F-205156.5 Hydraulic Pump Bearing Cylindrical Roller Bearing Width 18mm

1. Product Overview

F-205156.5 is segmented crescent half-moon split needle roller bearing, matched to Rexroth A4VG series variable displacement plunger hydraulic pumps for excavators, loaders and construction machinery. It adopts split arc outer race + integrated stamped steel needle retainer structure, the curved outer ring perfectly fits swash plate inner curved cavity of engineering hydraulic pumps

All needle rollers, segmented outer race and retainer are manufactured with fully quenched GCr15 bearing steel with ultra-precision mirror grinding rolling surface. Evenly distributed needle rollers bear high-frequency alternating hydraulic impact load, effectively reduce friction heat, surface peeling and premature failure during long-time full-pressure pump operation. Compact split structure enables quick disassembly without removing the whole pump core, largely cutting equipment maintenance downtime. Widely used for main hydraulic pumps of excavators, loaders, bulldozers and heavy-duty industrial high-pressure hydraulic motors.

2. Technical Specifications

Complete pump matching installation drawings, swash plate assembly disassembly manual and long-cycle high-pressure impact durability test reports can be provided on customer demand.

3. Core Advantages

• Exclusive segmented half-moon arc outline, precise matching Rexroth A4VG pump swash plate curved support position, direct aftermarket replacement without pump body modification.
• Integrated steel retainer firmly locks cylindrical needles, prevent needle displacement and scattering under continuous high-pressure reciprocating impact load.
• Mirror superfinished rolling contact surface with low friction coefficient, effectively control temperature rise inside pump body under long-term full-load continuous operation.
• Overall quenching heat treatment reaches HRC60-65 high hardness, excellent anti-fatigue and wear resistance, extend hydraulic pump overhaul cycle significantly.
• Lightweight split embedded design, convenient assembly and quick disassembly during pump core maintenance, greatly improve after-sales maintenance efficiency.
• High structural rigidity, no race crack, deformation or peeling under long-time alternating hydraulic impact pressure.
• Universal interchangeable installation dimension, fully compatible with original F series hydraulic pump bearings for mainstream construction machinery plunger pumps.
• Comprehensive customized service: stainless steel anti-rust material, OEM laser marking on arc race surface, neutral export carton anti-rust packaging, high temperature resistant hydraulic oil surface treatment.

4. Application Scenarios

F-205156.5 split crescent needle roller bearing is core wear-resistant heavy-load spare part for construction machinery hydraulic equipment:

• Rexroth A4VG series excavator main variable plunger hydraulic pump swash plate curved support bearing assemblies
• Loader, bulldozer heavy-duty plunger hydraulic pump internal segmented rolling matching units
• Medium and large engineering machinery high-pressure hydraulic motor, rotary pump core transmission components
• Heavy industrial hydraulic station variable pump, high-pressure oil pump wear-resistant support positions
• Aftermarket interchangeable F series half-moon split hydraulic pump needle roller bearing
• Cost-effective anti-impact high-pressure bearing solution for construction machinery maintenance factories and hydraulic pump OEM mass procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of construction machinery Rexroth hydraulic pump special segmented crescent needle roller bearings including F-205156.5
• F-205156.5 fully dimensionally interchangeable with original hydraulic pump matching bearings, consistent impact resistance, pressure wear resistance and assembly tolerance standards.
• Complete OEM & ODM customization service supporting C3 clearance upgrade, stainless steel anti-corrosion material and custom surface laser marking.
• Strict full pre-delivery inspection procedures: GCr15 raw material hardness test, needle roller dimensional sorting screening, long-cycle high-pressure impact aging test, reciprocating friction fatigue wear test.
• Professional hydraulic pump bearing engineering team provides one-on-one pump model matching, hydraulic oil selection and swash plate assembly installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive factory bulk wholesale price for long-term construction machinery spare parts suppliers, hydraulic pump manufacturers and maintenance service factories.
• We focus on segmented crescent split roller structure, high-pressure anti-impact wear-resistant design, pump universal interchangeable layout and long-term win-win cooperation with global engineering machinery hydraulic transmission spare parts buyers.

6. Quality Control

• Raw material chemical composition and hardness inspection for GCr15 bearing steel crescent race, needle roller and retainer blanks
• Precision forging, quenching & tempering, ultra-mirror arc rolling surface finish grinding processing for split outer race
• Cylindrical needle roller high-temperature quenching, superfinishing and automatic dimensional sorting production line
• Integrated steel retainer stamping forming and automatic needle assembly process, strictly control internal needle running clearance
• Classified targeted performance testing: F-205156.5 long-cycle high-pressure alternating impact aging test, repeated swash plate reciprocating friction fatigue test, high-temperature hydraulic oil corrosion wear detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment
• Each production batch of F-205156.5 bearings passes full sampling hydraulic pump simulation rotation test to ensure stable long-term heavy impact wear-resistant support performance in engineering machinery variable plunger hydraulic pumps.

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