GQZ NU312 Single Row Open Cylindrical Roller Bearing 60×130×31mm Floating Design With Bidirectional Axial Slide

NU312 is single row cylindrical roller bearing with double ribs on outer ring and ribless inner ring. This floating construction permits limited bidirectional axial displacement between shaft and housing. It delivers excellent heavy radial load capacity and operates reliably under continuous medium-high speed conditions. Open design supports convenient re-lubriion for long-cycle production machinery. Widely used on industrial gearboxes, screw air compressors, mining fans and heavy-duty transmission assemblies.

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

Model:

NU312

Dimensions:

d60 mm, D130 mm, B31 mm

Net weight:

approx 1.80 kg

Structure:

Single row cylindrical roller bearing

Material:

GCr15 bearing steel; pressed steel or machined brass cage optional

Structural feature:

Floating unit, inner ring separable for installation

Optional version:

NU312E reinforced upgraded structure available

Complete dimension drawings and load data available on request.

1. Floating structure compensates thermal expansion and axial shaft movement
2. High dynamic load rating adapts to continuous heavy-duty running
3. Separable inner ring simplifies assembly, inspection and replacement
4. Low friction raceway grinding reduces heat generation and vibration
5. Standard ISO metric dimension for global aftermarket interchange
6. Customizable: OEM laser marking, high-temperature special grease

• Screw air compressor rotor supporting assemblies
• Heavy-duty industrial gearboxes and reduction drive units
• Cement, mining and metallurgical main transmission shafts
• Large industrial blowers, fans and centrifugal machinery
• Equipment requiring floating bearing layout to release axial stress

• 25 years professional bearing manufacturer, products exported globally.
• Strict raw material inspection and precision grinding process.
• 24-hour technical support for model selection.
• Ample stock for machinery distributors.
• Precise dimensions and stable service performance.

• GCr15 raw material quenching & tempering treatment
• Precision superfinishing for bearing raceways and cylindrical rollers
• Cage fitting and internal clearance inspection
• Dimension tolerance and rotational performance testing

If you need NU312 cylindrical roller bearings:

Send inquiry to obtain below supports:

• Quick quotation within 24 hours
• Reinforced NU312E version consultation
• Competitive factory direct price
• Contact our sales team for full datasheets and formal offer.

Q1: Main dimensions of NU312?

60×130×31 mm single row cylindrical roller bearing.

Q2: Structural feature of NU type?

Outer ring double ribs, inner ring no ribs, allows bidirectional axial sliding.

Q3: Installation tip?

Suitable for positions where thermal elongation of shaft needs compensation.