Collection: TNMG Inserts
TNMG Inserts for CNC machine shops. Browse our full tnmg inserts range. India-wide shipping. Bulk pricing available — message us on WhatsApp for quotes.
TNMG turning inserts — 60° triangle shape, negative rake, double-sided with 6 cutting edges per piece. Economical general-turning insert for steel and cast iron on CNC lathes.
Frequently asked questions
Why pick TNMG over CNMG?
Cost per edge. TNMG has 6 edges (3 corners × 2 faces) vs CNMG 4 edges — so cost per edge is roughly 33% lower at the same sticker price. Downside: 60° triangle point is more fragile than 80° diamond, so TNMG is best for general turning rather than heavy roughing or interrupted cuts.
What toolholder fits a TNMG insert?
TNMG pairs with T__NR/L style holders — most common is MTJNR (93° lead, right-hand). The triangle shape seats with a clamp screw or lever-type mechanism; pick the holder style matching your cutting requirement.
Common TNMG sizes in India?
TNMG160404 / TNMG160408 (general purpose, 20-25 mm shank holders) is the most common. TNMG220408 (heavier finishing and roughing, 25-32 mm shank) is stocked for medium-size work.
Best grade for TNMG on cast iron?
Gray cast iron and ductile iron respond well to K-class grades: Atomix AX3150, Korloy NC3030 / PC5400, Deskar LF9025, Mitsubishi UE6110, TaeguTec TT8115. Dry cutting is standard on cast iron; coated grades last longer.
Does TNMG chip easily?
More than CNMG because of the smaller point angle. Avoid on interrupted cuts, hard materials, and deep shoulder cuts. For those, CNMG or WNMG with their stronger corners last longer despite fewer edges.
