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header-product Collet FORTIS ER20 Ø4 mm for DIN6499 tool holders
15.99 €

Collet FORTIS ER20 Ø4 mm for DIN6499 tool holders

Collet FORTIS ER20 Ø4 mm Photo 1
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Collet FORTIS ER20 Ø4 mm for DIN6499 tool holders

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Collet FORTIS ER20 Ø4 mm for DIN6499 tool holders

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Short description

FORTIS ER20 collet with 4 mm inner diameter designed for use with DIN6499-compatible tool holders and spindles. The precision-machined collet secures end mills, drills and other cylindrical shank tools in ER20 chucks, providing concentric clamping and reliable gripping for milling, drilling and machining operations. Suitable for workshop and industrial CNC applications.
Available for order: 3 pcs.
Warranty: 2 Years
SKU: 11726516
Manufacturer: FORTIS
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Cheapest delivery:

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Cost

1.89 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
13.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
16.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
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Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Latvijas Pasts nodaļa
16.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
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Product information

Description

The FORTIS ER20 Ø4 mm collet is a precision clamping accessory designed for DIN6499-compatible tool holders and spindles. Manufactured to provide concentric clamping of cylindrical shank tools, this ER20 collet supports secure holding of end mills, drills and other small-diameter cutting tools. Its accurate diameter and tapered body ensure repeatable gripping performance for machining operations in both workshop and industrial CNC environments.

Advantages

The collet offers high concentricity and consistent clamping force, reducing runout and improving surface finish. Its hardened and ground surfaces resist wear and maintain gripping accuracy over repeated tool changes. The standardized ER20 form factor ensures compatibility with a wide range of DIN6499-style collet chucks and spindles, simplifying tooling management across machines. The compact Ø4 mm inner diameter is suited for small-diameter cutters while maintaining stable retention during milling and drilling.

Suitable for

  • Securing 4 mm cylindrical shank end mills and drills
  • Precision milling and pocketing on CNC machines
  • Light-duty drilling and reaming operations
  • Workshop tool setups and quick-change toolholders

Key specifications

  • Collet type: ER20
  • Inner clamping diameter: 4 mm
  • Compatibility: DIN6499-style tool holders and compatible spindles
  • Material and finish: precision-hardened and ground steel (manufactured for wear resistance and accuracy)
  • Application: milling, drilling and general turning-on-compatible chucks where ER20 is used

How to use

Insert the tool shank into the collet and screw the collet assembly into the ER20 chuck according to the tool holder manufacturer's torque and tightening sequence. Ensure the tool is seated properly and the collet compresses evenly by tightening the nut or retention mechanism to the specified torque. Verify concentricity and runout after installation before starting the machining cycle. For safe operation, follow machine and tooling safety rules and inspect the collet regularly for wear or damage.

Usage recommendations

Use the collet with tools that match the 4 mm shank diameter for optimal grip and reduced runout. Avoid over-tightening; follow the tool holder's recommended torque values. Regularly clean the collet bore and the mating surfaces of the tool holder to prevent debris from affecting clamping accuracy. Replace collets showing visible wear, cracking or loss of concentricity to maintain machining quality and safety.

Description

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Customer reviews

Customer questions

FAQ

How much does the Collet FORTIS ER20 Ø4 mm cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 13.07.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.