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45X55X8 R21
Seals
45X55X8 R21
Seals
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
Price Match Promise
Found it cheaper elsewhere? We’ll match any UK competitor’s price on bearings in stock — call us before you buy.
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
Price Match Promise
Found it cheaper elsewhere? We’ll match any UK competitor’s price on bearings in stock — call us before you buy.
Technical Dimensions & Load Ratings
Confirm these values match your shaft, housing and application requirements before ordering.
Dimensions
| Bore Diameter (d) | 45mm |
| Outer Diameter (D) | 55mm |
| Width (B) | 8mm |
45X55X8 R21
Seals
Technical Specifications
| Part Number | 45X55X8 R21 |
| Brand | Unclassified |
| Bearing Type | Seals |
| Seal Type | Open |
| Material | Chrome Steel (SAE 52100) |
| Bore (Inner Diameter) | 45 mm |
| Outer Diameter | 55 mm |
| Width / Thickness | 8 mm |
Enquire About the Unclassified 45X55X8 R21
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Technical Datasheet
Download full specifications for 45X55X8 R21 — dimensions, load ratings, and material data.
Engineering support
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About the Unclassified 45X55X8 R21
The Unclassified 45X55X8 R21, is a seals, in an open configuration for maximum speed and easy relubrication, featuring a 45mm bore, 55mm outer diameter, and 8mm width, manufactured from chrome steel (sae 52100), and is in stock at Buy Bearings.
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
Key Specifications
The 45X55X8 R21 seals is specified with 45mm bore (inner diameter), 55mm outer diameter, 8mm width. The Open sealing arrangement protects against contamination and retains lubricant for extended service life. The chrome steel (sae 52100) construction provides excellent wear resistance and durability in demanding operating conditions.
Common Applications
Sealss are commonly used in:
Why Buy the 45X55X8 R21 from Buy Bearings?
- UK-authorised distributor with genuine Unclassified products
- Expert technical support from our engineering team
- Competitive pricing with fast UK dispatch
- Full technical datasheet and cross-reference support
- 30-day returns on standard products
Frequently Asked Questions
What is a 45X55X8 R21 bearing?
The 45X55X8 R21 is a Unclassified Seals with a 45mm bore, 55mm outer diameter and 8mm width. It is In Stock at Buy Bearings.
What are the 45X55X8 R21 dimensions?
The 45X55X8 R21 measures 45mm bore (inner diameter) × 55mm outer diameter × 8mm width.
What does Open mean on a bearing?
Open bearings have no seals or shields, allowing maximum speed and easy relubrication — best for clean, lubricated environments.
Is the 45X55X8 R21 in stock?
The 45X55X8 R21 is In Stock at Buy Bearings. Submit an enquiry or call our sales team for current stock and pricing (POA).
Related & Compatible Bearings
Same seals, closest dimensions first — useful if you need a slightly different size or this part is unavailable.
Related Parts — Seals & Bushings
Matching seals and bushings for 45mm shaft diameter — complementary components for your bearing.