NNU4140K30/W33  OEM  Cylindrical Roller Bearings

Cylindrical Roller Thrust Bearings: Features, Full Models, Classification & Applications

Cylindrical roller thrust bearings are professional heavy-duty thrust bearings designed specifically for unidirectional axial loads. Adopting cylindrical roller rolling elements, they form line contact with raceways, delivering ultra-high axial load capacity and excellent operational stability. With diverse cage designs, optimized structural craftsmanship and multiple complete series specifications, these bearings feature high rigidity, low friction and easy installation. They are widely applied in mechanical equipment that requires heavy axial thrust bearing and precise axial positioning, serving as core components for industrial precision transmission and heavy-load support systems.

1. Core Structure

Cylindrical roller thrust bearings adopt a scientific and compact structural design, with every component optimized for heavy-load stability and long service life:

•High-Load Line Contact Structure: Equipped with high-precision cylindrical rollers as rolling elements, matched with precision-ground shaft washers and housing washers. The line contact between rollers and raceways effectively disperses axial pressure, greatly improving overall load capacity compared with traditional point-contact thrust bearings.

•Multiple Optional Cage Structures: Available with three mainstream cage types to adapt to different working conditions, including stamped steel cage, solid brass cage and polyamide cage. The cages can evenly separate cylindrical rollers, prevent roller skew and ensure stable continuous operation of the bearing.

•Optimized Anti-Stress Design: Adopts refined raceway curvature and professional roller profile design, which effectively reduces internal stress concentration during operation, alleviates component wear and significantly improves bearing fatigue life and durability.

•Quick Positioning Structure: Features a simple and integrated overall structure, optional with integrated locating ring design to realize fast positioning installation. The structure is convenient for on-site assembly, disassembly and daily maintenance.

2. Key Bearing Features

With professional structural advantages, cylindrical roller thrust bearings possess irreplaceable performance in heavy axial thrust working conditions:

•Superior Unidirectional Axial Load Capacity: Designed exclusively for bearing large unidirectional axial thrust loads, with no radial load bearing capacity. It perfectly meets the load demand of heavy-thrust industrial equipment.

•Ultra-High Axial Rigidity: Produces tiny deformation under rated heavy load, can provide accurate and stable axial positioning for rotating shafts, effectively avoiding shaft floating and positioning deviation.

•Stable Medium and High-Speed Operation: Optimized internal fit structure reduces friction torque effectively, with low heat generation and smooth rotation, supporting long-term continuous medium and high-speed operation.

•Simple & Easy Maintenance: Standardized modular structure ensures convenient installation, disassembly and replacement. The optional integrated locating ring further improves installation efficiency for various assembly scenarios.

3. Complete Classification & Full Product Models

Cylindrical roller thrust bearings are classified by row quantity, structural type, standard series and cage material, covering full-size industrial specifications from miniature to extra-large. Below is a complete list of mainstream standard models, hot-selling specifications and differentiated functional models for your precise selection:

3.1 Product Classification

•By Row Number: Single-row cylindrical roller thrust bearings, Double-row cylindrical roller thrust bearings

•By Structure Type: Open type cylindrical roller thrust bearings, Shielded type cylindrical roller thrust bearings

•By Standard Series: 81100 lightweight series, 81200 medium-load series, 89300 heavy-duty double-row series, 89400 ultra-heavy double-row series

•By Cage Material: Stamped steel cage, Solid brass cage, Polyamide plastic cage

3.2 Full-Series Mainstream Bearing Models

81100 Series | Single-Row Lightweight High-Speed Type

Thin-wall lightweight structure, low friction, suitable for limited installation space and medium axial load high-speed equipment.

Complete Standard Models: 81100, 81101, 81102, 81103, 81104, 81105, 81106, 81107, 81108, 81109, 81110, 81111, 81112, 81113, 81114, 81115, 81116, 81118, 81120, 81122, 81124, 81126, 81128, 81130

Functional Suffix Models: Steel cage (E): 81106E, 81108E, 81110E, 81112E; Brass cage (M): 81106M, 81108M, 81110M; Plastic cage (P): 81108P, 81110P; Shielded type (Z): 81108-Z, 81110-Z, 81112-Z

81200 Series | Single-Row Medium-Load Universal Type

Enhanced load-bearing structure, the most versatile series for general industrial medium and heavy axial thrust conditions.

Complete Standard Models: 81204, 81205, 81206, 81207, 81208, 81209, 81210, 81211, 81212, 81213, 81214, 81215, 81216, 81218, 81220, 81222, 81224, 81226, 81228, 81230

Functional Suffix Models: Steel cage (E): 81208E, 81210E, 81212E, 81216E; Brass enhanced cage (EM): 81210EM, 81212EM; Low-noise plastic cage (P): 81210P, 81212P; Dust-proof shielded type (2Z): 81210-2Z, 81212-2Z, 81216-2Z

89300 Series | Double-Row Heavy-Duty Enhanced Type

Double-row roller design with doubled rigidity and load capacity, suitable for long-term heavy-load and impact load working conditions.

Complete Standard Models: 89305, 89306, 89307, 89308, 89309, 89310, 89312, 89314, 89316, 89318, 89320, 89322, 89324, 89326, 89328, 89330

Functional Suffix Models: Impact-resistant steel cage (E): 89310E, 89312E, 89316E; High-temperature brass cage (M): 89310M, 89312M; Harsh environment shielded type: 89312-Z, 89314-Z, 89318-Z

89400 Series | Double-Row Ultra-Heavy Industrial Type

Super heavy-load series with ultimate axial bearing capacity, specially customized for mining, metallurgy and large lifting equipment.

Complete Standard Models: 89406, 89408, 89410, 89412, 89414, 89416, 89418, 89420, 89422, 89424, 89426, 89428, 89430, 89432, 89434, 89436

Functional Suffix Models: Heavy-duty brass cage (EM): 89412EM, 89416EM, 89420EM; High-strength steel cage (E): 89414E, 89418E; Fully sealed shielded type (2Z): 89416-2Z, 89420-2Z, 89424-2Z

3.3 Precision & Special Custom Models

To meet high-end industrial precision demands, we provide customized special bearings, including P4/P5 high-precision grade, C3 large clearance vibration-resistant and extra-large non-standard models: Precision series: 81110P4, 81212P5, 89312P4, 89416P5; Large clearance series: 81210C3, 89312C3, 89416C3; Oversized custom models: 81135, 81235, 89335, 89440 and above non-standard specifications.

4. Wide Application Scope

Thanks to ultra-high axial load capacity, high positioning accuracy and stable high-speed operation performance, cylindrical roller thrust bearings are widely used in various industrial equipment requiring heavy axial load bearing and precise axial positioning. The main application scenarios cover machine tool spindles, ball screw drive systems, vertical motors, vertical water pumps, industrial gearboxes, hydraulic jacks, lifting equipment, rolling mills and mining machinery, fully adapting to various heavy-load and high-precision transmission working conditions.

5. Product Advantages

All our cylindrical roller thrust bearings are manufactured with high-purity bearing steel and precision grinding technology, with optimized roller and raceway structure to eliminate stress concentration. All standard models comply with international ISO standards, featuring full interchangeability, easy installation and stable performance. With diverse cage materials and structural types, our bearings can adapt to high-speed, high-temperature, dusty and heavy-impact harsh working environments. With complete model specifications, high rigidity, low friction and long service life, our products provide reliable and cost-effective axial load support solutions for global industrial equipment.