WJ222820 Inch Radial Needle Roller Cage Assembly Open Type 34.925x44.45x31.75mm Farm Machinery Transmission Parts

The WJ222820 is an inch-size open needle roller cage assembly without outer shell, standard dimension 34.925×44.45×31.75mm. It adopts dense arranged needle rollers and integrated stamped steel cage, featuring ultra-compact radial cross-section and outstanding heavy radial load capacity. It requires matched hardened housing and quenched shaft as raceways, widely used in agricultural machinery, small gearboxes and compact inch transmission equipment.

• Open cage structure saves installation space, no integrated outer shell for compact mechanism design
• Dense needle roller layout provides large radial load capacity under narrow radial space
• Stamped steel cage locks rollers firmly, prevents roller falling during assembly and operation
• Standard inch imperial size fully interchangeable with global WJ series needle assemblies
• Works with quenched shaft and hardened housing to omit separate inner/outer bearing rings
• Custom width, clearance grades and surface anti-rust treatment available on demand

This inch needle roller cage assembly is widely matched to:

• Agricultural harvesters, farm rotary transmission and inch standard machinery
• Small industrial gearboxes, hydraulic components and textile equipment
• General compact rotary structures adopting imperial dimension design
• Equipment with limited radial installation space requiring heavy radial load support

• 25+ years experience in inch WJ series needle roller cage production
• Exported to 50+ countries worldwide
• Rich OEM experience for imperial needle roller assembly bulk orders
• Strict roller hardness, cage forming and dimensional tolerance inspection before shipment
• Fast professional technical reply within 24 hours
• Stable bulk supply for long-term agricultural machinery factory cooperation

• GCr15 bearing steel raw material incoming hardness inspection
• Precision cutting and stamping for steel cage, superfinishing for needle rollers
• Standard quenching & tempering heat treatment for uniform surface hardness
• Roller retention test, load durability and full dimension recheck
• Anti-rust oil treatment before tube packaging delivery

• Q1: Does WJ222820 need outer cup and inner ring?

  No, it is only roller cage assembly; quenched shaft acts inner race, hardened housing acts outer race.

• Q2: Can you supply sealed WJ series needle assemblies?

  WJ standard type is open; sealed drawn cup needle bearings can be customized separately.

• Q3: What is your standard production lead time?

  Stock WJ222820:7–12 working days

  Custom precision/surface treatment orders take 12–18 days

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