Pillow Block Bearings

1. Description

Pillow Block Bearings, also known as Plummer Blocks, are mounted bearings used to provide support for rotating shafts with the help of compatible bearing inserts. LOCUS pillow block bearings are manufactured with high precision by Adarsh Bearings Pvt. Ltd. and are suitable for high-load and high-speed applications.

2. Specification

• Housing: Cast Iron / Ductile Iron
• Insert Bearing: Chrome Steel (SAE 52100)
• Bore Size: 12 mm to 90 mm
• Mounting: 2-bolt / 4-bolt options
• Lubrication: Grease nipple provided
• Dynamic Load Rating: As per ISO standards
• Speed: Up to 6000 RPM

3. Working

Pillow block bearings support a rotating shaft and absorb radial and axial loads. The inner bearing rotates with the shaft while the outer housing remains stationary, mounted to a base. Grease lubrication minimizes friction, ensuring smooth operation.

4. Principle

The bearing insert inside the pillow block uses rolling elements (balls or rollers) to reduce friction between the moving shaft and the stationary housing, supporting load transmission while allowing free rotation.

5. Assembly

1. Position the bearing on the shaft.
2. Secure bearing to the shaft using set screws or locking collar.
3. Bolt the housing base to the mounting surface.
4. Apply grease through the nipple.
5. Rotate shaft manually to check alignment.

6. Installation Process

• Ensure the shaft and bearing are clean and free from burrs.
• Slide the bearing onto the shaft.
• Align the housing to match bolt holes.
• Tighten bolts gradually and evenly.
• Grease the bearing.
• Run the shaft at low speed for trial.

7. Technical Specification

8. Troubleshooting

9. HS Codes

• HS Code (India): 8483.20.00 – Bearing Housings, Incorporating Ball or Roller Bearings
• Global HS Code: 8483.20

10. FAQ

Q1: What is the difference between pillow block and plummer block? A: Both support rotating shafts, but plummer blocks are typically used in heavier-duty applications.

Q2: Can pillow block bearings be reused? A: Yes, if not worn or damaged, both housing and bearing insert can be reused.

Q3: Are LOCUS pillow blocks suitable for outdoor use? A: Yes, they are sealed and pre-lubricated, suitable for outdoor and dusty environments.

Q4: How often should I grease the bearing? A: Every 6 months for normal use, more frequently in harsh conditions.

11. Applications

• Conveyor Systems
• Agricultural Equipment
• Textile Machinery
• Mining and Construction Machinery
• HVAC Fans and Blowers
• Industrial Gearboxes
• Packaging Equipment
• Material Handling Units