Difficulty
Easy
Steps
3
Time Required
In Progress
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Quiz
0
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The carriage rollers are made from two bearing sleeves and a single R4ZZ bearing. You'll need to install two sleeves on each of the 12 bearings included in the kit.
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Start by laying a sleeve half on the table, face up. Set an R4ZZ bearing into it and firmly press it into place.
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Set another sleeve half on the table and press the R4ZZ bearing and sleeve into the new sleeve half to complete the carriage wheel.
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Note that the sleeves have a sharp edge to them where they were cut free from the bulk stock during manufacture. Take special care not to injure yourself on this edge. It can easily be removed with a razor knife if you so choose.
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Install one #4-40, 3/8" flat head screw into the top of each inner carriage half. Make sure you drive the screw to the depth indicated in the photograph.
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The spring arms consist of an inner and outer halves that retain two of the R4ZZ bearing rollers you assembled in Step #1.
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Set two RZ44 bearings on the inner spring arm as shown in photo #2.
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Press fit the outer spring arm on to the two small posts protruding from the inner spring arm. The fit is very tight, but they will fit!
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In order to fully seat the pins once they're started in the holes, you can tap them in using the back end of your screwdriver as a hammer.
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Assemble three complete sets.
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