more flexibility in your payment process, making it more convenient for you.
what is different between clamping 1mm and 0.5mm of ER collets?
The difference between clamping 1mm and 0.5mm of ER collets lies in the range of tool diameters that each can effectively grip and the precision of the grip.

Clamping Range: ER collets are designed to hold cutting tools within a specified range of diameters. For example, an ER32 collet with a 1mm clamping range is intended to securely grip cutting tools with diameters that fall within that range. In this case, it can hold tools ranging from 1mm to 2mm in diameter. On the other hand, an ER32 collet with a 0.5mm clamping range is designed to hold tools within the 0.5mm to 1.5mm diameter range. So, the key difference is the range of tool diameters they can accommodate.

Precision: The collet's clamping range also affects the precision of the grip. A collet with a narrower clamping range, such as the 0.5mm example, can provide a more precise and snug fit for tools within that range. This precision is crucial in applications where tight tolerances and minimal runout (the degree to which a tool may wobble or deviate from its intended path when rotated) are essential. A 1mm clamping range collet will provide less precision but greater versatility in accommodating a wider range of tool diameters.

In summary, the main difference is the range of tool diameters each collet can hold effectively and the level of precision they offer within that range. The choice between a 1mm or 0.5mm clamping range ER collet depends on the specific machining requirements and the level of precision needed for the application.