Build-Your-Own 5-Lug Trailer Axle Stub Kit — Square Spindle
Part Number: STUB-BT8-545-SQ
This is a single stub-end axle kit designed for building or repairing a light-duty trailer axle assembly. The square spindle tail shaft is intended to be welded to axle tubing and is commonly used on utility trailers, side-car trailers, and custom builds.
The spindle is rated at 1,000 lbs per wheel for a combined axle capacity of 2,000 lbs. This spindle does not include an EZ Lube grease zerk.
Features
| Feature | Description |
|---|---|
| Spindle Design | Square tail shaft for welding to axle tube |
| Capacity | 1,000 lbs per wheel (2,000 lbs per axle) |
| Hub Pattern | 5 on 4.5 bolt circle |
| Grease System | Standard spindle (no EZ Lube grease zerk) |
| Application | Utility trailers, side-car trailers, custom axle builds |
Specifications
| Specification | Detail |
|---|---|
| Part Number | STUB-BT8-545-SQ |
| Axle Rating | 2,000 lbs total capacity |
| Spindle Base | 1.50" square weld-on tail shaft |
| Bolt Pattern | 5 x 4.5 |
| Bearing Size | L44643 (inner and outer) |
| Seal Size | 1.25" ID — GS-1250DL |
Kit Contents
| Quantity | Component | Part Number |
|---|---|---|
| 1 | Idler Hub — 5 on 4.5 (2,000 lb) | RVI-BT-5450 |
| 1 | Square Spindle — 1.50" Base | SP-150BT8-SQ |
| 5 | 1/2"-20 Lug Nuts | — |
| 1 | Dust Cap Set (1.98") | DC-200L / DC-RP |
| 2 | Bearings — 1.00" | L44643 |
| 1 | Grease Seal — 1.25" ID | GS-1250DL |
| 1 | Spindle Nut | — |
| 1 | Spindle Washer | — |
Axle tubing is not included. Confirm axle tube size, weld requirements, and trailer load rating before installation. This spindle is intended for standard grease packing only.