Carbide Tips: What are the throw away carbide tips?, What are their advantages?, What are the basic requirements?

Carbide Tips:

What are the throw away carbide tips and What are their advantages?

Throw away Carbide tips are made in a variety of shapes and vary in thickness from 3mm to 12mm and size from 10 to 15mm2 (mm square). Proper arrangements in the form of holes etc are made to secure them on the tool holders.

Positive rake Carbide tips have 3 or 4 cutting edges, which are ground to produce 5 to 8 0 relief angle. These can be used individually before tip becomes unusable.

In negative rake Carbide tips, the relief angle in created by placing them suitably on the tool holder. These thus have the advantage of providing 6to 8 usable edges, because all the edges are prepared at right angles. However the second side of the tip can be used only if the first side has not become rough due to wear as otherwise it can’t be flat against the loading surface on the tool holder.

Throw away Carbide tips are quite cheap and as 4 to 6 edges can be used before it is thrown, there is lot of economy in using them.

What are the basic requirements?

The basic requirements of Carbide tips are: A pocket on the tool holder to locate the carbide tip positively and take the side longitudinal and end radial thrust from the cutting forces and also to ensure that new tip will cut to the same size.

I. A solid seat for the bottom of the carbide tip to take the tangential force and also to ensure that new tip will cut to the same size.

II. A clamp to hold the tip formally against the bottom of the pocket and it form being pulled out. 

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