Reliance 30BC02J30X Annular Ball Bearing

Product Detailed Description

• Function: This bearing facilitates smooth, low-friction rotation of a shaft within a housing. It supports the radial load (perpendicular to the shaft) and can also handle some axial (thrust) loads (along the shaft). In an electric motor, it enables the rotor to spin freely within the stator.

• Design: As an "annular" ball bearing, it features an inner ring, an outer ring, a set of balls, and a cage (or retainer) to keep the balls spaced evenly. The surfaces of the rings where the balls roll are precisely ground to minimize friction and ensure smooth operation.

• Application within Motors: The 30BC02J30X is commonly found as the Opposite Drive End (ODE) bearing in various Reliance Electric Duty Master AC and DC motors. For instance, it's listed as the ODE bearing for a 7.5 HP Duty Master XE Motor (X213TC frame) and a 1 HP Duty Master Motor (L182T frame), among others. The Drive End (DE) bearing often has a slightly different specification (e.g., 40BC02J30X).

• Durability: Bearings are critical for the longevity and performance of electric motors. Industrial-grade ball bearings like this are designed for durability and long service life under typical operating conditions.

Product Parameters

Given that this is a specific ball bearing, the parameters relate to its physical dimensions and load ratings. Based on common ball bearing classifications and some cross-references found:

• Type: Annular Ball Bearing

• Basic Design: Cylindrical device where inner or outer ring turns upon a single or double row of hardened balls.

• National Stock Number (NSN): 3110-01-480-9149 (This indicates it's also a standardized part used in military/government applications, suggesting a common industrial size).

• Approximate Dimensions (Based on NSN cross-references for similar bearings):

• Bore Diameter: Often around 60.0 mm nominal.

• Overall Outside Diameter: Often around 130.0 mm nominal.

• Overall Width: Often around 31.0 mm nominal.

• (Note: These are general approximations based on common NSN specifications for similar bearings. Exact dimensions would need to be verified from an official Reliance Electric part drawing or bearing specification document for the 30BC02J30X itself.)

• Material: Typically high-carbon chromium steel for rings and balls, with a cage made of pressed steel, brass, or polyamide.

• Tolerance Class: (Not explicitly stated in publicly available info for this specific part number, but typical for industrial bearings would be ABEC 1, 3, or 5).

• Internal Clearance: (Often C3 or C4 for motor applications, allowing for thermal expansion and high speeds).

• Lubrication: Typically pre-lubricated with grease and sealed (indicated by "J" or similar in part number if sealed, though "J" often indicates a specific bore tolerance). If not sealed, it requires external lubrication.

Product Advantages

• Reduced Friction: Ball bearings significantly reduce friction between rotating and stationary parts, improving mechanical efficiency of the motor.

• Load Support: Capable of supporting both radial and moderate axial loads, which is essential for electric motor operation.

• Precision and Smooth Operation: Manufactured to tight tolerances, ensuring smooth, quiet, and precise rotation of the motor shaft.

• Durability and Longevity: Designed for extended operational life under the specified load and speed conditions of Reliance Electric motors.

• Standardized Component: Being an NSN-listed part implies a certain level of standardization and availability from various suppliers.

Precautions

• Proper Installation: Bearing installation requires specialized tools and techniques to avoid damage to the bearing itself or the motor shaft/housing. Improper installation is a leading cause of premature bearing failure.

• Cleanliness: Always work in a clean environment when handling bearings. Contaminants (dust, dirt, metal chips) can severely reduce bearing life.

• Lubrication: Ensure the bearing is properly lubricated. If it's a sealed bearing, do not attempt to relubricate unless specifically designed for it. If it's open, follow the motor manufacturer's lubrication schedule and use the specified grease/oil.

• Handling: Handle bearings carefully. Dropping or impacting a bearing can cause internal damage not visible externally.

• Storage: Store bearings in their original, sealed packaging in a dry, cool, and vibration-free environment to prevent contamination and corrosion.

• Vibration and Misalignment: Excessive vibration or misalignment in the motor assembly can drastically shorten bearing life.

• Temperature: Operate the motor and bearing within specified temperature limits. High temperatures can degrade lubrication and damage bearing components.

• Authenticity: When replacing, ensure you purchase a genuine or equivalent quality bearing from a reputable supplier, as counterfeit bearings are a risk.

Product Applications

The Reliance 30BC02J30X Annular Ball Bearing is primarily used as a critical internal component in:

• Reliance Electric AC Motors: Commonly found as the Opposite Drive End (ODE) bearing in various Duty Master series motors (e.g., XE, XEX, etc.) across different horsepower and frame sizes.

• Reliance Electric DC Motors: Also utilized in some Reliance DC motor models as a key bearing.

• General Industrial Electric Motors: While specific to Reliance Electric's part numbering, the bearing's underlying dimensions and type are common in electric motors across various industries.

In essence, its application is wherever a Reliance Electric motor is used, which spans numerous industries:

• Manufacturing: Powering machinery like pumps, fans, compressors, conveyors, mixers, and machine tools.

• Pulp & Paper: Motors for paper machines, pumps, and chippers.

• Metals: Motors for rolling mills, cranes, and processing lines.

• Mining: Motors for conveyors, crushers, and pumps.

• Water & Wastewater: Motors for pumps and agitators in treatment facilities.

• HVAC: Motors for large air handlers and chillers.

• Oil & Gas: Motors for pumps, compressors, and drilling equipment.

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