Engineering Knowledge
Practical guides for cutting tool decisions.
Short, opinionated, technically defensible. Written for machinists, production engineers and purchasing teams who need answers, not marketing.
How to choose turning inserts.
A decision tree from material to insert geometry, grade and chipbreaker. The fastest path from job spec to a defensible tool choice.
Interactive · click any segment
Decode an insert code.
ISO 1832 turning-insert designation
Position 1 · Shape
C — 80° rhombic
The first letter encodes the insert outline. 80° rhomb (C) is the most common for general turning — strong, with 2 usable cutting edges per side.
Other options: C · D · S · T · V · W · R
ISO material groups explained
P, M, K, N, S, H — what each covers and how to identify your workpiece.
How to read an insert code
Decode CNMG / VCMT / DCMT. Shape, clearance, tolerance, hole, size, nose.
CNMG vs WNMG vs DNMG — when to pick which
Strength, edge count and accessibility tradeoffs in real geometries.
Choosing tools for stainless steel
Austenitic vs duplex strategy. Coatings, chipbreakers, vibration control.
Positive vs negative inserts
Cutting forces, edge strength, finish quality. Where each one belongs.
Chipbreaker selection basics
Light, medium, heavy. How feed range maps to chipbreaker family.
Vc, feed and depth of cut basics
The three knobs that drive every job. Safe ranges and tradeoffs.
Coverage map
What we cover — and what we don't.
A neutral platform is only as good as the boundaries it admits to.
check_circle In scope
- Insert and tool selection across ISO P/M/K/N/S/H
- Geometry, grade, coating and chipbreaker reasoning
- Cross-reference and equivalence across major brands
- Vc / feed / depth ranges and operation envelopes
block Out of scope (today)
- Real-time stock or pricing
- Certified independent benchmarks
- Custom CAM post-processor generation
- Machine-tool selection beyond rigidity guidance