Semi-Trailer Parallel Spindle 115
If you’re in the market for a rugged, high-performance replacement for your semi-trailer’s parallel spindle, the Semi-Trailer Parallel Spindle 115 is built to handle the job. Designed for 5 ¾” axle tubes, this spindle ensures precise load distribution, smooth wheel rotation, and long-lasting reliability for heavy-duty trailers.
Machined from 1040 high-strength steel and reinforced through induction heat treatment, the Parallel Spindle 115 withstands high speeds, heavy loads, and extreme operating conditions—making it an ideal choice for utility trailers, car haulers, and commercial freight applications.
Each Semi-Trailer Parallel Spindle 115 is carefully inspected, securely packed, and shipped from our North American warehouse. The package includes an ABS mount and a front breather cap for seamless installation.
Don’t forget: This spindle requires a 115 Series Sleeve.
In stock
| Type: | Parallel trailer spinlde |
| Recommended Fit For: | Semi-trailers with parallel spindles and 5 3/4" axle tube |
| Heat Treatment: | Yes |
| Weight: | 45 lbs |
| Warranty: | 1 Year Limited Warranty |
| Compatible Parts: | Outer bearing set 415, Timken inner bearing set 415, National seal 370065A, Pro-Torque Lock nut 447-4723 |
In stock
Description
The Semi-Trailer Parallel Spindle 115 is engineered with a uniform cylindrical shape, maintaining a consistent diameter throughout. This design provides balanced load distribution and works seamlessly with ball or cylindrical roller bearings for smooth performance under heavy-duty conditions.
Engineered for Heavy Loads – Designed for long-haul freight, utility trailers, and car haulers, ensuring optimal performance on varied terrains and extreme weather conditions.
Versatile Compatibility – Works with Meritor, Dana Spicer, Eaton, and other major axle brands, as well as Freightliner, Kenworth, Peterbilt, Mack, and Volvo trucks.
Straightforward Maintenance – Unlike tapered spindles, parallel spindles simplify bearing replacement, making them ideal for fleet operators prioritizing ease of service.
Built for Longevity – This precision-machined spindle enhances bearing fitment, reduces wear, and extends axle component life, keeping trailers on the road longer.
Common 5 ¾” axles include Hendrickson TRI AXLE® Series and select Meritor MFS Series models. Our Semi-Trailer Parallel Spindle 115 offers a durable, high-performance solution for these, and many other high quality axle brands.
Whether you’re hauling freight, transporting vehicles, or managing a commercial fleet, the Semi-Trailer Parallel Spindle 115 provides the strength, reliability, and efficiency to keep your trailer running at peak performance.
Required Tools
Having the right tools and equipment is key to a successful installation. This list covers essential equipment that most shops already have, but we recommend taking a moment to ensure everything is on hand before beginning.
Safety Equipment
- Flashlight
- Safety Glasses
- Face Shield
- Welding Helmet
- Ear Plugs
- Cotton Heavy Duty Thick Welding Gloves
Measuring Tools
- Digital Caliper 0-6"/150mm
- Measuring Tape and Ruler
- Trailer Measuring Tool for Parallel and Tapered (shipped with practice spindles for product demo)
Hand Tools
- Sledge Hammer
- Chipping Hammer
Specialized Tools
- Stemco Seal Driver with Tube, Part: 555-0001
- STEMCO STE 555-5039 H0
Gas and Tanks
- Acetylene and Oxygen Tanks
Power Tools & Accessories
- 5" Electric Grinder or Battery Powered
- 5" Wire Wheels
- Cutting and Grinding Discs (5" or less)
- Makita GS5000 5" Straight Grinder
- Air Die Grinder (or electric)
- Welding Machine (MIG or Stick)
- Welding Rods 7018
- Cutting Torch and Heating Torch Set (Heavy Duty)
- Shop Fan (Battery or Electric to cool down spindle after installation)
Lubricants, Fluids, & Paints
- Red-Tac EP2 Grease
- Black Rust Paint
Semi-Trailer Parallel Spindle 115 – Frequently Asked Questions
How does a Parallel Spindle 115 differ from a Tapered 115 Spindle?
The Parallel Spindle 115 maintains a uniform cylindrical shape throughout its length and is designed for ball or cylindrical roller bearings, making it ideal for easier maintenance and lighter load applications. In contrast, the Tapered Spindle 115 has a cone-shaped design that accommodates tapered roller bearings, providing better weight distribution, higher impact absorption, and superior stability for heavy-load trailers like tankers and bulk haulers.
What axle tube size is required for a Parallel Spindle 115?
The Parallel Spindle 115 is specifically designed for 5 ¾-inch axle tubes.
Is this the right spindle for the job?
Not sure if this will fit your trailer?
The Semi-Trailer Parallel Spindle 115 features a 115mm outer diameter, and is for trailers with a 5 3/4 inch axle tube. This spindle is compatible with:
- Outer bearing set 415
- Timken inner bearing set 415
- National seal 370065A
- Pro-Torque Lock nut 447-4723
If you’re still in doubt, contact us and we’ll help you find the right product.
Related products
Important: This spindle requires a sleeve!
Don't forget to add a sleeve to your cart before checking out when purchasing 75, 85 or 115 Trailer Spindle models.
To learn more, watch full trailer spindle removal and installation videos:
Our Spindle Wizard will help you pair the perfect sleeve for your trailer spindle. Click below to launch the wizard.
Reviews
There are no reviews yet.