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Guardian Modified Gear Grip Couplings for HVAC Cooling Blowers
A large hospital in Phoenix, Arizona needed a replacement couplings for their HVAC
cooling blowers. The relatively long couplings, positioned between the electric motor
and the squirrel cage blower assembly, were prematurely failing due to excessive
vibration. These repeated failures caused sporadic periods of unacceptable discomfort
for patients, staff and visitors.
The blower OEM looked to Guardian for a reliable coupling solution. To meet the
non-standard coupling length requirements, Guardian engineers developed a modified
12.5" (317 mm) long Gear Grip coupling. The new coupling features a reinforced
Neoprene rubber sleeve compound which provides excellent torsional vibration
dampening, absorbs load pulsations and minimizes drivetrain shock. Due to the
extended length, the coupling was reinforced with 2.5" (63 mm) aluminum tubing
for added strength. The coupling has a maximum torque capacity of 4,700 in.lbs.
(531 Nm) and a maximum speed rating of 5,600 RPM.
Guardian Gear Grip 3-piece couplings feature non-corrosive metal ends and rubber
compound (Neoprene or Urethane) sleeves that are not affected by moisture, dirt and
abrasives. The units require no lubrication and there is no metal-to-metal contact even
when coupling shears. “By-eye” alignment eliminates precise measurement, minimizes
assembly time and allows for “blind” assembly.
Highlights
- Modified 12.5" (317 mm) long Gear Grip coupling
- 4,700 in.lbs. (531 Nm) maximum torque capacity
- 5,600 RPM maximum speed rating
- 1- 3/16" (30 mm) diameter bores (both ends)
- Neoprene rubber sleeve compound provides excellent torsional vibration dampening
- Reinforced with 2.5" (63 mm) aluminum tubing for added strength