Mach III Clutch T4C2H-21L, T4C2H-21LCA, T4C2H-21LSS - Manual (Page 2)

7/9/2013 TORQLIM_NEMA_MANUAL Page 2 of 5
I. Torque Setting
Mach III torque limiters are typically shipped to the customer with the torque value they have
specified. (Note: All torque settings are +/- 10%.) If a torque limiter requires setting or re-
setting in the field, please refer to section VII of this document.
II. Torque Limiter Installation
A. SHAFT PREPARATION & MOUNTING
Mach III Clutch products are bored to fit a precision plug gauge for the specified bore size and
should slide fit the mating shaft and key. Make certain that the shaft is free of burrs or nicks. It
may be necessary to file or sand the shaft or key to assure a slide fit.
Never hammer the torque limiter onto the shaft. Hammering on the torque limiter may cause
evident damage or subtle injury that will shorten the wear life of the unit, and will void the
warranty.
(1) Apply the anti-seize (E-Z Break
®
) lubricant from the packet provided, or equivalent, to
the shaft.
(2) Insert key (customer supplied) onto the shaft.
(3) Slide torque limiter over key on the shaft.
(4) Tighten flange with cap screws (customer supplied) to motor frame.
(5) Tighten set screw via set screw access hole to secure the key on the shaft.
(6) The torque limiter mounts between a motor and gear reducer. These units are not
suitable for belt drive (pulley output) applications. Consult factory for options.
B. FINAL INSPECTION & TESTING
After a short run, check set screws and alignment.
III. Torque Limiter Operation
This is a manually adjusted torque limiter. Torque is proportional to the amount of spring
compression. This is a friction device and should be monitored for slip. The torque
limiter will burn up if allowed to slip for an extended period of time.
Special Note Regarding Friction Disc Contamination:
The friction material used in this product will absorb oil, water, chemicals and other
contaminants. Depending on the type of contamination, torque limiter may either seize
up entirely or lose torque capacity. If friction discs become contaminated, they should be
replaced. See repair kit ordering information below.
IV. Routine Maintenance
When installed and operated according to the preceding guidelines, Mach III Clutch
products should require little or no routine maintenance. A repair kit is available which
contains all parts subject to typical wear: friction discs, springs.