On 6/4/2011 2:11 PM, email@example.com wrote:
Actually my concern is how short the guide bar is when the gauge is
behind a wide board, Length of the fence is not a concern. The Incra
miter gauges have Incradabley short guide bars, as much as 8" shorter
than some of the competition.
I thought they were short too, but with the adjustments they fit extremely
well. I don't think making them longer would be much of an improvement. With
the 'T' slot tang on the front it would just be an incentive to bend it. ;-)
That is mighty generous of you sir. Thank you.
Here is what I am thinking. I try not to cut anything with the miter
gauge that would require the gauge fence to go behind the front edge of
The 1000 series have pretty shore guide bars. My concern is that the
guide bar might not wobble left or right a bit until the rest of the
track feeds into he fence. Basically can the miter gauge be wiggled
back and forth when half the of the guide bar is not engaged with the
I'll check tomorrow and report.
To review, aside from the terminal metal T on the guide
bar there are split Teflon washers adjustable by machine
screws. Mine are expanded for a snug fit that does not
impede bar movement and, hopefully, won't invite
their rapid wear.
Because vertical play might be a subsequent question,
I'll load the unit with a wider board in your check position
, as well as noting unloaded performance.
Frankly, the basic miter assembly original to the machine
was good and memory says it has a guide bar
of similar length to the Incra, without the final T.
That will win a trial too for comparison.
One of the books I swallowed recently suggests remedies
for tightening simple guide bars worth note. A drill press
would be advisable as an installation tool.
At equidistant points
spaced alternately on both sides along the center line of
the guide bar thickness, drill and install Teflon or brass
screws. Cut off the heads. Turn them in with a pliers/vice
grip until they fit into the miter bar slot and evenly protrude
according to your preference for the degree of snugness
desired. Sounds like a snappy approach to a worn
Now I realize that the Incra probably has a guide bar slot adjustment
just ahead of the fence position and farther forward towards the end of
the bar. How many in the span I do not know, and I am not going to
argue with your results as you have the proof and I only have
speculation to the possible results. Generally speaking the more guide
bar adjustments the less likely that there will be any left/right
pivoting. The 1000 series has 6 adjustments which seems adequate if
they are all on one side of the bar. If there are three on one side and
three on the other maybe not as good. Anyway with approximately half
of the adjustments behind the fence you potentially loose half the slop
Now having said that Incra had been making these things for a long time
and one would think that my concerns are a non issue. But then again
the Osbourne miter gauge had been around a while but still as observed
on Friday the latest version continues to have lots of slop when the
gauge is set on the left side miter slot, the gauge is set to 45 degrees
with the telescoping adjustment mechanism extend to its farthest point.
The opposite 45 degree setting is nice and tight but that telescoping
bar is not fully extended for that particular 45 degree setting. A
sales guy at Woodcraft was showing mt the Osbourn and I told him that I
thought the Osbourn was a pretty good gauge except for that one deal
killer inherent flaw. He said that he uses and owns the Osbourn miter
gauge and then I told him about the problem and "showed" him how the
gauge has that slop problem. The look on his face went from proud to
shocked as he grabbed the miter gauge and double checked what I showed
him. Unfortunately what makes the Osbourn gauge strong also makes it
weak at certain miter settings. BUT ANYWAY....
Years ago, Incra came out with the Miter Slider line. They only had two
slot adjustments, one at each end, which made them pretty well useless
any time either end was off the table. I did a quick check and found
that the 18" model is still like that. The 25" model has 3. Oh well.
Myself, I'm kind of partial to these:
Shouldn't be that hard to replace the bar on a miter gauge with one of
these. So far I've just used them for jigs like sliding tables so I
Intelligence is an experiment that failed - G. B. Shaw
Approximately measured tests were conducted a little after
the sun awoke.
*The horizontal terminal T on the end of the guide bar is
not adjustable for expansion. It has visible side-to-side and
*The 5 Teflon expansion washers are located on alternate
bar sides with two paired towards the bar front,
two paired near the front of the
of the fence (the forward fence face splits one
of the washers) and one rear of the fence.
*With the fence/protractor off the table, twisting and purely
horizontal play were evident. The weight of the unsupported
components are a prime factor in accentuating the twist.
*The table space in front of the 10" blade cut is about
9.75". The miter assembly gains adequate purchase on
the table to cut a board about 9.5" in width with a 10"
*Pushing a wide board off the table front, stability of
the Incra unit appears best maintained by slightly tilting
the forward bar upward to give the nose T contact
with the miter slot while applying a more noticeable
rightward twist to counter the leftward fence/protractor mass.
As the Incra moves forward to table contact
(even with a forward table bevel), the necessity for the
rightward twist affirms itself to avoid fence collision
with the table.
*With all that weight back of the table and shifted to one
side, I'm honestly unsure whether a longer bar would
The OEM fence guide on the front of the trial table saw would
be an obstruction to contriving any support for the Incra
off the table. Instead of reinventing the wheel, if your
interest persists, the Incra people should have good input
on this and the whole issue.
Also, I tried the OEM miter guage. It suffered from more
horizontal slop off and on the table. Without the big fence,
the twist was less. After I fooled with it to refine function
a long time ago, it cut close enough to dead on that I didn't
need a micrometer in the argument.
The Incra is better, the fence
is super once on the table and I haven't cut at enough fat
boards to give a firm opinion on what can be attained.
That's the qualified skinny.
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