GQZ SB75A Metric Radial Spherical Plain Bearing 75×120×64mm Grease Fitted Steel-on-Steel Bushing For Heavy Duty Swing Joints

SB75A is heavy-duty radial spherical plain bearing of SB-A series, constructed with inner ring and outer ring adopting steel-on-steel friction pair, equipped with built-in grease fitting for regular supplementary lubrication. Its spherical contact surface allows maximum 5° self-aligning tilt angle, capable of enduring large radial load plus bidirectional axial load, perfectly matching swing, oscillating and misaligned transmission joints of heavy machinery.

Formal quotation will be sent within 24 hours upon your inquiry.

Complete dimension drawings and load data available on request.

1. Steel-on-steel contact structure delivers ultra-high static & dynamic load capacity for heavy-load swing working conditions
2. Spherical sliding surface realizes 5° self-alignment, compensates installation deviation and shaft deflection automatically
3. Reserved grease injection hole facilitates regular lubrication to reduce friction and extend service life
4. Separable inner and outer ring allows independent interference fit on shaft and housing, convenient disassembly and maintenance
5. Compact integral structure saves installation space compared with rod end bearing assemblies
6. Standard metric ISO dimension, fully interchangeable with same-spec spherical plain bearings
7. Customizable options: double side rubber seals, anti-corrosion surface coating, OEM laser marking, high-temperature lubricant
   Effectively reduce swing friction noise, prevent metal seizure and lower long-term equipment maintenance cost.

• Hydraulic cylinders, valve swing joints and hydraulic actuators
• Construction machinery, excavator, loader arm pivot connection parts
• Agricultural machinery heavy-duty oscillating transmission assemblies
• Large conveyor swing supports and automation rotary fixtures
• Mining equipment, engineering vehicle suspension and linkage joints
• General heavy machinery with frequent oscillating & misaligned movement

• 25 years professional manufacturer of spherical plain bearings and rod end bearings
• Products exported to over 50 countries worldwide
• Strict inspection on hardness, spherical surface finish, load capacity and tilt flexibility before shipment
• 24-hour professional technical support for bearing matching and installation guidance
• Sufficient bulk stock for hydraulic, construction and engineering machinery distributors
• We supply stable dimensional accuracy, reliable heavy-load swing performance and long-term cooperative support.

• GCr15 raw material chemical composition and hardness inspection
• Precision internal & external spherical surface superfinishing grinding
• Molybdenum disulfide solid lubricant coating treatment
• Lubrication hole processing and deburring
• Full dimension tolerance, load bearing and swing flexibility test

If you need SB75A steel-on-steel spherical plain bearings:

Send inquiry to obtain below supports:

• Quick formal quotation within 24 hours
• Professional installation interference fit suggestion
• Custom sealed structure and high-temperature lubrication solutions
• Competitive factory direct price
  Contact our sales team for full technical datasheets and formal offer.