AW #131.pdf - Karatunov.net

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Use a router table and a mortis-
ing bit (see Source, below).
You'll get very flat surfaces that only need a little
sanding. If you use a down-shear mortising bit, the
edge of the raised section will be crisp and clean, without
any splintering (see photo, below left). A bit's shear angle is
the angle of the cutting edge relative ro the shaft. The slanted
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cutting edge of a down-shear bit (see photo,
at right) forces chips to travel towards the
bit's tip. On a router table, the shear angle
forces chips up, away from the raised edge.
Mortising bits are alailable in a wide vari-
ety of diameters, from l/2 in. to 7-l/2 in.
They're also arailable with or without bear-
ings. You don't need a bearing to make
Making flat raised panels with my
dado set leaves an uneven surface.
ls there some better way?
raised panels, but bis with bearings are more versatile. Bearings
are useful for tracing around hinge mortise and other templates.
Source : Freud, (800) 47 2-7 307, www.f reudtools.com
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t I The jaws of my new vise aren't parallel,
V top to bottom. ls this OK?
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/-f Your vise is.just fine. This design ensures that a
J- I board doesn't wiggle when you righten the vise.
The lean in your vise's outerjaw is called toe-in. Toe-
in corrects for upanddown play in the guide bars.
As you tighten a vise, the guide bars tend to angle
down, so they're lower in front than in back. This
makes the outerjaw lean away from the innerjaw.
Toe-in compensates for that lean. When you
tighten a vise with toe-in, the outer jaw becomes
parallel to the innerjaw. It puts even pressure along
the entire surface of your workpiece, which is exact-
ly what you want.
If your vise doesn't have toe-in, or the toe-in is
inadequate, plane the outerjaw's wooden face so it's
thicker at the top than at the bottom. That creates
the lean you'll need to hold work more securely.