Name: Concave Round Over Router Bit R40 mm - HSS Premium
Brand: Solgrat
SKU: 9R3R-d32
Price: 138.0 RON
Availability: InStock

Concave Quarter Round Router Bit for 40 mm Edge Rounding – Brazed with HSS M2

🔩 Technical Specifications:

Feature	Value
Outer diameter	180 mm
Active working space	47 mm
Tooth type	Brazed cutters with silver (Ag) alloy Inserts - HSS M2 (6.5% tungsten)
Hardness	62…66 HRC
Recommended rotations	6000 rpm
Wear resistance	up to 3,000 linear meters in softwood
Inserts	Replaceable – long-term investment
Quantity of cutters per package	1 pc. of your choice
Package weight	2000g

The professional R40 concave quarter round router bit is designed for precise woodworking, ideal for creating grooves, decorative carvings, and deep rounds. The brazed HSS M2 inserts (6.5% tungsten) ensure a clean cut, high wear resistance, and durability in intensive work.

⚠️ The router bit is available in two working directions:

Right (above the wood) and Left (below the wood) – allowing you to choose the optimal option for your feed direction and machine configuration.

Features and Benefits:

✅ 40 mm concave radius – ideal for deep profiles, grooves, and decorative shapes

✅ Premium HSS M2 – durable inserts, consistent performance, and long lifespan

✅ Clean and precise cut – optimized geometry for a smooth finish without fiber tearing

✅ High versatility – suitable for furniture, architectural elements, and artisanal woodworking

✅ Stability in operation – balanced body, ideal for professional machines with standard bore

📌 Choose the appropriate working direction (right or left) and achieve perfect contours for solid wood projects.

⚠️ Usage limitations:

❌ We do not recommend the HSS variant for particleboard, MDF, HDF, or very hard exotic wood

❌ For composite materials or demanding applications, choose the variant with Carbide inserts

🛠️ Selection Guide: HSS vs. CARBIDE (Brazed Tools)

The choice of material depends not only on wood hardness but also on how the cutting edge interacts with the fiber. Our brazed router bits are optimized for stationary and CNC machines, but their performance varies drastically depending on the wood essence being processed.

✅ Conclusions for purchase:

Standard HSS: Exclusively for very soft wood (Spruce, Fir, Pine, Linden). Economical, fine cut.
HSS M2: The "King" of softwoods. Guarantees immaculate white without burns. Also works on Oak/Beech for a mirror finish, but wears faster.
Carbide (CMS): Mandatory for hard/exotic wood (Oak, Beech, Mahogany) and derivatives (MDF, Particleboard, Laminated). Lasts thousands of meters without sharpening.