The 6004 bearing is a crucial component in countless mechanical applications, known for its compact size, versatility, and dependable performance. In this guide, we’ll explore the technical specifications, dimensions, interchange numbers, sealing solutions, and real-world uses of the 6004 bearing—especially in snowmobiles. Whether you’re a distributor, technician, or end-user, this article will help you understand why the 6004 is a top choice in the bearing world.
6004 Bearing Technical Details
The 6004 bearing belongs to the 6000 series of deep groove ball bearings. It’s a single-row configuration, designed to handle both radial and moderate axial loads. Thanks to its design, it is also capable of operating at high speeds with minimal noise and vibration.
Key specifications:
Type: Deep groove ball bearing
Inner Diameter (ID): 20 mm
Outer Diameter (OD): 42 mm
Width: 12 mm
Dynamic Load Rating: Around 9.4 kN
Static Load Rating: Around 5 kN
Limiting Speed (open type): Up to 19,000 rpm
Material: Typically made from high-grade bearing steel (e.g., GCr15/Chrome steel)
This design provides high load-carrying capacity relative to its size, making it ideal for space-constrained applications.
What Size is a 6004 Bearing?
The standardized size of the 6004 bearing is:
ID：20 mm inner diameter
OD: 42 mm outer diameter
Width: 12 mm width
Its compact yet sturdy form allows it to fit into small assemblies without sacrificing strength or performance. These measurements are consistent regardless of the manufacturer, ensuring interchangeability and ease of replacement.
6004 Bearing Interchange Number
One of the advantages of the 6004 bearing is its wide compatibility. It’s a globally standardized item, and multiple manufacturers produce equivalents under their own catalog numbers. Here are typical interchange designations for the 6004 bearing:
SKF: 6004
NSK: 6004
NTN: 6004
FAG: 6004
FEDERAL: 9104
HOOVER: 104
ISO SERIES. 6004
These numbers refer to the same core design and dimensions. The only variation may come in the suffixes that define features like sealing type (ZZ, 2RS), clearance (C3), or material coatings.
6004 Bearing Sealing Solutions
The 6004 bearing comes in various sealing options to suit different environmental conditions and operational requirements. Here’s a quick overview:
Open type (6004): No shields or seals. Ideal for clean environments with external lubrication.
Metal Shielded (6004ZZ): Shielded on both sides with metal covers. Protects from larger particles while allowing for high-speed operation.
Rubber Sealed (6004-2RS): Rubber seals on both sides. Excellent protection against dust, water, and small particles. Recommended for humid or contaminated environments.
Choosing the right sealing option is key to maximizing the bearing’s life. For example, snowmobile applications benefit greatly from sealed types due to exposure to snow, slush, and dirt.
What is a 6004 Bearing Used For?
The 6004 is one of the most versatile bearings on the market and finds use across many industries. Below are some of the most common applications:
1. Automotive and Powersports
Alternators
Electric starters
Wheel hubs
Gearboxes
Snowmobiles (especially the 6004-2RK bearing )
2. Industrial Machinery
Electric motors
Pumps
Fans and blowers
Conveyor rollers
3. Household Appliances
Washing machines
Vacuum cleaners
Air conditioners
4. Power Tools
Drills
Sanders
Grinders
5. Snowmobile Applications (6004-XX 10-Pack Bearing Sets)
In snowmobiles, the 6004 bearing is commonly used in the track drive system, chaincase, jackshaft, and idler wheels. It must withstand:
Extreme cold
High rotational speeds
Water and ice contamination
Shock loads from rough terrain
When sold in 10-pack sets, the 6004-2RK bearing becomes an economical option for dealers and repair shops, allowing quick replacement of worn-out bearings during seasonal overhauls. For snowmobiles, the rubber-sealed (2RS) version is often preferred for its better sealing in snowy, wet conditions.
Benefits for snowmobiles include:
Smooth rotation at high speed
Improved drivetrain efficiency
Lower maintenance with pre-lubricated sealed units
Excellent corrosion resistance with rubber seals
Why Choose BYWB 6004 Bearings?
BYWB offers a competitive and quality-driven option for 6004 bearings with benefits such as:
Precision-machined raceways for smoother operation
Durable rubber seals (2RS) or metal shields (ZZ) depending on your need
Pre-lubricated for long life and minimal maintenance
Reliable steel cages and heat-treated steel rings
Cost-effective 10-pack kits ideal for workshops and maintenance centers
Whether you’re maintaining an industrial motor, fixing a snowmobile, or assembling an appliance, BYWB’s 6004 bearings offer the performance and durability you can count on.
Conclusion
The 6004 bearing is a staple across countless industries and applications. Its compact size (20x42x12 mm), load-carrying ability, and versatility make it a go-to solution for engineers, mechanics, and OEMs alike. With various sealing options and a universal size standard, the 6004 is easy to source, install, and maintain.
Especially in rugged conditions like snowmobile use, a good-quality 6004 bearing—such as BYWB’s 6004-2RK bearing—can make a significant difference in performance and longevity. Whether you’re purchasing single units or a 10-pack for fleet service, investing in premium bearings ensures smooth operation and peace of mind.
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Very helpful 6004 deep groove ball bearing guide. The 20×42×12 mm size specs, the ZZ vs. 2RS sealing comparison, and the snowmobile application tips answered exactly what I needed before reordering. Thanks for sharing!