HK Needle Roller Bearings HK2010 HK2210 HK2512 HK3012 HK3512 HK4012 HK4512 HK0408tn HK0608 HK0808 HK1412 HK1512 Used for Automotive Transmissions / Gearboxes

UJK HK Series Drawn Cup Needle Roller Bearings

The UJK HK Series offers high-performance, drawn cup needle roller bearings designed for applications demanding compact design and exceptional radial load capacity. Featuring a thin-walled, precision-drawn outer cup and a full complement of needle rollers guided by a robust cage, these bearings excel in space-constrained locations where high radial loads are present.

Key Features & Benefits:

1. Space-Saving Design: The thin-walled, deep-drawn outer cup minimizes radial space requirements.

2. High Radial Load Capacity: Engineered to handle significant radial loads within a minimal cross-section.

3. Caged Roller Design: The integral cage accurately spaces the needle rollers, prevents skewing, reduces friction, and ensures smooth operation at higher speeds compared to full-complement designs.

4. Cost-Effective: Efficient manufacturing of the drawn cup provides an excellent performance-to-cost ratio.

5. Versatile Applications: Ideal for a wide range of industries including automotive transmissions, gearboxes, power tools, industrial machinery, and agricultural equipment.

6. Simplified Assembly: The drawn cup simplifies housing design and bearing installation.

The UJK HK Series needle roller bearings provide a reliable and compact solution for transmitting radial loads efficiently in demanding environments, contributing to reduced overall system size and weight.

Key Terminology Explained:

• Drawn Cup: The outer ring is formed by deep drawing sheet steel, resulting in a thin-walled, seamless cup. (HK specifically denotes this open-ended, caged design).

• Needle Rollers: Long, thin cylindrical rollers providing a large load-carrying surface relative to their diameter.

• Cage (Retainer): A component that separates and guides the rollers, maintaining correct spacing.

• Radial Load: A load acting perpendicular to the bearing's axis of rotation.

• Full Complement: A bearing design without a cage, packing the maximum number of rollers (not used in the standard HK caged design).

• Skewing: Undesirable tilting or misalignment of rollers.

Stamped Outer Ring Needle Bearings (Space-saving, high load capacity)

1. TA Series (Heavy-Duty Perforated Type)

   • Features: Large OD, low cross-section, high load capacity (caged for high speed / full complement for heavy load).

   • Models:

     • TA2215: Bore 22mm, OD 29mm, Width 15mm (high-temp applications).

     • TA3530: Bore 35mm, OD 45mm, Width 30mm (low-speed heavy load).

     • Others: TA2120, TA2515, TA3020 (bore 8-50mm).

2. HK Series (Standard Perforated Type)

   • Features: Thin-walled, cost-effective, optional seals (suffix RS/2RS).

   • Models:

     • HK1616: Bore 16mm, OD 22mm, Width 16mm (general transmission).

     • HK1610: Width 10mm (compact spaces).

3. BK Series (Closed-End Type, One Side Sealed)

   • Features: One side closed, ideal for shaft-end sealing (dust/grease retention).

   • Models:

     • BK152120RS, BK1012: Temp. range -20°C~120°C, pre-lubricated.

4. BA Series (Miniature Inch-Sized)

   • Features: Ultra-compact, precision applications (e.g., throttle assembly).

   • Models:

     • BA45: Bore 1/4" (6.35mm), OD 7/16" (11.112mm), Width 5/16" (7.94mm).

II. Solid Ring Needle Bearings (Require matched shafts/housings)

1. K Series (Connecting Rod Bearings)

   • Application: Engine connecting rods (high shock loads).

   • Models:

     • K10x15x10: Bore 10mm, OD 15mm, Width 10mm (50-250cc engines).

2. NA/RNA Series (Solid Rings)

   • Features: With inner/outer rings, precision mounting.

III. Quick Reference Table

IV. Selection Guidelines

• High Speed: Caged TA/HK series (e.g., TA2215).

• Heavy Load/Shock: Full-complement TA or K series (e.g., TA3530, K10x15x10).

• Sealing Required: BK or HK-RS models.

• Customization: Non-standard sizes/materials (e.g., stainless steel) available from manufacturers.