UFP SS 1.68" OD Spindle Wear Ring Sleeve DB35-42 3500 Boat Trailer Axle Seal
Replacement stainless steel spindle wear ring for compatible UFP trailer axle applications. This sleeve provides the sealing surface used by the hub grease or oil seal on axles originally equipped with a removable wear ring.
Key Measurements & Specs
| Specification | Detail |
|---|---|
| Part Number | 33522U |
| Product Type | Spindle wear ring / spindle seal sleeve |
| Material | Stainless steel |
| Outer Diameter | Approx. 1.68" |
| Lubrication Hole | None |
| Quantity Included | 1 spindle wear ring |
Fitment / Application
| Category | Details |
|---|---|
| Axle Application | UFP trailer axles rated from 3,500 lb to 4,200 lb |
| Common Trailer Use | Many boat trailer axle applications using UFP-style spindle hardware |
| Primary Fit Check | Axle must have originally used a factory-installed spindle wear ring |
| Identification Clue | Many UFP axles use a flat axle nut with a thin stamped steel “bottle cap” style retainer secured by a cotter pin |
| Important Note | Verify axle brand, seal size, spindle style, and existing sleeve configuration before ordering |
Top Features
| Feature | Buyer Benefit |
|---|---|
| Stainless Steel Construction | Provides a durable seal riding surface for compatible hub assemblies |
| UFP Axle Application | Designed for compatible UFP 3,500–4,200 lb trailer axle setups |
| Seal Surface Replacement | Replaces the original wear ring where the grease or oil seal rides |
| No Lubrication Hole | Correct for applications requiring a smooth sleeve without a lube passage |
Overview
The 33522U stainless steel spindle wear ring is used on compatible UFP trailer axles in the 3,500 lb to 4,200 lb range. It installs on the spindle where the hub grease or oil seal rides, helping provide the proper sealing surface for the hub assembly. This part is intended for axles that originally came with a removable factory-installed wear ring.
R&P Service Insight
This sleeve should be treated as a replacement wear ring, not as a universal repair sleeve or seal saver. Fitment depends on the original axle design and the seal surface configuration already present on the spindle.
- Check the Axle Style: Confirm that the axle is a UFP-style axle before ordering.
- Check the Existing Sleeve: This part is intended to replace the original wear ring, not add a sleeve to a spindle that was not designed for one.
- Check the Seal Area: Verify the grease or oil seal size and confirm that the seal rides on the sleeve surface.
R&P Knowledge Hub
Compatibility: This spindle wear ring is intended for compatible UFP trailer axles rated from 3,500 lb to 4,200 lb. Many UFP axles in this range use a grease or oil seal that rides on an approximate 1.68" sleeve surface.
Axle Identification: UFP axles are commonly found on many boat trailer applications. One common identifying feature is a flat axle nut covered by a thin stamped steel “bottle cap” style retainer secured with a cotter pin.
Installation Notes: The existing sleeve normally must be removed before the replacement ring is installed. Installation may require cutting off the old sleeve and carefully driving the new ring into place using the inner bearing as a mandrel with a short section of pipe or similar tool to apply even pressure.
Performance Insight: The hub seal depends on a clean, properly sized riding surface. A worn, damaged, grooved, or incorrect sleeve can contribute to grease or oil leakage at the hub seal area.
Dimension Notice: The manufacturer does not publish official dimensional specifications for every measurement. Listed dimensions are approximate and provided for reference only.
Brand & Fitment Note
Selling Application: UFP-compatible spindle wear ring for listed trailer axle applications.
Application Reference: UFP, EZ Loader, Ranger, and other trailer or axle names may be used as compatibility references only when the axle, spindle, seal size, and sleeve configuration match.
What This Means: This listing is for one 33522U spindle wear ring used in compatible UFP-style axle applications. It is not a universal spindle repair sleeve and should not be ordered by axle weight rating alone.
Before Ordering: Verify axle brand, seal size, existing wear ring style, hub configuration, and spindle condition before installation.
R&P Repair Insight
Spindle wear rings are often replaced when the seal surface is damaged, grooved, corroded, or no longer providing a reliable surface for the hub seal. Careful installation matters because the replacement ring must sit evenly and provide a smooth sealing surface.
- Confirm Original Design: Do not install this sleeve on a spindle that was not originally designed to use a wear ring.
- Inspect the Seal Surface: Replace the sleeve if the seal riding area is grooved, pitted, or damaged.
- Use Even Installation Pressure: Drive the ring into place squarely to avoid distortion or uneven seal contact.
Features
Replacement Spindle Wear Ring
Replaces the original sleeve where the grease or oil seal rides on compatible UFP trailer axles.
Stainless Steel Sleeve
Stainless construction provides a clean, durable sealing surface for compatible hub and seal assemblies.
Fits UFP 3,500–4,200 lb Applications
Designed for compatible UFP trailer axle applications in the 3,500 lb to 4,200 lb range.
Smooth No-Hole Design
Sleeve does not include a lubrication hole, making it suitable for applications that require a smooth seal surface.
Included Components
| Quantity | Item |
|---|---|
| 1 | Stainless steel spindle wear ring, part number 33522U |
| Not Included | Hub seal, bearing, spindle nut, cotter pin, bottle-cap retainer, installation tools, or additional hardware unless separately stated |
