UC206-17 1-1/16X2.4409X1.5000X0.7480 Insert Bearing Setscrew Locking for Textile Machinery

UJK Spherical Outer Diamode Bearing Inserts: A Comprehensive Product Line Overview

UJK spherical outer diameter bearing inserts are premium-grade, self-aligning bearing units engineered for reliability and durability in the most demanding industrial applications. These inserts form the core component of housed bearing units, combining a deep groove ball bearing with a spherical outer surface. This design allows them to handle significant radial loads and moderate axial loads while automatically compensating for static shaft misalignment, protecting machinery from premature wear and failure.

The UJK product line is comprehensive, offering a variety of series to meet specific mounting, sealing, and performance requirements. Key series include UC, SA/SB, CS, JA/JB, and UK.

Key Features & Design Advantages:

• Superior Self-Alignment: The spherical outer surface rotates within a matching spherical housing bore, automatically correcting for shaft misalignment (up to ±3°), preventing binding and reducing stress.

• Robust Construction: Manufactured from high-carbon chromium steel under strict quality control, ensuring high load capacity, extended service life, and consistent performance.

• Advanced Sealing Technology: Most series feature triple-lip contact seals made from nitrile rubber (NBR), effectively retaining grease and excluding contaminants like dust, dirt, and moisture.

• Interchangeability: Designed to international standard dimensions (e.g., ISO 11976), making UJK inserts fully interchangeable with other major brands, ensuring easy replacement and sourcing flexibility.

Detailed Series Breakdown:

1. UC Series (Set Screw Locking - The Standard Choice)

• Locking Method: Extended inner ring with set screws for direct mounting onto a solid shaft.

• Features: This is the most common and economical type. The set screws lock the bearing firmly onto the shaft. The inner ring extension provides ample space for secure locking.

• Applications: Universal use in conveyor systems, agricultural machinery, and industrial drives where solid shafts are used.

2. SA & SB Series (Eccentric Collar Locking - Secure Grip)

• Locking Method: Uses an eccentric locking collar (or cam collar) that is seated on an adapter sleeve. Tightening the collar creates a powerful clamping force on the shaft.

• Features: Provides a more secure and vibration-resistant grip than set screws, especially on hollow shafts or where rotational direction changes. The SA series typically denotes a wider inner ring or specific seal variant.

• Applications: Ideal for high-vibration environments, heavy-duty applications, and on hollow shafts (e.g., fans, textile machinery).

3. CS Series (Tapered Adapter Sleeve Locking - Heavy Duty)

• Locking Method: Utilizes a tapered adapter sleeve and a locknut for mounting. As the nut is tightened, the sleeve compresses onto the shaft.

• Features: This method offers the strongest and most reliable locking mechanism, capable of handling very high loads and extreme vibrations. It is the preferred choice for the most demanding applications.

• Applications: Heavy-duty conveyors, crushers, large fans, and mining equipment.

4. JA & JB Series (Spherical Outer Diameter - Specific Configurations)

• Locking Method: These codes often refer to specific internal designs or sealing arrangements within the standard locking methods (e.g., set screw or collar). For example, a specific lip seal configuration might be denoted by a "JA" or "JB" suffix.

• Features: They maintain the standard spherical outer diameter and self-aligning feature but may have optimized internal clearances or seal designs for particular operating conditions.

• Applications: Used where specific performance characteristics beyond the standard UC/SA are required.

5. UK Series (Special Sealing & Material Options)

• Locking Method: Typically uses set screw or collar locking.

• Features: The "UK" designation often signifies special features, which can include:

  • Stainless Steel Construction: Made from SS304 or SS316 stainless steel for excellent corrosion resistance in food, beverage, chemical, and marine applications.

  • Special Seals: Enhanced sealing options (e.g.,  seals for high-temperature or chemical resistance) may also be part of this series.

• Applications: Food processing, pharmaceutical, chemical processing, and washdown environments.