• Freza cu alezaj, placată cu HSS, proiectată pentru prelucrarea canelurilor semirotunde sau de raionat în lemn, holcher 40 mm, rază de 20 mm pentru precizie.
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Convex Half-Round Router Bit R3 – R60 mm | Concave Groove for Wood – Premium HSS / T.C.T. Carbide

Convex Half-Round Router Bit R3 – R60 mm | Concave Groove for Wood – Premium HSS / T.C.T. Carbide

7R3HSS-d30

155,00 RON
172,00 RON 155,00 RON
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Material × Radius × Bore

Low stock: 5 left

Convex Half-Round Router Bit R3 – R60 mm | Concave Groove on Wood – HSS Premium / T.C.T. Carbide

Professional router bit with bore and convex profile (outwardly curved) — used for carving a concave groove on wood: decorative grooves, functional channels, carved handles, or classic architectural elements. Often used with a concave (rounding) router bit for alternating decorative bead-and-channel profiles. Available in a wide range of radii, from R3 to R60 mm, and in HSS M2 Premium and T.C.T. Carbide variants — select material, radius, and bore from the menu.

Profile ProfileConvex router bit (outwardly curved) – produces an inwardly carved concave groove on wood
Available Radius Range Available Radius RangeR3 – R60 mm (selectable variants)
Active Working Space Active Working Space2 × Selected Radius (e.g., R20 mm variant has 40 mm groove width)
Outer Diameter Outer DiameterVaries depending on the chosen radius – according to the technical drawing of the variant
Bore (d) Bore (d)Indicated for each variant: Ø30 mm or Ø32 mm | Ø32/30 mm (with reduction bush included) | other sizes on request
Cutting Edge Material Cutting Edge MaterialHSS M2 Premium (6.5% Tungsten), 64–66 HRC | T.C.T. Carbide (Tungsten Carbide), 85–92 HRC – select variant
Construction Type Construction TypeBrazed with silver alloy (Ag), successively resharpenable; re-brazable when extensively worn
Body Finish Body FinishBlack oxidation (bluing) – additional anti-corrosion protection
Number of Teeth Number of Teeth4 pcs.
Recommended Speed Recommended Speed6,000 or 9,000 RPM – the exact value is indicated on each router bit
Estimated Yield Estimated YieldUp to 3,000 linear meters (in softwoods, before the first resharpening)
Quantity per Parcel Quantity per Parcel1 x Router Bit (for multiple pieces, adjust quantity at checkout)
Country of Origin Country of OriginUkraine

🔧 MAIN FEATURES:

  • Precise Concave Groove: the convex profile of the router bit carves a uniform and aesthetic groove on wood, across the entire R3–R60 mm radius range.
  • Durable Cutting Edges: 4 brazed teeth made of HSS M2 or T.C.T. Carbide, resistant to intensive use.
  • T.C.T. Carbide for Composites: carbide inserts resist the abrasive wear of synthetic binders in MDF, particle board, and HDF, where HSS would wear prematurely.
  • Ideal Pair with Concave Router Bit: combined with the rounding (concave) router bit, it allows for alternating decorative bead-and-channel profiles, typical for frames and classic architectural elements.
  • Body with Oxidized Finish: black oxidation (bluing) treatment provides additional corrosion protection, in addition to the characteristic matte black appearance.
  • Long-Term Investment: inserts can be successively resharpened at a specialized center (to maintain the rake angle), and with advanced wear, the router bit body can be re-brazed with new inserts.
  • Compatible with Classic Spindle Moulders and 4-Sided Planers: mounts on both classic spindle moulders and 4-sided planers.
  • Custom Radius on Request: if your project requires a specific radius outside the standard range, you can contact us with your project's technical drawing.

⚠️ USAGE LIMITATIONS:

  • HSS M2 Variant: ❌ NOT recommended for use on particle board, MDF, HDF, or very hard exotic wood. For these materials, select the T.C.T. Carbide variant.
  • Carbide Variant on Softwood: requires constant feed – stalling in rotation on resinous woods can cause local burns.

🛠️ Selection Guide: HSS M2 vs. T.C.T. Carbide

Choosing the correct cutting edge material directly influences the finish quality and tool lifespan:

Material Processed HSS M2 Premium ⭐
(6.5% Tungsten) 		T.C.T. Carbide ⭐
(Tungsten Carbide)
Softwood
(Spruce, Pine, Fir) 		⭐ 100%
(Flawless Finish)		 ❌ Risk of burning
(High friction)
Hardwood
(Beech, Oak, Ash) 		80%
(Efficient)		 ⭐ 100%
(Maximum resistance)
MDF / Particle Board / HDF / Laminated Not recommended ⭐ 100%
(Optimal)
Number of Resharpenings Maximum (M2) Limited (3 mm)
Cutting Edge Material Hardness 64 – 66 HRC 85 – 92 HRC

✅ Purchase Conclusions:

  1. HSS M2 – for solid wood: ideal for soft and hardwoods, a cutting edge that sharpens more finely, leaving the concave groove perfectly smooth directly from the machine.
  2. T.C.T. Carbide – for composites and intensive production: mandatory for MDF, particle board, HDF, or abrasive exotic/composite woods, where it lasts much longer than HSS without resharpening.
  3. Simple Configuration: select the Material (HSS/Carbide), the Radius (R3–R60) suitable for your project, and the Spindle Bore according to the flange of the machinery used in your workshop.

🦺 SAFETY MEASURES DURING USE:

  • Mandatory protective equipment: safety glasses (against projected chips), mask or respirator filter (fine wood dust), and earmuffs for prolonged work.
  • Attention to hands and fingers: maintain a safe distance from the cutting area and use feed/push devices where possible; do not manually intervene near the moving router bit.
  • Check the secure fastening of the router bit and spacer rings on the spindle before starting the machine.
  • Observe the recommended speed indicated for each router bit to avoid vibrations or the risk of cutting edge breakage.
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