3994/3920 Tapered Roller Bearing 63.5x112.712x30.16mm Single Row Cone and Cup Assembly

1. Product Overview

3994/3920 is single‑row inch‑size tapered roller bearing assembly, composed of separable cone (inner ring with rollers & cage) and cup (outer ring). Dimensions: 63.5 mm inner bore × 112.712 mm outer diameter × 30.16 mm total width.
This bearing can bear combined heavy radial load and one‑direction axial thrust load. Separate design allows mounting preload adjustment during assembly. Precision machined tapered raceway and rollers ensure even stress distribution. Adopt high‑quality GCr15 bearing steel for all rolling components. Widely used for truck axle hubs, heavy trailer wheels, construction machinery, agricultural heavy‑duty equipment and reducer units requiring combined radial‑axial load capacity.

2. Technical Specifications

Model: 3994/3920
Inner bore d: 63.5 mm
Outer diameter D: 112.712 mm
Total width T: 30.16 mm
Cup width C: 23.012 mm
Cone width B: 29.315 mm
Basic dynamic radial load Cr: 146 kN
Basic static radial load C0r: 178 kN
Limiting speed (grease lubrication): 3400 r/min
Single set net weight: 1.42 kg
Structure: Single‑row tapered roller, separable cone & cup
Cage: Stamped steel cage
Material: GCr15 bearing steel, hardness HRC60‑65
Operating temperature range: ‑20℃ ~ 120℃
Mounting shoulder dimension drawing, preload adjustment guide and performance test reports can be provided upon customer request.

3. Core Advantages

• Separable cone‑cup construction, convenient installation, disassembly and pre‑load adjustment to meet different equipment clearance requirements.
• Excellent combined load capacity: withstand heavy radial load plus large unidirectional axial thrust load, ideal for wheel‑hub and heavy transmission positions.
• Precision tapered raceway and roller surface grinding, uniform contact stress, low running noise and stable performance under shock and intermittent impact load.
• GCr15 fully quenched bearing steel, good wear‑resistance and contact‑fatigue performance, long service‑life for heavy‑duty cyclic working conditions.
• Stamped steel cage with stable rigidity, keeps tapered rollers in correct position, reduces roller skew during high‑impact operation.
• Standard inch series interchangeable dimension, fully interchangeable with global 3994/3920 tapered roller bearing sets, direct replacement without housing modification.
• Strictly controlled taper angle tolerance, consistent contact pattern after mounting, avoid local over‑heating and premature wear.
• Rich custom options: P0/P6 precision grade, special anti‑corrosion coating, OEM laser marking on cone/cup, neutral export anti‑rust carton, special high‑temperature grease filling.

4. Application Scenarios

3994/3920 inch‑size single‑row tapered roller bearing set is heavy‑duty separable rotary spare‑part for equipment with 63.5 mm shaft requiring combined radial‑axial load support:

• Light‑medium truck and heavy‑trailer wheel hub bearing assemblies
• Construction machinery axle, heavy off‑road equipment rotary support positions
• Large agricultural machinery, harvester heavy transmission and wheel hubs
• Heavy‑duty gear reducer, mining machinery intermediate shaft supporting units
• General heavy‑duty industrial equipment with unidirectional axial thrust load

Aftermarket interchangeable inch‑series 3994/3920 tapered roller bearing
Heavy‑load impact‑resistant bearing solution for truck parts manufacturers, construction & agricultural machinery OEMs and equipment maintenance bulk‑procurement.

5. Why Choose GQZ Bearing

• 25‑years manufacturing experience of inch‑size single‑row tapered roller bearings including 3994/3920.
• 3994/3920 full‑set dimensionally interchangeable with international‑standard counterparts, consistent dynamic/static load rating, taper angle and dimensional tolerance standards.
• Complete OEM & ODM custom service covering multi‑precision‑grade, surface anti‑corrosion treatment and special‑temperature‑resistant grease filling.
• Strict pre‑shipment QC: GCr15 raw‑material metallurgy & hardness inspection, roller sorting screening, long‑cycle impact rotation aging test, contact‑pattern inspection after assembly.
• Professional tapered‑roller‑bearing engineering team provides one‑on‑one combined‑load calculation, pre‑load adjustment guidance and installation torque tips within 24 working hours.
• Large‑scale production workshop offers competitive factory‑direct bulk‑wholesale price, stable long‑term supply for global truck, construction and agricultural machinery spare‑part buyers.

We specialize in inch‑series separable tapered roller bearings, precise taper‑angle control, universal interchangeable dimensions, pursuing win‑win long‑term cooperation with heavy‑duty vehicle and transmission‑equipment suppliers.

6. Quality Control

• Raw‑material chemical‑composition, internal‑defect and hardness inspection for GCr15 cone, cup and tapered roller blanks
• Precision turning, multiple stress‑relief tempering, ultra‑precision grinding for tapered raceway and roller surfaces
• Tapered roller high‑temperature quenching, mirror‑polishing and high‑precision auto‑sorting production‑line
• Stamped‑steel cage stamping & riveting, cone‑cup matching inspection, contact‑pattern checking assembly process
• Targeted performance‑tests: 3994/3920 long‑cycle heavy‑impact rotation aging test, combined radial‑axial load fatigue wear‑detection
• Full re‑check for dimension‑tolerance, taper‑angle, surface‑finish before anti‑rust‑oil coating and export moisture‑proof‑carton packing.

Each production batch of 3994/3920 undergoes wheel‑hub simulation cyclic‑rotation test to guarantee stable heavy‑load anti‑impact rotary‑support performance for heavy‑duty axle systems.

7. Get A Quote Now

If you need 3994/3920 inch‑size tapered roller bearing sets for truck/trailer axle manufacturing, heavy‑equipment‑assembly and machinery‑maintenance bulk‑matching, send your purchase‑inquiry directly.
Full professional supporting‑services after inquiry submission:

• Official formal quotation reply within 24 working‑hours
• One‑on‑one radial‑&‑axial‑combined‑load calculation, pre‑load adjustment and installation technical‑support from professional‑bearing‑engineers
• Custom‑bearing‑performance‑upgrade options including multi‑precision‑grade and special‑temperature‑resistant‑grease
• Favorable factory‑direct bulk‑wholesale price for large‑volume 3994/3920 single‑model‑orders

Please provide purchase‑quantity, working‑conditions (heavy impact / vibration / operating temperature) to get detailed official‑quotation‑documents.

8. FAQ