28 pcs Soviet CBN Cutting Tool Inserts 4x4x4 mm Boron Nitride Composite

Condition: New

28 pcs Soviet CBN Cutting Tool Inserts Ø4x4x4 mm – Boron Nitride Composite USSR

Set of 28 vintage Soviet cutting inserts made from superhard composite material based on cubic boron nitride (CBN / Композит).
Manufactured in the USSR for metalworking and precision machining applications.
Specifications:
Material: Cubic Boron Nitride Composite (CBN)
Quantity: 28 pieces
Diameter: 4x4 mm
Height: 4 mm
Origin: USSR / Soviet Union
Condition: New old stock (NOS) / unused storage condition
These inserts were used for machining hardened steels, cast iron, and other difficult-to-machine materials. Soviet superhard composites are known for durability and wear resistance.
Suitable for collectors, machinists, toolmakers, and industrial use.
Package includes:
28 × CBN inserts
Notes:
Please check dimensions carefully before purchase.
You will receive exactly what is shown in the photos.
Vintage Soviet industrial tooling.
Keywords:
CBN insert, boron nitride, Soviet tooling, USSR tools, cutting insert, lathe tool, superhard material, composite insert, machinist tools, metalworking.

Please Note:

All items are shipped directly from Ukraine, so delivery may take a little longer than domestic shipping. Every order is carefully packed, and tracking is provided whenever available.
My VAT registration is currently being processed and will be available soon.
I specialize in new old stock (NOS) industrial tooling, including a large selection of made in the USSR tools, as well as premium tools from Germany, Japan, the USA, Italy, and other leading manufacturers.
I offer a wide range of drills, taps, dies, end mills, reamers, centre drills, countersinks, measuring tools (micrometers, calipers, gauges), and many other metalworking tools.
I have a very large inventory, and not everything is listed yet. If you are looking for a specific tool, please send me a message—I may already have exactly what you need.
A large shipment of tooling will soon be transferred to Ireland, making many popular items available for faster local delivery. This includes drills, taps, dies, end mills, reamers, centre drills, countersinks, and measuring instruments. If you're interested in any of these products, feel free to get in touch now.

Thank you for your interest, and I look forward to helping you find the right tooling for your needs.