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SUMITOMO SPMR421ENF-AC820P Square Indexable Turning Insert - Square (S) Indexable Turning Inserts
SUMITOMOSquare (S) Indexable Turning Inserts

SUMITOMO SPMR421ENF-AC820P Square Indexable Turning Insert

The SUMITOMO Square Turning Insert, model SPMR421ENF (MPN SPMR421ENF-AC820P) and SPMR120304N-SF, is a square (S) indexable turning insert. It is available in two part numbers: SPMR421ENF and SPMR120304N-SF.

SKU 3G-OTH-229242

Also listed as: SPMR421ENFAC820P · SPMR421ENF AC820P

Brand
SUMITOMO
Item
SPMR421ENF-AC820P Square Indexable Turning Insert
Category
Square (S) Indexable Turning Inserts
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SUMITOMO
Manufacturer Part Number
SPMR421ENF-AC820P

Technical Documents

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SUMITOMO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SUMITOMO Square Turning Insert, model SPMR421ENF (MPN SPMR421ENF-AC820P) and SPMR120304N-SF, is a square (S) indexable turning insert. It is available in two part numbers: SPMR421ENF and SPMR120304N-SF.

Frequently Asked Questions

What is the SUMITOMO Square Turning Insert SPMR421ENF used for?

The SUMITOMO Square Turning Insert SPMR421ENF is used for general turning, facing, and profiling operations on metal workpieces. Its square (S) shape provides four cutting edges for cost-effective machining. It is commonly applied in automotive, aerospace, and general engineering industries for medium to finishing cuts on steel and cast iron.

What are the specifications of the SUMITOMO SPMR421ENF insert?

The SUMITOMO SPMR421ENF insert is a square indexable turning insert with part numbers SPMR421ENF and SPMR120304N-SF. The manufacturer part number is SPMR421ENF-AC820P. It features an AC820P grade for wear resistance. The insert is designed for secure clamping and consistent chip control in turning applications.

Where to buy SUMITOMO turning inserts worldwide?

You can source SUMITOMO turning inserts worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We provide genuine SUMITOMO inserts without claiming authorized distributor status.

How to select the correct SUMITOMO square turning insert?

To select the correct SUMITOMO square turning insert, match the insert size (e.g., SPMR421ENF or SPMR120304N-SF) to your tool holder's pocket. Consider the workpiece material and cutting conditions. The AC820P grade is suitable for steel and cast iron. Consult the manufacturer's catalog for feed and speed recommendations. 3G Electric can assist with sourcing.

Used in

Common applications for SUMITOMO
Automotive engine block machining — Sumitomo SNMG square turning inserts for facing and boring cast iron
Aerospace component turning — Sumitomo DNMG diamond inserts with UP chipbreaker for finishing titanium alloys
Oil and gas valve production — Sumitomo TPMR triangle inserts with T1500Z grade for threading stainless steel
General engineering shaft turning — Sumitomo CNMG diamond inserts with LU chipbreaker for medium interrupted cuts
Mold and die finishing — Sumitomo VNMG diamond inserts with UZ chipbreaker for hardened steel profiling
Heavy equipment repair — Sumitomo TCMT triangle inserts with AC810P grade for turning wear-resistant steels

SUMITOMO Products

3G Electric supplies SUMITOMO square (s) indexable turning inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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