Inner: •25580/22520
Outer: •15123/15245
Built for reliability where it matters most, the Holroyd 2T bearing kit is engineered to keep heavy-duty trailers towing safely and smoothly under demanding conditions. Designed for durability and consistent performance, each kit includes precision-matched, high-quality bearing components to help reduce wear, improve reliability and support long-distance towing confidence.
✔ Designed for up to 2 tonne trailer applications
✔ Precision-matched bearings and seals for reliable fitment
✔ Helps reduce heat build-up and premature wear
✔ Ideal for caravans, plant trailers, horse floats and heavy-duty trailer setups
✔ Built to handle demanding Australian towing conditions
Bearing Kit Includes:
- Dust Cap
- Seal
- Inner and Outer Bearings
- Split Pin
Dimensions
Core Dimensions & Specifications
Bore Diameter (ID): 50MM
Outer Diameter (OD): 80MM
Width: 20MM (Cone width: 20MM, Cup width: 15.5MM)
Weight: approx 0.38KG
| Bearing Dimensions | ||
| Bore Diameter | 44.45 mm | |
| Outside Diameter | 82.931 mm | |
| Total Width | 23.812 mm | |
| Inner Ring Width | 25.4 mm | |
| Outer Ring Width | 19.05 mm | |
| Outer Ring Chamfer | 0.8 mm | |
| Inner Ring Chamfer | 3.5 mm | |
| Load Capacity Ratings | ||
| Cr | 94,000 N | Dynamic Load Rating |
| C0r | 99,000 N | Static Load Rating |
| Maximum Operating Speeds | ||
| Grease | 4,500 min⁻¹ | Grease Lubrication |
| Oil | 6,000 min⁻¹ | Oil-Bath Lubrication |
| Mounting & Fitment Dimensions | ||
| a | 17.6 mm | Effective Load Centre |
| da | 57 mm | Shaft Abutment Diameter |
| Da | 74 mm | Housing Abutment Diameter |
| db | 50 mm | Shaft Abutment Diameter |
| Db | 77 mm | Housing Abutment Diameter |
| ra (max.) | 3.5 mm | Inner Ring Fillet Radius |
| ra (max.) | 0.8 mm | Outer Ring Fillet Radius |
| Engineering Factors | ||
| e | 0.33 | Constant |
| Y0 | 0.99 | Axial Load Factor |
| Y1 | 1.8 | Axial Load Factor |
| Bearing Weight | ||
| Cone | 0.359 kg | Approximate Weight |
| Cup | 0.203 kg | Approximate Weight |
Performance & Ratings
Performance & Ratings
Dynamic Load Rating61,000 NCr
Static Load Rating87,000 NC0rReference Speed (Grease)4,300 r/minGrease Lubrication
Reference Speed (Oil)6,000 r/minOil-Bath Lubrication
Calculation Factore = 0.42Constan
tAxial Load FactorY₀ = 0.78Axial Load Factor
Axial Load FactorY₁ = 1.4Axial Load Factor
Key Design Features
Key Design Features
Separable Design: The bearing consists of two main separable parts, the “cone” (inner ring, cage, and rollers) and the “cup” (outer ring). This makes mounting and adjusting highly efficient.
Tapered Raceways: The conical shape creates a linear contact patch that allows it to absorb high-stress combined forces.
Paired Mounting: Because it is a single-row bearing, it must generally be mounted in a mirror-image arrangement (such as O, X or tandem configurations) alongside a second tapered roller bearing.
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