Babbitt Bearings
Custom Babbitt Bearings & Fluid Film Bearings | ISO 9001 Manufacturer
In critical rotating industries, unexpected downtime is not an option. As an ISO 9001:2015 certified manufacturer of premium babbitt (whitemetal) and fluid film bearings, ZB Bearings delivers the millisecond reliability your plant demands.
Combining decades of expertise with an ISO 9001:2015 certified quality system, we engineer standard and fully customized hydrodynamic bearings that exceed stringent global standards. From high-speed turbo-compressors to high-load hydro-generators, our bearings ensure low friction, superior embeddability, and maximum shaft protection under the most demanding operating conditions.
-
![Babbitt Flanged Bearings]()
Babbitt Flanged BearingsBabbitt Flanged Bearings are fluid film journal bearings that combine a flange mounting structure with a Babbitt-lined sliding surface.read more -
![Babbitt Bearing]()
Babbitt BearingThe Babbitt bearing is a high-performance sliding bearing consisting of a steel backing and a Babbitt alloy lining; it is primarily used in large rotating equipment such as steam turbines,...read more -
![Sleeve Babbitt Bearing]()
Sleeve Babbitt BearingThe sleeve Babbitt bearing is a type of sliding bearing used in large rotating equipment; it consists of a metal base and a Babbitt alloy lining, forming a composite structure through a reliable...read more
Product Specification & Dimensional Range
The table below outlines our standard dimensional parameters for technical reference. All Babbitt bearings can be precision-machined to meet custom clearance and tolerance specifications.
|
Nominal Shaft Size (Inch) |
Bearing OD (mm) |
Bearing ID (mm) |
Pad Thickness (mm) |
Housing OD (mm) |
Bearing Height (mm) |
Key Length (mm) |
Bearing Area (mm²) |
|
6 inch |
152.4 |
82.6 |
19 |
162 |
52.3 |
16.8 |
11850 |
|
8 inch |
203.2 |
109.5 |
25.4 |
212.7 |
68.3 |
23.9 |
21068 |
|
9 inch |
228.1 |
124 |
28.6 |
238.1 |
76.2 |
23.9 |
26664 |
|
10.5 inch |
266.7 |
144.5 |
31.8 |
279.4 |
85.9 |
28.5 |
36293 |
|
12 inch |
304.8 |
165.1 |
35 |
317.5 |
95.3 |
30.2 |
47403 |
Note: All dimensions in mm unless otherwise specified. The sizes listed (e.g., 6 inch) represent the standard nominal shaft size class. Precision dimensions are available in both metric and imperial configurations per your design.
Material Specifications (ASTM B23)
We strictly source high-purity alloys to ensure optimal thermal conductivity and fatigue strength.
|
Alloy Grade (ASTM B23) |
Base |
Main Composition (%) |
Max Operating Temp |
Key Characteristic / Best For |
|
Grade 2 |
Tin (Sn) |
89% Sn, 7.5% Sb, 3.5% Cu |
150°C |
High-speed turbo machinery, excellent fatigue resistance |
|
Grade 3 |
Tin (Sn) |
84% Sn, 8% Sb, 8% Cu |
150°C |
Heavy-load thrust applications |
|
Grade 7 |
Lead (Pb) |
75% Pb, 10% Sn, 15% Sb |
120°C |
Reciprocating loads, high embeddability, cost-effective |
Note: Our alloy formulations strictly comply with ASTM B23 standards and can be cross-referenced to equivalent global grades upon request, including ISO 4381 (e.g., SnSb8Cu4), DIN 1703 (e.g., LgSn80), and JIS H5401.
To meet diverse structural and thermal requirements, we offer Babbitt lining bonded onto various backing substrates:
Carbon Steel (e.g., AISI 1020/1045) – Standard for most industrial motor and pump applications.
Cast Iron / Ductile Iron – Cost-effective for heavy, low-speed machinery.
Bronze / Brass Alloys – Provides secondary emergency running properties if the Babbitt layer wears through.
Stainless Steel / Low-Alloy Steel – For specialized corrosive or high-strength applications.
All backing structures undergo precision micro-grooving or dovetail machining to geometrically mechanical-lock the Babbitt lining, prior to centrifugal casting.
Custom Babbitt Bearings & Fluid Film Bearing Solutions
We manufacture a comprehensive range of fluid film bearings tailored to your exact geometric specifications.
Tilting Pad Journal Bearings
• Features: Self-adjusting pads eliminate oil whirl and whip, ensuring maximum hydrodynamic stability.
• Best For: Steam/Gas Turbines, Turbo-compressors, High-speed Generators.
Fixed Profile Journal Bearings (Sleeve / Bushing)
• Features: Engineered for medium-to-low speeds with heavy radial loads. Available in cylindrical, two-lobe, or lemon-bore configurations.
• Best For: Industrial Pumps, Electric Motors, Fans, Heavy-duty Gearboxes.
Babbitt Thrust Bearings (Fixed & Tilting Pad)
• Features: Engineered to handle severe axial loads while maintaining a stable lubricant film.
• Best For: Hydro Turbines, Marine Propulsion, Centrifugal Compressors.
Custom Babbitt Liners & Bearing Refurbishment
Features: Precision manufacturing of custom bearing shells and full-service rebabbitting/refurbishing to restore worn bearings to original OEM tolerances.
Why Global OEMs & Operators Choose ZB Bearings
Molecular-Level Bonding (Zero Delamination)
Our Solution: Advanced Centrifugal Casting Processes paired with strict chemical pre-treatment ensure a flawless, molecular-level bond between the Babbitt alloy and backing metal, eliminating subsurface gas pockets or slag.
Premium Alloys & Full Traceability
Our Solution: We strictly source high-purity alloys complying with ASTM B23 (e.g., Grade 2 tin-based Babbitt). Every batch is shipped with a Material Test Report (MTR).
Micron-Level CNC Precision
Our Solution: Equipped with state-of-the-art CNC machining centers, we control wall thickness, concentricity, and clearance tolerances within strict microns to match your PDF/STEP drawings.
Emergency Response & Minimal Downtime
Our Solution: We provide 24/7 support for critical plant shutdowns, rushing urgent re-babbitting and reverse-engineering services within 48–72 hours to restore your operations.
Engineering & Hydrodynamic Simulation
Predictive Design: Preventing Failures Before Production
We don't just manufacture; we optimize. Utilizing advanced Fluid Film Hydrodynamic Simulation Software, our engineering team analyzes bearing performance under your exact operating conditions to mitigate design risks and prevent premature wear.
What We Simulate & Verify:
• Minimum Film Thickness: Guarantees a continuous hydrodynamic lift to prevent metal-to-metal contact.
• Pressure & Thermal Profiling: Maps peak loads and oil temperatures to control cavitation and avoid thermal degradation.
• Rotor Dynamics: Optimizes stiffness and damping coefficients to stabilize shaft vibration, stopping oil whirl and whip before they start.
Typical Bearing Failures & Our Engineering Solutions
• Babbitt Fatigue & Cracking: Driven by cyclic dynamic loads. Our Solution: We optimize the whitemetal layer thickness (thin-shell design) to drastically increase fatigue life.
• Electrical Discharge Pitting: Caused by stray shaft currents. Our Solution: Complete insulated bearing shell designs or integrated grounding provisions.
• Cavitation Erosion: Occurs during rapid oil film pressure drops. Our Solution: Optimized geometry and precision-machined oil inlet pockets to smooth out pressure profiles.
Core Industry Alignment
• Power Generation: Hydro/steam turbines and utility-scale generators.
• Oil & Gas / Petrochemical: High-speed turbo-compressors and pipeline pumps conforming to API 612 & API 617 standards.
• Marine Propulsion: Heavy-duty thrust pads and stern tube bearings.
• Heavy Industry: Large-diameter sleeve bearings for mining ball mills and steel gearboxes.
Strict Quality Assurance & NDT Testing
• ISO 9001:2015 Certified: Our quality management system covers the entire lifecycle—from raw material inspection (IQC) to final dimensional verification.
• Continuous R&D: As an innovative bearing manufacturer, we continuously invest in metallurgy and fluid film hydrodynamic simulation to optimize bearing life.
Non-Destructive Testing (NDT):
• Ultrasonic Testing (UT): Performed in strict compliance with ISO 4386-1 or ASTM E114, verifying a Babbitt bonding rate of >95% (typically 99-100% in critical load zones).
• Dye Penetrant Testing (PT): Inspects for surface porosity or micro-cracks post-machining.
State-of-the-Art Production & Testing Capability
Centrifugal Casting Machines
Ensures porosity-free Babbitt layer alignment and high-density microstructure.
Multi-Axis CNC Turning & Milling Centers
Guarantees micron-level clearance control for multi-lobe and lemon-bore profiles.
In-House Spectroscopy
Verifies chemical composition (Sn, Sb, Cu, Pb) of every alloy melt batch before pouring.
Ultrasonic (UT) Testing Station
Dedicated NDT area for 100% bonding verification.
Frequently Asked Questions
We are one of the most professional babbitt bearings manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy customized babbitt bearings at competitive price from our factory. If you have any enquiry about free sample, please feel free to email us.