Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

SUMITOMO Triangle Turning Insert: TPMN321 - Triangle (T) Indexable Turning Inserts
SUMITOMOTriangle (T) Indexable Turning Inserts

SUMITOMO Triangle Turning Insert: TPMN321

The SUMITOMO Triangle Turning Insert, model TPMN321 (also designated TPMN160304, MPN TPMN321-AC8025P), is a triangle (T) indexable turning insert. It is specified with attributes TPMN321 and TPMN160304.

SKU 3G-OTH-324364

Also listed as: TPMN321AC8025P · TPMN321 AC8025P

Brand
SUMITOMO
Item
Triangle Turning Insert: TPMN321
Category
Triangle (T) 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 — 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
TPMN321-AC8025P

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 Triangle Turning Insert, model TPMN321 (also designated TPMN160304, MPN TPMN321-AC8025P), is a triangle (T) indexable turning insert. It is specified with attributes TPMN321 and TPMN160304.

Frequently Asked Questions

What is the SUMITOMO TPMN321 triangle turning insert used for?

The SUMITOMO TPMN321 (also TPMN160304) is a triangle indexable turning insert used for general turning, facing, and profiling operations on metal workpieces. It is commonly applied in automotive, aerospace, and general machining industries where reliable cutting geometry and edge strength are required.

What are the specifications of the SUMITOMO TPMN321 turning insert?

The SUMITOMO TPMN321 insert is designated as TPMN321 and TPMN160304, with manufacturer part number TPMN321-AC8025P. It is a triangle (T) indexable turning insert. The AC8025P grade is a SUMITOMO coating designed for steel and stainless steel machining. Always verify dimensions against your tool holder.

Where to buy SUMITOMO TPMN321 turning inserts worldwide?

You can source SUMITOMO TPMN321 turning inserts worldwide through 3G Electric, a global industrial equipment distributor established in 1990. We handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time. We supply genuine SUMITOMO inserts.

How to select the correct SUMITOMO triangle turning insert for my operation?

Select the SUMITOMO TPMN321 insert based on your workpiece material and operation. The AC8025P grade suits steel and stainless steel turning. Ensure your tool holder accepts TPMN321 (TPMN160304) geometry. Match the insert's inscribed circle and thickness to your holder's pocket. Consult SUMITOMO's grade selector for optimal cutting parameters.

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 triangle (t) 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 Triangle Turning Insert: TPMN321, TPMN160304 (MPN TPMN321-AC420K)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMN321, TPMN160304 (MPN TPMN321-AC420K)
SUMITOMO Triangle Turning Insert: TPMN323, TPMN160308 (MPN TPMN323-AC420K)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMN323, TPMN160308 (MPN TPMN323-AC420K)
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-AC420K)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-AC420K)
SUMITOMO Triangle Turning Insert: TPMR321ENF, TPMR160304N-SF (MPN TPMR321ENF-AC8025P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMR321ENF, TPMR160304N-SF (MPN TPMR321ENF-AC8025P)
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-AC8025P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-AC8025P)
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-ACP200)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMN322, TPMN160308 (MPN TPMN322-ACP200)

More from SUMITOMO

View all SUMITOMO parts
SUMITOMO Triangle Turning Insert: TRM551708GU, TRM551708-GU (MPN TRM551708-GU-AC8025P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TRM551708GU, TRM551708-GU (MPN TRM551708-GU-AC8025P)
SUMITOMO Triangle Turning Insert: TNMG433EMX, TNMG220412N-MX (MPN TNMG433EMX-AC820P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TNMG433EMX, TNMG220412N-MX (MPN TNMG433EMX-AC820P)
SUMITOMO Triangle Turning Insert: TPGT221LFY, TPGT110304L-FY (MPN TPGT221LFY-T1500Z)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPGT221LFY, TPGT110304L-FY (MPN TPGT221LFY-T1500Z)
SUMITOMO Triangle Turning Insert: TNMG323ENZ, TNMG160312N-UZ (MPN TNMG323ENZ-AC830P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TNMG323ENZ, TNMG160312N-UZ (MPN TNMG323ENZ-AC830P)
SUMITOMO Triangle Turning Insert: TCMT32.51ENK, TCMT16T304N-SK (MPN TCMT32.51ENK-AC830P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TCMT32.51ENK, TCMT16T304N-SK (MPN TCMT32.51ENK-AC830P)
SUMITOMO Triangle Turning Insert: TPGG220.5L, TPGT110302L-SD (MPN TPGG220.5L-T1500Z)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPGG220.5L, TPGT110302L-SD (MPN TPGG220.5L-T1500Z)
SUMITOMO Triangle Turning Insert: TNMG432EME, TNMG220408N-ME (MPN TNMG432EME-AC830P)
SUMITOMO
SUMITOMO Triangle Turning Insert: TNMG432EME, TNMG220408N-ME (MPN TNMG432EME-AC830P)
SUMITOMO Triangle Turning Insert: TPMR322EFK, TPMR160308N-FK (MPN TPMR322EFK-T1500A)
SUMITOMO
SUMITOMO Triangle Turning Insert: TPMR322EFK, TPMR160308N-FK (MPN TPMR322EFK-T1500A)