TKH rails: Using 1 bearing block per rail? - CNCzone.com-The Largest Machinist Community on the net!

LinearMotionFan · #1 12-14-2008, 08:04 PM

Hi guys,

If we use THK/NSK/ect. style rail for the x-axis on a light etching machine, can we use just 1 bearing block per X-rail to support the gantry or is there too much play, so that we'd need 2 bearing separated apart a few inches to keep the gantry vertical? There will be very negligible contact force, just the weight (50 lb. max) of the gantry.

Thanks!

rowbare · #2 12-14-2008, 09:53 PM

You will have a severe racking problem if you only have one bearing per side. The cutting forces will make whichever side of the gantry you are cutting lag the other side.

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