Resistance Heater for Al Brazing | ||||||||||||||||||||||||||||||||
Resistance Wire:
14AWG Chromel-C (AWS 675) |
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Transformer winding Version 1: 6T #4AWG |
Version 2: 2x20T 0.01x0.8 copper with 1kW dimmer. |
Stainless steel tube bending jig. |
Ring sizing and cutoff template. |
Wire and sleeving pulled through SS tube. |
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Heater feed through base plate (5/16" id SS). |
Wires ready to be terminated. |
Aluminum ring to be brazed on heater. Heater tube flatness adjusted with screws. |
Center bar is welded to the base plate, terminals are insulated with 10mil Kapton sheet. |
800W operation, 20VAC at 40A. The heater levels out at 525C (977F) in 3 minutes. |
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Ready to braze: When the aluminum gets to about 250C (482F), hit it with the MAPP torch. |
Brazing stand plan. |
Brazing Test 2. (Movie) |
Any questions or comments?
This page last updated on
March 30, 2010