Menu
Your Cart

Festool HW Spi S8 D8/25 Solid Carbide Spiral Groove Cutter 8 mm × 25 mm with 8 mm Shank

Festool HW Spi S8 D8/25 Solid Carbide Spiral Groove Cutter 8 mm × 25 mm with 8 mm Shank
Festool HW Spi S8 D8/25 Solid Carbide Spiral Groove Cutter 8 mm × 25 mm with 8 mm Shank
  • Brand: FESTOOL
  • Model: FES490979
  • Weight: 0.06kg
  • Dim: 102 mm x 53 mm x 53 mm
  • UPC: 4014549000793
Price:
R 2,253.43
Ex VAT: R 1,959.50

Available Options

Contact us
Stockist

Festool HW Spi S8 D8/25 Solid Carbide Spiral Groove Cutter

At a Glance: 8 mm cutting diameter, 25 mm cutting length and 8 mm shank. Solid carbide construction with an upward chip-clearing spiral for routing grooves and template-guided cut-outs in suitable panel materials and hardwood.

Create clean grooves and accurately guided cut-outs with the Festool HW Spi S8 D8/25 Spiral Groove Cutter. Its solid carbide construction is particularly suited to panel materials and hardwood applications, while the spiral cutting geometry provides a progressive shearing action that reduces cutting pressure and promotes smooth routing. The right-hand spiral draws chips upwards from the cut, helping clear the groove and supporting effective extraction when used with a suitable dust extraction setup. With an 8 mm cutting diameter, 25 mm cutting length and 55 mm overall length, this cutter is a practical choice for furniture, cabinetry and joinery tasks requiring narrow grooves or controlled cut-outs. Fit it to the correct 8 mm collet in a compatible Festool router and use an appropriate fence, guide or template to establish the cutting path.

Spiral Cutting Action with Upward Chip Removal

The helical cutting edges engage the material progressively and carry chips upwards. This helps remove debris from the cutting area, particularly when routing grooves where chips can otherwise accumulate around the cutter.

Product Highlights

  • Solid carbide construction: Designed for demanding routing applications in suitable panel materials and hardwood.
  • 8 mm cutting diameter: Suitable for narrow grooves and appropriately guided cut-outs.
  • 25 mm cutting length: Provides the stated usable cutting section for controlled routing operations.
  • Upward chip evacuation: The spiral draws chips out of the groove towards the extraction area.
  • Reduced cutting pressure: The drawing cut supports clean results and smooth operation.
  • 8 mm shank: Secures in the appropriate 8 mm collet of a compatible router.

Product Compatibility

  • Festool OF 900: Compatible with the appropriate 8 mm collet.
  • Festool OF 1000: Compatible with the appropriate 8 mm collet.
  • Festool OF 1010 and OF 1010 R: Listed by Festool for this cutter.
  • Festool OF 1400: Listed by Festool for this cutter.
  • Festool OF 2000: Listed by Festool for this cutter.
  • Festool OF 2200: Listed by Festool for this cutter.

Compatibility note: Use the correct 8 mm collet and confirm the machine's cutter clearance, insertion requirements and permitted operating speed. Template-guided routing requires a suitable guiding arrangement, such as an appropriate copying ring, with its offset allowed for in the template design.

Extra Information

Cutting Diameter and Shank Diameter

This cutter has both an 8 mm cutting diameter and an 8 mm shank. The cutting diameter determines the nominal groove width, while the shank diameter determines the required collet size. Always make a test cut when the groove must fit another component precisely.

What Does HW Spi S8 D8/25 Mean?

HW identifies carbide cutting material, Spi identifies the spiral design, S8 denotes the 8 mm shank and D8/25 identifies the 8 mm cutting diameter with 25 mm cutting length.

Upward Chip Movement

The spiral lifts chips towards the top of the workpiece. Clamp the material securely and test the finish on the exposed face, particularly when machining delicate veneers or surface layers.

Cutting Length Is Not a Single-Pass Recommendation

The 25 mm cutting length does not mean that a full-depth cut should be made in one pass. Select suitable depth increments for the material, machine and guiding setup, following the relevant instructions.

Template Offset

When a copying ring guides the router, the cut is offset from the template edge. Calculate the offset from the copying ring and cutter diameters before preparing the template.

Parts Numbers Matter

Important: Please confirm Festool article number 490979, the required 8 mm cutting diameter and the machine's 8 mm collet before ordering.

Pro Tips

  • Make a test groove in matching scrap material and check its fit before machining the finished component.
  • Use controlled depth increments rather than forcing a deep cut.
  • Keep the workpiece and template securely clamped throughout routing.
  • Maintain a steady feed to avoid dwelling in one position.
  • Connect suitable dust extraction and keep the cutting path clear of accumulated debris.
  • Protect the carbide edges from impacts during handling and storage.

How to Use

  • Disconnect the router from its power supply before installing or adjusting the cutter.
  • Inspect the cutter and fit it into the appropriate 8 mm collet, observing the specified insertion depth.
  • Secure the workpiece and install the required fence, guide or template arrangement.
  • Check cutter clearance and, where applicable, the copying ring alignment and template offset.
  • Connect dust extraction and set an appropriate operating speed and initial cutting depth.
  • Make a test cut using the entry method and feed direction specified by the machine and cutter instructions.
  • Check the result and increase the depth in suitable stages until the required groove or cut-out is completed.
  • Wait for the cutter to stop completely before lifting away the router, adjusting the setup or inspecting the work.

Features

  • Solid tungsten carbide cutter: HW construction suited to the specified woodworking applications.
  • Right-hand spiral: Helical cutting geometry draws chips upwards during operation.
  • Progressive cutting action: The drawing cut reduces cutting pressure.
  • 8 mm diameter: Establishes the nominal width of a groove cut along a single guided path.
  • 25 mm cutting length: Usable cutting section within a 55 mm overall tool length.

Benefits

  • Cleaner cutting area: Upward chip movement helps clear the groove during routing.
  • Smooth routing: Progressive engagement supports controlled cutting in suitable materials.
  • Versatile workshop use: Suitable for grooves and template-guided cut-outs.
  • Effective extraction support: Chips move towards the router's extraction area when an appropriate system is fitted.
  • Consistent component preparation: Use a suitable guide or template to repeat the required cutting path.

Applications

  • Routing narrow grooves in suitable wood-based panel materials.
  • Grooving hardwood components for furniture and joinery.
  • Producing cut-outs with an appropriate template and guiding arrangement.
  • Preparing guided slots and recesses within the cutter's working limits.
  • Repeat routing operations using a securely mounted fence, guide or template.

Safety

  • Follow the router, cutter and guiding accessory instructions.
  • Disconnect the power supply before changing cutters or adjusting the setup.
  • Use the correct 8 mm collet and observe the specified insertion depth and permitted operating speed.
  • Secure the workpiece against movement and lifting during cutting.
  • Do not use a cutter with chipped edges, cracks or other damage.
  • Keep hands clear of the rotating cutter and use the prescribed feed direction.
  • Wear suitable eye and hearing protection. Use effective extraction and respiratory protection appropriate to the material.
  • Have sharpening and repairs carried out by a qualified specialist.

Specifications

Description Spec
BrandFestool
Product Description:Router Spiral Groove Cutter
Cat No.FES490979
Festool Article Number490979
ModelHW Spi S8 D8/25
Product TypeSpiral groove cutter
Cutter ConstructionSolid tungsten carbide
Cutting Diameter (D)8 mm
Cutting Length (NL)25 mm
Overall Length (GL)55 mm
Shank Diameter (s)8 mm
Spiral DirectionRight-hand twist
Chip EvacuationUpwards
Recommended Material ApplicationsSuitable panel materials and hardwood
Primary OperationsGrooving and template-guided cut-outs
Compatible MachinesOF 900, OF 1000, OF 1010, OF 1010 R, OF 1400, OF 2000 and OF 2200
Quantity1 cutter

Scope of Delivery:

  • 1 x Festool HW Spi S8 D8/25 solid carbide spiral groove cutter, article 490979.
Tags: Festool , Spiral Groove Cutter , Solid Carbide Router Bit , 8 Mm Cutter , 8 Mm Shank , Upcut Spiral Cutter , Groove Routing , Template Routing , Hardwood Routing , Router Accessories , FES490979
Cutters Hs Spi D16-20
Cutters Hs Spi D16-20
Festool Spiral groove cutter HS Spi S8 D16/20 Order number: FES490949 Model: HS Spi S8 D16/20 ....
R 1,197.73
Ex VAT:R 1,041.50
Contact us
Stockist
Cutters Hs Spi D8-19
Cutters Hs Spi D8-19
Festool Spiral groove cutter HS Spi S8 D8/19 Order number: FES490945 Model: HS Spi S8 D8/19 ....
R 798.10
Ex VAT:R 694.00
Contact us
Stockist
Cutters Hs Spi D10-30
Cutters Hs Spi D10-30
Festool Spiral groove cutter HS Spi S8 D10/30 Order number: FES490946 Model: HS Spi S8 D10/30 ....
R 1,197.73
Ex VAT:R 1,041.50
Contact us
Stockist
Groove Cutter Hs Spi D6-16
Groove Cutter Hs Spi D6-16
Festool Spiral groove cutter HS Spi S8 D6/21 Order number: FES490944 Model: HS Spi S8 D6/21 ....
R 1,033.85
Ex VAT:R 899.00
Contact us
Stockist
Cutters Hs Spi D12-20
Cutters Hs Spi D12-20
Festool Spiral groove cutter HS Spi S8 D12/20 Order number: FES490947 Model: HS Spi S8 D12/20 ....
R 983.83
Ex VAT:R 855.50
Contact us
Stockist
Cookie Notice:
We Use Cookies... In addition to the cookies that are strictly necessary for the operation of this website, Vermont Sales uses cookies and other tracking tools to remember your preferences and to measure our website performance. Rest assured, your information is safe with us and we will NEVER share it with any other party. Privacy Policy