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Convex
Knurls (for Axial Feeding) |
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Accu Trak's Inch Series Convex Knurls are TiN Coated and made from Hi-Cobalt Steel
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Accu Trak's Metric Series Convex Knurls are coated with Ferritic Nitro-carburizing (FNC) and made from High Speed Steel |
Our Convex-Axial Feeding knurling wheels have
greatly improved the ability of novice and experienced CNC lathe
operators to produce quality knurled parts on their machines.
All of the inch convex wheels are made from hi-cobalt steel and
have a "TiN" coating. The unique full form radiused
edges of the wheels significantly reduce the knurling forces
in both the "X" and "Z" axis. As compared
to using a standard knurl with a chamfer on the edges, the convex
wheel is similar to a "canoe" slicing through the water
as opposed
to a "pram" plowing through. Also, because of the smaller surface area
on first contact, these tools normally penetrate deeper into the workpiece on
the first revolution which tends to reduce "double tracking" problems.
The above typically results in longer tool life, better looking parts and higher
productivity.
Remember that this type knurling wheel is designed only for axially feeding to
produce a knurl length that is wider than the wheel being used. If the diameter
of the part is less than 1/2", we would normally recommend using a straddle
type two die holder. For work 3/4" and larger, a single or two die bump
should be suitable.
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THESE ARE THE ULTIMATE TOOLS
FOR *AXIAL FEED KNURLING
*for Knurling long pattern feeding tools along the
axis of part
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TOOL IS FEEDING
AXIALLY ON PART
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CONVEX
shaped knurls produce the best finishes
and increase tool life when
AXIAL FEEDING
as shown in the comparison below: |
| POOR:For
axial Feed Knurling the Sharp Corners on the leading edge
of tool see heavy loading, wear rapidly and can break off
in extreme conditions. |
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| BETTER:Beveled
edge spreads out load, but now the leading edge is a blunt
surface requiring higher forces on tool and holder to deform
material. |
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| BEST:CONVEX
full form gives a SPREAD OUT loading on a sharp leading edge
resulting in a smoother precision finish, longer tool life
and lower forces on the holder and spindle bearings. |
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