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Default Runners for Cross Cut Sled - Hardwood or Aluminum?

On 2/2/15 2:38 PM, DerbyDad03 wrote:
As far as I can tell, the standard material for Cross Cut Sled
runners is hardwood and typically 2 are used. However, I saw a couple
of plans that use aluminum as the runners and even one that suggests
a single miter gauge bar as the only runner.

http://www.finewoodworking.com/item/...-crosscut-sled

I think I see advantages and disadvantages of all options, but I'd
like to hear your opinions.

"2 hardwood runners is the way that it's always been done" will not
automatically be considered an "advantage". ;-)


I've used hardwood and the aftermarket adjustable aluminum runners
available from different tool suppliers. If you're using two runners
then a perfect fit in the slot isn't that necessary because as long as
each runner is pushing against its slot opposite of the other, the sled
runs true and stable. In other words, if they are both pushing inward
or both pushing outward against the slots, you're good.

When only one runner is used, it has to fit the slot very well and being
adjustable might be preferred, so an aluminum pre-made runner might work
better.


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