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Installation & Maintenance Manual
NEMA FRAME COMBINATION AIR ENGAGED FRICTION CLUTCH-
SRRING ENGAGED FRICTION BRAKES
Catalog Products:
X5C2R-14H, X5C2R-14HCA, X5C2R-14HSS
X5C2R-56H, X5C2R-56HCA, X5C2R-56HSS
X7C2R-18H, X7C2R-18HCA, X7C2R-18HSS
X7C2R-21H, X7C2R-21HCA, X7C2R-21HSS
And non-catalog variations of this clutch design.
Mach III Technical Support
Toll Free: 866-291-0849
International: 001-859-291-0849
Email: engineering@machiii.com
www.machiii.com
Detail sheets and 3D models are available on the Mach III website:
http://www.machiii.com/Products/Clutch-Brakes/NEMA-Frame-Clutch-Brakes-C-Face.asp
Please contact Mach III to obtain assembly and parts list drawings.
This product includes rotating equipment and should be guarded according to OSHA
requirements and other Federal, State and local regulations.
It is the responsibility of the user to provide necessary guarding.
© Mach III Clutch, Inc. All Rights Reserved
CLICK on product numbers above
to obtain the product detail sheet
which includes dimensional data
helpful during installation.
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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. Clutch-Brake Installation
A. SHAFT PREPARATION
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 brake onto the
shaft. Hammering on the 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.
B. MOUNTING
The clutch-brake mounts between a motor and gear reducer. These units may be suitable for
belt drive (pulley output) applications. Consult factory for options.
C. 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 an air line to the fitting. Air supply
should be both filtered and regulated. Contamination in the air supply may damage the clutch.
D. FINAL INSPECTION & TESTING
Cycle the clutch with the machine off to check for air leaks and to ensure proper engagement and
release. After a short run, check mounting screws.
III. Clutch-Brake Operation
The maximum operating pressure should not exceed 80 PSI. Operation at pressures
greater than that required for proper function will decrease the life of the bearings.
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, clutch or brake 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 and O-rings.
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CAP SCREWS
CAP SCREW
O-RING
FRICTION DISC
DRIVE DISC
FLAT HEAD SCREW
SPRING
CAP SCREW
SET SCREW
ACCESS
SET SCREW
SPACER
PISTON ASSEMBLY
PIN
V. Parts diagram
Repair Kit:
Part number = Clutch-Brake Product Number + “-RPRK” (e.g. X5C2R-56HRPRK, X5C2R-56HCA-RPRK, Etc.).
Additional
Parts:
Contact Mach III to obtain a complete listing of additional parts kits available for
your specific clutch. Please reference product number when calling or e-mailing.
Repair
services:
Factory repair is available. A return materials authorization (RMA) number must
be obtained prior to sending any unit in for repair.
Tools Required
Hex Wrench Set
Compounds Required
Grease
O-ring Lubricant
Anti-Seize Lubricant (for re-installation)
VI. Repair Kit Installation Procedure
A. CLUTCH & BRAKE FRICTION DISC, O-RING & SPRING REPLACEMENT
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(1) Remove clutch-brake from shaft and place in vertical position with output shaft facing
up.
(2) Remove cap screws from case.
(3) Remove top half of assembly and place on bench with output shaft facing down.
(4) Remove cap screws from drive disc in a uniform manner. The drive disc is under
pressure from the springs.
(5) Remove the drive disc and set aside.
(6) Remove flat head screws from friction discs and remove.
(7) Remove cap screws from spacer in a uniform manner. The spacer is under pressure
from the springs.
(8) Remove springs and piston assembly consisting of piston, bearing, and cone.
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CLUTCH & BRAKE FRICTION DISC, O-RING & SPRING REPLACEMENT CONTINUED:
(9) Remove O-rings.
(10) Replace O-rings that have been lubricated with an O-ring lubricant such as Dow
Corning® #4 Compound or equivalent.
(11) Inspect cylinder walls and lubricate with O-ring lubricant.
(12) Replace piston assembly being sure the pins are located into the holes in the cylinder.
(13) Replace springs, spacer and cap screws.
(14) Replace friction discs and flat head screws.
(15) The drive disc should be clean, dry and free of burrs or nicks.
(16) Assure that drive disc moves freely on the drive hub and replace cap screws.
(17) Replace top half of assembly with output shaft facing up and replace cap screws.
(18) See “CLUTCH INSTALLATION” portion of these instructions for the proper procedure
for reinstalling the clutch-brake.
Technical assistance is available by contacting Mach III Clutch, Inc.
Mach III Product Warranty
http://www.machiii.com/Resources/Warranty-Info.asp
Mach III Clutch, Inc.
101 Cummings Drive ● Walton, KY 41094
Toll free 866.291.0849 ● International 859.291.0849 ● Fax 859.655.8362
info@machiii.com ● engineering@machiii.com ● www.machiii.com
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