roller guide replacement part

A quick learner from Tampa Fl says:
The photo shows Disco - 1189
Thumbnail of the uploaded file named Disco 1189.jpg
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Tom from SWISCO responded:

I think we can supply this roller, but I need more information first. To start, can you show me a picture of the back end of the roller? Can you also tell me the width and height of the housing?

A handy person from Tampa Fl says:
The height of the housing is 1 & 9/16"
Depth is 3/4"
The mounting bolt is 1/4-20 but what length please

Thank You
Rick
Thumbnail of the uploaded file named Roller Depth.JPG
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Tom from SWISCO responded:

Perfect, Rick, thank you so much. That's just what we needed. Based on that data, my recommendation would be the 81-245. This matches your dimensions precisely and the style looks very close, too. Let me know if you had any questions.

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