GQZ 30318-A Single Row Tapered Roller Bearing 90×190×43.5mm Separable Type For Heavy Load Transmission Shafts

30318-A is single row separable tapered roller bearing with optimized A-type internal geometry. Tapered contact surfaces between rollers and raceways can bear heavy radial load and unidirectional axial load simultaneously. Separable inner cone and outer cup simplify installation, disassembly and preload adjustment. It is suitable for heavy-duty transmission systems under impact vibration and mixed load working conditions.

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

Model: 30318-A

Dimensions: d90 mm, D190 mm, T43.5 mm

Net weight: approx 5.35 kg

Dynamic load rating Cr: 312 kN

Static load rating Cor: 398 kN

Limiting speed: Grease 2500 rpm, Oil 3300 rpm

Structure: Single row tapered rollers, A optimized internal design, separable inner cone & outer cup

Material: GCr15 bearing chrome steel, stamped steel cage

Clearance: Standard factory preset clearance, custom clearance available

Complete dimension drawings and load data available on request.

1. A optimized internal geometric structure improves contact matching, enhances load capacity and shock resistance
2. Tapered raceway structure bears radial force and one-way axial thrust load at the same time
3. Separable inner and outer components support independent fitting and flexible preload adjustment
4. Superfinished roller surface reduces friction heat and running noise during continuous operation
5. Standard metric dimensions, fully interchangeable with same specification tapered roller bearings
6. Customizable options: OEM laser marking, high temperature resistant grease, special clearance grades
   Effectively reduce roller fatigue wear and extend service life of heavy machinery transmission assemblies.

• Truck, bus drive axles, differential and vehicle gearbox assemblies
• Excavators, loaders and other construction machinery rotary transmission components
• Agricultural machinery gearboxes and power output drive shafts
• Heavy industrial reducers and large conveyor roller supporting structures
• Mining machinery and engineering vehicle wheel hub assemblies
• General mechanical equipment operating under heavy combined radial and axial loads

25 years professional manufacturer of tapered roller bearings

Products exported to over 50 countries worldwide

Strict inspection on raw material hardness, roller surface finish, load capacity and rotational smoothness before delivery

24-hour professional technical support for clearance selection and installation guidance

Sufficient bulk stock for automotive, engineering and 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

Superfinishing grinding for inner cone, outer cup and roller surfaces

Stamped cage forming and deburring treatment

Full dimension tolerance, static & dynamic load and rotational performance testing

If you need 30318-A tapered roller bearings:

Send inquiry to obtain below supports:

• Quick formal quotation within 24 hours
• Professional preload adjustment advice for various working scenarios
• Custom lubrication and marking solutions
• Competitive factory direct price
  Contact our sales team for full technical datasheets and formal offer.

8. FAQ

Q1: What does suffix A mean for 30318-A?

Suffix A represents optimized internal geometry design for better stress distribution and higher load capacity.

Q2: Main dimensions of 30318-A?

90×190×43.5 mm, single row heavy-duty tapered roller bearing.

Q3: What loads can this bearing bear?

It can withstand heavy radial load and one-way axial thrust load simultaneously.