Cylindrical Bearing RPNA20/35 Aligning Roller Bearing 20x35x16mm

1. Product Overview

1.Product Overview
RPNA20/35 is RPNA series radial split adjustable eccentric needle roller bearing with matched quenched integral inner ring, unified standard dimension inner bore d=20mm, outer diameter D=35mm, overall width B=16mm. It features split outer ring structure with self-aligning function, allowing fine adjustment of installation center distance to offset machining and assembly deviation between shaft and housing holes.

The complete pre-assembled unit consists of precision cylindrical needle rollers, stamped steel cage and solid heat-treated inner ring. Split outer ring reserves tightening clearance, the eccentric position can be locked firmly after bolt compression positioning. All bearing rings and needle rollers are made of full quenched GCr15 bearing steel with ultra-precision grinding. Needle rollers undergo strict dimensional sorting for consistent tolerance, achieving stable low-noise rotation under medium alternating radial load. Widely applied to printing machine tension rollers, packaging film unwinding shafts, light material conveyor support rollers and textile auxiliary rotary positioning assemblies.

2. Technical Specifications

Model: RPNA20/35
Basic dimension: d=20mm, D=35mm, B=16mm
Inner ring raceway diameter F=24mm, housing shoulder limit D1=30mm
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: ±0.3mm center distance fine-tuning range, max allowable axial offset 0.5mm
Minimum shaft fillet radius r=0.8mm, inner ring fillet r1=0.3mm
Operating temperature range: -30℃ ~ 120℃
Single piece net weight: 0.053kg
Basic dynamic radial load Cr: 14.6kN
Basic static radial load C0r: 19.2kN
Grease limiting rotation speed: 5200 r/min
Complete installation drawings, eccentric adjustment operation guide and long-cycle continuous rotation durability test reports can be provided upon customer request.

3. Core Advantages

• Split adjustable outer ring self-aligning design, effectively eliminate assembly misalignment error between shaft and housing, reduce equipment assembly reject rate.
• Standard equipped integrated heat-treated inner ring, no extra hardening and grinding required for matching shaft, simplify accessory processing and shorten assembly cycle.
• Ultra-compact thin radial wall layout, occupy minimal radial installation space, ideal matching component for narrow roller support structure of printing and packaging light machinery.
• Mirror superfinished needle rollers with strict diameter sorting, uniform stress distribution on each roller, low running noise and slight temperature rise during long medium-speed continuous operation.
• Split outer ring with compression gap, locked adjusted eccentric position by bolt tightening without displacement in long-term equipment operation.
• Full customizable service support: 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, steel cage firmly fix needle rollers to avoid roller scattering during disassembly and maintenance.
• Outer ring passivation anti-corrosion treatment, stable rust resistance for indoor light dust industrial working environment.

4. Application Scenarios

RPNA20/35 split adjustable eccentric needle roller bearing is core adjustable supporting spare part for light industrial transmission equipment:

• Printing machinery paper feeding roller, tension roller rotary support bearing assemblies
• Automatic packaging equipment film unwinding roller transmission positioning units
• Light weight material conveying equipment small roller support bearing positions
• Textile spinning auxiliary transmission shafts, small garden power equipment rotary joints

Aftermarket interchangeable 20mm bore RPNA series self-aligning eccentric needle roller bearing
Cost-effective misalignment compensation needle bearing solution for printing machine OEM, packaging equipment factories and light conveyor machinery bulk matching.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience for RPNA series split adjustable eccentric needle roller bearings including RPNA20/35
• RPNA20/35 fully dimensionally interchangeable with international standard RPNA series eccentric needle bearings, consistent adjust 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.
• Full strict pre-delivery inspection: GCr15 ring hardness test, needle roller dimensional sorting inspection, split ring repeated adjustment fatigue test, high-speed continuous rotation aging test.
• Professional needle bearing engineering team provides eccentric fine-tuning and shaft housing matching installation technical guidance within 24 hours.
• Stable mass production lines with favorable bulk wholesale prices for long-term printing equipment manufacturers, packaging machinery suppliers and light conveyor equipment factories.

We focus on split adjustable self-aligning design, integrated inner ring all-in-one structure, compact space-saving layout and long-term win-win cooperation with global light 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 grinding processing for split outer ring and solid inner ring
• Needle roller precision cutting, hardening and mirror superfinishing, automatic dimensional sorting screening process
• Stamped steel cage integrated forming and automatic roller assembly procedure to evenly control roller clearance
• Classified targeted performance testing: RPNA20/35 long-cycle medium-speed rotation aging test, repeated eccentric adjustment fatigue test, radial combined load deformation detection
• Full dimensional and surface defect recheck before anti-rust oil coating and carton packaging shipment

Each batch of RPNA20/35 bearings passes full sampling radial load reciprocating rotation test to guarantee stable long-term self-aligning support performance inside printing, packaging and light conveyor transmission equipment.

7. Get A Quote Now

If you need self-aligning split adjustable RPNA20/35 needle roller bearings with integral inner ring for printing, packaging and light conveyor machinery maintenance & OEM matching, send your inquiry directly.
You will receive complete professional supporting services after submitting your inquiry:
Fast official factory 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 scheme suggestions including C3 enlarged clearance upgrade options
Competitive direct factory bulk wholesale price for large spare parts bulk orders
Send your required purchase quantity and equipment medium-speed light dust working environment to obtain detailed formal quotation.

8. FAQ

1. Q1: What is the core structural feature of RPNA20/35 bearing?
   A1: It is split outer ring adjustable eccentric needle roller bearing with complete integral inner ring, can fine-tune installation center distance to compensate static assembly misalignment of shaft and housing.
2. Q2: Do I need separate inner ring for RPNA20/35?
   A2: No, this bearing is supplied with matched quenched integral inner ring, can be directly installed on standard ground shaft without extra heat treatment.
3. Q3: What equipment is RPNA20/35 mainly used for?
   A3: Widely applied to printing machine tension rollers, packaging unwinding rollers, light conveyor support rollers and textile auxiliary transmission shafts.