Hey folks. My name is Anthony Park. I'm a swordsmith and I'm looking to build what i hope to be a very simple oven.

It just has to be long enough to temper a sword, not heat treat it.

So basically I have to bake a 4 foot long by up to 6 inches wide(in case a wide sword curves) piece of metal. Up to 600 degrees.

I would like this to be inexpensive. it's basically a 5 or 6-foot tube as i envision it. A large tube with insulation and some kanthal wire.

I figure kanthal because it seems difficult to find inexpensive heating elements of 4-foot length.

It's an 9 inch duct tube with 2 inches of insulation and kanthal heating elements.

it stands vertically so the springs hang.

Questions: So if the inside dimension of a tube is about 6 inches wide by 4 ft long. How many kanthal springs will I need?

How do they hook up to the PID

How do I know which PID to buy? I don't know how many watts or amps or any of that stuff. I'm sure there is a formula for that but I don't have any of the variables..

I hope you can lead me by the nose a bit to a successful oven build with inexpensive parts.

Thanks in advance!!!

Anthony Park

It just has to be long enough to temper a sword, not heat treat it.

So basically I have to bake a 4 foot long by up to 6 inches wide(in case a wide sword curves) piece of metal. Up to 600 degrees.

I would like this to be inexpensive. it's basically a 5 or 6-foot tube as i envision it. A large tube with insulation and some kanthal wire.

I figure kanthal because it seems difficult to find inexpensive heating elements of 4-foot length.

It's an 9 inch duct tube with 2 inches of insulation and kanthal heating elements.

it stands vertically so the springs hang.

Questions: So if the inside dimension of a tube is about 6 inches wide by 4 ft long. How many kanthal springs will I need?

How do they hook up to the PID

How do I know which PID to buy? I don't know how many watts or amps or any of that stuff. I'm sure there is a formula for that but I don't have any of the variables..

I hope you can lead me by the nose a bit to a successful oven build with inexpensive parts.

Thanks in advance!!!

Anthony Park

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