GQZ RNA6910 Double Row Machined Needle Roller Bearing 58×72×40mm Without Inner Ring For Compact Transmission Equipment

RNA6910 is double row machined ring needle roller bearing without inner ring, integrated with flanged outer ring, needle rollers and steel cage as one inseparable unit. It features ultra-small cross-section, ultra-high radial load capacity and high rigidity. This model directly uses hardened & ground shaft surface as rolling raceway to save assembly space, suitable for compact mechanical structures with heavy radial load.

Get formal quotation within 24 hours after sending your inquiry.

Model: RNA6910

Dimensions: Fw 58 mm, Outer D 72 mm, Width B 40 mm

Net weight: 0.31 kg

Dynamic load rating Cr: 82.0 kN

Static load rating Cor: 139 kN

Limiting speed: Grease lubrication 8000 rpm, Oil lubrication 10000 rpm

Structure: Double row needle rollers, no inner ring, flanged outer ring with lubrication groove

Cage: Cold stamped steel cage

Material: GCr15 chrome bearing steel

Standard clearance: C0 normal clearance; C3 enlarged clearance optional

Matching inner ring model: IR50×58×40 / LRT505840

Complete load parameters and CAD drawings available upon request.

1. Double row needle roller design provides much higher radial load capacity & rigidity than single row needle bearings
2. Without inner ring structure greatly reduces radial space occupation, realizing more compact mechanical layout
3. Integral flanged outer ring guides cage stably and reserves oil groove for convenient supplementary lubrication
4. Outer ring high rigidity, can be installed directly in light alloy housings without deformation
5. Tolerates small bidirectional axial displacement between shaft and housing during operation
6. Standard metric size, fully interchangeable with mainstream same-size needle roller bearings
7. Customizable options: rubber seals (UU/2RS), high-temperature grease, OEM laser marking, P6/P5/P4 precision grade
   Effectively reduce equipment wear, vibration and maintenance frequency under heavy load conditions.

• Industrial gearboxes, reduction drives and transmission boxes
• Hydraulic pumps, hydraulic cylinders and valve actuators
• Automation equipment, robotic joint rotary structures
• Construction machinery, agricultural machinery moving shafts
• Textile printing, packaging heavy-duty rotary assemblies
• General compact heavy radial load mechanical components

• 25 years specialized manufacturer of machined needle roller bearings
• Products exported to more than 50 countries worldwide
• Strict tests on hardness, roundness, load capacity and rotational smoothness before delivery
• 24-hour professional technical support for bearing set matching and installation guidance
• Sufficient bulk stock for gearbox, hydraulic and automation machinery distributors
• We supply stable quality, reliable heavy-load performance and long-term partnership support.

• GCr15 raw material metallurgy and hardness inspection
• Complete quenching & tempering heat stabilization treatment
• Precision superfinishing grinding for outer ring raceway and flange
• Roller dimensional sorting and cage assembly tightness test
• Full dimensional tolerance, load and speed performance inspection

If you need RNA6910 double row needle roller bearings without inner ring:

Send your inquiry to obtain:

• Fast formal quotation within 24 hours
• Matching inner ring selection suggestion
• Sealed version & high-load lubricant customized solutions
• Competitive factory direct price
  Contact our sales team for full technical datasheets and formal offer.