GQZ NU312 single row cylindrical roller bearing with NU structure, outer ring double ribs, inner ring rib-free separable design, high load capacity for medium speed heavy load industrial equipment

NU312 is NU type single row cylindrical roller bearing. NU design 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. The roller assembly can be separated from outer ring, facilitating convenient installation, disassembly and maintenance. Widely applied in heavy-duty gearboxes, mining conveyors, metallurgical rolling equipment, water pumps and various medium-speed 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:

Single row cylindrical roller bearing, NU type

Material:

GCr15 bearing chrome steel, stamped steel cage

Clearance:

Standard CN clearance; C3 clearance optional

Optional variant:

solid machined cage available on request

Note:

Complete dimension drawings and load data available on request.

1. Robust roller layout delivers outstanding heavy radial load capacity and high rigidity
2. NU structural design permits relative axial sliding between inner and outer bearing rings
3. Separable roller assembly simplifies on-site inspection and component replacement
4. Low rolling friction, stable performance under continuous medium rotating speed
5. Good resistance to moderate alternating impact loads
6. Customizable options: OEM laser marking, anti-rust treatment, special clearance grades Reliable supporting solution for heavy-load power transmission machinery.

• Heavy-duty industrial gearboxes and large speed reducers
• Mining belt conveyor drive assemblies
• Metallurgical plant roller supporting shafts
• Large water pumps and compressor rotating parts
• Construction machinery and heavy vehicle transmission units
• Medium-speed rotary equipment enduring continuous heavy radial load

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 heavy industry machinery distributors

We supply stable dimensional accuracy, reliable heavy-load performance and long-term cooperative support.

GCr15 raw material chemical composition and hardness inspection

Complete quenching & tempering heat stabilization treatment

Precision superfinishing grinding for bearing rings and cylindrical rollers

Cage forming and deburring processing

Full dimension tolerance, clearance detection 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 application 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?

Primarily bears heavy radial load and allows limited axial displacement between rings.