distribution. Combination of flat and vee surfaces, i.e. dovetail guideways, are more compact. Cylindrical ways are used for very low loads, due to their low rigidity. Also, they can only be secured at the ends and their wear compensation is quite complicated.
Combination guideways Usually, machine tools use two guideways to pilot the saddle: a vee way and a flat way [Fig. 5.33]. The distance over the guideways (A) ranges from 6 to 20 times t