114
TRAK Machine Tools
Southwestern Industries, Inc.
ProtoTRAK SMX, K2, K3 & K4 & Retrofit Safety, Installation, Maintenance, Service and Parts List Manual
Figure 50
Ball Screw/Yoke Assembly
9.
In the ballnut flange there are two tapped 10-32 holes. One for the provided elbow oil fitting, and one for a
10-32 setscrew. For the X ball screw put the elbow oil fitting in the hole on the radius of the flange, and the
setscrew in the hole on the flat. The function of the setscrew is only to prevent oil from flowing out of the
ballnut. Screw it as far as possible being careful not to contact and deform the nylon wiper.
10.
Attach the provided plastic oil line to the elbow oil fitting.
11.
Slide the ball screw into the yoke with the flange of the ballnut to the left. Do not install the 5/16-18 x 1
3/4” screw yet.
12.
Secure the yoke to the saddle with the 4 screws, make it snug but not tight. You will need to move the
yoke a little to align the ball screw.
13.
Secure the ballnut to the yoke with 5/16-18 x 1 3/4” screws.
14.
(Optional) If the yoke was pinned previously, replace the pins and then tighten the yoke to the saddle.
15.
If the yoke was not pinned, it will be necessary to align the ball screw:
