Mach III Clutch W6A2G-STH User Manual
Page 2
7/9/2013
CLUTCHBR_PILOT_BALLBRG_MANUAL
Page 2 of 5
I.
New Clutch-Brake Torque
New clutch or brake torque is approximately 40% less than rated design torque until the
friction and drive discs are worn in (lapped, burnished). The length of time for wear-in to
occur depends upon the application.
II.
Installing a Sprocket or Pulley
Mach III units are typically shipped from the factory with the required sprocket or pulley
preinstalled. This section pertains only to those who need to install or replace a pulley or
sprocket in the field. Please use the links on page one of this document to obtain the
detail sheet for your unit. This sheet will include the pilot diameter and other dimensions
needed to machine the sprocket or pulley.
Bore the sprocket or pulley for clearance (slide fit) over pilot and drill standard clearance
holes for the number and type of screws on corresponding bolt circle. The cap screws
used to attach the sprocket or pulley should not be longer than the sum of the depth of
the threaded hole plus the thickness of the sprocket or pulley. Otherwise, the cap screws
may bottom out. Tighten all screws to uniform torque based on screw size and use
proper Loctite
®
(or equivalent) compound to assure a permanent mount.
III.
Clutch-Brake 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. Make certain that the shaft is free of burrs or nicks. It may be
necessary to file or sand the shaft to assure a slide fit. Never hammer the clutch-brake onto
the shaft. Hammering on the clutch-brake 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 clutch-brake over key on the shaft, align the sprocket or pulley.
(4)
Tighten set screws to secure the clutch to the shaft.
B. AIR LINE CONNECTION
Refer to the dimensional spec sheet for NPT size to obtain correct fitting. Install fitting using a
thread sealing compound to prevent air leakage. Connect a flexible air line to the fitting. Do not
use rigid piping. Air supply should be both filtered and regulated. Contamination in the air
supply may damage the clutch-brake.
C. ANTI-ROTATION (REACTION) ARM CONNECTION
The air cylinder portion of a Mach III through shaft style clutch is designed to remain stationary.
Due to friction in the bearing housed in the air cylinder, this member will rotate unless an anti-
rotation arm (a.k.a. reaction arm) is installed. A threaded hole is provided in the cylinder for the
installation of this arm. Please refer to Mach III
’s Anti-Rotation (Reaction) Arm Installation
Instructions document for illustrations of proper mounting. This document is available from the
Mach III website:
or by calling Mach III to
have a copy sent by email or fax.
Note that in all cases, the machine frame or bracket should not be tight against the
housing of the clutch as contact may impede piston movement and will shorten bearing
life.
D. FINAL INSPECTION & TESTING
Check alignment of the sprocket or pulley. Cycle the clutch-brake with the machine off to check
for air leaks and to ensure proper engagement and release. After a short run, check set screws
and alignment.