Fluid Film Bearings
Engineered Fluid Film Bearings & Custom Babbitt Solutions for Critical Rotating Equipment
ZB Bearings is an ISO 9001:2015 certified manufacturer specializing in high-performance Babbitt bearings (hydrodynamic journal and thrust bearings) and custom sealing components for critical rotating equipment.
Since 2007, we have delivered over 500 unique custom designs for turbines, compressors, motors, and pumps worldwide. As a trusted engineering partner, we deliver precision OEM-interchangeable replacements designed to withstand severe operating conditions, mitigate rotor vibration, and minimize unscheduled plant downtime.
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![Journal Bearing]()
Journal BearingA journal bearing is a type of sliding bearing that utilizes a lubricating oil film to support a rotating shaft. During operation, a stable oil film forms between the journal and the bearing...read more -
![Flanged Steel Sleeve Bearing]()
Flanged Steel Sleeve BearingFlanged Steel Sleeve Bearings are sliding bearings used in heavy-duty, low-speed, and continuously operating equipment. The products utilize a high-strength steel base and employ a lubricating...read more -
![Journal Thrust Bearing]()
Journal Thrust BearingJournal Thrust Bearing is a sliding bearing that integrates radial support and axial thrust bearing functions, and is mainly used in large, continuously operating rotating equipment.read more -
![Fluid Film Thrust Bearing]()
Fluid Film Thrust BearingFluid Film Thrust Bearing is a type of sliding bearing used in large rotating equipment. It withstands axial loads and reduces friction and wear by forming a stable oil film between the thrust...read more -
![Taper-land Thrust Bearing]()
Taper-land Thrust BearingTaper-land Thrust Bearing is a high-performance sliding bearing used in large rotating equipment. It reduces metal-to-metal contact, friction and wear, and improves equipment operational stability...read more -
![Plain Journal Fluid Film Bearing]()
Plain Journal Fluid Film BearingPlain Journal Fluid Film Bearing is a high-performance sliding bearing for industrial rotating equipment. It forms a stable oil film through journal rotation, reducing direct contact between the...read more -
![Tin Bronze Thrust Bearing]()
Tin Bronze Thrust BearingTin Bronze Thrust Bearing is a sliding bearing used in industrial rotating equipment. Made of high-strength tin bronze, it reduces metal-to-metal contact by forming a stable lubricating film,...read more -
![Pad Thrust Bearing]()
Pad Thrust BearingPad Thrust Bearing is a type of sliding bearing used in large rotating equipment. It withstands axial loads and reduces friction, wear, and vibration by forming a stable oil film between the...read more -
![Tilting Pad Thrust Bearing]()
Tilting Pad Thrust BearingTilting Pad Thrust Bearings are fluid sliding bearings used in large rotating equipment. They utilize a stable oil film formed between the tilting pads and the thrust disc to withstand axial...read more -
![Tilting Pad Thrust Bearing Assembly]()
Tilting Pad Thrust Bearing AssemblyThe Tilting Pad Thrust Bearing Assembly is a fluid sliding bearing assembly used in large rotating equipment, primarily in steam turbines, compressors, generators, and other similar devices.read more -
![Pedestal Pad Thrust Bearing]()
Pedestal Pad Thrust BearingPedestal Pad Thrust Bearing is a fluid film bearing designed to support axial loads generated by rotating shafts and maintain precise rotor positioning through optimized pad design and oil...read more -
![Babbitt Combination Bearing]()
Babbitt Combination BearingBabbitt Combination Bearing is a custom sliding bearing that integrates journal bearing and thrust bearing functions into one assembly.read more
Capability Range & Typical Technical Specifications
The table below showcases a typical standard production sample. ZB Bearings customizes all dimensions, clearances, and tolerances according to your specific rotor dynamic requirements. Both Metric (mm) and Imperial (inch) configurations are fully supported.
|
Parameter Code |
Technical Specification |
Capability Range / Sample Value |
|
- |
Bearing Type |
Hydrodynamic Journal Bearing |
|
B |
Bore Diameter |
3.2500 in (82.55 mm) |
|
D |
Housing O.D. |
5.0000 in (127.00 mm) |
|
W |
Bearing Total Width |
3.5000 in (88.90 mm) |
|
A |
Babbitt Lining Thickness |
0.0400 in (1.016 mm) |
|
Ri |
Inner Chamfer / Fillet |
0.1220 in (3.10 mm) |
|
Ro |
Outer Chamfer / Fillet |
0.0591 in (1.50 mm) |
|
M |
Bearing Weight |
8.82 lb (4.00 kg) |
|
C |
Max Allowable Load |
47,435 lb (211 kN) |
|
Db |
Babbitt Bore Clearance |
0.0035 in (0.089 mm) |
|
P |
Oil Hole Diameter |
0.3752 in (9.53 mm) |
Product Categories & Applications
Explore our engineered lineup of hydrodynamic fluid film bearings and custom Babbitt seals. All components are machined to micron-level tolerances and tailored to specific rotor dynamic alignments.
|
Bearing / Seal Type |
Core Design Features |
Primary Application |
|
Profiled Bore Journal Bearings |
Plain cylindrical, lemon-bore, offset-halves, & multi-lobe designs; suppresses oil whirl/whip. |
High-speed industrial rotating machinery & gearboxes. |
|
Tilting Pad Journal Bearings (TPJB) |
Zero-cross-coupling stiffness; stabilizes rotors operating above their first critical speed. |
Critical API 617 centrifugal compressors & steam turbines. |
|
Hydrodynamic Thrust Bearings |
Fixed-taper land or tilting pad designs (equalizing / non-equalizing); absorbs heavy axial thrust. |
High-load turbomachinery & heavy-duty process pumps. |
|
Custom Babbitt Seals & Labyrinth Packings |
Precision-machined clearance gaps for high-efficiency oil containment & gas-path sealing. |
Turbo-compressors, utility turbines, & blowers. |
Customized Fluid Film Bearing Manufacturing
ZB Bearings provides custom fluid film bearing solutions based on specific equipment requirements and operating conditions.
|
Customization Pillar |
Scope & Available Options |
|
Geometry & Structures |
Journal, thrust, split sleeve, and tilting pad designs; custom L/D ratios and clearance profiles. |
|
Material Metallurgy |
Certified ASTM B23 Grade 2 (ISO SnSb7.5Cu3.5 / SnSb8Cu4 equivalent) or tailored lead-based alloys. |
|
Fluid Dynamics |
Optimized oil grooves, directional lubrication features, and inlet/outlet port sizing. |
|
Sensor Integration |
Pre-machined slots and counterbores for duplex RTDs or Thermocouples (real-time monitoring). |
|
OEM Reverse Engineering |
1:1 manufacturing based on customer drawings, specification sheets, or worn physical samples. |
ZB Bearings provides precision-engineered, 100% interchangeable fluid film bearing replacements for major global rotating equipment OEMs, including but not limited to:
Turbines & Compressors: General Electric (GE), Siemens, Elliott, Mitsubishi, Solar Turbines, Sulzer.
Motors & Generators: ABB, TECO-Westinghouse, WEG, Siemens.
Our 4-Step Engineering & Customization Workflow
Input & Intake
Submit 2D/3D CAD models, operational data (RPM, loads, oil viscosity), or ship worn samples directly for reverse-engineering.
Simulation & Optimization
In-house hydrodynamic simulation of oil-film thickness and pressure profiles to ensure full compliance with API 612 / 617 standards.
Precision Manufacturing
CNC-controlled programmable centrifugal casting ensures a void-free, high-density Babbitt-to-steel bond, followed by multi-axis CNC machining and grinding to micron-level tolerances. Every part passes 100% Non-Destructive Testing (NDT).
Global Logistic
Anti-corrosion oil treatment, vacuum-sealed polymer wrapping, and heavy non-fumigation wooden crating for safe international transit.
Critical Problems We Solve
Industrial plants and maintenance engineers turn to ZB Bearings when original equipment bearings fail or underperform. Our custom fluid film bearings are engineered to solve common machinery vulnerabilities:
Oil Whirl & Oil Whip Mitigation
Custom multi-lobe or tilting pad geometries reshape the oil film pressure profile to stabilize high-speed shafts.
Thermal Management
Optimized oil groove geometry and directional lubrication features eliminate localized hot spots and prevent thermal degradation of the Babbitt.
Fatigue & Wiping Prevention
High-density bonding prevents sub-surface fatigue cracking under heavy shock or cyclic loads.
Our fluid film bearings are meticulously engineered and manufactured to strictly meet or exceed the rigorous technical requirements of global rotating equipment standards:
API 617: Centrifugal and Axial Compressors for Petroleum, Chemical, and Gas Industry Services.
API 612: Petroleum, Petrochemical, and Natural Gas Industries—Steam Turbines.
API 684: Tutorial on the Rotor Dynamics Technical Forum (Design & Stability Criteria).
ISO 4386 / ASTM E114: Non-destructive testing standards for metallic multilayer plain bearings (Ultrasonic & Penetrant bond testing).
Target Industries
Power Generation: Steam Turbines, Gas Turbines, Hydro-generators, Utility Boiler Feed Pumps, and Synchronous Condensers.
Oil & Gas / Petrochemical: API 617 Turbo-compressors, High-pressure Process Pumps, Centrifugal Blowers, and Pipeline Pumps.
Marine Engineering: Main Propulsion Shaft Bearings, Marine Turbochargers, and Turbo-Generator Sets.
Heavy Industry: High-speed Pinion Shaft Gearboxes, Large Mining Mills, Cement Kilns, and Large Industrial Fans/Blowers.
Production Infrastructure & QC Capacity
Advanced Manufacturing
• Babbitt Bonding: Programmable Centrifugal Casting for cylindrical shells and gravity pouring with controlled pre-tinning for complex flat pads, achieving uncompromised uniform bond layers.
• CNC Machining: Multi-axis CNC centers and cylindrical grinders holding inner/outer diameter tolerances within ±0.005 mm.
Rigorous Quality Control
• Ultrasonic Testing (UT): 100% volumetric bond inspection of the Babbitt-to-steel interface per ISO 4386-1 / ASTM standards to guarantee zero bonding defects.
• Liquid Penetrant Testing (PT): Post-machining inspection to verify zero surface porosity, pinholes, or micro-inclusions.
• Chemical Analysis: Optical Emission Spectrometer testing on every heat of Babbitt alloy to verify strict chemical composition before casting.
• Documentation Pack: Full CMM metrology dimensions, UT/PT certificates, raw material mill test certificates, and a Certificate of Conformity (CoC) shipped with every order.
FAQ
We are one of the most professional fluid film bearings manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy customized fluid film bearings at competitive price from our factory. If you have any enquiry about free sample, please feel free to email us.