High-Performance C93200 (SAE 660) Leaded Tin Bronze Main Eccentric Bearings for Drilling Equipment

Overview

C93200 (SAE 660) leaded tin bronze main eccentric bearings are engineered for high-performance drilling equipment applications, offering excellent self-lubrication, wear resistance, and medium load capacity. These bearings are ideal for critical components such as vibrating shale shakers, mud pump crankshafts, turbine drill reducers, and downhole hydraulic pump drives, where operating conditions involve heavy vibration, impact loads, and limited lubrication.

• Material: C93200 (SAE 660) leaded tin bronze
• Hardness: HB 70–80 (stress-relieved annealing)
• Tensile Strength: 270–310 MPa
• Key Advantages: Self-lubricating, wear-resistant, embedded impurity tolerance, long service life in harsh environments

Application in Drilling Mud Shaker Exciters

The vibrating shale shaker is a primary solid control device that separates solids from drilling fluids. Its core component, the eccentric shaft, is supported by C93200 bearings.

Operating Conditions: High-speed rotation, periodic centrifugal force, heavy vibration, and intermittent lubrication.
Manufacturing Requirements:

• Defect-free casting (no shrinkage, cracks, sand holes)
• Surface roughness Ra 1.6–3.2 on critical surfaces
• Stress-relief annealing for HB 70–80 hardness

Application in Mud Pump Crankshaft Assemblies

Mud pumps convert rotational motion into piston reciprocation via crankshaft and connecting rod assemblies. The main eccentric bearings (big end or crankshaft bearings) are critical in transmitting high radial and axial loads.

Performance Data: Some diesel engine main bearings in 150°C oil ran 5000 hours with only 0.02 mm clearance change.

Application in Other Drilling Equipment

Manufacturing & Process Requirements

1. Casting/Forging: No shrinkage, cracks, or sand holes; proper metal flow orientation
2. Machining: Sharp edges chamfered C0.5, root cleaning, burr removal; critical surfaces Ra ≤ 1.6–3.2
3. Balancing: Static or dynamic balancing for high-speed components
4. Assembly: Match-mark paired components for precision fit
5. Inspection: Magnetic particle or ultrasonic testing for critical stress points; pressure or leak testing for sealed components
6. Heat Treatment: Stress-relief annealing, hardness HB 70–80
7. Other Requirements: Even lubrication application, part marking, anti-rust coating and protective packaging

Why Choose C93200 Bearings for Drilling Equipment

• Shale Shaker Exciters: Resist vibration and impact, reduce friction, and prolong shaft life
• Mud Pump Crankshafts: High-load capacity, excellent fatigue performance, embedded impurity tolerance
• Turbine Reducers & Steering Systems: Reliable in limited lubrication conditions, precise adjustment, long-term stability

Recommendation for Suppliers: Specify the application for main eccentric bearings in drilling equipment with high vibration, impact loads, and limited lubrication to ensure the material condition and heat treatment meet real operating requirements.