Bearing housing can be Pillow block bearing and housing, Plummer block housing and bearings, split Plummer block housing which is a mounted anti-friction bearing that is contained within a solid cast iron, ductile iron or cast steel housing unit. Bearing housing can be called housed bearing unit, meaning they are self-contained, greased, sealed and ready for installation on the equipment. They are used to support a rotating shaft loading. You can choose pillow block housing and Plummer block housing according to its shaft diameter, shaft height, shaft size and its speed and load.

Here we will introduce that the most common shaft locking device set screw or set collar, utilizing a fixed and expansion unit, but the general guidelines apply to all bearing installs.

1) Check and Clean the Shaft
First, check your shafting to ensure it is clean, round, straight, free of burrs and nicks and is not undersized or oversized, per the manufacturers specification. Use fine sandpaper or scotch bright to clean the shaft of any rust. Then use a light coat of oil to remove any debris. 
 

2) Position the Bearings on the Shaft
When placing the bearing on the shaft, if it is necessary to tap the bearing into place, use a mallet and a hardwood block or soft steel tube against the inner ring. DO NOT strike or exert pressure on the housing or seals.

3) Lightly Bolt the Housing to the Mounting Structure
Locate the shaft in position by lightly bolting the housing to the mounting structure. Bridge over the housing mounting bolt slots with heavy washers, or heavy spring lock washers. This may help prevent loosening.

4) Establish the Final Mounting Position
Prior to securing the bolts, establish your final mounting position by aligning the bearing units by hand or a rubber mallet. 

5) Securely Bolt the Housing to the Mounting Structure
Once the bearing is properly aligned, securely bolt both units to the mounting structure.

6) Ensure the Shaft can Move Axially
Ensure that the shaft can move axially through the bearing bores to confirm proper alignment. If this cannot be done, loosen the housings and realign the shaft. 

7) Tighten Both Collar Set Screws
Tighten both collar set screws, and then rotate the shaft and alternately tighten to the manufacturer recommended torque values. If a torque wrench is not available, tighten the set screws until a permanent twist is established with an allen wrench. 

If you are using an expansion unit, always lock the fixed bearing first. Move the expansion bearing axially to center in the housing. Once centered, alternately tighten the set screws on the expansion unit as you did on the fixed unit.