61918
618 & 619 Series Thin Section Bearings
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Part No.
Part No.
61918
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.59 kg
Tolerance class
P6
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.015mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
7464 lbf
Radial static load rating
7081 lbf
Limiting speed
6.7 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 127.73
/ each
In Stock
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61918 Bearing Product Overview & Core Advantages
The 61918 metric ball bearing is a single row deep groove ball bearing designed for exceptional performance in high-precision applications. Engineered to primarily handle radial loads, this bearing features a P6 tolerance class for superior running accuracy and dimensional consistency. Its compact design, with a 90mm bore and 125mm outside diameter, makes it ideal for space-constrained assemblies requiring reliable, long-lasting operation. Manufactured from high-grade chrome steel and featuring a stainless steel cage, it delivers excellent durability and consistent performance.
61918 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 61918 | Standard designation for a single row deep groove ball bearing with a 90mm bore and 125mm OD. |
| Open (Seal Type) | No seals or shields, allowing for higher limiting speeds and optimal heat dissipation. Requires external sealing in contaminated environments. |
| P6 (Tolerance Class) | Denotes a precision bearing with tighter dimensional and running accuracy tolerances than standard (P0) grades. |
| CN (Radial Internal Clearance) | Standard normal clearance group, suitable for most common operating conditions and fits. |
61918 Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P6 tolerance class ensures minimal runout and precise shaft positioning, critical for applications demanding high rotational accuracy. The robust single row construction provides reliable radial support.
- Superior Load Capacity: With a dynamic load rating of 7464 lbf and a static load rating of 7081 lbf, this bearing is built to handle significant radial loads over an extended service life.
- Optimized for High Speed: The open design and stainless steel cage contribute to a high limiting speed of 6,700 rpm, reducing friction and heat generation.
- Durable Material Construction: Components made from chrome steel (rings and balls) and a stainless steel cage offer excellent resistance to wear and corrosion, enhancing overall bearing longevity.
- Versatile Operating Range: A wide temperature range from -30°C to 120°C allows for reliable operation in diverse environmental conditions.
61918 Bearing Typical Application Areas
This precision deep groove ball bearing is ideally suited for a wide range of demanding industrial applications, including:
- Electric Motors and Generators
- Precision Machine Tool Spindles
- Industrial Pumps and Compressors
- Material Handling Equipment
- Agricultural and Construction Machinery
- Automotive Components (e.g., transmissions, alternators)
