There are several types of screws used in the equipment. Hex head cap screws are “Grade
5” and are general purpose screws used for most assemblies. Shoulder screws are “Grade
8” and have a hardened and ground shoulder portion. The size of a shoulder screw is
determined by the diameter of the shoulder. These are high strength screws generally
used as linkage pivots.
Socket head cap screws have a recessed hex in a round head (similar to shoulder bolts)
and are “Grade 8”. These are high strength screws used in critical load bearing
applications such as retaining cams and belts.
All high strength bolts should be torqued to the tabulated values to obtain maximum
strength. Screws used for clamps must be tightened gradually so both sides pull in evenly.
The cap of the clamp must stay parallel to the mating half so the screw heads bear evenly
on the cap. Only once the cap has been securely snugged down should the bolts be
torqued.
Note: When screws are installed using a thread locking compound (such as “Loctite”)
torque to the lower value of the range listed.
When replacing screws use an equal or higher grade. Socket head cap screws must be
non-plated to achieve maximum strength.
BEARINGS
The 1/2", 5/8", and 1" flange bearings must be lubricated every 3 months. Using SAE 30
wt. motor oil, put one drop on the exposed portion of each bearing. Move the machine
through its range to work the oil in, then wipe the area around it free of exposed oil.
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