The air required to engage (in air engaged/spring released units) or disengage (in spring engaged/air released units) a clutch, brake, combination clutch-brake is the volume to fill the area between the cylinder and piston. Air is not consumed until it is exhausted from the unit. Air volumes are listed on the downloadable PDF detail sheets available for each catalog product on this website (click here for example). Air volumes of non-catalog products can be obtained by contacting engineering.
The most important thing know is that you do not have to do this yourself. Mach III will ship the sprocket or pulley you require pre-mounted on the pilot of the clutch, clutch-brake or torque limiter you’ve ordered. If this is a replacement or new addition to an Mach III unit you already have, we can supply the sprocket or pulley pre-bored and tapped to fit the pilot. Contact customer service for pricing and information.
For those who prefer to machine their own sprockets and pulleys:
Use the following formula to determine the torque rating at an alternate psi value:
Torque = (Design Torque x 25 psi) / 80 psi
Every catalog product ordered is manufactured with the bore size specified by our customer. The bore sizes shown for Mach III catalog products are MAXIMUM bores size available for that product with a standard keyway. Mach III also supplies METRIC bores and keyways and can supply non-standard keyways.
If you have a non-catalog unit, the bore and keyway sizes are typically specific sizes associated with the special part number assigned to that product. Contact engineering if you need to order a non-catalog product with a different bore or keyway size than you have currently.
Wear in is a function of speed, load and cycles. In most cases a few dozen cycles will achieve the desired burnishing.
Mach III thru shaft clutches and all combination clutch/brakes require installation of an anti-rotation arm to prevent rotation of the cylinder. The attached file contains installation recommendations.
Anti-Rotation Arm Mounting Instructions.pdf (99.79 kb)
Contact customer service with the product number of the unit. They can supply parts lists, installation and maintenance documents, parts and kit numbers and pricing. For a guide to locating the Mach III product number see the Identifying a Product page under the RESOURCES menu.
The part number or the existing unit is a good place to start, but it is important that we have a complete understanding of how the unit is used before we can recommend or design a replacement. Please contact the Mach III engineering department with a description of the existing unit and its function as well as any problems that need to be addressed. Digital photographs of the existing drive are helpful.
A product number and manufacture date is stamped into the housing of every Mach III product prior to shipment from our factory. For more informaton on locating this information, see the the Identifying a Product page under the RESOURCES menu.
When properly selected and operated, Mach III products provide a long service life with little or no maintenenance. Service life varies widely by application due to factors such as speed, load, number of cycles, environment, and other variables. Mach III's engineering department can provide an estimate of lining (friction pad) wear life based on your operating parameters. Contact engingeering for assistance.
