Auto Wheel & Tractor Bearing 44300S47008 (38-1258) | Double Row Ball Bearing 45×84×40/42mm — Wheel Hub & Agricultural Tractor, OEM & Wholesale Supply

Product Specifications

Understanding the 44300S47008 Part Number

The 44300S series is a Chinese national standard (GB) double row sealed ball bearing series widely used in domestic agricultural machinery and light vehicle wheel hub applications. The 47008 suffix references the associated component or complete hub unit assembly number. Contact our technical team for full specification documentation.

Dual Width Specification Explained: 40mm vs 42mm

A common question from buyers regarding the 40/42mm dual width:

When cross-referencing or ordering, always specify both width values ( 40/42mm) to ensure correct fitment. A bearing listed as only 40mm or only 42mm wide may be a different variant.

Cross Reference Numbers

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

Vehicle & Equipment Compatibility

The 44300S47008 double row ball bearing is used across a wide range of automotive and agricultural equipment wheel hub applications:

Please confirm exact fitment using part number 44300S47008 or contact our technical team with your equipment make, model, and year.

Why Double Row Ball Bearings for Wheel Hub Applications

Agricultural tractor and light vehicle wheel hubs specify double row ball bearings rather than single row bearings because:

Product Overview

The 44300S47008 is a sealed double row deep groove ball bearing manufactured to OE-equivalent specifications for automotive wheel hub and agricultural tractor hub applications. The 45×84×40/42mm dimensions and double row construction make it specifically suited to the combined radial, axial, and moment loads of wheel hub positions in tractors and light vehicles operating under demanding agricultural and road conditions.

This bearing delivers:

• High radial and axial load capacity — double row ball arrangement handles the heavy combined loads of loaded tractor and vehicle wheel hubs

• Moment load resistance — double row geometry resists tilting forces from uneven terrain and field operation

• Superior contamination resistance — sealed construction blocks dust, mud, and moisture in agricultural operating environments

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

• Compact single-unit design — replaces two separate single row bearings in a single, easy-to-install assembly

• OE-equivalent fit — manufactured to GB/OE specification for direct replacement of 44300S47008

• Chrome steel durability — GCr15 / 52100 material provides high hardness, wear resistance, and fatigue strength for long service life

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

Nexans Bearings provides a complete OEM and private-label program for agricultural machinery and automotive parts distributors:

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

• Laser Marking — part numbers (44300S47008) and logos etched directly on the bearing

• GB / OE 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 44300S47008 (full part number / GB standard) and 38-1258 (NKS reference). The 44300S is the bearing designation; 47008 references the associated component or assembly number.

Q: What are the exact dimensions of the 44300S47008?

The dimensions are: Inner Diameter 45mm × Outer Diameter 84mm × Width 40/42mm. The dual width (40mm inner ring / 42mm overall) must both be confirmed when ordering or cross-referencing.

Q: What does the "40/42mm" dual width mean?

The 40mm is the inner ring width; the 42mm is the total assembly width including the outer ring, seals, and retaining features. Always specify both values when ordering to ensure correct fitment.

Q: What type of bearing is the 44300S47008?

It is a sealed double row deep groove ball bearing — designed to handle the high combined radial, axial, and moment loads of wheel hub positions in agricultural tractors and light vehicles.

Q: Why does this bearing have two rows of balls?

Double row construction provides higher load capacity, improved axial load handling, and moment load resistance compared to single row bearings — essential for the demanding load profile of tractor and vehicle wheel hub applications. It also simplifies hub assembly by replacing two separate single row bearings.

Q: What equipment uses the 44300S47008 bearing?

This bearing is used in agricultural tractor wheel hubs and automotive wheel hub assemblies for light commercial vehicles. It is widely used in Chinese domestic tractor platforms. Contact us with your equipment make and model to confirm exact fitment.

Q: Is the 44300S47008 pre-lubricated?

Yes. The bearing is factory pre-lubricated with grease and sealed on both sides. Under normal operating conditions, no relubrication is required during the bearing's service life.

Q: What are the signs of a failing wheel hub bearing on a tractor?

Common symptoms include: humming, growling, or rumbling noise from the wheel that increases with speed, vibration felt through the steering or chassis, uneven tire wear, wheel play detected when rocking the wheel, or bearing overheating after operation. Replace promptly to avoid wheel hub failure in the field.

Q: Do you supply other agricultural tractor wheel hub bearings?

Yes. Nexans Bearings maintains extensive stock of wheel hub bearings for Chinese domestic tractors and agricultural machinery. Contact us with your part numbers for availability and pricing.

Q: Do you offer OEM or private label for this bearing?

Yes. We provide full OEM and private-label services including custom packaging, laser-etched branding, and GB-compliant documentation. Contact our sales team to discuss your requirements and MOQ.

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

MOQ is flexible and negotiable. We welcome both trial orders and large-volume contracts. Contact us for a tailored quote.

Q: How quickly can you ship?

We maintain ready stock of agricultural and automotive wheel hub bearings including the 44300S47008. Orders are typically dispatched within 3–7 business days. Expedited shipping is available upon request.

Q: Do you provide quality certifications?

Yes — dimensional inspection reports, material certificates, and packing specifications are available upon request for every order.

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