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NEEDLE ROLLER BEARINGS_2010

NEEDLE ROLLER BEARINGS_2010

Product catalog summary

Overview: The catalog provides comprehensive information on Koyo Needle Roller Bearings, emphasizing their application in automotive, aerospace, and industrial equipment sectors. It highlights the bearings' role in energy saving and environmental conservation.

Technical Specifications: Various types of needle roller bearings are detailed, including needle roller and cage assemblies, drawn cup needle roller bearings, machined ring needle roller bearings, and needle roller thrust bearings. Key characteristics such as load capacity, speed limits, and structural features are described.

Bearing Selection: A systematic approach to selecting the appropriate bearing is outlined, considering factors like installation space, load magnitude, rotational speed, and running accuracy. Guidance on bearing dimensions, fit, internal clearance, and lubrication requirements is provided.

Service Life and Load Rating: The document explains how to calculate bearing service life and load ratings, including basic and corrected rating life, dynamic and static load ratings, and recommended service life for various applications.

Handling and Maintenance: Instructions for handling, mounting, and dismounting bearings are provided, along with guidelines for lubrication and sealing devices. Proper maintenance is emphasized to ensure optimal performance and longevity.

Applications and Examples: Examples of bearing applications in different machinery, such as motorcycles, passenger cars, and industrial equipment, demonstrate the versatility and adaptability of needle roller bearings.

Supplementary Information: Additional tables provide data on shaft and housing tolerances, conversion factors, and material specifications, aiding in the precise selection and application of bearings.

Specifications and Selection: The document outlines the process of selecting bearings based on pre-determined installation space and machine operating conditions. Internal specifications such as bearing tolerance, internal clearance, and lubricant are chosen according to the application.

Bearing Service Life and Load Rating: The service life of a bearing is defined by the number of rotations until material fatigue causes flaking. The basic rating life is the number of revolutions until 90% of bearings remain without flaking. Factors such as wear, seizure, and improper lubrication can affect bearing life.

Calculation of Service Life: Equations for calculating the basic rating life (L10) and corrected rating life (Lna) are provided, considering factors like reliability, bearing characteristics, and operating conditions.

Correction of Basic Dynamic Load Rating: The dynamic load rating is affected by operating temperature and bearing hardness. High temperatures can reduce material hardness, necessitating a correction of the dynamic load rating using temperature coefficients.

Basic Static Load Rating: This rating considers the static load that causes permanent deformation at the contact center between the raceway and rolling elements.

Applications and Recommended Bearing Service Life: Recommended service life for various applications is provided, emphasizing that longer service life does not always equate to economical operation.

Bearing Load: Bearings are subjected to dynamic and static equivalent loads, which are theoretical loads that simulate actual operating conditions.

Belt and Gear Load Calculations: The document outlines the calculation of loads on pulley shafts and gear systems, including tangential, radial, and axial loads.

Load Coefficient and Mean Dynamic Equivalent Load: Machines experience vibrations and impacts, necessitating the use of a load coefficient to adjust calculated loads.

Limiting Speed: The limiting speed of a bearing is the maximum speed at which it can operate without excessive heat generation.

Shaft and Housing Specifications: Specifications for shafts and housings include accuracy, roughness, and material requirements.

Fit Selection and Stress Considerations: Proper fit selection is crucial to prevent detrimental sliding and ensure bearing performance.

Specifications and Parameters: Detailed specifications for roller bearings are provided, including dimensions and material considerations.

Clearance: Clearance in bearings is defined as the space between the bearing ring and rolling elements.

Lubrication and Sealing Devices: Lubrication is crucial for bearing performance, affecting friction, wear, and heat dissipation.

Grease Lubrication: Grease is categorized by its base oil, thickener, and additives.

Oil Lubrication: Oil lubrication is preferred for its mechanical and chemical stability.

Replenishment and Replacement of Grease: Methods for replenishing and replacing grease are discussed.

Handling of Bearings: Bearings require careful handling due to their precision.

Bearing Mounting: Proper mounting procedures are crucial to avoid damage.

Force Necessary for Press Fit and Removal: Formulas for calculating the force required for press fitting and removal of bearings are provided.

Test Run: A trial operation ensures proper bearing mounting.

Bearing Dismounting: Careful handling is essential during dismounting to avoid damage.

Cleaning: Needle roller bearings should be cleaned with neutral water-free light oil or kerosene.

Examples of Bearing Failures: Various bearing failures are outlined, including flaking, cracking, and wear.

Needle Roller and Cage Assemblies: Koyo needle roller and cage assemblies are designed for accurate roller guidance.

Specifications: Detailed specifications for polyamide molded cage needle roller bearings are provided.

Dimensional Data: Various dimensions and tolerances for needle roller bearings are provided.

Machined Ring Needle Roller Bearings: The Koyo machined ring needle roller bearings are described.

Shaft and Housing Specifications: Specifications for shafts and housings are detailed.

Tolerances: Tolerances for machined ring needle roller bearings are specified.

Fits: Guidelines for fitting bearings onto shafts or housings are provided.

Clearance: Clearance selection before mounting is discussed.

Tolerances for Races: Tolerances are specified for bore and outside diameters.

Tolerances for Non-separable Needle Roller Thrust Bearings: Specifications for various types of needle roller thrust bearings are provided.

Stud Type Track Rollers (Cam Followers): Various types of stud type track rollers are available.

Specifications: Detailed specifications for stud type track rollers are provided.

Mounting Instructions: Instructions for mounting stud type track rollers are provided.

Accessories: Accessories for metric and inch series are listed.

Special Specifications: Stud type track rollers with hexagonal holes are available.

Track Capacity: Track capacity is defined as the maximum load without deformation of track surfaces.

Tables and Data: Several tables detailing dimensions, load ratings, and track capacities are included.

Notes: Additional notes on track rollers and service life calculations are provided.

Overview: This document provides detailed specifications, tolerances, lubrication guidelines, fitting instructions, and track capacity information for Koyo yoke type track rollers and needle rollers.

1. Bearing Specifications: The document outlines the type codes for yoke type track rollers.

2. Tolerances: Tolerances for both inner and outer rings are provided.

3. Lubrication: Track rollers with seals are pre-filled with high-quality grease.

4. Fits and Mounting Instructions: Recommendations for fitting track rollers to shafts are given.

5. Track Capacity: Track capacity is defined as the maximum load without deformation.

6. Needle Rollers: Specifications for Koyo needle rollers are provided.

7. Other Products: Additional products such as needle roller and cage assemblies for high-speed planetary gears are described.

Overview: This document provides a comprehensive list of global offices, manufacturing plants, and technical centers associated with JTEKT and KOYO.

Global Offices: The document lists numerous offices across continents.

Manufacturing Plants: Several manufacturing plants are highlighted.

Technical Centers: Technical centers are located in the USA, China, and the Netherlands.

Environmental Commitment: The document notes the catalog is printed on recycled paper using soy ink.

Product Focus: The document specifically mentions needle roller bearings.

Catalog excerpts

NEEDLE ROLLER BEARINGS • General Bearings • NEEDLE ROLLER BEARINGS NEEDLE ROLLER BEARINGS This catalog has been printed on paper of recycled paper pulp using environmentally friendly soy ink. CAT. NO. B2003E Printed in Japan '08.10-1CDS

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Technical section RS R RP RV V VS VP VPS WR WRS BTM BHTM BT BHT RNA49 RNA59 BKM NQ NQS BFNM RNA69 WV RE R...P UR...P VE VS...P BE Needle roller and cage assemblies WRP MKM MHKM MK MHK NA49 NA59 BM BHM B BH NQI NQIS Needle roller and cage assemblies for use with connecting rods YM Y MM M MH Drawn cup needle roller bearings Machined ring needle roller bearings NA69 NA49...UU Inner rings for needle roller bearings IRM Needle roller thrust bearings TV TP CM...M CM...RM CR...M CYM...M CYM...RM LF W CM...UUM CM...UURM CR...UUM CYM...UUM CYM...UURM WS TPW...F TPWS...FF TPWWS...FF TVK... TPK... Stud...

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NEEDLE ROLLER BEARINGS Value & Technology

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Publication of New Needle Roller Bearing Catalog We are pleased to offer our new Koyo Needle Roller Bearing catalog to you. Needle roller bearings are being used in a wide range of machinery, such as automobiles, motor cycles, electric machines, aerospace equipment, machine tools, office and hydraulic equipment, and other general industrial machinery. In every field, new products are developed for saving of energy and conservation of environment, and needle roller bearings play a part in it. This thoroughly-revised catalogue includes the latest bearing types, models, and technical information....

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NEEDLE ROLLER BEARINGS Contents Technical section 1 Characteristics and types of needle roller bearings 8 Lubrication and sealing devices 8.1 Purpose of lubrication ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 21 1.1 Characteristics of needle roller bearings ⋅⋅⋅ 7 1.2 Characteristics of varied needle roller bearing types ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 7 1.3 Types of needle roller bearing ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 8 2 Outline of bearing selection ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 10 3 Bearing service life and load rating 3.1 Bearing service life ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 11 8.2 Lubricant ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅...

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Other products · Example of use · Supplementary tables Specification tables 11 Specification tables of needle roller bearings 12 Other products 1 Needle roller and cage assemblies ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ Single-row ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 40 44 Double-row ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 58 Needle roller and cage assemblies for use with connecting rods ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ Needle roller and cage assemblies for high-rotation speed planetary gears ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅ 182 Low torque needle roller and cage thrust assemblies ⋅⋅⋅ 183 Rocker Roller (bearing...

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1 Characteristics and types of needle roller bearings 1.1 Characteristics of needle roller bearings 1 Large Load Rating As compared with general ball and roller bearings, the Koyo needle roller bearings can ensure a large load rating in a small space, and can be used without inner rings or needle roller and cage assemblies so that the whole of the machine can be reduced in size and weight, thus making the design around the bearing more compact. 2 Small Cross-sectional Height Due to its small cross-sectional height, the bearing can fit in nearly the same space as the conventional plain bearing....

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1 Characteristics and types of needle roller bearings 1.3 Types of needle roller bearing Needle roller and cage assemblies For general use For use with connecting rods *For use at large end (for crank pin) Drawn cup needle roller bearings With cage Full complement type *Open ends type *Open ends type RS, R, RP BTM, BHTM BM, BHM BT, BHT BE B, BH RV, V, VS VE, VS...P YM Y VP, VPS Basic type *For use at small end (for piston pin) *Closed end type *Closed end type WR, WRS MKM, MHKM MM MK, MHK RE M, MH R...P WRP UR...P WV ( With synthetic resin ( With RFN ( With synthetic resin ( Miniature one-way...

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Machined ring needle roller bearings Without inner ring With inner ring Needle roller thrust bearings *Stud type (cam followers) *Stud type (cam followers) *Needle roller and cage assembly RNA49 NA49 RNA59 NA59 Track rollers Full complement type With cage CM...M TV KM...M CR...M TP *Race NQ NQI NQS NQIS CM...RM *Yoke type (roller followers) RNA69 NA69 *Yoke type (roller followers) CYM...M W KM...RM CXM...M CYM...RM CXM...RM WS *Combination type (separable type) TPW...F TPWS...FF TPWWS...FF ( With locating snap ring (outer ring) ( With pin hole (outer ring) ( With locating snap ring (outer ring)...

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