Mud Pump Bearing Solutions
Mud Pump Bearings
for Power-End and Gearbox Applications
TEDIN supplies cylindrical roller, spherical roller, tapered roller and application-specific bearings for mud pump power ends and associated gearboxes. Send your full bearing designation, pump model or drawing for selection and replacement review.
Bearings for Mud Pump Power Ends
TEDIN supplies cylindrical roller, spherical roller and tapered roller bearings for mud pump power ends and gearboxes. To check a replacement, send the pump model, the full bearing number or an assembly drawing.
The bearing required depends on its position in the pump. A crankshaft bearing and a pinion shaft bearing may have different load and locating requirements, even within the same power-end assembly.
For replacement enquiries, include any suffixes shown on the bearing marking. If the number is missing or unreadable, send photos of the bearing and its installation position, along with the available dimensions.
Where the Bearings Fit
Crankshaft and pinion shaft bearings do different jobs in the power end. Pumps with a separate gearbox also have bearing arrangements that need to be checked against the gearbox drawing.
| Installation Position | Bearing Duty | What to Check |
|---|---|---|
| Crankshaft Supports | Support the crankshaft under loads transmitted through the connecting rods and drive gear. | Bearing number, internal clearance, shaft and housing fits, and the locating arrangement at each end. |
| Pinion Shaft Supports | Support the drive pinion and carry gear-mesh loads. Helical gears also produce axial thrust. | Gear type, bearing arrangement, axial locating features and lubrication path. |
| Separate Gearbox Shafts | Support the input, intermediate or output shafts where a separate gearbox is fitted. | Gearbox model, shaft position, operating speed and the original bearing designation. |
Roller Bearings for Mud Pump Assemblies
Bearing types handle loads and shaft movement differently. Match the replacement to the original bearing and assembly drawing.
Cylindrical Roller Bearings
Carry heavy radial loads, with axial movement depending on the bearing design. Check the full bearing number, including its prefix and suffixes.
Spherical Roller Bearings
Carry radial and axial loads while allowing some shaft misalignment. Check the bore type, internal clearance and mounting sleeve, if fitted.
Tapered Roller Bearings
Carry radial and axial loads, often in opposing pairs. Check the inner and outer ring numbers and the required endplay or preload.
Mud Pump Models and Bearing References
Use this table as a reference. Confirm the full bearing number and installation position against the pump parts list or assembly drawing.
| Pump / Gearbox Model | Bearing Reference | Installation Position |
|---|---|---|
| 600 Pump | NJ18/203.2/C3W33/YBP5 | Power end |
| 600 Pump | NU18/292.1/C3W33/YBP5 | Power end |
| 600 Pump | NFP18/292.1/C3W33/YBP5 | Power end |
| 600 Gearbox | (LM739749/LM739710)/P5 | Large gear shaft |
| 600 Gearbox | 744/742/P5 | — |
| 1000 Pump | NJ18/203.2/C3W33/YBP5 | Power end |
| 1000 Pump | NU18/292.1/C3W33/YBP5 | Power end |
| 1000 Pump | NFP18/292.1/C3W33/YBP5 | Power end |
| 1000 Gearbox | LM742749/LM742710/P5 | Large gear shaft |
| 1000 Gearbox | 98316/98788/P5 | Pinion shaft |
| 2500 Pump | N18/406.3/C9W33/P5 | Main shaft — intermediate floating supports |
| 2500 Pump | NFP18/393.7/C3W33/P5 | Main shaft — end locating supports |
| 2500 Pump | 23936CC/W33/P5 | Power end |
| 2500 Pump | NF18/406.3/C9W33/P5 | Power end |
| 2800 Pump | N18/406.3/C9W33/P5 | Main shaft — intermediate floating supports |
| 2800 Pump | NFP18/393.7/C3W33/P5 | Main shaft — end locating supports |
| 2800 Pump | 23038CC/W33/P5 | Power end |
| 2250 Pump | N18/406.3/C9W33/P5 | Main shaft — intermediate floating supports |
| 2250 Pump | NFP18/393.7/C3W33/P5 | Power end |
| 2250 Pump | 23036CC/W33C3/P5 | Power end |
| 2500 Pump | CWE-N5245/W33C3/P5 | Main shaft — intermediate floating supports |
| 2500 Pump | CWE-NP5495/W33C3/P5 | Power end |
| 2500 Pump | 23036MB/W33C3/P5 | Power end |
| 10000 Pump | NU10/550X1/HB/P5 W33 | — |
| 10000 Pump | NU10/548X1/HB/P5 W33 | — |
| 10000 Pump | NU00/548X3/HB/P5 W33 | — |
| 2500 Pump | GD-N5245/W33C3/P5 | Main shaft — intermediate floating supports |
| 2500 Pump | GD-NFP5295/C3W33/YBP5 | Main shaft — end locating supports |
| 2500 Pump | 23038MB/C3W33/P5 | Power end |
| 2800 Pump | N18/406.3/C9W33/P5 | Main shaft — intermediate floating supports |
| 2800 Pump | NFP18/393.7/C3W33/P5 | Main shaft — end locating supports |
| 2800 Pump | 23038MB/W33/P5 | Power end |
| 400 Pump | N18/336.5X1C3/P5 | — |
| 400 Pump | N18/336.5X2C3/P5 | — |
| 400 Pump | H-1922-C/P5 | Power end |
| 400 Pump | H-1836-C/P5 | Power end |
| 400 Pump | NU18/80C3/P5 | Power end |
| 400 Pump | NJP18/80C3/P5 | Power end |
Flanges, Clearance, Lubrication and Bearing Suffixes
The full designation matters. Check the bearing design and suffix requirements against the original specification before ordering.
Locating or Floating Support
N, NU, NJ and NF designs differ in flange arrangement and axial movement. For NFP, NJP and other special prefixes, check the drawing rather than assuming a standard configuration.
Confirm the Required Clearance
C3 specifies greater radial internal clearance than Normal for the relevant bearing type. Special codes such as C9 need a defined clearance range from the original specification or drawing.
Match Oil Grooves and Holes
W33 commonly indicates an outer-ring lubrication groove and holes on spherical roller bearings. For special cylindrical designs, verify the number, size and position of these features on the drawing.
Keep the Complete Designation
P5 identifies a precision class, not a load rating. Confirm cage codes such as CC or MB and special codes such as YB or HB with the original manufacturer's specification. Keep all prefixes and suffixes in the inquiry.
Operating Factors for Mud Pump Bearing Selection
Pump model alone does not define the bearing requirement. Review the loads, speed and service conditions at the actual installation position.
Loads and Shock
Bearing loads change as the pump runs. Check radial and axial loads, including peaks during starts and pressure changes.
Shaft Speed and Duty
Check the bearing shaft speed, not just motor speed. Include daily running hours, frequent starts and low-speed operation.
Operating Temperature
Heat changes bearing fits and clearance. Check normal running temperatures and any past overheating.
Oil Supply and Viscosity
Bearings need a steady supply of suitable oil. Check oil delivery and viscosity at operating temperature.
Water and Dirt
Water and particles in the oil can damage bearings. Check seals, filters and oil condition.
Alignment and Bearing Seats
Misalignment and worn bearing seats can cause uneven loading. Check shaft alignment and bearing seats on both the shaft and housing before replacement.
Replacement and Custom Bearing Review
Send the full bearing number or drawing for review. For discontinued or non-standard bearings, include the dimensions and installation details.
| Review Item | What to Provide | What to Confirm |
|---|---|---|
| Original Bearing | Full bearing number, original brand and clear photos of the markings. | Identify the original design and any special requirements before proposing a replacement. |
| Drawing or Sample | Bearing drawing with dimensions and tolerances, or details of an available sample. | Check bore, outside diameter, width and ring features. A worn sample may not show the original dimensions. |
| Installation Details | Pump model and bearing position, plus shaft and housing drawings where available. | Check fits, axial location and available space. Matching overall dimensions alone is not enough. |
| Custom Supply Requirements | Required quantity, any design changes, inspection documents and target delivery date. | Confirm technical feasibility, inspection scope and lead time before ordering. |
No drawing available? Start with the bearing markings, clear photos and measured dimensions. Final specifications should be confirmed before ordering.
Mud Pump Bearing FAQs
Answers to common questions about replacement bearings, custom requirements and quotation details.
What information do you need for a quotation?
Send the full bearing number, including any suffixes, and the required quantity. A bearing drawing or clear photos of the markings are also helpful. Include the pump model and bearing position where available.
Can a bearing with the same dimensions replace the original?
Not necessarily. Matching bore, outside diameter and width is only the first check. The internal design, load capacity, clearance or setting, cage and lubrication features must also suit the installation.
Can you review a bearing if the number is unreadable?
Yes. Start with clear photos, measured dimensions and the bearing's installation position. Shaft and housing drawings can help narrow down the requirements. Photos and dimensions alone may not identify the exact internal design, so further checks may be needed.
Do bearing suffixes need to match exactly?
The requirements represented by the suffixes need to match, but the letters and numbers may differ between manufacturers. Send the complete original designation so clearance, accuracy, cage and lubrication details can be checked before a replacement is proposed.
Can you review discontinued or non-standard bearings?
Discontinued and non-standard bearings can be submitted for review. Provide the original drawing, dimensions, installation details and required quantity. Supply feasibility must be confirmed for each design; a worn sample alone is not a complete manufacturing specification.
How are lead time and inspection documents confirmed?
Lead time depends on the bearing specification, quantity, stock availability and any custom requirements. State the inspection reports or traceability documents you need when requesting a quotation, so their availability and scope can be confirmed before ordering.
Send Your Mud Pump Bearing Model or Drawing
Send the full bearing number or drawing and the quantity you need. If the markings are unreadable, start with photos and measured dimensions. Include the pump model and bearing position to help TEDIN review replacement suitability and supply options.