Challenge M Series Worm Gear Fabrication

Challenge-M-oscillator-1 Challenge-M-oscillator-2

I am having a new worm gear and crescent fabricated for a Challenge M series press.* I intend to have a couple of extra sets made. The cost per set will be $1,150 with free shipping within the US and Canada. This is less than having a one-off made.

The Challenge census lists forty-one 15MA/MP and four 21MP. The gear diameter is the same for both sizes only the shaft length differs.

My watchword regarding presses is “anticipate failure.” You will be glad to have a spare worm gear and crescent at some point down the road. The price will certainly be higher in the future. Please contact me as soon a possible. I require a 50% deposit with the balance due before shipping.


*Similar to the Asbern A series a crescent is set into a collar that is attached to the end of the tube with set screws. Unlike the Asbern, (or Vandercook) the worm gear is cut into the shaft. This Challenge 21MP is locking up at one end of the worm gear. There are chips in the gear points and the crescent is also worn.

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