Were does this come from...I always thought "NiChrome" was more accurate? (And yes, I did try to Google it!) Thanks
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13 years ago
Question About "Cal Rod" Origin
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13 years ago
CALorie, meaning heat?
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13 years ago
Inside a Calrod tube are ni-chrome wires surrounded by a filler material. . Calrod is a trademark for a type of heating element made by General Electric. My guess is the name comes from the function. Calorie = heat measure Rod = tubular form, thus Calrod = commercially made tubular heating element. They are far more rugged than stretching a ni-chrome wire in the oven.
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13 years ago
So, my guess would be: a ni-chrome wire, surrounded by ceramic (of some sort), surrounded by a steel tube. So Calrod is like "Scotch Tape" or "Frigidaire" (if you're old enough).
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13 years ago
Google tells me "Magnesium Oxide" is the insulation inside the tube.
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13 years ago
"Asperin", "Xerox",... Yes.
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13 years ago
Cal rods are indeed VERY durable. I fix machines that use them heated to 300 degrees every day for 20 years and up. The american made ones never fail, chinese??? well not so great.
The only reason I replace them is customers breaking or more notably cutting:( the wires off the end...
CAL RODS are basic life of product devices.