Swing Arm 45mm Stub Assembly with Bush
The SA4B-SL Swing Arm Assembly Bush is a heavy-duty, precision-machined swing arm solution designed for rear bar swing-away arms, spare wheel carriers and rear bumper swing mounts. Supplied complete with a 45mm x 250mm stub axle rated 1400KG and high-quality SL bearings fitted with dust caps and oil seals, this assembly gives smooth rotation, excellent load capacity and long service life for 4WD, trailer and custom fabrication applications.
Key Features
- Stub axle: 45mm × 250mm, rated 1400KG for robust load carrying.
- Bearings: Slimline SL bearings supplied with dust cap and oil seal for protection against contamination and better longevity.
- Bush design: Precision bush for tight running fit and minimal play, suited to swing-away spare wheel holders and rear bull-bar arms.
- Fitment: Commonly used on rear bar swing-away arms, spare wheel holders and custom bumper fabrications.
- Material and finish: Machined steel components with corrosion-resistant finishes (confirm finish option with supplier at time of order).
Specifications
| Attribute | Specification |
|---|
| SKU | SA4B-SL |
| Stub axle | 45mm x 250mm |
| Rated capacity | 1400KG |
| Bearings | SL bearings with dust cap and oil seal |
| Typical applications | Rear swing-away arms; spare wheel carriers; rear bumper mounts |
Sources: .
Benefits
- High load capacity — 1400KG-rated stub axle supports heavier spares and loads with confidence.
- Protected bearings — SL bearings with dust caps and oil seals reduce maintenance and resist water, mud and grit ingress.
- Smooth, reliable action — engineered fit between bush, stub and bearing for low friction and repeatable operation.
- Versatile fit — ideal for aftermarket rear bar kits, DIY fabrications and commercial trailer applications.
Typical Uses
- Swing-away spare wheel brackets for 4WD and off-road vehicles.
- Rear bull-bar swing arms and heavy-duty bumper pivots.
- Custom trailer and enclosure swing pivots where a robust, serviceable hinge is required.
Installation Tips
- Confirm stub axle orientation and square vs round option before fitting; check chamfers and lock washer alignment.
- Use appropriate grade locking hardware (split pin, nyloc nut or castellated nut) and torque to manufacturer recommendations.
- Grease bearings through grease nipple if supplied, and re-check seals after initial use in wet or dusty conditions.
- Measure existing bracket internal bore and verify bush O.D. for a press or interference fit; ream or adapt bracket if required.
