Engineered for high-efficiency 3D contour milling and cavity profiling in mold steels ≤38HRC. 35° helix, solid carbide substrate, TiSiN nano coating. All sizes in stock for immediate shipment.
| MOQ | 1 pc (sample/stock) | 50 pcs (OEM/bulk) |
|---|---|
| Lead Time | 3–5 days (standard stock) | 10–15 days (custom/OEM) |
| Inventory | ✓ IN STOCK: R1.5, R2.0, R3.0, R4.0, R5.0, R6.0, R8.0 (All GM-4B sizes available) |
| Custom Options | Extended cutting length (GM-4BL), slim shanks, AlTiN/TiAlN/uncoated, laser marking |
| Packaging | Individual vacuum blister + anti-rust paper | Rigid export cartons (50/100 pcs) |
| Shipping | DHL/FedEx/UPS for samples | Air/Sea freight for bulk. Incoterms: EXW, FOB, CIF, DDP |
| Model | R (mm) | D (mm) | d (mm) | H (mm) | L (mm) | Stock |
|---|---|---|---|---|---|---|
| GM-4B-R1.5-3-6-4-50 | 1.5 | 3.0 | 4 | 6 | 50 | ● In Stock |
| GM-4B-R2-4-8-4-50 | 2.0 | 4.0 | 4 | 8 | 50 | ● In Stock |
| GM-4B-R3-6-12-6-50 | 3.0 | 6.0 | 6 | 12 | 50 | ● In Stock |
| GM-4B-R4-8-16-8-60 | 4.0 | 8.0 | 8 | 16 | 60 | ● In Stock |
| GM-4B-R5-10-20-10-75 | 5.0 | 10.0 | 10 | 20 | 75 | ● In Stock |
| GM-4B-R6-12-24-12-75 | 6.0 | 12.0 | 12 | 24 | 75 | ● In Stock |
| GM-4B-R8-16-32-16-100 | 8.0 | 16.0 | 16 | 32 | 100 | ● In Stock |
● All sizes in stock | Full range: R1.5–R8.0. Diameter tolerance: D≤12 → 0~-0.020mm | D>12 → 0~-0.030mm. R → ±0.01mm. CAD/STEP files available.
4-flute design doubles feed rates compared to 2-flute tools at same RPM. Significantly reduces machining time for high-volume production.
Optimized helix angle provides excellent chip evacuation while maintaining edge strength for stable 3D contouring in mold steels.
~3000 HV hardness with superior thermal stability. Extends tool life by 25-40% in continuous mold steel machining operations.
All 7 sizes (R1.5-R8.0) in stock. Ship within 3-5 days. No waiting for production. Perfect for urgent projects and just-in-time manufacturing.
| Workpiece | Hardness | Suitability | Notes |
|---|---|---|---|
| P20 / 718H / NAK55 | ≤38 HRC | ◎ Excellent | Optimized for mold cavity finishing & EDM electrode shaping |
| Carbon/Alloy Steel (42CrMo, 4140) | ≤38 HRC | ◎ Excellent | Stable for 3D profiling & contour milling |
| Cast Iron / Ductile Iron | - | ◎ Excellent | Air blow cooling recommended |
◎ = Very Suitable | ○ = Suitable | GM-4B is optimized for ≤38HRC. For 40–55HRC hardened steels, use our PM-2B series. For 55-68HRC, use our HM-2B series.
✅ Roughing (≤38HRC): ae = 0.15R–0.20R, ap = 0.10R–0.15R
✅ Semi-Finishing: ae = 0.10R–0.12R, ap = 0.08R
✅ Finishing (Ra≤0.4μm): ae = 0.05R–0.08R, ap = 0.03R–0.05R
✅ Use 3D spiral or radial offset toolpaths to maintain constant chip load
⚠️ Pure axial plunge causes rubbing & heat buildup at the center (Vc=0)
⚠️ Tilt tool 5°–15° relative to surface normal, or use lead-in/out arcs
⚠️ For deep cavities, use helical interpolation or ramp entry instead of straight plunge
⚠️ Ensure runout <0.005mm. Higher runout drastically reduces radius accuracy & finish
Core/cavity profiling in P20/NAK80. 4-flute design reduces machining time by 50% while maintaining Ra≤0.4μm on curved surfaces.
Precision profiling of graphite & copper electrodes for spark erosion. Stable on deep ribs & complex undercuts with superior surface finish.
Orthopedic joints, dental abutments, surgical tool handles. Low-deflection 3D finishing on titanium & CoCr alloys with high efficiency.
🔹 Substrate: Ultra-fine carbide grade (0.4μm grain size) for high toughness & wear resistance
🔹 Grinding: 5-axis CNC machines maintain spherical tolerance ±0.01mm & runout <0.005mm
🔹 Coating: PVD TiSiN layer (2.5–3.5μm) applied at <450°C to preserve edge sharpness & prevent substrate softening
🔹 Inspection: 100% optical profile measurement, coating adhesion scratch test, packaging in dry nitrogen environment
🔹 Traceability: Each batch includes laser-etched SKU, grinding date, and QC certificate. Available upon request.
Specify your diameter range, material, and monthly volume. We respond with pricing, stock status within 24 hours.
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