Walter P4840P-8R-E57 WKP25 Pentagon Steel WKP25S
Brand: Walter
Price on request
The Walter P4840P-8R-E57 WKP25S is a professional-grade carbide insert designed for carbon and alloy steel turning. Suitable for CNC lathes with appropriate tool holders. Recommended Vc 200-350 m/min roughing, 300-450 m/min finishing. Use through-coolant or high-pressure coolant for optimal results. Available from Hooguu.com with worldwide shipping and competitive pricing. SKU: P4840P-8R-E57 WKP25S.
Machining Application WKP25
P SteelM Stainless steel
Walter grade — recommended for steel (P), stainless steel (M).
Recommended cutting data
Group P — Carbon & alloy steels
- Low-carbon / structural steel (HB ≤ 200)
Vc: 180–320 m/min; f: 0.10–0.40 mm/rev; ap ≤ 4.0 mm - Alloy / quenched-and-tempered steel (HB 200–330)
Vc: 120–240 m/min; f: 0.10–0.35 mm/rev; ap ≤ 3.0 mm
Raise Vc for continuous cuts; lower it and pick a tougher chipbreaker for interrupted cuts.
Group M — Stainless steel
- Ferritic / martensitic (HB ≤ 220)
Vc: 120–200 m/min; f: 0.08–0.30 mm/rev; ap ≤ 3.0 mm - Austenitic 304 / 316 (work-hardening)
Vc: 90–160 m/min; f: 0.08–0.25 mm/rev; ap ≤ 2.5 mm
Flood coolant; avoid too low a feed to prevent work hardening.
Figures are general reference ranges by ISO material group — adjust for tool geometry, machine rigidity and cooling. For exact recommendations refer to the manufacturer's data or contact us for a quote.
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We accept
| Brand | Walter |
|---|---|
| Part No. (MPN) | P4840P-8R-E57 |
| Grade | WKP25S |
| Shape | Pentagon |
| Suitable Material | Steel |
| Category | Pentagon (PNMA) |
What Buyers Say
★★★★★
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★★★★★
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★★★★★
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★★★★★
the product is like show in the picture
★★★★★
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