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Click
here for Reference Library of Industry Guidelines
Click
here for Jointer Stones 101
Click here
for Jointing Stones Recommendation Chart
 JOINTING
CARBIDE KNIVES 101
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There
is more than one way to properly joint carbide knives. All
techniques described below are assuming either carbide inlay knives
or BAK-PAK® type knives are being jointed.
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Selection
of Jointing Stone |
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As
in grinding, individual operator techniques will greatly influence
which stone will work. Here are some parameters for proper
stone selection. In general, silicon carbide stones work
better on machines with 3,600 RPM spindle speed. On 6,000
RPM machines; depending upon your application, either silicon
carbide or a specialized aluminum oxide stone can be used.
Since each application is slightly different, a few different
stones may have to be used to determine the best stone for your
application. Please call Wood Tech Enterprises, Inc. customer
service department at 1(800)TOOLING (866-5464) to help determine
what stone will work best for you.
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Preparation
of the Jointing Stone |
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First,
layout the stone using the pattern knife to be jointed.
It is most important to maintain as accurate a mirror image fit
as possible to the profile being jointed, as the jointing stone
will in effect re-profile the knife if not properly formed. Now
pre-shape the stone as accurate a fit as is possible.
Taper the stone on both sides at a 45° angle. This angle
allows faster chipping-in of the stone. Insert the stone
into the holder on the machine, and chip the stone in for exact
fit. The use of only one knife in the chipping-in process
results in a better fit. After the stone is chipped-in to
fit, start the spindle and bring the stone into the knife at a
slow to moderate speed. One technique is to bring the stone
in and out in 1 second intervals, making minor adjustments at
each interval. Another technique is to bring the stone in
and hold it in slight contact with the knives. Depth control
adjustments are made while contact is being made. This technique
is tricky as extended time of contact can cause the stone to glaze
or the carbide to overheat and crack.
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Please
remember the following: |
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- Different
grades of carbide joint differently.
- Proper
fit of stone to knife is mandatory.
- Jointing
of carbide is tricky; please allow time for trial and error to
learn the technique which works best for you.
- As
in any joint stone forming process, use ONLY a wheel to form the
stone that has not been used to grind ANY knives. Using a
grinding wheel that has been in contact with knives will result
in small metal particles being impregnated into the jointing stone.
This foreign matter will adversely affect the stone performance
by nicking the knives.
To
reach a friendly voice, call during our hours of operation:
Monday through Friday, 9 a.m. to 6 p.m. EST
(Eastern Standard Time)
Wood Tech Enterprises
Our website: www.woodtechtooling.com
P.O. Box 2226
Fairview, NC 28730 USA
1-800-TOOLING (866-5464)
Phone: 828-628-4414
Fax: 828-628-4490
Shipping Address:
15 Khristy Scott Lane
Fairview, NC 28730 USA
Copyright © 1998-2011 Wood Tech Enterprises, Inc. All Rights
Reserved. Designated trademarks and brands are the property of their
respective owners. Wood Tech is not responsible for typographical
errors. Prices are subject to change. All prices are in U.S. Dollars.
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