UCP213-40

• Dimensions

  Attachment bolt diameter	19.05 mm
  Shaft diameter	63.5 mm
  Centre height (pillow block)	76.2 mm
  Housing overall width	72 mm
  Centre distance between bolt holes	203 mm
  Bearing width, total	65.1 mm

  Performance

  Basic dynamic load rating	57.2 kN
  Basic static load rating	40 kN
  Oil Limiting speed	2350  r/min

• Properties

  
  

  Housing type	Pillow block, normal base
  Number of bolt holes for fasteners	2
  Fastening bolt hole type	Plain
  Retaining feature, inner ring	Set screws
  Bore type	Cylindrical
  Material, housing	Cast iron
  Material, bearing	Bearing steel
  Coating	Without
  Sealing, bearing	Seal and flinger on both sides
  Sealing type	Contact, standard
  Sealing, unit	Without
  Lubricant	Grease
  Relubrication hole	With
  Grease fitting	With

• Weight and Material

  Product net weight

  6.63kg

1. What should be noted when installing UCP series bearings?

Proper installation is critical. Below are key steps and precautions:

Before installation: Inspect the shaft for flatness and ensure mounting holes are aligned. Clean the shaft and bearing housing, 

then apply a thin layer of oil to the shaft surface.

During Installation: Position the unit onto the shaft at the designated location, ensuring the bearing housing is level and centered with the shaft. 

When tightening the housing mounting bolts, use a diagonal cross-tightening method to prevent housing deformation. 

Subsequently, evenly tighten the set screws on the inner ring to secure it to the shaft.

After Installation: Manually rotate the shaft to confirm smooth rotation without binding.

2. How to address shaft misalignment?

The self-aligning capability of the UCP series accommodates limited shaft misalignment (typically ±3°). However, exceeding the permissible range

 may cause increased vibration and accelerated wear. Therefore, during installation, rigorously inspect the flatness and concentricity of the 

mounting base. If misalignment is dynamic, supplement with regular monitoring.

8. Does the UCP series require maintenance? How is relubrication performed?

Yes, regular maintenance significantly extends bearing life.

Periodic inspection: Assess for abnormalities such as noise, vibration, or temperature rise by examining appearance and operational status.

Grease replenishment: The UCP series typically features grease nipples for relubrication. It is recommended to 

replenish with the same type of lithium-based grease (e.g., NLGI 2) using a grease gun every 6-12 months.

 Replenishment should ideally be performed during low-speed operation or while manually rotating the shaft to ensure even distribution of grease within the bearing.

Troubleshooting

3. What are the potential causes of fracture in UCP series bearing housings or fixing bolts?

Based on case studies and engineering experience, common causes include:

Alternating Stress: Cyclic stresses present during equipment operation are a primary cause of metal fatigue, leading to bearing housing or bolt fractures.

Assembly Issues: Misalignment between the shaft and housing during installation subjects the housing to abnormal loads.

Stress Concentration: Fractures typically occur in stress-concentrated areas like bolt holes or flange roots. 

Design flaws or casting defects may exacerbate this issue.

Bearing Housing Quality: Substandard materials (e.g., poor-quality cast iron) or casting defects can also cause the housing to crack during use.

4. How to select the appropriate UCP bearing model?

Consider the following key parameters during selection:

Shaft diameter: This is the primary parameter and must match your shaft diameter.

Load capacity: Verify the bearing's basic dynamic and static load ratings against your equipment's load conditions to ensure adequacy.

Mounting dimensions: Confirm that the bearing housing's mounting hole spacing and center height match your equipment frame.

Operating environment: Consider special conditions like dust, moisture, high temperatures, 

or corrosion to select appropriate seal types and materials.