At a Glance
- >Axle tube — typically 3" or 4" square tubing depending on the application
- >Brake components
- >Wheels or tires
- Brand: R & P Carriages
- SKU: BYOAK-42-H865-SQ
Before You Order
Match the part number, measurements and connection points that apply to your trailer.
Fitment Check
| Bearings | Match inner and outer bearing numbers. |
|---|---|
| Seal | Match the seal number or dimensions. |
| Bolt Pattern | Verify the complete lug pattern. |
| Brake Size | Confirm when applicable. |
Product Details
Build-Your-Own Axle Series
7,000 lb Build-Your-Own Trailer Axle Kit w/ 8 x 6.5 Lug Idler Hubs and #42 Square Spindle
8-Lug Idler Hubs with #42 Square Weld-On Spindles. This KIT includes: (2) #42 square-base spindles
(2) 8-lug idler hubs – 8 on 6.5"
(2) Inner bearings – 25580
(2) Outer bearings – 14125A
(2) Grease seals – 10-10
(2) Grease seals – 10-36
(2) Dust caps – 2.71"
(2) Castle nuts
(2) Spindle washers
(2) Cotter pins and (16) Lug Nuts
SKU: BYOAK-42-H865-SQ 7,000 lb Capacity 8 on 6.5" Bolt Pattern
7,000 lb Axle Capacity
8 on 6.5" Bolt Pattern
Idler Hub Type
#42 Square Spindle Style
Key Measurements & Specs
| SKU | BYOAK-42-H865-SQ |
| Capacity | 7,000 lb |
| Hub Type | Idler (No brakes) |
| Bolt Pattern | 8 on 6.5" |
| Spindle Base | 2" square solid shaft |
Fitment / Application
| Application | Straight axle fabrication |
| Spindle | #42 square weld-on |
| Lubrication | Standard, non-EZ-Lube |
| Axle Tube | Not included |
| Fitment Check | Verify all dimensions before fabrication |
Top Features
| Complete Pair | Components for both axle sides |
| 8-Lug Setup | Two 8 on 6.5" idler hubs |
| Square Spindles | Two weld-on #42 spindles |
| Bearing Hardware | Kits, washers, nuts, and pins |
| Fabricator Format | Select the axle tube for the build |
Overview
This 7,000 lb build-your-own trailer axle kit is designed for fabricators and trailer builders who need an idler axle setup using 8-lug hubs and #42 square weld-on spindles.
The kit provides the hub, bearing, seal, dust-cap, spindle, washer, castle-nut, and cotter-pin components needed to fabricate a straight axle. The axle tube is not included.
R&P Service Insight
A fabrication-focused axle package
This kit is intended for builders who need the spindle, hub, bearing, seal, and retaining hardware while supplying the axle tube separately. Confirm the required hub-face dimension, spring-center dimension, tube size, and finished axle capacity before beginning fabrication.
R&P Knowledge Hub
What “build your own axle” means
The spindle placement and axle-tube length establish the finished hub-face measurement. Because the axle tube is not included, the builder is responsible for selecting the tube and establishing the final axle geometry for the intended trailer application.
Brand & Fitment Note
Match the listed 7,000 lb capacity, 8 on 6.5" bolt pattern, bearing sizes, seal sizes, and #42 spindle dimensions to the intended build. This is a fabrication kit and is not a preassembled axle.
R&P Repair Insight
Alignment determines the finished axle
Both spindles must be positioned and aligned correctly before final welding. Improper alignment can affect tire wear, tracking, bearing life, and overall trailer performance. Fabrication should be completed by a qualified technician.
Features
7,000 lb Axle Setup
Components are configured for a 7,000 lb build-your-own idler axle application.
8-Lug Idler Hubs
Includes two idler hubs with an 8 on 6.5" wheel bolt pattern.
#42 Square Spindles
Includes two weld-on spindles with 2" square solid-shaft bases.
Bearing Kits Included
Two bearing kits supply bearings, grease seals, and dust caps for both hubs.
Spindle Hardware
Round spindle washers, castle nuts, and cotter pins are included.
Builder-Selected Axle Tube
The axle tube is supplied separately so the builder can establish the required finished dimensions.
Included Components
| Quantity | Part Number | Included Component |
|---|---|---|
| 2 | SP-50642-SQ | #42 square weld-on spindles |
| 2 | 82865-1 | 8-lug idler hubs with 8 on 6.5" bolt pattern |
| 2 | HD-7000-KIT | 7,000 lb bearing kits with dust caps |
| 2 | SW1000 | Round spindle washers |
| 2 | FA-SN100 | Castle nuts |
| 2 | 165649 | Cotter pins |
Bearing Kit Breakdown
| Quantity Per Kit | Part Number | Component | Measurement |
|---|---|---|---|
| 1 | 021-043-02 | Dust cap | 2.71" OD |
| 1 | 25580 | Inner bearing | 1.75" ID |
| 1 | 14125A | Outer bearing | 1.25" ID |
| 1 | 10-10 | Grease seal | 2.125" ID |
| 1 | 10-36 | Grease seal | 2.25" ID |
Quantities shown are for one HD-7000-KIT bearing kit. This axle kit includes two bearing kits.
Specifications
| Specification | Detail |
|---|---|
| Part Number | BYOAK-42-H865-SQ |
| Product Type | Build-your-own idler axle kit |
| Axle Capacity | 7,000 lb |
| Hub Type | Idler |
| Bolt Pattern | 8 on 6.5" |
| Spindle Type | #42 square weld-on |
| Weld-On Base | 2" square solid shaft |
| Grease Type | Standard, non-EZ-Lube |
| Axle Tube | Not included |
Spindle Details & Dimensional Chart
SP-50642-SQ #42 square weld-on spindle dimensional reference
11" Overall Length
2" Square Solid Weld-On Base
1" Top Journal Diameter
5.93" Shaft Length
Not Included
- Axle tube — typically 3" or 4" square tubing depending on the application
- Brake components
- Wheels or tires
Important Installation Note
This kit is intended for fabrication use. Welding, spindle alignment, axle-tube selection, and final installation should be completed by a qualified technician. Always verify dimensions, component compatibility, and load requirements before fabrication or installation.
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