Mach III Clutch 118PI & 118PI-ULOW - Manual (Page 3)

7/10/2013 CLUTCH_SENSIFLEX_PI_MANUAL Page 3 of 5
B. AIR LINE CONNECTION
Air supply should be both filtered and regulated. Contamination in the air supply will
cause damage to the clutch, particularly to the diaphragm actuator. Connect a flexible
airline to the air inlet using a thread sealing compound. Do not use rigid piping.
C. ANTI-ROTATION (REACTION) ARM CONNECTION
Install a reaction arm (bolt, rod, or other device) into hole provided. This is necessary
to prevent rotation of the air cylinder (due to the drag in the bearings) and to keep
pressure off of the air inlet. This arm should not be held rigidly.
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:
http://www.machiii.com/pdf/ReactionArmInstallation.pdf or by
calling Mach III to have a copy sent by email or fax.
D. FINAL INSPECTION & TESTING
Check alignment of the sprocket or pulley. Cycle the clutch 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.
II. Operation:
Torque is proportional to air pressure. SensiFlex® clutches are designed for use in slip
applications, typically to maintain tension on a web during rewinding or a similar tension control
application. Mach III Clutch, Inc. should always be consulted to assist with selection of a
SensiFlex® Clutch to assure that required tension can be maintained while dissipating the heat
caused by constant slip.
III. Routine Maintenance:
Friction discs are a “wear” item and in a constant slip application, periodic replacement of the
friction disc will be necessary. The frequency of disc replacement varies with each application.
Screws are used to mount the friction disc on the drive disc. Wear of the friction disc should be
monitored so that it can be replaced prior to the point at which the heads of the mounting
screws would make contact with the input sleeve. See chart below for replacement point
recommendations.
Friction Disc Replacement Recommendations
Product Original Thickness
of Friction Disc
Replace When Worn To A
Thickness Of:
38PI/38PI-ULOW
3/16 Inch 9/64 Inch
58PI/58PI-ULOW 1/4 Inch 1/8 Inch
78PI/78PI-ULOW 5/16 Inch 3/16 Inch
98PI/98PI-ULOW 7/16 Inch 5/16 Inch
118PI/118PI-ULOW 7/16 Inch 5/16 Inch