Hi,

I have been helping a friend with cleaning and readjusting his SP20. Now that we’re almost done the moveable end of the roller rack seems to be sticking a bit too far up. The press hasn’t been used for probably something like 20 years… So hard to tell why that is. Anyway, the spring probably has to be shortened or replaced. Can anybody tell me what the perfect angle is for this? How much does it need to stick up?

Thank you very much. Best wishes from Switzerland.

Dafi

 

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10 thoughts on “SP20, Roller Rack”

  1. Thank You, Paul!
    Is it possible to get a picture of the Roller Rack Spring? Is it a conical spring?
    Rodolfo

  2. Rodolfo: The starting tooth with its pointed teeth helps the spinning form roller gear transition onto the form roller rack. When the form roller gear meshes with the teeth on the roller rack the rubber roller will roll and not slide over the printing form.

  3. Rodolfo Sanchez

    Hi,
    I’m starting to use a recently restored SP 25 in Guadalajara, Mexico. The roller rack of my press has no spring. Please, could you explain me how does the roller rack work? What’s its function?
    Thanks.

  4. The starting tooth(BS-429) is in stock as well as the spring (BRS-1). Eric is correct about how the starting tooth works, and I can also furnish the pin if needed.

  5. If I remember correctly, the starting tooth there pivots on a pin, and on the end opposite the teeth, there is a spur or leg that holds it at the proper rest position against spring pressure. If the spur breaks, then the spring will push the starting tooth higher. Time to replace the starting tooth. I’ve gotten this from NA in the past, hope they are in stock now.

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