51mm id 65mm od bearing isolator hvac blower

SAF, SAFD, SNH, and SNL pillow blocks are available with stepped shaft designs. No feeler gauges, charts, adjustments, or measurements are required. The millwright merely has to heat up the bearing and mount it on the shaft. Stepped shafts are more expensive, but have the advantage of taking the human element out of bearing mounting. They use tapered bore bearings with adapter sleeves to mount the bearings correctly. This style of block is available with oil lubrication only.Īll of the above pillow block styles are normally supplied for straight shafts. This problem is caused by the location of the automatic oiler on the housing. The most common complaint for this type is that the seals leak oil. SAF and SAFDĪnother common fan pillow block is the split-babbitt design. Mounted bearing units are available off-the-shelf and the only selection information necessary is shaft size, radial and thrust load, load characteristics, speed, and environment. They are convenient and economical, and reduce the time spent selecting and preparing bearing elements, seals, and mounting methods. Mountings or pillow blocks are available for most types of rolling element bearings. Many common problems are caused by the improper selection of pillow block housings, seals, bearings, lubricant, and lubrication systems. If all fans and blowers ran at 1200 rpm, their reliability would be very high however, most run at 1800-3600 rpm or higher. The higher the speed, the more problematic they become. Oil lubrication is preferred over grease for bearings.įans and blowers are simple pieces of equipment, yet require a lot of maintenance, particularly for bearings. Oversized bearings can be lightly loaded and fail.

Proper pillow block and seal selection help avoid bearing problems. Nick Agius, Commercial Bearing Service, Ltd., Edmonton, AB, Canada

Feature: Solutions to fan and blower bearing problemsĪdvantages of oil lubrication in fan bearings

51mm id 65mm od bearing isolator hvac blower