Compare

Side-by-side technical matrix.

Match three inserts on the variables that actually drive a decision: geometry, grade, ISO coverage, operation envelope, tool life, cost tier and risk.

info Sample comparison — always verify on a sample part before production

Sandvik Coromant

GC4325

CNMG 120408-PM

BASELINE

Kennametal

KCP25C

CNMG 432 MP

NEAR EQV.

Walter

WPP20S

CNMG 120408-NM4

PREMIUM
Geometry
80° rhomb · negative · CNMG
80° rhomb · negative · CNMG
80° rhomb · negative · CNMG
Grade
GC4325 CVD Ti(C,N)+Al₂O₃
KCP25C multilayer CVD
WPP20S Tiger·tec Silver CVD
Coating
CVD
CVD
CVD multilayer
ISO material group
ISO PISO M
ISO PISO M
ISO P
Operation
Medium turning
Medium turning
Medium-heavy turning
Vc envelope scale 150–450 m/min
200360 m/min
190340 m/min
220400 m/min
Feed envelope scale 0.10–0.60 mm/rev
0.150.50 mm/rev
0.150.45 mm/rev
0.180.55 mm/rev
Depth envelope scale 0–6 mm
0.54.0 mm
0.54.0 mm
0.55.0 mm
Interrupted cut
Good
Acceptable
Good
Tool life 5-point relative
High
Medium-High
High unmanned
Cost tier
€€€€€ 3/5
€€€€€ 2/5
€€€€€ 4/5
Risk level
Low
Low-Medium
Low
Best use case
Production turning of P-group
Cost-balanced general turning
Long unmanned P-group runs
Avoid when
Heavy interrupted cuts
Continuous high-Vc runs
Cost-sensitive short runs

Operating envelope

Where each tool lives in Vc × feed space.

Each rectangle shows the manufacturer's published Vc / feed envelope. Overlap means equivalent performance; non-overlap shows where one tool extends further.

GC4325 KCP25C WPP20S
0.1 0.2 0.3 0.4 0.5 0.6 100 200 300 400 Feed (mm/rev) Cutting speed (m/min) WPP20S GC4325 KCP25C +12% Vc headroom

Widest envelope

WPP20S — highest Vc and feed reach

Balanced center

GC4325 — overlaps both alternatives

Tightest fit

KCP25C — narrowest envelope, lowest cost

Final recommendation

Picks by priority.

A clear best-of for each common decision goal. Always validate on a sample part before locking in production.

Best for productivity

WPP20S

Highest Vc envelope and tool life for unmanned P-group runs.

Best for cost

KCP25C

Lowest cost tier with full P/M coverage and acceptable risk.

Best for stainless

GC4325

Strongest published M-group performance; PM chipbreaker.

Safest general choice

GC4325

Widest envelope, lowest risk note, broadest field validation.

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