About 60° Triangle Inserts (T-Style)

The ISO 1832 T-shape family delivers a 60° included-angle cutting edge — the strongest geometry in turning, with the largest nose radius per IC size. Mitsubishi's 60° lineup covers two clearance variants:

• TC (7° negative rake) — Strong cutting edge for roughing steel, stainless, and cast iron. Compatible with standard negative turning holders (MTJNR/L, PTFNR/L, etc.).
• TP (11° positive rake) — Sharp edge, low cutting force, ideal for finishing, profiling, and slender shaft work. Less common rake than 7° but chosen for specific geometries (TPGH/TPGX for profiling, TPMH for boring).

Each clearance family branches into three chip-breaker variants: G (one face chip-breaker, sharp edge), M (chip-breaker on both faces, double-edged economy), and W (no chip-breaker, used as brazed or flat profiling edge). Combined with three tolerance classes — G (ground periphery), M (precision molded), X (sharp-ground for aluminum) — Mitsubishi offers 7 distinct T-style SKUs to cover profiling, semi-finishing, finishing, and boring.

Browse by Application & Grade

All 100 60° triangle SKUs are grouped below by application and grade. Click any category to filter the full catalog.

By Workpiece Material

• Steel Turning (P-grade) — VP15TF, UE6020, UE6110, US735
• Stainless Steel (M-grade) — US735, VP15TF
• Cast Iron (K-grade) — UC5115, UTI20T
• Aluminum & Non-Ferrous (N-grade) — HTI10, F7030
• Finishing & Mirror Surface — NX2525 (cermet), VP15TF (PVD)

By Operation

• Roughing (heavy depths > 3 mm) — TPMN, TCMT with N/M tolerance
• Semi-Finishing — TCMT, TPGH with M-class chip-breakers
• Finishing / Profiling — TCGT, TPGH, TPGX with G-class chip-breaker
• Internal Boring — TPMH-MV/FV (specifically designed for boring bars)
• Aluminum Profiling (Sharp Edge) — TPGX-HT, TCMW-HT, TCGT-F

By Carbide Grade

• CVD Steel (P-grade) — US735 (1st gen), UE6020/UE6110 (2nd gen, P20-P30)
• PVD Universal (Miracle Coat) — VP15TF (Al-rich, P10-P25, M10-M25, S10-S20)
• CVD Cast Iron (K-grade) — UC5115 (K05-K20)
• Cermet (Finishing) — NX2525 (P05-P15, mirror surface)
• Uncoated Carbide — HTI10 (aluminum N10-N25), UTI20T (cast iron roughing K15-K30)

How to Choose the Right 60° Triangle Insert — 3-Step

Step 1 — Identify the Operation

• Roughing / heavy depths (> 3 mm): Choose TC-class (TCMT, TCGT) with N-tolerance or M-class chip-breaker. Negative rake handles higher feed rates.
• Finishing / profiling / boring: Choose TP-class (TPGH, TPGX, TPMH-MV). Positive 11° rake reduces cutting force and improves surface finish.
• Aluminum / non-ferrous: Choose TPGX-HT (X tolerance, uncoated HTI10) for sharp edge retention.

Step 2 — Match the Grade to Workpiece

• Steel (P-grade): UE6020 / UE6110 (CVD 2nd gen) for general use, US735 for stainless, VP15TF for finishing or universal application.
• Cast iron (K-grade): UC5115 (CVD coated) or UTI20T (uncoated heavy).
• Aluminum (N-grade): HTI10 (uncoated sharp edge). F7030 (PVD aluminum-specific) also stocked for some series.
• Mirror finishing: NX2525 cermet (TPGH / TPGX / TPMN grades).

Step 3 — Verify Holder Compatibility

• TC (60° negative): Use negative turning holders — Lever Lock System External Holder, Double Clamp System External Holder, or Multi-Lock System External.
• TP (60° positive): Use positive turning holders with 60° lead angle (PTTNR/L for TPG-style, or boring bars for TPMH-MV).
• Internal boring (TPMH-MV): Use boring bars with T-style pockets (e.g., Screw-On System Boring Bar with T insert pocket).

Frequently Asked Questions

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