![]() I'd imagine these rails lasting for some time - long enough to iron out all the kinks and design your second machine (which you know is inevitable). hardened 12mm rail at the same length pre drilled and tapped costs in the region of £150 (£50 a meter).įor someone building thier first machine i'd say this would be ideal.for a hobby machine being used on week-ends. but how long would it take?Ģ0mm dia delrin rod goes for around £10 a 3 meter length(drilling and tapping for support is a matter of minutes). and was thinking along the lines of delrin against itself. ![]() I -think- you also have more chance of binding with like against like but that's kind of a WAG on my part.i agree with that statement. If you have Delrin against itself, both parts will wear, and in a linear bearing, you will get more wear at the center than at the ends, or at one end than at the other, etc. Delrin riding on aluminum is a good example. A good rule of thumb is to have a softer material riding on a harder material and make the softer contact parts adjustable to take any play out. ![]()
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