Tools
Parts
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You need to use a soldering iron to carefully sink the brass inserts into the printed Y carriage. Sink the inserts in 2/3 of the way, then press the carriage against a flat metal surface to get them flush.
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After placing each insert you may need to clear the channel by running a tap or bolt down through the insert and into the plastic. (Be very careful not to cross thread your inserts!)
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Here's a good article about setting the brass heat set inserts: click here.
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The Y carriage gets (17) 3mm brass inserts, as in the picture. (Note: there are also two on the back side, and one on the top. Not all RailCore kits include the optional one on the top, requiring only 17 inserts)
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