Intech Power-Core Thermoplastics Engineering Blog

Eliminating Noise , Malfunction, And Skidding In Sliding Door Rollers

Posted by Alexander Bartosch on Jan 2, 2014 3:15:00 PM

Of all the maintenance headaches associated with sliding doors, rollers cause most of the pain.

Bombardier Station Door Roller resized 600

Metal rollers, while still the default choice for heavy doors, require ongoing lubrication. And even when lubricated, metal rollers can eventually wear out the door track. Plastic rollers, which are too often made from common engineering thermoplastic materials, lack dimensional stability when exposed to temperature extremes and moisture. They also tend to creep, developing flat spots under static load.

When poorly designed or maintained, both metal and plastic rollers can also be noisy. In the case of metals, the noise occurs because of the metal-on-metal contact with the track. In the case of plastics, the dimensional changes and flat spots make for a rough, noisy ride.

We’ve been able to address the most common pain points associated with sliding door rollers by combining Power-Core™ materials with high-end roller bearings. These hybrid rollers have started to appear in a variety of sliding doors, including ones with

  • High-cycle requirements
  • Heavy loads
  • Demanding operating environments

These applications include cargo van doors, mall security doors, machine tool doors and more. Power-Core rollers have a number of advantages over both metals and other plastics in sliding door applications:

  • What goes around stays round. Power-Core produces highly concentric rollers that stay that way in use. The concentricity comes from precision machining of roller surfaces. And the dimensional stability is an intrinsic material property. Unlike most polymers, Power-Core does not swell if exposed to moisture. Its also stable across a wide operating temperature range of - 40 to 80ºC.
  • No flat spots. Power-Core features an entirely crystalline molecular structure that makes it more resistant to creep that results in flat spots when rollers are statically loaded over time.
  • A nice quiet ride. Power-Core rollers can damp vibration more effectively than metals. Power-Core also exhibits lower rolling resistance than metals. Taken together, these two factors result in sliding doors that operate smoothly and quietly.
  • Keep on rolling. Power-Core rollers eliminate the metal-on-metal wear that can prematurely end of the life of metal sliding door rollers and tracks. And Power-Core needs no lubrication to keep rolling.

For more information on sliding door applications—including load capabilities and design tips—read our sliding door white paper.Overmolded Plastic Roller Alternative

Dowload Your Sliding Door Whitepaper

Tags: roller design, roller bearing, Heavy Duty Rollers, over molded rollers, sliding door hardware, van door rollers, train door rollers, Acetal rollers, UHMW rollers, Neoprene Rollers, Nylon Rollers

Guide Rollers Provide Secure Fit Under Varying Loads & Temperature

Posted by Alexander Bartosch on Aug 13, 2009 3:24:00 PM

Intech was selected by Bombardier to provide replacement rollers for the platform safety door on the Orlando People Mover System.

Bombardier Transportation, with a reputation for excellence in designing high capacity urban transit systems and automated people movers, required longer wear-life rollers, with increased reliability to reduced maintenance. Our design engineers at Intech Corporation, explored how the engineered Intech powercore rollers might address Bombardier Transportation’s requirements.

 

Concave Rollers For Sliding Door Hardware

Concave Rollers for Guide Door Openings Once application details, including angle, load, door weight, linear speed, temperature variations, humidity levels, rail material and cycling information were presented, Intech was able to custom design a concave roller. The assembly features a precision machined Intech Power-Core™ tire thermally installed over a sealed ball bearing. At a radial load of 100 lbs. per roller running at 53.82 ft/min, Intech determined roller performance life of between 500 to 700 million door-opening cycles, which could potentially provide the Orlando International Airport with 5 to 7 years of quiet, trouble-free and maintenance-free operation.

Intech Power-Core™ rollers do not absorb moisture and maintain outstanding performance characteristics throughout a temperature range that extends from -40°F to 140°F. The precision thermal-fit tire is credited with providing a reliable and secure fit under varying load and temperature situations.

After one year of continuous operation, there are no visible signs of wear on the roller surface. Additionally, Intech Power-Core™ rollers are being installed on the heavy 200 lb. glass station doors in order to reduce noise and increase resistance to grinding and wear. Station door rollers for Leg A2 are in the process of being replaced at the Orlando site with Intech Power-Core™ replacement rollers. Bombardier field technicians are installing the replacement rollers and, where applicable, will ensure that they are timed to open and close at precision-controlled intervals so that the doors orchestrate perfectly with the opening of train doors to provide a safe, smooth passage.

Please download a white paper showing many of the applications and advantages of intech rollers:

Learn More

Tags: Power-Core, reduce noise, wear life, sliding door hardware, Intech rollers, roller life, guide rollers