GQZ 7312B Angular Contact Ball Bearing 60×130×31mm For Medium-Heavy Duty Industrial Transmission Equipment

7312B is single row angular contact ball bearing. The suffix B stands for 40° contact angle. It can bear combined radial load and unidirectional axial load. Larger contact angle delivers superior axial bearing capability compared with A and C type versions. Bearings need to be installed in paired arrangement when bidirectional axial load exists. Widely used in industrial gearboxes, heavy-duty water pumps, air compressors, mining machinery and medium-heavy load rotary assemblies.

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

Model

7312B

Dimensions

d60 mm, D130 mm, B31 mm

Net weight

approx 1.74 kg

Dynamic load rating Cr

112 kN

Static load rating Cor

88.5 kN

Limiting speed

Grease 3600 rpm, Oil 4300 rpm

Structure

Single row angular contact ball bearing, 40° contact angle

Material

GCr15 bearing chrome steel, stamped steel cage

Clearance

Standard CN clearance; C3 clearance optional

Optional matching configuration

DB / DF / DT paired arrangement available

Complete dimension drawings and load data available on request.

1. 40° large contact angle provides excellent unidirectional axial load capacity
2. Able to withstand combined radial load and one-way axial load
3. Robust structural layout adapts medium and heavy-load working conditions
4. Can be combined back-to-back, face-to-face or tandem to meet different load demands
5. High rigidity and stable operation under light impact loads
6. Customizable options: OEM laser marking, solid machined cage, special high-temperature grease

Suitable for rotary equipment with prominent axial force.

• Heavy-duty industrial gearboxes and large reduction devices
• Centrifugal water pumps and screw air compressors
• Mining machinery and construction equipment transmission assemblies
• Metallurgical auxiliary equipment and fan supporting shafts
• General medium-speed rotary equipment subjected to obvious axial thrust
• Mechanical systems requiring paired angular contact bearing installation

• 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 pairing arrangement and installation 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 steel balls
• Geometry and contact angle detection
• Full dimension tolerance, clearance testing and rotational performance inspection

If you need 7312B angular contact ball bearings:

Send inquiry to obtain below supports:

• Quick formal quotation within 24 hours
• Professional pairing installation suggestion
• Solid cage alternative solutions
• Competitive factory direct price

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

Q1: What does B represent?

B = 40° contact angle.

Q2: Main dimensions of 7312B?

60×130×31 mm single row angular contact ball bearing.

Q3: Installation hint?

Single bearing only supports one-way axial load; use matched pairs for bidirectional axial force.