Fitted To Vehicles From Audi, BMW, Ford, Jaguar, Land Rover, Mercedes, Saab, VW Alternators B1799DG8 B17-99DG8 17x52x17mm

Product Overview

The B1799DG8 is a single-row deep groove ball bearing with a 17 mm bore × 52 mm outside diameter × 17 mm width, engineered specifically as an automotive alternator drive-end (DE) bearing. It is a non-standard size (not part of the common 62/63 series catalogues), optimised for high-speed rotation, elevated temperatures, belt-driven loads, and sealed protection in automotive engine environments. The bearing is produced from GCr15 chrome steel and is pre-lubricated with high-temperature grease for extended service in hot engine bays.

Critical application and seal corrections

1. Application: alternator drive-end bearing, not “engine bearing”

The supplier form lists the application as “Automotive spare parts” and the product name says “automotive engine bearings.” Catalogue data is far more specific: the B1799DG8 is the drive-end bearing for automotive alternators, handling pulley and belt loads, high RPM, and temperature variations. It is commonly used in Bosch, Valeo (A14Vi/A15Vi), and Ford 6G series alternators, and vehicles including Audi, BMW, Ford, Jaguar, Land Rover, Mercedes, Saab, and VW. The Application field should be corrected to “Automotive alternator drive-end (DE) bearing”.

2. Seal type: DG8 denotes double sealed, not open

The supplier form specifies Seals Type: Open / No seals. The DG8 suffix in NSK nomenclature denotes double rubber seals (2RS / DD / DDU) — contact-type seals on both sides for dust, water, and contaminant protection. Related cross-references (B1799D2RS, B17-99D-2RS, B17-99DDW) consistently confirm the sealed configuration. The Seals Type field must be corrected from “Open” to “Double rubber seals (2RS / DD / DG8)” , and the Seal Material field should be populated as “Nitrile rubber (NBR)” or “Rubber contact seals”. Publishing an open-type bearing when the actual product is double-sealed is a material misrepresentation that will cause fitment and performance disputes.

3. Cross-reference: B1799DG8 = NSK B17-99DG8

The accessible technical data for this envelope is published under the NSK B17-99DG8 designation, and the two are used interchangeably. Other confirmed cross-references include FAG 806078, Cargo 140263 / 140958, NTN SC0352LLU, Valeo 592905 / 592936 / 593674, and Bosch 1120905012 / F00M990415. The listing should carry the NSK B17-99DG8 cross-reference prominently to improve searchability and buyer confidence.

Weight: ≈ 0.18 kg

The supplier form leaves the Weight field blank. The CRAFT catalogue entry for the sealed 17 × 52 × 17 mm alternator bearing lists 0.18 kg, and the NSK B17-99D data gives ≈ 0.16–0.179 kg. The 0.18 kg figure should be populated in the listing.

Load ratings and speed limits: not published

No accessible public catalogue publishes Cr, C0r, grease speed, or oil speed for the B1799DG8 / B17-99DG8 as a dedicated specification. These fields should remain blank or be marked “Consult supplier” rather than estimated from a generic 17 × 52 × 17 mm bearing.

Key Specifications

Note on cage material discrepancy: The supplier form specifies Nylon Cage / Nylon. The NSK B17-99D technical data describes a pressed steel cage. Nylon cages are used in some alternator bearing variants, but the cage material should be confirmed against the physical stock before publishing it as definitive. If the stock is steel-caged, the Cage fields should be updated.

Performance Features

• Alternator drive-end duty: The bearing is optimised for the drive-end position of an automotive alternator, where it must handle pulley and belt loads, high rotational speed, vibration, and elevated engine-bay temperatures.

• Double rubber seals (DG8): The contact-type rubber seals on both sides provide dust, water, and contaminant protection, retaining the high-temperature grease charge and protecting the rolling elements in the exposed alternator environment.

• High-temperature grease pre-charge: The bearing is pre-lubricated with alternator-grade high-temperature grease(lithium-based or special formulation), with the G8/G16E suffix indicating heat-resistant grease for extended life in hot engine bays.

• GCr15 chrome steel construction: Rings and balls are through-hardened for rolling-contact fatigue resistance under the high-cycle, high-speed loading of alternator service.

• Non-standard envelope: The 17 × 52 × 17 mm dimensions are outside the common 62/63 series, providing the specific shoulder and axial spacing required by the alternator housing and rotor shaft.

Application

The B1799DG8 / NSK B17-99DG8 is an automotive alternator drive-end bearing. It is used in Bosch, Valeo (A14Vi/A15Vi), and Ford 6G series alternators, and is fitted to vehicles from Audi, BMW, Ford, Jaguar, Land Rover, Mercedes, Saab, VW, and others. It is also documented as a Honda Civic alternator bearing and a Mercedes-Benz W163 / W210 / Sprinter replacement. In service, the bearing supports the alternator rotor at the drive end under belt tension and radial loads while rotating at engine-driven speed. Replacement requires alternator disassembly and should follow the vehicle manufacturer’s procedure for bearing installation and rotor alignment.

Ordering & Logistics

• Stock: 94 pcs

• Minimum order: 1 pc

• FOB price: US$10 – US$50 per piece

• Payment: PayPal / Western Union / T/T(100% in advance)

• Delivery: 3–4 workdays after payment

• Shipping: DHL / FedEx / UPS / TNT

• Ports: Shanghai / Guangzhou

• Packing: Standard export packing

• Brand: As required(authorized brands only)

• Country of origin: China

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