Semi-Trailer Tapered Spindle 75
If you’re looking for a reliable replacement for your semi-trailer’s tapered spindles, you’ve come to the right place. This spindle is designed for axles with a 5″ OD axle tube.
Expertly machined from 1040 steel and enhanced through precision induction heating, our semi-trailer tapered spindles provide the strength and durability you’ve come to expect from all our products.
Each semi-trailer tapered spindle is thoroughly inspected, carefully packed, and shipped from our North American warehouse. The package includes an ABS mount and a front breather cap.
Don’t forget: This spindle requires a 75 Series Sleeve.
In stock
| Type: | Tapered trailer spindle |
| Recommended Fit For: | Semi-trailers with tapered spindles and up to 5" axle tube |
| Heat Treatment: | Yes |
| Weight: | 45 lbs |
| Warranty: | 1 Year Limited Warranty |
| Compatible Parts: | Outer Bearing 413 (HM212049-HM212011), Inner bearing 414 (HM218210 & HM218248), National Seal 370025A, Pro-Torque Lock nut 447-4743 |
In stock
Description
When it comes to maintaining the longevity and performance of your semi-trailer, choosing the right parts is crucial. Our semi-trailer tapered spindles are not only crafted from high-quality, unalloyed 1040 steel but also undergo a unique heat treatment to increase their hardness and strength where it counts most. By applying induction heating to the bearing area of our spindles, it ensures they can reliably withstand the demanding conditions of the road, day after day.
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
The average lifespan of a semi-trailer in North America is between 10 to 15 years, depending on factors like maintenance, road conditions, and usage. Using high-quality replacement parts, such as our tapered spindles, is a great way to maximize a trailer’s lifespan and service.
Choosing the Right Spindle for Your Trailer
Selecting the right spindle is crucial for ensuring optimal performance, longevity, and efficient load handling. The two most common types, parallel spindles and tapered spindles, each provide unique advantages based on the specific requirements of your trailer.
Parallel Spindles
- Bearing Compatibility – Designed for use with ball or cylindrical roller bearings.
- Load Suitability – Best suited for lighter loads, such as utility trailers and cargo haulers.
- Maintenance – Allows for easier bearing installation and replacement, reducing downtime.
- Performance – Provides smooth wheel rotation and even load distribution.
Tapered Spindles
- Shape – Features a cone-shaped design, wider at the base and narrowing at the end.
- Bearing Compatibility – Built for tapered roller bearings, which can handle higher stress loads.
- Load Suitability – Ideal for heavy-load trailers like tankers, flatbeds, and bulk haulers.
- Maintenance – Offers stronger load support and better weight distribution under extreme conditions.
- Performance – Absorbs higher impact loads and provides increased stability for demanding applications.
Both parallel and tapered spindles serve a crucial role in the trucking industry, and choosing the right type depends on your trailer’s specific weight capacity, bearing system, and performance requirements. Whether you need the balanced efficiency of a parallel spindle or the heavy-duty durability of a tapered spindle, we have the right replacement spindle that ensures optimal performance and longevity for you.
Is this the right spindle for the job?
Not sure if this will fit your trailer?
The Semi-Trailer Tapered Spindle 75 features a 75mm outer diameter, and is for trailers with a 5 inch axle tube. This spindle is compatible with:
- Outer Bearing 413 (HM212049-HM212011)
- Inner bearing 414 (HM218210 & HM218248)
- National Seal 370025A
- Pro-Torque Lock nut 447-4743
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.
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