has been proven in many areas of machining non-ferrous
materials and now modern materials such as high silicon
aluminums and glass
filled epoxy resins may now be machined utilizing the
enormous benefits of polycrystalline diamond (PCD) super
abrasive materials. In order to make these super abrasive
cutting materials more 'user friendly', Prima Tooling
manufacture tipped inserts which are interchangeable
with the conventional ISO range of tungsten carbide and
ceramic cutting inserts now found in most machining
environments. Therefore, whenever a change of work piece
may dictate the use of super abrasives, the
appropriately tipped PCD insert may now simply be fitted
to the current tool holders, with minimum machine
In practice the vast majority of
carbide inserts for turning, boring, milling etc. may be
tipped with PCD, to provide the desired cutting
edges. However, very small tips which are impractical may be produced
entirely from a solid disc of PCD to the correct
shape of the insert.
We also offer a recondition service to
re-tip your existing inserts to original specifications.
The following notes are intended as a
guide to selection, price coding and ordering of Prima
Toolings tipped inserts.
PCD may be cost effectively employed
to machine the following broad range of materials:
- Non-ferrous metals and alloys
including, aluminium, copper, bronze, brass, green
tungsten carbide, precious metals and MMC's.
- Non-metallic materials including,
ceramics, reinforced plastics, hard rubber,
chipboard, MDF's and other fibreboards, etc.
PCD may be used for both roughing and
finishing work, although it is usually most beneficial
when tight tolerances or high surface finishes are
required combined with the need for exceptionally long
tool life. It is available in three grades of increasing
crystal size and toughness but with a decreasing of edge quality.
The finest grade is, therefore, only
employed where superior surface finish is the main
objective, the medium grade is the general purpose
material giving long life with good component finishes;
the coarse grade is used where maximum abrasive
resistance is required and where finish is not critical,
for example the machining of metal matrix composites.
Please add grade letter
at end of ISO or ANSI number, F for fine, M for medium,
C for course. e.g CNMA120404 M
Prima Tooling will be pleased to offer
advice on the selection of the best grade of PCD for
your particular application.