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REPLACEMENT STUB AXLE END / TRAILER REPAIR
Stub Axle Spindle Replacement Kit 3.5K 5on5 Bolt Pattern #84 Spindle 3500 lbs
Part Number: STUB-84FZ-550-H
Designed to replace a damaged spindle section without replacing the entire axle beam. Includes hub, bearings, seal, dust cap, and #84 spindle components to service one side of the axle.
3,500 lb Capacity
5 on 5 Bolt Pattern
#84 Spindle (2\" Base)
Overview
This replacement stub axle kit is the ideal solution for repairing a trailer with a bent or scored spindle. Instead of the high cost and labor of replacing the entire axle tube, this stub end is welded into place. The 5 on 5 bolt pattern is common on many utility and specialized trailers, using approximately 4-3/4\" stud spacing.
R&P Service Insight
A stub axle end is a precision component. The spindle supports the hub assembly and provides the critical mounting surfaces for your bearings and seals.
- Welding Prep: Proper alignment during welding is critical to prevent uneven tire wear.
- Bearing Care: Always pack bearings with high-quality grease before final assembly.
- Safety: This kit services one side. Verify the other side’s condition while the trailer is jacked up.
R&P Knowledge Hub
Compatibility: Replacement for 3,500 lb trailer axles using standard #84 spindles.
Bolt Pattern: The 5 on 5 pattern uses approximately 4-3/4\" stud spacing. See diagram below.
Installation Notes: Stub ends must be professionally welded to the existing axle tube. Ensure the spindle is square to the axle beam.
Verification: Confirm your spindle type (#84), bolt pattern, and bearing numbers (L68149/L44649) before ordering.
Kit Includes
Complete Hub Assembly
1 × 3,500 lb Idler Hub (5 on 5 pattern) with pre-installed races.
Premium Spindle
1 × SP-20084NWC Spindle featuring a 2\" round base for secure welding.
Bearings & Seals
Includes L68149 Inner Bearing, L44649 Outer Bearing, and 10-19 Grease Seal.
Hardware Kit
Complete with 1.98\" Dust Cap, 1\" Axle Nut, and 1\" Spindle Washer.
Specifications
Specification
Detail
Axle Rating
3,500 lb
Bolt Pattern
5 on 5
Spindle Type
#84
Spindle Base
2.00\" Diameter
Inner Bearing
L68149 (1-3/8\" ID)
Outer Bearing
L44649 (1-1/16\" ID)
Seal
10-19
Repair Application
Category
Details
Vehicle Type
Utility, Car Hauler, Equipment Trailers
Axle Type
3,500 lb Straight or Drop Axle Beams
Spindle Fit
Designed for 2\" round tubing or bored-out square tubing
Notes
Verify bolt pattern and bearing sizes. Weld and align carefully.
Installation Safety: Stub axle installation requires structural welding. It is highly recommended that this be performed by a qualified welder or trailer technician to ensure the spindle is perfectly aligned and the weld penetrates sufficiently to support the 3,500 lb load rating. Verify all specifications before installation.
View 3,500 lb Stub Axles
Looking for different bolt patterns or axle ratings? We stock a full range of replacement spindles and hub kits.
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