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UJK pillow block bearings integrate a spherical outer ring ball bearing with a robust housing (cast iron or stamped steel), forming a pre-assembled unit. Designed for simplicity in installation and misalignment compensation (±1°-3°), they excel in applications with shaft deflection, housing inaccuracies, or harsh environments (e.g., mining, agriculture, conveyors). Key attributes include:
Self-Aligning Capability: Compensates for shaft/housing misalignment via a spherical outer ring seated in the housing's concave surface13.
Sealed & Lubricated for Life: Dual-lip seals (or triple-lip in advanced models) prevent contaminant ingress; pre-greased at the factory for maintenance-free operation310.
Mounting Versatility: Three fixation methods:
Set Screw Locking (UC/UB series): For moderate-vibration scenarios14.
Eccentric Collar (UEL/UE series): Resists rotation slippage in unidirectional drives37.
Tapered Adapter Sleeve (UK+H series): Handles high speeds/vibration with enhanced stability15.
UJK's range covers standard and heavy-duty variants. Below summarizes key series:
| Series | Fixation Method | Shaft Dia. (mm) | Housing Types | Dynamic Load (Cr) | Static Load (Cor) | Typical Applications |
|---|---|---|---|---|---|---|
| UC200/300 | Set screw | 15-90 | UCP (Pillow), UCF (Flange) | 12-220 kN | 6.5-235 kN | Conveyors, Fans19 |
| UK200/300+H | Tapered sleeve | 17-100 | UKP, UKK (Slider Block) | 18-585 kN | 9.5-1,500 kN | High-vibration machinery58 |
| UEL200/300 | Eccentric collar | 20-95 | UELP, UCT | 10-335 kN | 5.5-855 kN | Agricultural equipment37 |
| SB/SA Series | Light-duty set screw/eccentric | 17-40 | Stamped steel housings | 5.5-95 kN | 2.5-105 kN | Packaging, textile machines38 |
Notes:
Housing Compatibility: Includes square, diamond, circular, and slider-block designs for flexible mounting110.
Load Ratings: UC/UK series support moderate-to-heavy radial loads; axial loads ≤20% of radial capacity4.
Reduced Installation Complexity: Pre-assembled units eliminate alignment steps, cutting downtime by 30%610.
Enhanced Durability: High-carbon chromium steel (GCr15) rings + hardened cages withstand shock loads in mining/construction48.
Environmental Resistance: Triple-lip seals (optional) extend service life in dusty/wet conditions (e.g., farm machinery)310.
Speed & Temperature Limits:
Grease-lubricated: ≤3,000 rpm
Oil-lubricated: ≤4,500 rpm8
Material Handling: Conveyor rollers (UCP/UC series)19.
Agriculture: Harvesters, tillers (UEL/SA series for vibration damping)35.
Industrial Machinery: Pumps, compressors (UK+H series for high-speed stability)48.
Food/Pharma: Stainless steel variants resist corrosion in washdown environments6.
UJK bearings adhere to ISO 15:2011 for dimensional accuracy and ISO 15242-2 for vibration testing68. Custom solutions include:
Sealing Upgrades: Triple-lip seals for extreme particulates.
Material Options: Stainless steel (SS304/316) or coated housings for corrosion resistance10.
Global Compliance: Meets ANSI/ABMA and DIN 628 standards for cross-platform compatibility.
Why Choose UJK? → Simplified installation, uncompromised reliability in misaligned systems, and tailored solutions for heavy-industry challenges. For full catalogs (e.g., load tables, CAD models), contact UJK Engineering Support.
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