nuckolls.bob(at)cox.net
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 Posted: Sat Jul 26, 2008 8:04 am Post subject: DIY large radius layout compass |
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A few years ago when the digital calipers became really
inexpensive at H.F., I converted a pair to a very accurate
tram-point compass and layout tool. A few days ago I
needed to cut out a nice circle from a chunk of laminated
flooring and my little 6" calipers cum compass were too
small for the task.
While visiting H.F. for some sanding disks yesterday, I
spotted a 24" aluminum caliper for $10 that solved my problem.
With a couple of small drills, some JB Weld and few minutes
of time, I converted the HF 96509 calipers to a handy large
radius compass:
http://aeroelectric.com/Pictures/Tools/Layout_and_Measurement/Large_Radius_Layout_Compass.jpg
The stationary leg of these calipers is held onto
the rule with set screws. After the JB Weld is set,
you can re-calibrate the point-to-point distance
by repositioning the stationary leg.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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