Mach III Clutch MBG2K-STH User Manual

CLICK on product numbers above

to obtain the product detail sheet

which includes dimensional data

helpful during installation.

Installation & Maintenance Manual

HEAVY DUTY AIR ENGAGED FRICTION CLUTCH MECHANISMS

WITH COUPLINGS

Catalog Products:

M5G2K-STH & M5G2K-STL
M6G2K-STH & M6G2K-STL
M8G2K-STH & M8G2K-STL

MAG2K-STH & MAG2K-STL

MBG2K-STH

And non-catalog variations

of this clutch design.

Mach III Technical Support

Toll Free: 866-291-0849

International: 001-859-291-0849

Email: [e-mail]

www.machiii.com

Detail sheets and 3D models are available on the Mach III website:

http://www.machiii.com/Products/Clutches/Heavy-Duty-Clutch/Clutch-Mechanisms-

Couplings-Heavy-Duty.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.

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© Mach III Clutch, Inc. All Rights Reserved

I. New Clutch Torque

New clutch 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 Installation

Great care must be exercised to assure proper offset & angular alignment between shafts

to prevent premature clutch failure.

Dimensional diagrams can be obtained by using links on page one of this manual.

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 onto the
shaft. Hammering on the clutch 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) Position clutch mechanism and coupling hub on shafts.
(4) Tighten set screws to secure the clutch and coupling to the shafts.

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.

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 anti­rotation 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: http://www.machiii.com/pdf/ReactionArmInstallation.pdf 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 coupling. 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.

III. Clutch 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 may either seize up
entirely or lose torque capacity. If friction discs become contaminated, they should be
replaced. See repair kit ordering information below.

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