6-7804Y Lada Tapered Roller Bearing | 19.05×45.25×15.494mm | VAZ 2101–2107 Front Wheel Hub Outer

Specifications

⚠️ Fitment note: The 6-7804Y is the outer (smaller bore) tapered roller bearing of the VAZ 2101–2107 front wheel hub assembly. It is paired with the inner bearing 6-7805Y (2101-3103020, 26×57.15×17.462mm). Both bearings must be replaced together for correct hub preload and service life.

Product Overview

The 6-7804Y is a single row tapered roller bearing serving as the outer bearing in the front wheel hub assembly of all Lada VAZ 2101–2107 series vehicles. Unlike deep groove ball bearings, tapered roller bearings are specifically engineered to handle combined radial and axial (thrust) loads simultaneously — an essential requirement for automotive wheel hub applications where cornering forces, braking loads, and vehicle weight all act on the hub bearing assembly at once.

At 19.05×45.25×15.494mm and 0.42kg, the 6-7804Y features:

• Tapered raceway geometry — rollers, inner ring (cone), and outer ring (cup) share a common apex point, ensuring pure rolling contact and minimal friction under combined loading

• GCr15 chrome steel construction — high hardness (60–64 HRC), superior fatigue resistance, and long service life under automotive wheel hub operating conditions

• GOST dimensional compliance — ensures direct interchangeability with OEM Lada VAZ parts and other GOST-compliant aftermarket suppliers

• Separable design — cone (inner ring + rollers + cage) and cup (outer ring) are separable, simplifying installation and replacement in the wheel hub

Vehicle Fitment

Front Wheel Hub Bearing Set — 6-7804Y + 6-7805Y

The VAZ 2101–2107 front wheel hub uses two tapered roller bearings mounted in a back-to-back arrangement to handle both radial wheel loads and bidirectional axial forces during cornering and braking.

Always replace both bearings as a set. Mixing worn and new bearings results in incorrect hub preload, uneven load distribution, accelerated wear, and potential wheel play. The complete front hub bearing kit is available as 21010-3101800-86.

Applications

• Primary: Lada VAZ 2101–2107 series and VAZ-1111 OKA front wheel hub outer bearing position

• Aftermarket: Direct OEM-specification replacement for Russian and CIS vehicle fleets

• Export markets: Russia, Ukraine, Kazakhstan, Belarus, Eastern Europe, and global Lada aftermarket distributors

Cross-Reference

Installation Notes

• Always replace in pairs — outer (6-7804Y) and inner (6-7805Y) together

• Clean the hub thoroughly before installation — remove all old grease, debris, and corrosion from the hub bore and spindle

• Pack with wheel bearing grease — fill the hub cavity and coat both bearing assemblies fully before installation

• Set correct preload — adjust the hub nut to achieve zero play with smooth rotation; excessive preload causes overheating and premature failure; insufficient preload causes wheel play and vibration

• Use a proper bearing driver — never strike the bearing directly; use a correctly sized driver tube on the outer ring (cup) during press-fit installation

FAQ

Q: Is 6-7804Y a tapered roller bearing or a deep groove ball bearing?

The 6-7804Y is a single row tapered roller bearing. It is specifically designed to handle the combined radial and axial loads of an automotive front wheel hub — deep groove ball bearings are not used in this position on the VAZ 2101–2107.

Q: What is the difference between 6-7804Y and 6-7804U?

Both designations refer to the same bearing geometry. The suffix letter indicates the GOST precision/quality class variant. For standard aftermarket replacement, either designation is interchangeable. Confirm with your supplier if a specific class is required.

Q: Can I replace only the outer bearing (6-7804Y) without replacing the inner (6-7805Y)?

Not recommended. Both bearings share the same hub preload setting. Replacing only one bearing results in mismatched wear states, incorrect preload, and accelerated failure of the new bearing. Always replace as a set.

Q: What grease should I use?

Use a lithium-based or moly-fortified wheel bearing grease rated for automotive hub applications. Pack the bearing fully and fill the hub cavity between the two bearings before fitting the hub seal.

Q: Is this bearing compatible with Lada Niva (VAZ 2121)?

The Lada Niva uses a different front hub design with different bearing specifications. Please contact our team with your vehicle model and OEM part number for a confirmed fitment check.

Q: What documentation is available?

GCr15 material certificates, dimensional inspection reports, GOST compliance documentation, packing lists, and certificates of origin. SGS / BV third-party inspection available on request.

Q: OEM / private label available?

Yes. Custom branded packaging for distributors and wholesalers. MOQ and pricing on request.

Related Lada / VAZ Bearings — Nexans Bearings Range

Contact Nexans Bearings