6304-2Z/C3 GJN

• 6304: Basic model number denoting a medium series, single row deep groove ball bearing with a 20mm bore and 52mm outside diameter.
• 2Z: Designates non-contact shields on both sides. This provides effective protection against contamination while minimizing friction, allowing for high rotational speeds.
• C3: Indicates a greater than normal radial internal clearance. This is critical for applications involving thermal expansion, heavy interference fits, or where a slight reduction in precision is acceptable for enhanced operational reliability.
• GJN: Specifies the use of a high-quality, polyurea-thickened grease with a standard filling quantity. This pre-lubrication ensures long-term, maintenance-free operation across the specified temperature range.

The bearing's performance is defined by its precision construction. The use of chrome steel for all critical components (rings, balls, cage) ensures high durability and resistance to wear. The single row deep groove raceway is optimized for handling significant radial dynamic loads (3574 lbf). The shielded (2Z) design effectively seals the bearing from dust and other particulates without significantly increasing friction, contributing directly to its high limiting speed (14,000 rpm). The C3 clearance provides operational stability in environments with varying thermal conditions, preventing pre-load and potential seizure. Combined with the pre-applied GJN grease, this bearing offers a long service life with minimal maintenance requirements.

The 6304-2Z/C3 GJN is ideally suited for a wide range of industrial machinery and equipment, including:

• Electric Motors and Gearboxes
• Industrial Fans and Blowers
• Conveyor Systems
• Agricultural Machinery
• Material Handling Equipment

Its combination of speed capability, contamination protection, and operational reliability makes it a versatile choice for general industrial use.