CBN Turning inserts

[knutselaar0]

i've acquired a lot of CBN turning inserts, with 1 / 2 or 4 cutting edges
Before i post some pictures, i want to ask the members if they are interested
The inserts are slightly used, but still in very good condition, no wear on the cutting edges
Different types available
See pictures below
Price:
Inserts with 1 tip = US$3 marked with 1P
Inserts with 2 tips = US$5 Marked with 2P
Inserts with 4 tips = US$8 Marked with 4P ( these are negative cutting inserts)
Shipping not included!
Up to 100 grams = US$5( +/- 10 pieces)
Up to 350 grams = US$10

CBN is the second hardest known material in the world; the hardest being diamond. This, in addition to many other extreme properties makes it the ideal cutting tool material for hard, abrasive workpieces. CBN has greater chemical and thermal stability than diamond, which dissolves in iron and has a maximum temperature limit of approximately 700°C (1300°F).
In contrast, CBN is chemically inert in ferrous materials and retains its hardness at temperatures in excess of 1000°C (1800°F) which is typical for HPT.

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[knutselaar0]

Wear on these is often small when used and you can retouch them with a very fine grit diamond wheel on your hand grinder.
They always need a edge prep, T-land preferred but you can do this with a diamond stone.
Very long life stuff. Great in hard throws fire stuff (it loves heat), excels in cast iron, and works in soft metals at low speeds when needed.
Big advantage goes to no size adjust, downside is price tag and chipbreaker/postive cut as most are true negatives.
All big production shops use CBN in cast iron or hard turning.
They do chip even more than carbide if used wrong.
Everyone should have a few CBN tips for that "just won't cut stuff" we all get.