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projects:guard [2014/03/24 01:36] (current)
rbean created
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 +======Table Saw Guard======
 +
 +By Ron Bean, Spring 2014
 +
 +This started out as an experiment, but it's working well enough that I
 +might as well call it permanent.
 +
 +{{:​projects:​guard:​guard04.jpg|}}
 +
 +Our table saw came with a blade guard that was attached to a splitter,
 +and every time someone moved the guard, they'd bend the splitter out of
 +position, so it didn't line up with the blade. Instead of bending it
 +back, people would just remove the guard and put it in some random place
 +where we couldn'​t find it, so a lot of the time we were using the saw
 +without a guard.
 +
 +Over-arm type guards are available, but some people have built their
 +own, so I decided to give it a try. The Lexan sides and the spacers
 +between them were cut out on the CNC router (see DXF files below).
 +Everything else was sized to fit the saw. (It's made for a 10" blade,
 +but for some reason we have an 8" blade on the saw right now.)
 +
 +The spacers add up to 1.5", which seems to be wide enough. The guard can
 +be moved slightly side to side, but not enough to contact the blade. I
 +wanted it to be as narrow as possible, because I often make cuts as
 +narrow as 3/4". A giant washer acts as a counterweight (it weighs about
 +a pound). I used vibration-proof nuts on the bolts holding the guard
 +itself together, and double nuts tightened against each other on the
 +pivots. I also put acorn nuts on the ends of the pivots to make them a
 +little safer.
 +
 +{{:​projects:​guard:​guard02.jpg|}}
 +
 +This picture shows the first experiment, with clamps holding everything
 +together. That worked well enough, but didn't allow wide sheet goods to
 +be cut (hence the sign telling people they can remove it if necessary,
 +although we encourage people to cut large sheet goods on the panel saw).
 +
 +I thought we'd have to fabricate a cantilevered arm from welded steel,
 +or maybe some of the carbon fiber tubing that's laying around. But first
 +I built a prototype out of 2x4s, and it worked well enough that I
 +decided to leave it that way (I replaced the last two clamps with nuts
 +and bolts after the picture at the top of the page was taken.) ​
 +The upright has a "​foot"​ at the bottom that keeps it from pivoting around ​
 +the bolt that holds it to the saw.
 +
 +{{:​projects:​guard:​splitter02.jpg|}}
 +
 +The new splitter was cut from 16 gauge sheet steel on the vertical
 +bandsaw in the metal shop, then filed to fit, and bent with a pair of
 +pliers to line up with the blade. It has slots in the bottom, so it can
 +be removed by loosening the bolts with a 10mm wrench (for certain kinds
 +of cuts that it would interfere with, such as dados). Since it's not
 +attached to the guard, it doesn'​t get bent as easily as the original
 +one.
 +
 +{{:​projects:​guard:​guard-04a.dxf|}}
 +
 +{{:​projects:​guard:​guard-05a.dxf|}}
 +
 +{{:​projects:​guard:​guard-06a.dxf|}}
 +
  
projects/guard.txt · Last modified: 2014/03/24 01:36 by rbean