MPTA C3c – Balancing Informational Bulletin – (MPTA-C3c-2019)
Many users of elastomeric couplings are being presented with the need for increased balancing. This subject is mentioned in trade articles, trade shows, seminars, by consultants and engineering schools. The reason often given for increased coupling balance is noise, shaft and bearing wear, and vibration. Many of the proponents of tighter balancing speak of values of balance which can significantly increase the product cost and may produce no observable benefit to the application. All manufactured couplings have balance to some value or class. The amount of balance required varies from application to application. This is a result of the fact that every coupling is but one component of a rotating system of many components manufactured by several manufactures. It is often the characteristics of these other components which determine the amount of required coupling balance. Very often, the user of couplings specifies a value of balance based upon a source which has no knowledge of their unique system. The risk is that the value of balance specified may be beyond the user‘s application needs. Because the responsibility for the selection of proper coupling balance lies primarily with the purchaser of the coupling, this “informational bulletin” was written to aid that user in determining the value or class of balance needed in their own unique application.
MPTA C4-2014 R2021 – Elastomeric Coupling Informational Bulletin – (MPTA-C4-2014 R2021)
MPTA C7c – Common Causes of Tire Coupling Failures (MPTA C7c-2010)
This publication is intended to provide users with a general overview of the most common causes of failure with elastomeric Tire couplings and their causes.
MPTA C8c – Sleeved Element Failure Analysis (MPTA C8c-2011)
This Informational Bulletin is intended to provide users with a general overview of the most common failures of elastomeric shear donut style couplings and their causes.
IP-3-16: ATmosphere EXplosible (ATEX) An Overview
RMA IP-3-16 | Technical Bulletin
The European Union’s Atmosphere Explosibles (ATEX) Directives became law September 1, 2003. More commonly referred to as ATEX, there are two complimentary directives, intended to reduce the hazards created by potentially explosive atmospheres, primarily in the petrochemical, refining, and mining industries. Both are intended to facilitate free movement of products and equipment within the European Community. One directive applies to equipment, and the other applies to worker protection.
IP-3-17: Power Transmission Belts – Standard Symbols
RMA IP-3-17 | Technical Bulletin
The following symbols have been established for use in power transmission belt standards, technical bulletins, and Technical Committee documents. The symbols reflect domestic practice in existing standards or standards under development for V-belts, V-ribbed, and synchronous belts. In the case of synchronous belts, the symbols also reflect ISO wherever possible (reference ISO 5296).