I purchased two lengths of 1515 and a pair of slide from the 8020 ebay store. My thought was to bolt the 1515 onto a more substantial underlayment and then use it and the slides as a poor man's (that term defines me) linear bearing.
Well, it's sitting here on my living room floor. Let's see... The slides fit snugly-you do have to push a bit to get them to move. You would not be looking at anything that would coast, for sure. Keep in mind these are new-I don't know how they might break in. And what about lubing the rail? Hmmm.
Also, there is a bit of play, desite the snugness, that would allow for a small amount of torsion-induced error. Sorry, I have no way to give you "numbers". Perhaps two slides per rail separated by a distance and bolted rigidly together would help.
Finally, I don't think binding would be an issue. It appears that you might torque a bit of error into an axis, but I believe it would continue to move.
Don't know if this helps. |