Which materials is this spiral groove cutter suitable for?

This HS steel bit is optimally designed for routing grooves and cut-outs in softwoods and solid wood.

What is the shank size of this router bit?

It features an 8 mm shank, making it compatible with routers equipped with an 8 mm collet.

What are the cutting dimensions?

The router bit has a cutting diameter of 18 mm and a usable cutting length of 25 mm.

What is the advantage of the spiral flute design?

The spiral shape pulls wood chips directly upward, ensuring smooth running and optimal dust extraction.

Does this router bit include a guide bearing?

No, it does not have a ball bearing and is guided using a side fence, guide rail, or copy ring.

FESTOOL HS Spi S8 D18/25 spiral groove cutter - 490950

Name: FESTOOL HS Spi S8 D18/25 spiral groove cutter - 490950
Brand: FESTOOL
SKU: 02332172
Price: 41.6 EUR
Availability: PreOrder

Supplier number: FESTOOL 490950 | EAN 4014549000434

Recommended Retail Price €51.41

41.60 tax incl.

€34.38 excl. VAT (incl. all environmental contributions)

On order: delivered from 12/10/2026

blister

Ordered before 20:00 - delivered as of 12/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

✆ Talk to a specialist

Precision groove routing with Festool

Practical benefits

Smooth and stable operation: The spiral cutting edge ensures exceptionally smooth running and easy control when routing in softwood.
Direct upward chip extraction: Spiral flutes guide chips straight upward during cuts, ensuring your dust extraction performs with maximum efficiency.
Clean and tear-free grooves: The pulling cutting action lowers cutting pressure to deliver clean, precise grooves and template cut-outs.

In a nutshell

The right choise for

With the Festool hs spi S8 D18/25 spiral groove cutter, you route precise grooves and cut-outs with smooth, effortless control. The spiral flute design delivers exceptionally quiet and stable running in softwood and solid wood. By utilizing a pulling cutting action, it noticeably reduces cutting pressure to produce clean, tear-free grooves 18 mm wide and up to 25 mm deep. At the same time, the upward spiral evacuates wood chips directly toward the top, keeping your workpiece clear and maximizing dust extraction efficiency. Featuring an 8 mm shank, this router bit fits securely into your router for accurate woodworking results.

Product information FAQ

€41.60

tax incl.

Key features according to our expert

Diameter: 18 mm
Cutting length: 25 mm
Shank size (milling cutter): 8 mm
Router bit type: Straight cutter
With bearing: No

Product description

Spiral groove cutter

Spiral groove cutters are outstandingly suited to creating grooves or routing cut-outs with templates. Thanks to the high-performance cutting steel, it is suitable above all for solid wood.

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 HS steel, optimally suited for softwood applications
Because of the spiral shape of the cutter blade, cutter chips are drawn directly upwards and optimally extracted

All Features

Diameter: 18 mm
Cutting length: 25 mm
Shank size (milling cutter): 8 mm
Router bit type: Straight cutter
With bearing: No
D: 18.00 mm
Nl: 25.00 mm
Gl: 57.00 mm
S: 8 mm

Brand FESTOOL
02332172
EAN 4014549000434
Supplier number FESTOOL 490950

Frequently asked questions about this product

Answered by specialists

Which materials is this spiral groove cutter suitable for?: This HS steel bit is optimally designed for routing grooves and cut-outs in softwoods and solid wood.
What is the shank size of this router bit?: It features an 8 mm shank, making it compatible with routers equipped with an 8 mm collet.
What are the cutting dimensions?: The router bit has a cutting diameter of 18 mm and a usable cutting length of 25 mm.
What is the advantage of the spiral flute design?: The spiral shape pulls wood chips directly upward, ensuring smooth running and optimal dust extraction.
Does this router bit include a guide bearing?: No, it does not have a ball bearing and is guided using a side fence, guide rail, or copy ring.