# Collet FORTIS ER40 FI 25 - 24 DIN6499, ER40 milling/chuck collet for 25 mm shank

**URL:** https://aio.lv/en/product--fortis-0642176189307--12382032
**Data updated:** 2026-04-26 20:54 (EEST)
**Category:** Power Tools Accessories
**Manufacturer:** FORTIS
**Manufacturer code:** 0642176189307
**EAN:** 5905555224237
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 21.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 17.76 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fortis-0642176189307--12382032

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

FORTIS ER40 FI 25 - 24 DIN6499 is an ER40 series collet designed to clamp 25 mm diameter shanks or tools. Manufactured to DIN 6499 standard, this collet provides precise concentricity and reliable tool retention for milling, drilling, and CNC machining. Suitable for toolholders and chucks compatible with ER40 systems in metalworking and workshop applications.

## Long description

FORTIS ER40 FI 25 - 24 DIN6499 is an ER40 series collet designed to clamp 25 mm diameter shanks or tools. Manufactured to the DIN 6499 specification, this collet offers precise concentricity and stable retention for milling, drilling and CNC machining operations. The collet fits standard ER40 toolholders and chucks, making it suitable for use in metalworking shops and production environments where secure and repeatable tool clamping is required.
Advantages
The collet provides consistent radial accuracy and balanced clamping force across the 25 mm shank, reducing runout and improving surface finish. Its compliance with DIN 6499 ensures dimensional compatibility with ER40 systems and simplifies tool changes. The solid construction offers wear resistance and long service life under normal machining conditions, while the design supports secure gripping of cylindrical shanks without additional adapters.
Suitable for
Clamping 25 mm diameter end mills, drills and reamers in ER40 toolholders
CNC milling and drilling operations requiring repeatable concentricity
Bench and production lathes or milling machines with ER40 collet chucks
Workshop applications where quick tool changes and reliable retention are needed
When it may not be suitable
This collet is intended specifically for cylindrical shanks with a nominal diameter of 25 mm. It is not suitable for non-cylindrical tool shanks, tapered tooling, or applications that require integrated coolant through the spindle if the collet design does not support it. For jobs requiring tool-holding standards other than ER40 or for larger/smaller diameters, a different collet size or system will be necessary.
Key specifications
Series: ER40
Clamping diameter: 25 mm (nominal)
Standard: DIN 6499
Material: hardened steel (manufacturing standard material for ER collets)
Application: milling, drilling, CNC machining
How to use
Insert the 25 mm tool shank into the collet and assemble the collet into a compatible ER40 nut and holder according to the toolholder manufacturer’s instructions. Tighten the nut to the recommended torque to achieve secure clamping and correct concentricity. For repeatable results, ensure the tool shank and collet contact surfaces are clean and free of chips or contamination before assembly. Regularly inspect the collet for wear and replace if deformation or excessive runout is detected.
What to consider before purchase
Verify that your toolholder or chuck accepts ER40 collets and supports a 25 mm clamping diameter.
Confirm the required concentricity and runout tolerances for your machining tasks.
Check material and hardness requirements based on the tooling and operational loads.
Usage recommendations
Use the collet with properly maintained ER40 nuts and holders, apply manufacturer-recommended torque values, and keep clamping surfaces clean. For critical high-precision work, verify runout after clamping and replace collets showing wear to maintain machining accuracy.

## FAQ

### How much does the FORTIS ER40 FI 25 - 24 DIN6499 collet cost, and is it available for purchase?

The price is 21.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All FORTIS products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized FORTIS service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12382032/68544925_large.webp