In article . com,
wrote:

You can certainly pre-heat with propane, a regular back yard gas grille
makes an excellent pre heat oven for small parts and in some cases can
be used as a heated welding table. You might need to add fire brick,
depends on what you want/need to do and how. I've used mine for
heating up parts to expand them and get them apart, aluminum cases with
steel bearings in, etc.

CAUTION: THREAD DRIFT ALERT!

AAAAARRRRRGH! Steel anything in aluminum! AAAAAAAARRRRRRGH!

Blasted Quickie wheelchairs, curse them!

Some of the best wheelchairs in the world, except it can be damn near
impossible to work on one. Why? Because they habitually use hardened,
black oxided, fine thread, steel Hex Head Cap Screws in aluminum
assemblies! Dat's Why!

Let those parts go for a couple of years and the aluminum and steel both
corrode and bond to each other stronger than a weld. It has too often
become necessary to drill out the steel screw and replace it with a
through bolt--Or just replace the entire assembly--If it can be taken
off at all-- dying--alone--in the rain. (Oops. Disregard that last:
Hemmingway Syndrome. Sorry.)

Can't heat them because they're usually in places on the wheelchair
where doing so would ruin some other vital subassembly.

And they've never heard of Never-Seize, either!

I tend to think of Mobility Device Engineer as an oxymoron much like
Automotive Engineer.

If there is _any_ way to overcomplicate an assembly or subassembly,
Quickie will find it, use it, and perpetuate it.

Damn shame their equipment is otherwise so excellent.

Oh, yeah, On-Topic: Damn good idea about the gas grill! How many minutes
per side, any marinade?