Auto Wheel & Tractor Bearing 256805 (38-1244) | Double Row Angular Contact Ball Bearing 25×52×23mm — Wheel Hub & Agricultural Tractor, OEM & Wholesale Supply

Product Specifications

Understanding the 256805 Part Number

The 256805 carries size code 05 within the GB 25-68xx series — the smallest size code in the series as supplied by Nexans Bearings. Note that size code 05 also appears in the 25-69xx series ( 256905, 25mm bore, 55mm OD, 30mm width) — a different bearing in a different series that shares the same bore size but has different outer diameter and width.

⚠️ The Only Sub-1:1 Width-to-Bore Ratio in the Range: 256805's Narrow Profile

The 256805 is unique in the entire Nexans Bearings auto wheel and tractor hub range as the only double row angular contact ball bearing with a width narrower than its bore:

The 0.92:1 width-to-bore ratio — where width (23mm) is less than bore (25mm) — makes the 256805 the most axially compact double row angular contact ball bearing in the range. This narrow profile is specifically designed for hub assemblies where axial space is limited, while still delivering the bidirectional axial load capacity of the 25° double row angular contact design. This is in contrast to all other double row angular contact bearings in the range, which have width-to-bore ratios ≥ 1.0:1.

⚠️ Critical Distinction: Same 25mm Bore, Different Series — 256805 vs 256905

Two bearings in the range share a 25mm bore but belong to different GB series with different dimensions:

⚠️ WARNING: Both bearings fit a 25mm shaft but require different hub housing bores (52mm vs 55mm) and different axial space (23mm vs 30mm). They are not interchangeable. Confirm your hub housing bore: 52mm housing → 256805 / 55mm housing → 256905. The 256805's narrower profile (23mm) suits axially constrained assemblies; the 256905's wider profile (30mm) provides greater axial load capacity.

GB 25-68xx Series: All Three Bore Sizes

The GB 25-68xx series from Nexans Bearings covers three bore sizes: 256805 (25mm), 256807 (35mm), and 256808 (40mm). Note the non-sequential size codes (05 → 07 → 08), indicating that size code 06 in the 25-68xx series is not currently in the Nexans Bearings range. The 256805 is the only member with a sub-1:1 width-to-bore ratio.

Width-to-Bore Ratio Across All Double Row Angular Contact Bearings

The 256805 is the only bearing in the range with a width-to-bore ratio below 1:1 — its narrow 23mm width relative to its 25mm bore is a unique design characteristic within the GB 25-68xx series at this bore size.

Angular Contact Ball Bearings in the Range: Full Series

Complete Auto Wheel & Tractor Hub Bearing Range — All Types

✅ Nexans Bearings supplies all fifteen sizes across three bearing types — source your complete auto wheel and tractor hub bearing range from a single supplier. Contact us for a combined quote.

Quick selection guide by bore size: 20mm bore → 156704 (single row angular contact) 25mm bore → confirm OD: 52mm housing → 256805 (narrow, 23mm wide) / 55mm housing → 256905 (standard, 30mm wide) 28mm bore → 256906 (double row angular contact) 34mm bore → 256907⚠️ confirm shaft is exactly 34mm 35mm bore → 256807⚠️ confirm shaft is exactly 35mm 37mm bore → 256908 (double row angular contact) 38mm bore → confirm OD: 72mm → 9036338006 / 73mm → 44300SAA003 / 74mm → 9036938003 40mm bore → confirm type: angular contact → 256808 / deep groove ball → 9036340066 43mm bore → confirm OD: 79mm → 44300S5A008 / 82mm → 9036343008 45mm bore → 44300S47008

Cross Reference Numbers

Contact our technical team with your application details for confirmed international cross-references.

Vehicle & Equipment Compatibility

The 256805 double row angular contact ball bearing is used in compact wheel hub applications requiring a 25mm bore and 52mm housing:

Please confirm exact fitment using part number 256805 and verify hub housing bore is 52mm (not 55mm — see 256905). Contact our technical team with your equipment make, model, and year.

Product Overview

The 256805 is a sealed double row angular contact ball bearing manufactured to OE-equivalent specifications for automotive wheel hub and agricultural tractor hub applications. With a 25mm bore, 52mm outer diameter, and 23mm width, it is the smallest-bore member of the GB 25-68xx series and the most axially compact double row angular contact ball bearing in the Nexans Bearings range.

Its defining characteristic: a width (23mm) narrower than its bore (25mm) — a 0.92:1 width-to-bore ratio that is unique in the range. This narrow profile suits hub assemblies where axial space is constrained, while the 25° double row angular contact geometry still delivers bidirectional axial and moment load capacity in a single sealed unit.

For buyers sourcing 25mm bore angular contact bearings, the 256805 is the 52mm OD, 23mm wide (compact) variant, distinct from the 256905 (55mm OD, 30mm wide, GB 25-69xx series). Confirm your hub housing bore (52mm or 55mm) and available axial space before selecting between the two.

This bearing delivers:

• Bidirectional axial load capacity — double row 25° angular contact handles thrust in both directions simultaneously

• Compact narrow profile — 23mm width (sub-bore) suits axially constrained hub assemblies

• High radial load capacity — two rows of balls share the full radial load from vehicle weight

• Moment load resistance — double row arrangement resists hub tilting from cornering and uneven terrain

• Single-unit hub solution — no paired bearings required; one bearing handles all load directions

• Superior contamination resistance — sealed construction blocks road grit, water, and mud

• Excellent grease retention — factory pre-lubricated, sealed for life under normal operating conditions

• OE-equivalent fit — manufactured to GB specification for direct replacement of 256805

• Chrome steel durability — GCr15 / 52100 material provides high hardness and fatigue strength

Sourced from Nexans Bearings' trusted manufacturing network — including leading Chinese bearing brands QC, C&U, ZWZ, TWB, and ZWA — every unit undergoes strict dimensional and quality inspection before dispatch.

Why Source from Nexans Bearings

OEM & Private Label Service

• Custom Packaging Design — your brand, your box, your label

• Laser Marking — part numbers (256805) and logos etched directly on the bearing

• GB Spec Matching — dimensional validation against OEM specification

• Clearance & Grade Selection — specify C0/C2/C3 clearance and P0–P5 precision grade per your application

• Flexible MOQ — suitable for startups and established importers alike

• Full Documentation — inspection reports, material certificates, and packing specifications per order

• Dedicated Account Management — assigned support for OEM and high-volume clients

Frequently Asked Questions

Q: What are all the part numbers for this bearing?

This bearing is referenced as 256805 (GB standard part number) and 38-1244 (Nexans reference).

Q: What are the exact dimensions of the 256805?

Inner Diameter 25mm × Outer Diameter 52mm × Width 23mm.

Q: Why is the width (23mm) narrower than the bore (25mm)?

The 0.92:1 width-to-bore ratio is a design characteristic of the GB 25-68xx series at the 25mm bore size. The narrow 23mm profile is engineered for hub assemblies with limited axial space, while the 25° double row angular contact geometry still provides bidirectional axial load capacity. This is the only bearing in the Nexans Bearings range with a sub-1:1 width-to-bore ratio.

Q: What is the difference between the 256805 and the 256905? Both have a 25mm bore.

Both fit a 25mm shaft, but: 256805 = 52mm OD, 23mm width, GB 25-68xx (compact/narrow) / 256905 = 55mm OD, 30mm width, GB 25-69xx (standard). They require different hub housing bores (52mm vs 55mm) and different axial space. They are not interchangeable. Confirm your hub housing bore before ordering.

Q: How do I choose between the 256805 and 256905 for my 25mm bore application?

Confirm your hub housing bore: 52mm → 256805 / 55mm → 256905. If housing bore is confirmed but axial space is also a constraint, the 256805 (23mm wide) requires 7mm less axial space than the 256905 (30mm wide).

Q: How does the 256805 fit within the GB 25-68xx series?

The 25-68xx series from Nexans Bearings has three bore sizes: 256805 (size code 05, 25mm bore), 256807 (size code 07, 35mm bore), and 256808 (size code 08, 40mm bore). The 256805 is the smallest and most compact member.

Q: What equipment uses the 256805 bearing?

The 256805 is used in compact automotive wheel hubs and small agricultural tractor wheel hubs with a 25mm bore and 52mm housing bore. Contact us with your equipment make and model to confirm exact fitment.

Q: Is the 256805 pre-lubricated?

Yes — factory pre-lubricated with grease, sealed on both sides. No relubrication required under normal operating conditions.

Q: Do you supply both 25mm bore variants (256805 and 256905)?

Yes — both are in stock. Confirm your hub housing bore (52mm or 55mm) when ordering.

Q: Do you offer OEM or private label?

Yes — full OEM and private-label services. Contact our sales team.

Q: What is the minimum order quantity (MOQ)?

Flexible and negotiable. Contact us for a tailored quote.

Q: How quickly can you ship?

Ready stock maintained. Orders typically dispatched within 3–7 business days.

Q: Do you provide quality certifications?

Yes — dimensional inspection reports, material certificates, and packing specifications available on request.

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