Trailer Axle Bearing Kit – 1.75" x 1.25" #42 Spindle with Oil Cap
Part Number: BK-8000-OC
Service kit for one hub on 8,000 lb axles from Dexter, AL-KO, Quality, and other manufacturers using a #42 spindle (1.75″ inner / 1.25″ outer bearing journals).
Product Overview
The BK-8000-OC Bearing and Seal Kit provides every wear component required to service a single oil-bath hub. It includes premium tapered roller bearings and races, a double-lip oil seal, and the three individual components of the oil-cap system — the metal cap, rubber inspection plug, and sealing O-ring — along with the proper tang washer and cotter pin for spindle nut retention.
Two kits are required per axle. For grease-lubricated hubs, use BK-8000-GC (grease-cap version).
Kit Contents
| Qty | Part No. | Description | Details |
|---|---|---|---|
| 1 | 02475 | Outer Bearing | 1.25″ ID — fits 02420 race |
| 1 | 02420 | Outer Race (Cup) | Matched to 02475 bearing cone |
| 1 | 25580 | Inner Bearing | 1.75″ ID — fits 25520 race |
| 1 | 25520 | Inner Race (Cup) | Matched to 25580 bearing cone |
| 1 | 10-63 (Aftermarket) | Oil Seal | 2.25″ ID × 3.38″ OD double-lip type — replaces Dexter 10-63 |
| 1 | 21-35 | Oil Cap (Metal) | Steel press-fit cap for Dexter 8K oil bath hubs |
| 1 | 46-32 | Rubber Inspection Plug | Removable fill plug for 21-35 cap (center opening ≈ 1″) |
| 1 | 10-45 | O-Ring Seal | Sits under 21-35 cap flange to seal against hub face (≈ 2.875″ OD) |
| 1 | 5-101 | Tang Washer | Locks spindle nut after final torque setting |
| 1 | 16549 | Cotter Pin | Secures castle nut through spindle groove |
Fitment & Use
- For #42 spindles with 1.75″ inner and 1.25″ outer bearing journals
- Rated for 8,000 lb axles using oil-bath hubs
- Compatible with Dexter, AL-KO, Quality, Axxis, and other major brands
- Works with EZ-Lube and Standard spindles
- Replaces OEM Dexter kit K08-200-90 and other aftermarket rebuild kits
- Each kit services one hub — order two for a complete axle
Technical Specifications
| Component | Measurement / Type |
|---|---|
| Spindle Type | #42 (1.75″ inner / 1.25″ outer) |
| Axle Capacity | 8,000 lbs per axle (4,000 lbs per hub) |
| Seal I.D. / O.D. | 2.25″ / 3.38″ (double-lip oil seal) |
| Bearing Type | Tapered roller — industry standard cones and cups |
| Lubrication System | Oil bath only (uses BK-8000-GC for greased hubs) |
Applications
- Flatbed and equipment trailers
- Gooseneck and pintle trailers
- Livestock and enclosed cargo trailers
- Heavy-duty RV and oil-bath axle systems
Note: Always verify bearing numbers stamped on your existing components before ordering. This is the oil-bath version (BK-8000-OC); for grease-lubricated axles, use BK-8000-GC.
Shipping
We ship quickly and carefully, with tracking provided on every order. Most items ship the same or next business day. Your parts will arrive safely and on time, ready to use.
Returns & Guarantee
Your satisfaction is guaranteed. Returns, refunds, and exchanges are accepted — no hassle. We stand behind every part we sell, so you can purchase with confidence.
Committed to Customer Service
At R and P Carriages, we believe in treating our customers like family. Whether you need a small replacement part or a complete trailer service, we’re here to help with friendly, expert support every step of the way.
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