8
For Greater Accuracy of General Machinery
When bolting the first rail on the machine
base, align it straight using a straightedge
and a dial indicator.
Bolt on the rail at the both ends lightly, and
position a straightedge beside it. Set the
straightedge parallel to the rail measuring
distance A1 and A2 by a vernier calipers or
some other accurate measuring tool.
Move the dial indicator along the straightedge, and take readings at every bolt hole along the
rail. Make fine adjustment of the rail to the straightedge until the desired reading is made,
and tighten the bolt to the specified torque.
When all of the bolts have been tightened, slide the dial indicator from one end of the rail to
the other to ensure that the desired straightness has been achieved.
During installation, it is recommended that accuracy is checked to ensure smooth operation.
Position the dial indicator on two ball slides
on the reference rail as shown in the diagram.
Tighten bolts of the adjusting side rail
sequentially from the one end while noting
the reading of the dial indicator.
Straightness of NSK linear guides is controlled
so that it can be easily adjusted manually for
easy installation.
