Sign in

Spanner Wrenches For Adjusting Mach III Torque Limiters

clock February 23, 2018 01:22 by author Mach III Clutch

The slip torque setting of a Mach III torque limiter is held by a nut which is locked in place by set screws to apply a specific amount of compression to one or more disc springs. The setting can be changed by tightening or loosening this nut with an adjustable pin spanner wrench. Below are links to spanner wrenches for the various sizes of Mach III torque limiters which are available from a variety of sellers.

2 and 3 Inch Friction Diameter* Torque Limiter Models (0.75 to 2.0” Diameter, 3/16” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • 4 and 5 Inch Friction Diameter* Torque Limiters (1.125 to 3.0” Diameter, 1/4” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • 6 and 8 Inch Friction Diameter* Torque Limiters (4.5 to 6.25” Diameter, 3/8” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • *To determine the “friction diameter” of your Mach III torque limiter, refer to the second character in the product code. For example, the T4X2R-STH torque limiter has a 4 inch friction diameter. For a guide to locating the Mach III Product Code, click here.

    If additional assistance is needed, please contact Mach III Engineering.

    Why Can’t I Find The Part Number I am Looking For On This Site?

    clock August 28, 2014 23:23 by author Mach III Clutch

    part_number_cloudOver our many years in business, Mach III has designed and manufactured more than 2000 unique assemblies that are either slight variations of our catalog products or entirely custom designs.   These custom products make up 75% of the units we produce in an average year.  If the product number of the assembly you are seeking ends in a numeral (as opposed to an alphabetic character), it is a custom unit.  Click Here to find out how to locate the product number.

    Our customer service staff can quickly provide whatever you need,  whether it be a quotation, spec sheet, parts list or product manual.   Click Here for ways to to contact us.

    Does Mach III Do Job Shop Work?

    clock October 23, 2012 00:13 by author Mach III Clutch

    In addition to producing all of the drive hubs, housings, pistons, nuts, adapters, etc. for Mach III designed products, our CNC department does job shop work to the same exacting standards we hold for our own components.  We have experience machining . . .

    • aluminum 
    • alloy steels
    • stainless steels
    • ductile and gray irons 
    • copper & bronze

    Parts can be made in diameters to 15.75 inches.  Send your parts drawings to  info@machiii.com to obtain a quote for material and machining. 

    Which is better for my application, an air set or a spring set unit?

    clock February 9, 2011 01:44 by author Mach III Clutch

    Spring engaged clutch and spring engaged brake designs are only indicated for applications requiring the clutch or brake to remain engaged when the air supply is removed or fails.  A fail safe holding brake would be one example.  Another example can be seen on our Applications page where a spring set brake was used on an Universal Studios attraction.   Additional links:  spring set flange mount brakes, spring set NEMA frame brakes, end of shaft mount spring set clutches - regular duty and heavy duty.  Air engaged clutches and brakes are more suitable for cycling applications.  If there is any question which is best for your application, contact Mach III’s engineering department for a quick answer.

    Should I use a Bronze Bushing or Ball Bearing Pilot Clutch?

    clock March 19, 2010 18:14 by author Mach III Clutch

    The ball bearing pilot clutch is generally recommended.  Mach III has a variety of ball bearing pilot clutches to choose from:  regular duty end of shaft mount, regular duty through shaft mount, heavy duty end of shaft mount and heavy duty through shaft mount.  Bronze bushing pilot clutches are only appropriate in cases where the speed of the clutch is under 200 RPM and the sprocket or pulley that must be mounted on the pilot is too small for the ball bearing pilot version.  Mach III offers bronze bushing pilot clutches in both end of shaft mount and through shaft mount styles.

    Whether using a bronze bushing or ball bearing pilot clutch, properly attaching the pulley or sprocket to the pilot is important if the clutch is to function and wear correctly.  Click here to view Mach III’s eBook on this topic.

    How much air will my Mach III product consume?

    clock March 11, 2010 22:48 by author Mach III Clutch

    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.

    How do I machine a sprocket or pulley to mount on a Mach III product?

    clock March 11, 2010 22:37 by author Mach III Clutch

    The most important thing to 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 a 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:

    The unit torque is rated at 80 psi; what is the torque at 25 psi?

    clock November 21, 2009 01:17 by author Mach III Clutch

    Use the following formula to determine the torque rating at an alternate psi value:

    Torque = (Design Torque x 25 psi) / 80 psi

    Can I get this product with a bore other than the size shown?

    clock October 14, 2009 11:30 by author Mach III Clutch

    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.

    The drawing says there is a wear-in period before the unit reaches its full torque rating. How long will this take?

    clock October 1, 2009 22:51 by author Mach III Clutch
    Wear in is a function of speed, load and cycles.  In most cases a few dozen cycles will achieve the desired burnishing.

    3D Model Request


    Model Type: