Tungaloy WGE50 GH730 External Grooving Insert | 5mm PVD Carbide for Steel & Stainless
Tungaloy WGE30 / WGE30R GH730 Grooving Inserts | 3mm PVD Coated Carbide for Stainless
Tungaloy WGE20 / WGE20R GH730 Grooving Inserts | PVD Coated Carbide for Steel & Stainless
About Tungaloy Grooving & Parting Inserts
Tungaloy grooving and parting inserts are precision carbide tools for external grooving, internal grooving, face grooving, and full parting-off operations on CNC lathes. The Tungaloy TungCut and TetraForce families are the workhorses of the line, with chip-breaker geometries designed for chip control in narrow grooves and high-feed parting. Tungaloy's JTGR series is the most popular external grooving line globally, covering 1.0mm to 3.3mm groove widths in a single insert family.
Every Tungaloy insert on this page is genuine OEM product from Tungaloy Corporation (Japan, est. 1929, part of IMC Group), shipped with full lot traceability. CNCHome-Beyond is an authorized Tungaloy distributor; orders placed before 3 PM China time ship same-day from our Hangzhou warehouse with DHL/UPS/FedEx express delivery in 3-7 business days.
Tungaloy Grooving Series at a Glance
| Series | Geometry | Width Range | Type | Best For |
|---|---|---|---|---|
| GR (7/8/9) | Full-radius with chip-breaker | 1.0-3.5 mm | Internal grooving | ID grooving on small-diameter bores |
| JTGR | Single-ended, full-radius with chip-breaker | 1.0-3.3 mm | External grooving | General purpose OD grooving, recessing |
| JCGN | Full-radius with chip-breaker | 2.0 mm | Face grooving | Face slotting, axial grooving |
| GE / WGE | Double-ended, full-radius with chip-breaker | 2.0-5.0 mm | External grooving | Wide groove cutting, economy per edge |
| CTD | Indexable parting | Multi-width | Parting off | Full parting-off with indexable insert |
Need to compare with other brand geometries? See our complete Insert Grade Cross-Reference Tool and SKU Cross-Reference for direct equivalents between Tungaloy, Sandvik, Kennametal, Iscar, Walter, and SECO.
Popular Tungaloy Grades for Grooving
| Grade | Coating / Material | Workpiece | Recommended Speed | Best For Series |
|---|---|---|---|---|
| NS530 | PVD TiAlN nano-laminate | Stainless (M15-M30), high-temp alloys | 60-140 m/min | GR (internal) |
| J740 | PVD TiN/TiAlN multi-layer | Steel (P15-P35), stainless | 80-160 m/min | JTGR, JCGN |
| GH730 | PVD TiAlN sharp edge | Stainless precision (M10-M25) | 100-180 m/min | WGE (3-5mm) |
| T9125 | CVD TiCN/Al2O3 | Steel (P10-P25) | 120-200 m/min | GE series |
| T9225 | CVD TiCN/Al2O3 thick | Steel heavy roughing (P20-P40) | 100-160 m/min | GE series heavy |
Tip: Use our Speeds & Feeds Calculator to dial in the exact cutting parameters for your specific grade, workpiece, and machine setup.
How to Choose a Tungaloy Grooving Insert
Step 1: Match the operation type. External grooving (most common, OD grooves and recesses) → JTGR. Internal grooving (ID grooves on bores) → GR (7/8/9). Face grooving (slots on the end face) → JCGN. Wide grooves 2-5mm with cost-per-edge optimization → GE/WGE (double-ended). Full parting off (cutting completely through the workpiece) → CTD indexable parting line.
Step 2: Match the grade to material. Steel → T9125 or T9225. Stainless → GH730 (precision) or J740 (general). High-temperature alloys → NS530. Cast iron → J740.
Step 3: Match the holder. JTGR/GE/WGE external grooving fits Tungaloy JGHR/L tool holders. GR internal grooving fits Tungaloy EGR boring bars. JCGN face grooving fits Tungaloy CFG face grooving holders. CNCHome-Beyond carries compatible aftermarket holders at 30-50% below OEM — see our complete turning tool holder guide and use the Insert Holder Selector.
Compatible Tool Holders
Tungaloy grooving inserts fit the following CNCHome-Beyond tool holder families (all ISO 5608 standard, drop-in compatible with Tungaloy OEM holders):
- Screw-Clamp Boring Bars — for internal grooving with bar-style holders
- Multi-Lock External Holders — for general external grooving
- Lever-Lock (P-Type) External Holders — for quick-change high-mix production
- Double-Clamp Boring Bars — for heavy-duty interrupted-cut grooving
- Multi-Functional Internal Grooving Holders — for face and ID grooving
- Multi-Functional External Grooving Holders — for face slotting
Need help matching inserts to holders? Use our Insert Holder Selector Tool for a guided 3-step match.
Cross-Brand Equivalents
Tungaloy grooving geometries are dimensionally interchangeable with other major brands. Direct equivalents:
| Tungaloy | Mitsubishi | Sandvik | Kennametal | Iscar |
|---|---|---|---|---|
| JTGR (external grooving) | GY2M | Q5 + MF1 | KGMR | GIMF |
| GR (internal grooving) | MLG | QF + MF2 | KGMN | DGN |
| GE / WGE (double-ended) | MGMN | QF + MF1 | KGMR (double) | DO-GRIP |
| JCGN (face grooving) | GY2M-F | Q5 Face | KGFR | DGFF |
Looking for a Mitsubishi or Sandvik equivalent at lower cost? See Mitsubishi grooving inserts, KORLOY grooving inserts, or Kyocera grooving inserts for direct alternatives, and use our Insert Grade Cross-Reference Tool for grade-to-grade equivalents.
Featured Bestsellers (6)
Tungaloy JTGR Series — External Grooving Workhorse
The JTGR series is Tungaloy's flagship single-ended external grooving line. Available in 1.00mm to 3.30mm widths in 0.05mm increments, JTGR uses the J740 PVD grade and handles 80-160 m/min on steel and stainless. The full-radius chip-breaker geometry provides excellent chip control in narrow grooves. Standard JTGR insert has 2 cutting edges.
- Tungaloy JTGR3300F J740 PVD Coated External Grooving Insert - 3.0mm width
- Tungaloy JTGR3200F J740 PVD Coated External Grooving Insert - 2.0mm width
- Tungaloy JTGR3150F J740 PVD Coated External Grooving Insert - 1.5mm width
Tungaloy WGE Series — Wide Groove Double-Ended
The WGE series is a double-ended external grooving line for 2.0-5.0mm wide grooves. Each insert has 2 cutting edges (vs single-ended JTGR), halving the per-edge cost. Available in T9125 (CVD steel) and GH730 (PVD stainless) grades. Compatible with the Tungaloy JGD/GD-style tool holders.
- Tungaloy WGE30 WGE40 WGE50 T9125 Grooving Inserts (3-5mm) - T9125 grade for steel
- Tungaloy WGE40 GH730 Grooving Inserts (4mm PVD) - GH730 for stainless
- Tungaloy WGE20 GH730 Grooving Inserts (2mm) - GH730 narrow stainless
Frequently Asked Questions
What is the difference between Tungaloy JTGR and WGE series?
JTGR is a single-ended external grooving line with 1 cutting edge per insert, available in 1.0-3.3mm widths. WGE is a double-ended line with 2 cutting edges per insert, available in 2.0-5.0mm widths. JTGR is preferred for narrow precision grooving; WGE is preferred for wider grooves and high-volume production where cost-per-edge matters.
What is Tungaloy GR series (7GR, 8GR, 9GR) used for?
GR series is Tungaloy's internal (ID) grooving line for grooves on the inside of bores. 7GR covers 1.0-2.0mm widths, 8GR covers 1.5-2.5mm, 9GR covers 1.5-3.5mm. All use NS530 PVD grade for stainless steel and high-temperature alloys. Requires a Tungaloy EGR-style boring bar holder with internal coolant for chip evacuation.
What is the difference between J740 and GH730 grades?
J740 is the workhorse PVD grade for general steel and stainless grooving (P15-P35 / M15-M30). GH730 is the premium PVD grade for precision stainless grooving with sharper cutting edge (M10-M25). GH730 produces better surface finish but has shorter tool life than J740 in heavy roughing. For most applications, J740 is the cost-effective choice.
What is the equivalent of Tungaloy JTGR in other brands?
Tungaloy JTGR is the industry-standard single-ended external grooving geometry. Direct equivalents include: Mitsubishi GY2M, Sandvik Q5 + MF1 chip-breaker, Kennametal KGMR, Iscar GIMF, and Walter GX24. All are dimensionally interchangeable on the same external grooving tool holder. For grade cross-reference, see our Insert Grade Cross-Reference Tool.
Can Tungaloy grooving inserts be used for parting off?
Standard JTGR and WGE grooving inserts are designed for grooving and recessing, not full parting off. For full parting-off (cutting completely through the workpiece), use Tungaloy CTD series indexable parting inserts, or the DGN-style parting-off line. The CTD series is included in this collection. For heavy parting off, consider Tungaloy's dedicated TGS / TGSS parting line with stronger cutting edges — contact us for quote.
What is the minimum order quantity for Tungaloy grooving inserts?
Sample orders start at 1 piece for grade validation. Standard production orders are 10-50 pieces per item. Bulk pricing tiers: 2-9 pieces 6% off, 10+ pieces 12% off (auto-applied at checkout). For custom grades not in our standard catalog, MOQ is 200 pieces with 6-8 week lead time from Tungaloy Japan. See our warranty and return policy for details on grade validation samples.
Related Tungaloy Collections
Order Tungaloy Grooving Inserts or Request a Quote
Need a grade or width not in our standard catalog? Send us a part number, grade spec, and quantity — we will return a formal quote within 24 hours. Custom Tungaloy geometries available on 6-8 week lead time.
CNCHome-Beyond — Authorized Tungaloy Distributor. Genuine OEM product, full lot traceability, same-day dispatch from Hangzhou for orders placed before 3 PM China time.
Want to know more about Tungaloy grades, coating technology, or chip-breaker selection? Read our CNC tooling knowledge base or check the complete cross-reference tool for grade-to-grade equivalents.