Festool Solid Carbide Spiral Groove Cutter HW Spi S8 D4/10 – 4 mm Diameter, 8 mm Shank

Overview

Festool Spiral Groove Cutter HW Spi S8 D4/10 At a Glance: 4 mm cutting diameter, 10 mm cutting length and 8 mm shank. Solid carbide construction with an upward chip-clearing spiral for narrow grooves and template-guided routing. Bring precision to narrow routing work with the Festool HW Spi S8 D4/10 spiral groove cutter. Designed for hardwood and wood-based panel applications, this compact cutter is suited to creating fine grooves and routing openings with a suitable template setup. Its 4 mm cutting diameter makes it a useful choice for detailed furniture, cabinetry and joinery work where a wider cutter would remove too much material. The spiral cutting action helps carry chips upwards towards extraction. Choose a suitable guide, support the workpiece securely and take controlled passes to produce a consistent groove. For small-diameter routing, careful setup and a steady feed are particularly important. Spiral cutting geometry for detailed routing A spiral cutter engages the material progressively along its cutting edge. This geometry provides a drawing cut that helps reduce cutting pressure while clearing chips from the groove. Product Highlights • Narrow cutting profile: Suitable for fine grooves and detailed routing layouts. • Solid carbide construction: Designed for demanding woodworking applications. • Upward chip transport: Helps move waste out of the cut towards the extraction point. • Spiral cutting action: Supports smooth, controlled routing. • 8 mm shank: Fits an appropriate 8 mm router collet. Product Compatibility • Festool compact routers: OF 900, OF 1000, OF 1010 and OF 1010 R. • Festool larger routers: OF 1400, OF 2000 and OF 2200. • Collet requirement: Fit the router with the correct 8 mm collet. • Guided routing: Use an appropriate fence, guide or template arrangement for the intended cut. Plan for the Template Offset When routing with a guide bush, allow for the difference between the bush diameter and cutter diameter. Make a trial cut to confirm the finished dimensions before machining the final workpiece.