GQZ NU312 Single Row Cylindrical Roller Bearing 60×130×31mm For Heavy-Duty Gear Transmission Equipment

NU312 belongs to NU-type single row cylindrical roller bearing. The structure features double ribs on outer ring and rib-free inner ring, allowing limited axial displacement between inner and outer rings. It can sustain heavy radial loads only. The roller and inner ring assembly can be separated from outer ring, bringing convenience for assembly, disassembly and routine maintenance. Widely applied in heavy-duty gearboxes, large water pumps, compressors, mining conveyors and medium-heavy load rotating assemblies.

Formal quotation will be sent within 24 hours upon your inquiry.

Model:

NU312

Dimensions:

d60 mm, D130 mm, B31 mm

Net weight:

approx 2.12 kg

Dynamic load rating Cr:

242 kN

Static load rating Cor:

248 kN

Limiting speed:

Grease 3800 rpm, Oil 4600 rpm

Structure:

NU type single row cylindrical roller bearing

Material:

GCr15 bearing steel, stamped steel cage

Clearance:

Standard CN clearance; C3 clearance optional

Optional variant:

machined solid cage available on request

Complete dimension drawings and load data available on request.

1. Dense roller arrangement provides outstanding heavy radial load capacity and rigidity
2. NU structural design permits axial sliding between inner and outer rings
3. Separable components simplify on-site inspection and replacement
4. Low rolling friction, stable continuous medium-speed operation
5. Good resistance against light alternating impact loads
6. Customizable options: OEM laser marking, anti-rust treatment, high temperature grease

Reliable supporting solution for heavy-load power transmission machinery.

• Heavy-duty industrial gearboxes and large speed reducers
• Centrifugal water pumps and air compressor drive shafts
• Mining belt conveyors and metallurgical auxiliary equipment
• Construction machinery transmission assemblies
• Machine tool auxiliary rotary supporting structures
• Medium-speed rotary equipment without strict axial positioning requirement

• 25 years professional bearing manufacturer
• Products exported to over 50 countries worldwide
• Strict inspection on raw material hardness, surface finish, load capacity and rotational smoothness before delivery
• 24-hour professional technical support for installation and clearance selection guidance
• Sufficient bulk stock for machinery distributors
• We supply stable dimensional accuracy, reliable performance and long-term cooperative support.

• GCr15 raw material chemical composition and hardness inspection
• Complete quenching & tempering heat stabilization treatment
• Precision superfinishing grinding for raceways and cylindrical rollers
• Cage forming and deburring processing
• Full dimension tolerance, clearance testing and rotational performance testing

If you need NU312 cylindrical roller bearings:

Send inquiry to obtain below supports:

• Quick formal quotation within 24 hours
• Professional assembly and model matching suggestions
• Optional solid cage alternative solutions
• Competitive factory direct price

Contact our sales team for full technical datasheets and formal offer.

Q1: What does NU stand for?

NU = outer ring with two ribs, inner ring without ribs.

Q2: Main dimensions of NU312?

60×130×31 mm NU type cylindrical roller bearing.

Q3: Load characteristic?

Mainly bears radial load and allows relative axial sliding between rings.