High Precision RPNA45/62 Aligning Needle Roller Bearing 45x62x20mm

1. Product Overview

RPNA45/62 belongs to RPNA series radial split adjustable eccentric needle roller bearing, supplied with matched quenched solid integral inner ring, standard unified dimensions bore d=45mm, outer diameter D=62mm, overall width B=20mm. It adopts split outer ring self-aligning adjustable structure, supporting fine tuning of installation center distance to compensate static machining and assembly deviation between shaft and housing holes, avoiding stuck rotation and premature wear caused by misalignment.

This fully pre-assembled bearing unit consists of precision cylindrical needle rollers, stamped steel cage and heat-treated integrated inner ring. The split outer ring reserves compression clearance, and the eccentric position can be firmly locked by bolt tightening after positioning. All rings and needle rollers adopt fully quenched GCr15 bearing steel with ultra-precision mirror grinding. Needle rollers undergo strict dimensional sorting to guarantee uniform tolerance, realizing stable low-noise continuous rotation under heavy alternating radial load. Widely used for large printing machine heavy tension rollers, high-speed packaging film unwinding shafts, heavy-duty material conveyor main support rollers and large textile rotary positioning transmission assemblies.

2. Technical Specifications

Model: RPNA45/62
Basic dimension: d=45mm, D=62mm, B=20mm
Inner ring raceway diameter F=45mm, housing shoulder limit D1=58mm
Structure: Split adjustable eccentric needle roller bearing, complete integral inner ring, stamped steel retainer
Raw material: GCr15 high carbon chromium bearing steel for rings and needle rollers
Standard radial clearance: CN normal clearance, C3 enlarged clearance customizable
Adjustment parameter: ±0.45mm center distance fine-tuning range, maximum allowable axial offset 0.7mm
Minimum shaft fillet radius r=0.8mm, inner ring fillet r1=0.4mm
Operating temperature range: -30℃ ~ 120℃
Single piece net weight: 0.176kg
Basic dynamic radial load Cr: 27.5kN
Basic static radial load C0r: 57.0kN
Grease limiting rotation speed: 3600 r/min
Complete installation drawings, eccentric adjustment operation manual and long-cycle rotation durability test reports can be provided upon customer request.

3. Core Advantages

• Split adjustable outer ring self-aligning dual design, effectively eliminate shaft and housing assembly offset error, greatly reduce equipment assembly reject rate and early bearing failure rate.
• Standard equipped fully heat-treated integral inner ring, no extra hardening and grinding processing needed for matching shaft, simplify spare part machining and shorten production assembly cycle.
• Ultra-compact thin radial cross-section layout, occupy minimum radial installation space, perfect matching component for narrow roller support structure of heavy printing and packaging machinery.
• Mirror superfinished needle rollers with strict diameter sorting, evenly distributed load on each roller, low operating noise and tiny temperature rise during long-term medium-heavy speed continuous operation.
• Split outer ring with reserved compression gap, locked eccentric positioning reliably after bolt tightening, no position shifting under long-time heavy load equipment operation.
• Full one-stop customization service: C3 enlarged radial clearance, P6 high precision grade, OEM laser marking on outer ring, neutral export carton anti-rust packaging.
• Integral pre-assembled bearing unit, stamped steel cage tightly fix needle rollers to prevent roller scattering during disassembly, maintenance and replacement.
• Outer ring surface passivation anti-corrosion treatment, stable rust-proof performance for indoor light dust, normal humidity industrial working environments.

4. Application Scenarios

RPNA45/62 split adjustable eccentric needle roller bearing is core heavy-load adjustable support spare part for heavy light industrial transmission equipment:

• Large printing machinery heavy paper feeding roller, high tension roller rotary bearing assemblies
• Automatic heavy packaging equipment large film unwinding roller transmission positioning units
• Heavy bulk material conveying equipment main drive roller support bearing positions
• Large textile spinning auxiliary heavy transmission shafts, industrial small rotary joint assemblies

Aftermarket interchangeable 45mm bore RPNA series self-aligning eccentric needle roller bearing
Cost-effective heavy-load misalignment compensation needle bearing solution for printing machine OEM, large packaging equipment manufacturers and heavy industrial conveyor machinery bulk matching.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience for full RPNA series split adjustable eccentric needle roller bearings including RPNA45/62
• RPNA45/62 fully dimensionally interchangeable with international standard RPNA series adjustable needle bearings, consistent adjustment range, load rating and assembly tolerance indicators.
• Complete OEM & ODM customization service supporting C3 clearance upgrade, high precision grade and special surface anti-rust treatment.
• Strict full pre-delivery inspection items: GCr15 ring hardness test, needle roller dimensional sorting inspection, split ring repeated adjustment fatigue test, medium-speed long-cycle rotation aging test.
• Professional needle bearing engineering team provides one-on-one eccentric fine-tuning and shaft-housing matching installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive bulk wholesale factory price for long-term printing equipment factories, packaging machinery suppliers and heavy conveyor equipment manufacturers.

We focus on split adjustable self-aligning structure, integrated inner ring all-in-one unit, compact space-saving layout and long-term win-win cooperation with global industrial transmission spare parts buyers.

6. Quality Control

• Raw material chemical composition and hardness inspection of GCr15 bearing steel inner ring and split outer ring
• Precision stamping, cutting, quenching tempering and finish mirror grinding processing for split outer ring and solid inner ring
• Needle roller precision cutting, hardening and ultra-superfinishing, automatic dimensional sorting screening production line
• Stamped steel cage integrated forming and automatic roller assembly procedure to evenly control internal roller clearance
• Classified targeted performance testing: RPNA45/62 long-cycle medium-heavy load rotation aging test, repeated eccentric adjustment fatigue test, radial combined load deformation detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment

Each production batch of RPNA45/62 bearings passes full sampling radial reciprocating rotation load test to guarantee stable long-term self-aligning heavy-load support performance inside printing, packaging and heavy industrial conveyor transmission equipment.

7. Get A Quote Now

If you need self-aligning split adjustable RPNA45/62 needle roller bearings with integral inner ring for large printing, heavy packaging and industrial heavy conveyor machinery maintenance & OEM bulk matching, send your purchase inquiry directly.
You will receive complete professional supporting services after submitting your inquiry:

• Fast official factory formal quotation reply within 24 hours
• One-on-one eccentric adjustment operation & shaft housing matching installation technical guidance from professional RPNA series needle bearing engineers
• Customized bearing performance scheme suggestions including C3 enlarged clearance upgrade options
• Competitive direct factory bulk wholesale price for large quantity spare parts orders

Send your required purchase quantity and equipment medium-heavy load light dust working environment to obtain detailed sealed formal quotation document.

8. FAQ

1. Q1: What is the core structural feature of RPNA45/62 bearing?
   A1: It adopts split outer ring adjustable eccentric self-aligning structure with complete integrated quenched inner ring, which can fine-tune installation center distance to compensate static assembly misalignment of shaft and housing holes.
2. Q2: Do I need to purchase a separate inner ring for RPNA45/62?
   A2: No, this bearing is pre-equipped with matched quenched integral inner ring, can be directly installed on standard ground shaft without additional heat treatment and grinding processing.
3. Q3: What types of equipment is RPNA45/62 widely used for?
   A3: Mainly matched with heavy tension rollers of large printing machines, large unwinding rollers of heavy packaging equipment, main support rollers of heavy industrial conveyors and heavy auxiliary transmission shafts of textile machinery.