When scratch building what is the best way to cut out the doors and
windows? I always seem to have trouble in doing it right. thanks for any
info. Paul McCann
God bless you and have a good day with Him at your side.
Take a pin vice and drill a small hole right at each corner of your
marked out doors or windows. Then just use your straight edge and knife to
make the cut outs. This way you won't over run your cuts and its also very
easy to nicely square off the corners if needed to fit your frames or
castings. If you are using castings be sure to measure the back side of the
casting that fits into the opening and use those dimensions to size your
openings rather than those that may be on a plan or drawing. Bruce
items 81652 or
82394. Gives a precise, neat corner with much less effort than drilling and
filing out or cutting to drawn lines. Limitations are that the material
can't be too thick or so soft that it compresses as it is cut, and that the
window or door opening must be no smaller than the cutter side dimension.
An advantage is that a straight-edge can be taped or clamped to the material
at the top and bottom of a row of windows to align the horizontal edge of
the cutter, assuring a nice straight row. Gary Q
My problem is cutting some styrene windows with rounded corners as on a
passenger car. I've tried to drill holes where the corners will be,
but accurately locating these holes is the problem. Even by being off
by the tinyest amount throws the geometry of the winder cutout off.
Trying to file things straight just makes things worse!
Using a corner chisel, as suggested, would still work if you first
ground a suitable radius on the outer corner. Tho complete the job would
also entail regrinding the inner beveled edges so a radius appeared
there as well ... otherwise you'd just get two flat chisels at right
angles, with a small gap in the corner between them.
A bench grinder would be the best tool for this modification, but you
could do it with a motor tool (Dremel)or such. With more effort, you
could do the whole thing with hand stones. In either case, you'll likely
need to touch up the inner surfaces of the bevel with a fine stone or
diamond hone. All this is a little tedious, but fairly cheap, and should
make an effective tool. It would be a good investment if you need to
male a bunch of the round corner windows, as for a passenger car.