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RunRight® Tensioner Devices

  • Cost effective, low maintenance solution
  • Constant torque results in higher belt  or chain life
  • Constant pressure results in dampened vibrations
  • Standard range of sizes, plus many custom options and accessories
RunRight Tensioners

Resources

RunRight Digital Catalog.

RunRight Sell Sheet

RunRight (full catalog) (pdf)

Installation Instructions & Videos

RunRight® Tensioner Product Information

Among the many applications for RunRight tensioners, one of the most common is self-adjusting tensioning of roller chain or belt applications. Overtime, a chain or belt will elongate with use, and the RunRight tensioner, installed correctly, will automatically adjust to correct for slacking or sagging to enable longer and smoother system life.

Install RunRight tensioners on a rigid, flat and clean machine surface using the mounting bolt provided. The frictional contact between the tensioner housing and the machine surface is usually sufficient for proper installation. If the surface of the machine is uneven or highly corroded, a locking pin can be used at the positioning notch for a secure connection to a machine’s irregular surface.

Please do not hesitate to call or ask for help, should you have any question in selecting or installing a RunRight tensioning device. Lovejoy is here to help!

A broad overview of the RunRight tensioner product line is summarized below.

Type RT (Standard)

  • The full standard range of RunRight tensioners
  • Manufactured with the standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available with either inch or metric tensioner idler holes

Type RT N (Oil Resistant)

  • Designed for outdoor or oily applications
  • Manufactured with Tensys® 40 EPDM high temperature resistant inserts, and can be used for applications operating within a 180° to 250°F (80° to 120°C) temperature range
  • Available with either inch or metric tensioner idler holes

Type RT H (High Temperature)

  • Designed for high temperature applications
  • Manufactured with galvanized metal parts and Tensys® 20 oil resistant neoprene inserts, and can be used for applications operating within a -22° to 195°F (-30° to 90°C) temperature range
  • Available with either inch or metric tensioner idler holes

Type RT R (Full Weld)

  • Designed for use on internal combustion engines and compressors
  • Manufactured with fully welded steel arms and standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available with either inch or metric tensioner idler holes

Type RT SS (Stainless Steel)

  • Designed for use in the food and pharmaceutical industries
  • Manufactured with cast stainless steel housings, arms and inner square. They come with the standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available with metric tensioner idler holes

Type RT F (Front Mount)

  • Designed for applications where rear mounting surface is not possible
  • Tensioners include a special mounting screw, spacer bushing, come with the standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available with inch or metric tensioner idler holes

Type RT B (Long Chain)

  • Designed for longer length chain drive applications
  • Manufactured with the standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available with metric tensioner idler holes

Type RT T (High Tensioning Forces)

  • Designed for applications requiring very high tensioning forces
  • Manufactured with fully welded steel arm and inner square. They come with the standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available in two sizes

Type RT P (Plastic Tensioners)

  • Designed for light duty applications where an economical product is required
  • Manufactured with glass-reinforced DuPont Zytel® Nylon with the standard Tensys® 10 rubber inserts and a dual arm design. Tensioners are designed for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available in two sizes
 

Type RT M (Heavy Duty)

  • Designed for large heavy duty applications
  • Manufactured with steel parts with standard Tensys® 10 rubber inserts, and can be used for applications operating within a -40° to 180°F (-40° to 80°C) temperature range
  • Available in 3 large belt drive and 4 large chain drive sizes

Sprocket Wheels & Wheel Sets

  • Available for ANSI #25 to #120 roller chains for single, double and triple strand drives.
  • Available in sets (include idler bolt & nuts) and as individual components
  • Available for both inch and metric tensioner applications
 

Chain Riders & Rider Sets

  • An economical and quitter solution than sprockets
  • For use with chain speeds of 5 ft/sec or less
  • Available in sets (includes idler bolt and nuts) or individually, for both inch and metric tensioner applications
 

Tensioning Rollers

  • Primarily used as back-side belt tensioner
  • Available in either plastic or aluminum
  • Available for metric tensioners

Steel Idler Pulleys

  • Used for the “inside” tensioning of V-Belts
  • Rollers can be used for applications operating within a -40° to 212°F (-40° to 100°C) temperature range
  • Available in 4 sizes

The following are just four classic examples of how RunRight™ tensioners can help a system run smooth.

Belt Service Life – Low maintenance solution that provides a constant torque resulting in a high belt service life.

 
Belt Scrapping – Effectively dampens belt vibrations by applying constant pressure that will continually clean conveyor belts and compensate for scraper wear.
Product Transportation – Accurately transports product by applying constant pressure. Offers a maintenance-free and cost-effective solution while providing a long service life.
Slack Compensation – Double-arm design provides quiet dual slack compensation and diminishes deterioration on rollers and bearing while dissipating system vibrations.

The tensioning force of the RunRight tensioner can be continuously adjusted. The maximum installation tensioning torque is 30˚ from the neutral position. The tensioning forces for the RT, RT N, RT R, RT F and RT SS using the normal hole on the tensioner arm for the idler sprocket, chain and roller accessories are in the chart below. When using the hard hole on the tensioner arm, the tensioning force will increase by approximately 25% from what is shown in this chart.

Tensioning Force

When using the hard hole on the tensioner arm, the tensioning force will increase by approximately 25% from what is shown in this chart.

For mounting bolt tightening torques and other performance characteristics, please see the full RunRight catalog.