TPMN Series Inserts: Full Model Range & Cross References
The TPMN prefix is the first four positions of the ISO 1832 designation — it defines the insert family, identical for every size in the series: 60° triangle · 11° clearance · medium tolerance · No fixing hole, no integral chipbreaker. The numeric positions that follow select inscribed circle, thickness and nose radius; only the full core code is a complete geometry specification.
The catalogued TPMN range on InsertBase spans 4 models: inscribed circle 6.35–12.7 mm, thickness 3.18–4.76 mm, nose radius 0.4–0.8 mm. 4 of 4 models carry cited manufacturer ordering codes. All values on this page are decoded from the ISO 1832 designation or counted from cited catalogue rows — nothing is estimated.
Shape
60° triangle
Triangular insert, 60° cutting edge angle
Clearance
11°
11° clearance
Tolerance
class
Medium tolerance class (as-sintered moulded insert, general turning)
Fixing / chipbreaker
No fixing hole, no integral chipbreaker
TPMN model range
| Designation | IC d1 | Thickness s | Nose rε | Direction | Brand data | |
|---|---|---|---|---|---|---|
| TPMN110308 | 6.35 mm | 3.18 mm | 0.8 mm | neutral | cited | Specs → |
| TPMN160304 | 9.525 mm | 3.18 mm | 0.4 mm | neutral | cited | Specs → |
| TPMN160308 | 9.525 mm | 3.18 mm | 0.8 mm | neutral | cited | Specs → |
| TPMN220404 | 12.7 mm | 4.76 mm | 0.4 mm | neutral | cited | Specs → |
Typical applications by size
- ▸Small IC (≤ 6.35 mm) — finishing, small parts, internal boring and precision cuts.
- ▸Medium IC (9.5–12.7 mm) — general turning, the default range for CNC lathes with the widest holder and chipbreaker choice.
- ▸Large IC (≥ 15.9 mm) — roughing, heavy interrupted cuts and high-feed facing on rigid machines.
Shape-level operations: general turning, chamfering, facing.
How to select within the TPMN series
- ▸Match IC and thickness to the toolholder pocket — the holder catalogue specifies the seat size.
- ▸Nose radius by finish and rigidity: small radii for fine finishing and vibration-prone setups, larger radii for feed and edge strength.
- ▸Choose the chipbreaker suffix for the intended feed band, then the grade for the ISO 513 workpiece group.
- ▸Cross-brand substitution is geometry-safe on the core code; keep chipbreaker and grade matched or verified.
Cross-brand availability
The ISO 1832 TPMN geometry is brand-neutral and is catalogued by the major manufacturers listed on the brands page. Verified full ordering codes and grade mappings are attached to each individual model page as catalogues are processed.
Need verified specs or sourcing for an insert?
Send the ISO code (or a brand ordering number) and your workpiece material. We reply within one business day with the verified specification and original + equivalent grade options — no obligation.