What are the dimensions of this spiral groove cutter?

The cutter has a diameter of 8 mm, a working cutting length of 25 mm, and an 8 mm shank.

Which materials is this cutter suitable for?

Thanks to the solid carbide (HW) design, it is ideal for sheet materials, hardwoods, and softwoods.

Which routers is this spiral bit compatible with?

It fits any router fitted with an 8 mm collet.

What is the benefit of the spiral flute design?

The spiral shape ensures smooth operation and pulls chips upward effectively for clean cutting results.

Does this cutter come with a ball bearing?

No, this model has no ball bearing and is guided using guide rails, parallel side fences, or guide bushes.

FESTOOL HW Spi S8 D8/25 spiral groove cutter - 490979

Name: FESTOOL HW Spi S8 D8/25 spiral groove cutter - 490979
Brand: FESTOOL
SKU: 02332175
Price: 67.95 EUR
Availability: PreOrder

Supplier number: FESTOOL 490979 | EAN 4014549000793

Recommended Retail Price €83.76

67.95 tax incl.

€56.16 excl. VAT (incl. all environmental contributions)

On order: delivered from 10/10/2026

blister

Ordered before 20:00 - delivered as of 10/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Smooth and precise groove routing

Practical benefits

Clean routing with Festool: You create clean slots and cut-outs in panel materials or hardwood using durable solid carbide.
Efficient upward chip extraction: The spiral geometry draws wood chips straight upwards, keeping your workpiece clean and clear while routing.
Smooth and effortless operation: The pulling cut reduces cutting resistance so you maintain complete control with noticeably lower vibrations.

In a nutshell

The right choise for

With the Festool spiral groove cutter hw spi S8 D8/25, you create clean, tear-free grooves and cut-outs in sheet materials, hardwoods, and softwoods. The solid carbide spiral flutes pull chips directly upwards, keeping your cutting line clear while preventing heat build-up. Thanks to the pulling cut, cutting resistance and vibrations are noticeably reduced, giving you smooth, highly controlled handling on any router with an 8 mm collet. Featuring an 8 mm diameter and a 25 mm cutting length, it provides the accuracy and reliability you need for professional joinery and slotting work.

Product information FAQ

€67.95

tax incl.

Key features according to our expert

Diameter: 8 mm
Cutting length: 25 mm
Shank size (milling cutter): 8 mm
Router bit type: Straight cutter
With bearing: No

Product description

Spiral groove cutter

Thanks to the solid carbide, the cutter can be used for a multitude of materials. Spiral groove cutters are outstandingly suited to creating grooves or routing cut-outs with templates.

The drawing cut of the cutter generates less cutting pressure, thus creating clean routing results

Ideally suited for

Particularly smooth running spiral groove cutters, in HW steel optimally suited for panel materials and hardwood applications
Because of the spiral shape of the cutter blade, cutter chips are drawn directly upwards and optimally extracted

All Features

Diameter: 8 mm
Cutting length: 25 mm
Shank size (milling cutter): 8 mm
Router bit type: Straight cutter
With bearing: No
D: 8.00 mm
Nl: 25.00 mm
Gl: 55.00 mm
S: 8 mm

Brand FESTOOL
02332175
EAN 4014549000793
Supplier number FESTOOL 490979

Frequently asked questions about this product

Answered by specialists

What are the dimensions of this spiral groove cutter?: The cutter has a diameter of 8 mm, a working cutting length of 25 mm, and an 8 mm shank.
Which materials is this cutter suitable for?: Thanks to the solid carbide (HW) design, it is ideal for sheet materials, hardwoods, and softwoods.
Which routers is this spiral bit compatible with?: It fits any router fitted with an 8 mm collet.
What is the benefit of the spiral flute design?: The spiral shape ensures smooth operation and pulls chips upward effectively for clean cutting results.
Does this cutter come with a ball bearing?: No, this model has no ball bearing and is guided using guide rails, parallel side fences, or guide bushes.