OverviewTimken offers a wide range of housed units designed to improve productivity and uptime across various industries. These include ball
bearing housed units, tapered
roller bearing Type E housed units, spherical roller bearing solid-block housed units, SAF split-block housed units, and SNT plummer blocks. The products are engineered for durability and reliability, capable of withstanding harsh environments and reducing maintenance costs.
Introduction
Timken's ball housed units are easy to install and offer flexible options, including different locking mechanisms and materials for exterior covers. They are suitable for agriculture, food processing, and conveyors. Type E housed units have advanced sealing and locking technologies to protect against contaminants, ideal for mining and cement industries. Spherical roller bearing solid-block housed units are robust and handle misalignment, suitable for heavy-duty applications in metals and mining.
Shelf Life and Storage
Timken provides guidelines for the shelf life and storage of grease-lubricated bearings and components, emphasizing the importance of maintaining products in their original packaging and following specific storage conditions to maximize shelf life.
How to Use the Catalog
The catalog assists in selecting the appropriate Timken housed units for specific applications, including dimensions, tolerances, and engineering sections. Timken products comply with ISO and ANSI/ABMA standards, with updates available online.
Disclaimer
The catalog provides analysis tools and data for product selection, but Timken emphasizes the need for validation of product suitability for specific applications. Products are sold under Timken's terms and conditions, including a limited warranty.
Shelf Life and Storage of Grease-Lubricated Bearings and Components
Timken advises against using products beyond their defined shelf life. Storage conditions should maintain temperatures between 0°C and 40°C, with humidity below 60%. Proper storage and handling are crucial to prevent corrosion and contamination.
Warnings and Cautions
Timken provides warnings to ensure safety and equipment integrity, such as avoiding excessive force during mounting and ensuring proper alignment. Operating temperatures should not exceed 121°C, and special care is needed in explosive environments.
Ball Bearing Housed Units
These units feature a wide-inner-ring ball bearing for enhanced shaft support and are available in various types and sizes. Timken recommends using Shaft Guarding Technology™ to prevent shaft damage.
Engineering Considerations
Timken provides guidance on bearing selection, considering factors like speed, load, and environmental conditions. Materials used in bearings are chosen for their resistance to temperature and corrosion.
Materials and Temperature Ranges
Timken outlines materials suitable for various operating temperatures, emphasizing dimensional stability and corrosion resistance.
Radial Ball Bearings
The document discusses the manufacturing and assembly of radial ball bearings, emphasizing the importance of internal clearance to absorb effects of press fitting and thermal expansion.
Single-Row Radial Contact Ball Bearings
The document provides a detailed table of acceptance limits for various Timken prefixes, indicating tolerances for different bore diameters.
Cages
Two types of cages are discussed: pressed-steel welded cages and molded-nylon finger-type cages, each suitable for different applications.
Lubrication
The document highlights the importance of selecting the right lubricant based on viscosity, crucial for bearing performance.
Speed Capability
The document outlines factors affecting the maximum operating speed of ball bearings, including temperature, bearing seals, and lubrication.
Lubricant Selection
The document emphasizes the role of lubricants in friction management and provides guidelines for relubrication intervals based on service conditions.
Single-Point and Centralized Multi-Point Lubricators
Timken offers G-Power, M-Power, and C-Power lubricators for periodic grease delivery to bearings and other components.
Oil and Lubrication Recommendations
To ensure proper lubrication, maintain the oil level to the top of the overflow cup. Use high-quality automotive or turbine oil with oxidation inhibitors.
Relubrication Guidelines
Periodic relubrication is necessary due to the nature of food-grade grease and corrosive environments.
Load Ratings and Life Calculations
Load ratings are based on ABMA standards but are enhanced for material and processing improvements.
Frequency Coefficients
Table A-9 lists frequency coefficients for predictive maintenance, helping determine bearing defect frequencies.
Mounting and Shaft Recommendations
For wide-inner-ring ball bearings, a minimum slip fit is recommended.
Specifications
The catalog lists various bearing models with detailed specifications, emphasizing the importance of selecting the correct shaft fit for optimal performance.
Installation Procedures
The document outlines step-by-step installation instructions for ball bearing housed units.
Standards and Recommendations
The catalog provides torque specifications for set screws and bolts, as well as shaft tolerance guidelines.
Selection Guide
A selection guide is included to assist in choosing the appropriate bearing type based on load, speed, temperature, and environmental conditions.
Key Features
The document describes wide-inner-ring ball bearings, designed for ease of mounting and maximum shaft support.
Design and Construction
The wide-inner-ring ball bearings are designed for easy mounting on straight shafts without the need for shoulders, locknuts, or adapters.
Installation Instructions
The document provides detailed installation instructions for bearings with self-locking collars.
Safety Warnings and Cautions
Warnings are included to highlight the risks of improper handling and maintenance.
Applications
The bearings are suitable for various applications, including HVAC systems, conveyors, industrial machinery, and food processing.
Conclusion
This catalog serves as a comprehensive guide for selecting and installing Timken® Ball Bearing Housed Units.
Self-Aligning Bearings
These bearings allow unrestricted self-alignment by enabling the inner ring to align squarely with the shaft and assembly.
Set Screw Industrial Series
This series incorporates Shaft Guarding Technology to reduce replacement time and prolong shaft life.
ER Industrial Series
Designed for applications requiring low-starting and running torque.
RA-RR Series
These bearings feature an extended inner-ring type with a self-locking collar and are factory-prelubricated.
GRA-RR Series
Similar to the RA-RR series, these bearings include a provision for relubrication.
Key Data
The document includes tables with detailed specifications for each bearing model.
Product Types
The document covers several series of bearings, such as GN-KRRB, GN-KLLB, SMN A and B types, and SMN-S series.
Design Features
Timken's housed units combine bearing, housing, seal, and locking systems into one device.
Applications
These bearings are suitable for a wide range of industries, including agriculture, food processing, and conveyor systems.
Ordering Information
Instructions for ordering specific bearing models are provided.
Key Data
Tables within the document list critical data such as static and dynamic load ratings.
Pillow Blocks
Pillow blocks are the most common type of mounted units, providing shaft support where the mounting surface is parallel to the shaft axis.
Flanged Cartridges
Flanged cartridges are used where a shaft passes through the machine frame at a right angle.
Cylindrical Cartridges
These cartridges provide shaft support where the shaft axis is perpendicular to a machined housing.
Take-Up Units
Take-up units are used for shaft adjustment and belt-tightening in conveyor applications.
Features and Benefits
Timken's ball bearing housed units feature a powder-coat finish to prevent corrosion.
Installation Instructions
Timken housed units come with a self-locking collar for easy mounting.
RAK, TAK, LAK Series
These pillow blocks are suitable for normal industrial loads and feature solid, flat feet for increased strength.
YAK Series
This series incorporates Shaft Guarding Technology to protect and prolong shaft life.
VAK Series
The VAK series combines an engineered housing with an RA-RR extended inner ring bearing.
SAK Series
The SAK series features a streamlined, rugged one-piece pillow block with an RAK housing.
Additional Notes
The document includes detailed tables with dimensions and load ratings for each unit type.
Concentric Collar Series
This series uses a concentric collar for shaft locking, providing self-alignment with a spherical outside diameter.
VCJT Series
Designed for restricted areas with two bolt holes, this series features GRA-RRB bearings with positive-contact seals.
YCJT Series
Similar to the YCJ series but with two bolts, this series includes GY-KRRB bearings with set screw locking.
SCJT Series
This series is similar to the SCJ type but uses two bolts.
FLCT Standard Series
These units provide sturdy shaft support in minimal space and cost.
RFC Industrial Piloted-Series
Designed for heavy loads, these cast-iron units feature R-seal bearings with a concentric-locking collar.
RC Series
Suitable for straight-bore housings, this series features a self-locking collar and spherical outside diameter for self-alignment.
Key Specifications
The document provides detailed dimensions, load ratings, and part numbers for each series.
Specifications
The catalog provides detailed specifications for each bearing unit, including shaft diameter, bolt size, shank dimensions, flange hole diameter, and radial load ratings.
Procedures
The document outlines the assembly requirements, noting that stampings must be ordered in pairs to assemble the bearings.
Standards and Recommendations
The catalog suggests shaft tolerances and provides guidelines for ordering.
Key Features
Non-relubricatable and relubricatable units with interchangeable dimensions.
Data Interpretation
Tables within the document provide comprehensive data on each unit's dimensions and load ratings.
NLTU and TU Frames
The NLTU frames are side-mounted and made of welded steel, while TU frames are top-mounted and made of cast iron.
RTU Industrial Series
These units feature self-aligning, wide-inner-ring ball bearings with self-locking collars.
YTU Industrial Series
Incorporates shaft guarding technology to reduce replacement time and prolong shaft life.
VTU Standard Series
Designed for conveyor belt applications, these units provide self-aligning, wide-inner-ring ball bearings with self-locking collars.
TTU Industrial Series
Similar to other series, these units are used in conveyor applications and feature self-aligning, wide-inner-ring ball bearings.
PS Series
The Survivor PS series features polymer housings and stainless-steel inserts for high corrosion resistance.
Key Features
All units are designed for efficient support of adjustable shafts and conveyor take-up pulleys.
Survivor PT Series
The Survivor PT series includes high-base and low-base pillow blocks, two-bolt and four-bolt flanged cartridges, and take-up units.
Material and Design
The polymer housing resists a broad range of acids, alkalis, steam, and temperatures up to 121°C (250°F) continuously.
Performance
The units are dimensionally stable under load and feature Timken's proprietary thin-dense chrome coating on bearing inserts.
Ordering Information
To order Survivor polymer assemblies, replace the current cast-iron housed-unit designations with a 'K' prefix and add the 'PS' suffix.
Applications
The Survivor PT series is suitable for materials handling, dairy, refrigeration, HVAC, chemical, and maritime applications.
Key Features- Corrosion-resistant polymer housing
- Stainless-steel components
- FDA-approved grease
- High resistance to chemicals and temperature
- Interchangeable with Timken cast-iron units
Survivor NT Series
This series offers enhanced corrosion resistance and durability, suitable for highly corrosive environments such as food and beverage industries.
Applications
The housed units are designed for use in various industries, including food and beverage, dairy, refrigeration, HVAC, chemical, and maritime applications.
Ordering Information
The catalog provides guidance on ordering complete assemblies and individual components.
Specifications
The units come in a variety of configurations and shaft sizes, designed to handle the heaviest loads.
Performance Ratings
The document lists static and dynamic load ratings, speed ratings, and specific bearing and collar numbers for various shaft diameters.
Idler Pulley Units
These units combine a pressed-steel pulley with a Timken® precision ball bearing and rubber seals.
Replacement Bearings
The document outlines various replacement bearing assemblies, detailing features such as non-relubricatable and relubricatable options.
Key Features
The units are designed for durability and efficiency, with features like stainless-steel lock collars, industrial-duty seals, and compatibility with food processing environments.
Machine Units
The document describes A-type and B-type machine units, which include components like wide inner rings, sealing caps, retaining wires, and self-locking collars.
Installation Procedures
The catalog outlines the installation steps for Timken safety end caps.
Ordering Information
The document provides ordering information for safety end cap kits.
Index
An extensive index is included, covering various series and types of ball bearing housed units.