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If you really want to place your mind at ease and want to save a few bucks over all-SiC guides, you could opt for a "mixed" set of guides. You could go with Hardaloy on the lower guides, and with SiC on the 2-3 nearest the tip and on the tip-top, as these bear the brunt of the friction when the rod is under a load. The price difference between Hardaloy and SiC is less in the smaller guide sizes than in, say the 20-30 mm size.
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Threaded Mode