المنشار الدائري (DT1938-QZ) من (Dewalt) المكون من (18) سنناً بقطر (184mm) بسماكة (2.6mm) و بحجم تثبيت (16mm) و بزاوية أسنان (20DEG)

The Dewalt DT1938-QZ is an ATB (alternate top bevel) circular saw blade with 18 teeth and a 20-degree hook angle. This design delivers clean, precise cross-cuts with reduced splintering, making it suitable for wood and wood-based materials. The blade is built from high-grade steel with carbide teeth for durability and consistent performance.

Key specs include: 18-tooth ATB design, 20° hook angle, 1.7 mm kerf (thickness of the cut), and a 2.6 mm plate thickness. The blade is described as corrosion-resistant and designed for cold sawing across light and heavy-duty woodworking tasks.

This blade is optimized for wood and wood-based materials, such as softwood, hardwood, and plywood. The ATB geometry and 20° hook angle help produce a smooth finish on these substrates, especially for cross-cuts and finish cuts.

The ATB (alternating top bevel) teeth provide clean edges with reduced chipping and tear-out on wood, while the 20° hook angle helps the blade bite into the material smoothly. This combination is particularly good for precise cross-cuts and finishing cuts in softwood and hardwood.

The kerf is the thickness of the material removed by the blade in a cut. A 1.7 mm kerf is relatively narrow, which reduces material waste and can provide cleaner slices if you’re making multiple passes or aiming for precise dimensioning. It also requires a compatible saw setup to maintain stability.

Unplug the saw, access the blade arbor cover, use the appropriate arbor wrench to loosen the retaining nut, remove the old blade, and align the teeth so they point in the correct direction. Install the DT1938-QZ with the teeth-facing the saw’s rotation, tighten the nut securely, reattach the guard, and plug the saw back in before testing the cut on scrap stock.

Always wear eye and hearing protection and a dust mask if cutting dusty materials. Secure the workpiece, use clamps, and avoid forcing the blade through material. Let the blade reach full speed before starting, maintain a steady feed rate, and keep hands away from the cutting zone. Ensure blade guards are functioning properly and inspect the blade for damage before use.

Compared to other ATB blades, the DT1938-QZ’s 18 teeth and 20° hook angle are tuned for clean cross-cuts in wood with good finish quality. When comparing on Fepy, look for differences in tooth count, hook angle, kerf width, and plate thickness to match your material and cut type. For example, blades with more teeth may yield smoother finishes on plywood, while blades with a lower hook angle can be gentler on delicate workpieces.

Use cases include precise cross-cuts and finish cuts in softwood and hardwood, dimensional lumber, and plywood. It’s suitable for light to heavy-duty woodworking tasks where a clean edge and minimal tear-out are important.

Keep blades clean and free of resin buildup, avoid overheating the blade by feeding at an appropriate rate, use sharp, compatible blades for the material, and store blades dry when not in use. Check the teeth regularly for chipping or dullness and replace if performance declines.

Common Dewalt alternatives on Fepy include blades with different tooth counts and hook angles (e.g., 18T vs 24T, 20° vs 15°), which affect finish quality and cutting speed. A higher tooth count typically provides a finer finish, while a lower count cuts faster but may leave a rougher edge. For reference, you can explore similar options here: https://fepy.com/product/dewalt-dt1939-qz-circular-saw-blade and https://fepy.com/product/dewalt-dt1928-qz-circular-saw-blade to compare tooth counts, kerf, and material recommendations side-by-side.