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For
best results, inserts should be cut in Wire
EDM fixture.
*Note:
5/16 x 3/4 blanks are used for 5/16 x 3/8
inserts.
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If
in doubt, you can order two or three different
materials within a set of three inserts for
comparison purposes.
Order
inserts by catalog number according to grade you
select.
Somma
can supply the blanks for EDMing at your facility or Somma
can supply the finished form insert if you send us your
part print. Prices on application.
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To assist you in selecting appropriate insert material for your application, it has been our experience that the following grades usually give the best
results.
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BRASS:
76 HIGH SPEED STEEL (FOR
LONG RUNS: C2 MICROGRAIN CARBIDE)
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ALUMINUM,
COPPER, BRONZE: C2 MICROGRAIN
CARBIDE
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FERROUS
MATERIALS: 76PM HIGH SPEED STEEL
OR C2 MICROGRAIN CARBIDE OR C6 MICROGRAIN
CARBIDE. NOTE: ADD TIN COATING
FOR EVEN BETTER LIFE.
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All
of these insert materials have been used
successfully on steel, however, depending on the
material being cut and the surface feet
workpiece is being machined at, cutting tool
material performance will vary according to feed
rates, machine condition, coolant, job layout
and type and condition of material being
cut. Therefore, we can not be responsible
for unsatisfactory performance of inserts due to
type material selected.
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Somma can
EDM your inserts with Top to Bottom Clearance |
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Top to bottom clearance reduces
side rubbing and tool wear.
Adaptable for "Datum Point" Applications |
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Important!!
All of our inserts are designed with front to back clearance on vertical faces.
However, in some instances, side rubbing on these faces causes excessive insert wear and rough finishes on the face surfaces of the
workpiece.
We can
supply formed inserts with top to bottom clearance (see diagram) that reduces side rubbing, improves part finish and increases insert resharpenable life by reducing the amount of material that has to be removed with
resharpening.
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| Top to bottom clearance will cause workpiece width dimensions to change as the top of the insert is resharpened. In order to obtain maximum resharpenability of inserts, the clearance angles will be determined by the total allowable (+ or -) width tolerance of the
workpiece.
This means that the workpiece width dimensions will change as the insert is resharpened but will always be within the allowable (+ or -) tolerance. |
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THROWAWAY
QUICK
CHANGE FORM AND SHAVE TOOL INSERTS
Prices on
application for inserts EDM'd to your part print.
EDM
READY (THROWAWAY) BLANKS FOR THOSE WITH EDM
FACILITIES
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Inserts
are ground to 1/8" thickness only.
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Blanks
are oversize on width and length for EDMing.
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Blanks
are recessed on back end for mounting in EDM
fixture.
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Throwaway
Insert |
Back-Up Anvil |
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