Mitre Saw DeWALT DWS778-QS

The DeWALT DWS778-QS mitre saw is built on a classic pull-saw concept updated for modern users. It features a high-power motor with a maximum idle speed of 4300 RPM and a blade diameter of 250 mm, offering a cutting depth up to 85 mm and versatile mitre adjustment up to 50° on both sides. The tool’s machined base and fence deliver the accuracy required for demanding applications while a compact internal rail design gives large cutting capacity in a transportable format.

Advantages

The saw includes a dust extraction system engineered for heavy professional use to reduce airborne dust exposure. A new head lock function fixes the head to restrict the sliding action for trim operations and safer transport. A sliding left-hand fence with measuring scale improves workpiece support and positioning. XPS Shadow line projection provides quick, accurate blade alignment and illuminates the cut area. Integrated positive mitre stops at 15°, 22.5°, 30° and 45° plus a quick-release mitre mechanism allow settings up to 50°. The machine is available with a high-power 1850 W motor (a 1650 W low-voltage variant is used in the UK).

Suitable for

• General timber crosscuts and mitre joints
• Trim, profiling and joinery where precise angled cuts are required
• Site work and workshop applications requiring portability with high cutting capacity
• Professional use with frequent heavy-duty cutting and dust management needs

Key specifications

• Motor power: 1850 W (1650 W low-voltage version in the UK)
• No-load speed: up to 4300 RPM
• Blade diameter: 250 mm
• Maximum cutting depth: 85 mm
• Mitre range: up to 50° left and right
• Positive mitre stops at 15°, 22.5°, 30° and 45°
• Machine dimensions (W×D×H): 615 × 465 × 390 mm

How to use

Secure the saw on a stable surface and fit the appropriate 250 mm blade for the material. Set the required mitre angle using the mitre scale and positive stops or adjust with the quick-release mechanism for angles up to 50°. Use the sliding fence and measuring scale to position and support the workpiece. Engage the head lock when transporting the saw or when performing trim cuts that require a fixed head. Connect an appropriate dust extraction system to the dust port before cutting to reduce airborne dust.

Usage recommendations

For accurate mitre and crosscuts, allow the blade to reach full speed before feeding the workpiece and use the XPS shadow line to align the cut. Regularly check blade condition and maintain the dust extraction system to preserve motor performance and operator health over prolonged use.