We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

SUMITOMO Square Turning Insert: SPMN423 - Square (S) Indexable Turning Inserts
SUMITOMOSquare (S) Indexable Turning Inserts

SUMITOMO Square Turning Insert: SPMN423

The SUMITOMO Square Turning Insert, model SPMN423 (MPN SPMN423-AC420K), is a square (S) indexable turning insert. It is also referenced as SPMN120312. This product is designed for turning operations.

SKU 3G-OTH-229233

Also listed as: SPMN423AC420K · SPMN423 AC420K

Brand
SUMITOMO
Item
Square Turning Insert: SPMN423
Category
Square (S) Indexable Turning Inserts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SUMITOMO
Manufacturer Part Number
SPMN423-AC420K

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The SUMITOMO Square Turning Insert, model SPMN423 (MPN SPMN423-AC420K), is a square (S) indexable turning insert. It is also referenced as SPMN120312. This product is designed for turning operations.

Frequently Asked Questions

What is the SUMITOMO SPMN423 square turning insert used for?

The SUMITOMO SPMN423 (SPMN120312) is a square indexable turning insert designed for general turning operations on lathes. It is commonly used in metalworking to shape workpieces, reduce diameter, or create smooth finishes across industries such as automotive, aerospace, and general machining.

What are the specifications of the SUMITOMO SPMN423 turning insert?

The SUMITOMO SPMN423 turning insert has a square (S) shape and is referenced as both SPMN423 and SPMN120312. The manufacturer part number is SPMN423-AC420K. It is an indexable insert for turning applications, with dimensions corresponding to the SPMN423/SPMN120312 standard.

Where to buy SUMITOMO SPMN423 turning inserts worldwide?

3G Electric supplies SUMITOMO SPMN423 (SPMN423-AC420K) square turning inserts to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this SUMITOMO insert.

How to select the correct SUMITOMO turning insert for a lathe?

To select the correct SUMITOMO turning insert like the SPMN423, match the insert shape (square), size (SPMN423/SPMN120312), and grade (AC420K) to your workpiece material and operation. Consult the lathe tool holder compatibility and cutting parameters. 3G Electric can help you source the right SUMITOMO insert for your application.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
SUMITOMO Square Turning Insert: SPMN422, SPMN120308 (MPN SPMN422-AC8025P)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN422, SPMN120308 (MPN SPMN422-AC8025P)
SUMITOMO Square Turning Insert: SPMN421, SPMN120304 (MPN SPMN421-AC415K)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN421, SPMN120304 (MPN SPMN421-AC415K)
SUMITOMO Square Turning Insert: SPMN422, SPMN120308 (MPN SPMN422-AC420K)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN422, SPMN120308 (MPN SPMN422-AC420K)
SUMITOMO Square Turning Insert: SPMN421, SPMN120304 (MPN SPMN421-AC420K)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN421, SPMN120304 (MPN SPMN421-AC420K)
SUMITOMO Square Turning Insert: SPMN321, SPMN090304 (MPN SPMN321-AC420K)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN321, SPMN090304 (MPN SPMN321-AC420K)
SUMITOMO Square Turning Insert: SPMN321, SPMN090304 (MPN SPMN321-AC415K)
SUMITOMO
SUMITOMO Square Turning Insert: SPMN321, SPMN090304 (MPN SPMN321-AC415K)

More from SUMITOMO

View all SUMITOMO parts
SUMITOMO Square Turning Insert: SNMG432EEG, SNMG120408N-EG (MPN SNMG432EEG-AC8025P)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG432EEG, SNMG120408N-EG (MPN SNMG432EEG-AC8025P)
SUMITOMO Square Turning Insert: SNMG432ESU, SNMG120408NSU (MPN SNMG432ESU-T1500A)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG432ESU, SNMG120408NSU (MPN SNMG432ESU-T1500A)
SUMITOMO Square Turning Insert: SNMG431EEX, SNMG120404N-EX (MPN SNMG431EEX-AC5015S)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG431EEX, SNMG120404N-EX (MPN SNMG431EEX-AC5015S)
SUMITOMO Square Turning Insert: SNMG432EEG, SNMG120408N-EG (MPN SNMG432EEG-AC6040M)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG432EEG, SNMG120408N-EG (MPN SNMG432EEG-AC6040M)
SUMITOMO Square Turning Insert: SNMG433ENZ, SNMG120412N-UZ (MPN SNMG433ENZ-AC820P)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG433ENZ, SNMG120412N-UZ (MPN SNMG433ENZ-AC820P)
SUMITOMO Square Turning Insert: SNMG433EMU-AC5025S, SNMG120412N-MU
SUMITOMO
SUMITOMO Square Turning Insert: SNMG433EMU-AC5025S, SNMG120412N-MU
SUMITOMO Square Turning Insert: SNMG644EMU, SNMG190616NMU (MPN SNMG644EMU-AC810P)
SUMITOMO
SUMITOMO Square Turning Insert: SNMG644EMU, SNMG190616NMU (MPN SNMG644EMU-AC810P)
SUMITOMO Square Turning Insert: SNMG544EMU-AC5025S, SNMG150616N-MU
SUMITOMO
SUMITOMO Square Turning Insert: SNMG544EMU-AC5025S, SNMG150616N-MU