GQZ 390A/394A Separable Inch Single Tapered Roller Bearing, Cone & Cup Assembly Bearing For Heavy Truck And Trailer Wheel Hub Axles

The 390A/394A inch single tapered roller bearing consists of separable cone (390A) and cup (394A), designed for heavy truck, trailer wheel hubs and construction transmission axles.

It bears combined radial & unidirectional axial loads under heavy impact and long-distance continuous running.

• Separable cone & cup design simplifies installation, disassembly and clearance adjustment
• Optimized tapered roller profile withstands heavy radial and single-direction axial loads
• High dynamic & static load rating resists vehicle impact and overload road conditions
• Standard inch dimension fully interchangeable with Timken, NSK original counterparts
• Custom precision grade, special anti-wear grease and OEM marking service available

This bearing set is widely used in:

• Heavy-duty truck wheel hub assemblies
• Trailer tandem axle transmission parts
• Agricultural tractor axle hubs
• Light construction machinery gearboxes
• Mining small transport vehicle wheel ends

• 25+ years experience in industrial tapered roller bearing manufacturing
• Exported to 50+ countries worldwide
• Rich experience in OEM inch cone & cup bearing customization
• Strict load capacity & dimensional inspection before shipment
• Fast response within 24 hours
• Stable bulk supply for vehicle parts distributors

• GCr15 steel raw material hardness & metallurgy inspection
• Precision tapered raceway grinding process
• Heat treatment hardness stabilization test
• Roller contact surface & rotation noise testing
• Final full dimension and assembly matching inspection before delivery

Looking for interchangeable inch tapered roller bearing sets for truck hubs?

• Fast quotation within 24 hours
• Technical support from engineers
• Custom solution suggestions
• Competitive factory price