Which materials is this spiral groove cutter suitable for?

This HS steel cutter is ideal for use in softwood and solid wood.

What is the shank size of this router bit?

The cutter has an 8 mm shank diameter.

What are the cutting dimensions of this bit?

The router bit has a cutting diameter of 12 mm and a cutting length of 20 mm.

Does this groove cutter have a guide bearing?

No, this cutter is designed without a ball bearing.

How are wood chips extracted during routing?

Thanks to the spiral shape, chips are drawn directly upwards for efficient dust extraction.

FESTOOL HS Spi S8 D12/20 spiral groove cutter - 490947

Name: FESTOOL HS Spi S8 D12/20 spiral groove cutter - 490947
Brand: FESTOOL
SKU: 02332169
Price: 29.2 EUR
Availability: InStock

Supplier number: FESTOOL 490947 | EAN 4014549000397

Recommended Retail Price €36.52

29.20 tax incl.

€24.13 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 1 products in stock.

blister

Ordered before 20:00 - delivered as of 03/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Clean groove routing with Festool spiral technology

Practical benefits

Smooth and clean cutting: The drawing cut reduces cutting pressure, allowing you to achieve tear-free grooves and template cutouts in softwood.
Optimal chip upward extraction: The spiral flute guides wood chips directly upward, ensuring you maintain a clear view of your work line.
Stable vibration free operation: Premium HS steel construction delivers a smooth run, giving you consistent control during all delicate routing tasks.

In a nutshell

The right choise for

With the Festool hs spi S8 D12/20 spiral groove cutter, you route clean grooves, rebates, and template cutouts in softwood and solid wood. Crafted from high-grade hs steel, its spiral flute geometry reduces cutting pressure to deliver a smooth run and tear-free edges. The upward drawing action pulls wood chips straight to the top, keeping your cutline clear and maximizing dust extraction efficiency. Featuring an 8 mm shank, a 12 mm cutting diameter, and a 20 mm cutting length, it produces precise 12 mm wide grooves with total accuracy.

Product information FAQ

€29.20

In stock - tax incl.

Key features according to our expert

Diameter: 12 mm
Cutting length: 20 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: 12 mm
Cutting length: 20 mm
Shank size (milling cutter): 8 mm
Router bit type: Straight cutter
With bearing: No
D: 12.00 mm
Nl: 20.00 mm
Gl: 52.00 mm
S: 8 mm

Brand FESTOOL
02332169
EAN 4014549000397
Supplier number FESTOOL 490947

Frequently asked questions about this product

Answered by specialists

Which materials is this spiral groove cutter suitable for?: This HS steel cutter is ideal for use in softwood and solid wood.
What is the shank size of this router bit?: The cutter has an 8 mm shank diameter.
What are the cutting dimensions of this bit?: The router bit has a cutting diameter of 12 mm and a cutting length of 20 mm.
Does this groove cutter have a guide bearing?: No, this cutter is designed without a ball bearing.
How are wood chips extracted during routing?: Thanks to the spiral shape, chips are drawn directly upwards for efficient dust extraction.