Roller Bearings for Machine Tools Precision Ball & Roller Bearings for Machine Tools Precision Ball & Roller Bearings for Machine Tools Precision Ball & Roller Bearings for Machine Tools CAT. NO. B2005E-1 Printed in Japan '11.06-5BDS ('06.09)

Ball & Roller Bearings Value & Technology

Precision Ball & Roller Bearings for Machine Tools Preface Thank you for your valuable support of KOYO products. Nowadays, there is a pressing demand in the industrial world for sophisticating machine tools in all aspects. Accordingly, ball & roller bearings for machine tools must be more compact and lightweight and exhibit such features as longer service life, higher performance, and higher reliability. This is made possible only through a wide range of high Under these circumstances, we have decided to publish this revised version of the KOYO catalog, Precision Ball & Roller Bearings for Machine...

CONTENTS I . Precision Ball & Roller Bearings Technical Descriptions Bearing Dimension Tables 1. Types and structures of precision ball & roller bearings for machine tools ····· 12 1. 2. Selection of bearings······················ 14 3. Selection of bearing types ··············· 15 4. Spindle bearing arrangements ········· 16 1. 2 Matched pair angular contact ball bearings····························· 54 5. Service life of bearings 1. 3 Composition of bearing numbers··· 55 Angular Contact Ball Bearings 1. 1 Types and features of angular contact ball bearings······ 53 5. 1 Rating life of bearings...

II. Oil / Air Lubrication System 4. Tapered Roller Bearings 4. 1 Types and features of tapered roller bearings ·············· 157 1. Oil / air lubricator ·························· 184 2. Air cleaning unit····························· 188 4. 2 Composition of bearing numbers ··· 157 4. 3 Tolerance of tapered roller bearings ·············· 158 III. Handling of Bearings 1. Handling and mounting of bearings ··· 192 4. 4 Axial load and displacement ······· 159 (Bearing Dimension Tables) ················ 160 5. Support Bearings and Support Bearing Units for Precision Ball Screws 5. 1 Structure and...

I. Precision Ball & Roller Bearings

CONTENTS Technical Descriptions 1. Types and structures of precision ball & roller bearings for machine tools ····· 12 2. Selection of bearings······················ 14 3. Selection of bearing types ··············· 15 4. Spindle bearing arrangements ········· 16 5. Service life of bearings 5. 1 Rating life of bearings ················ 18 5. 2 Service life calculation of bearings ······························· 18 I . Precision Ball & 5. 3 Dynamic equivalent loads ··········· 20 Roller Bearings 5. 4 Basic static load rating and static equivalent load ················· 23 5. 5 Service life of greases...

Precision Ball & Roller Technical Descriptions

I . Precision Ball & Roller Bearings 1. Types and structures of precision ball & roller bearings for machine tools Table 1. 1(1) Types and structures of precision ball & roller bearings for machine tools Bearing types Bearing series Angular contact ball bearings Some bearing series support Exhibits superb high-speed per- formance using an outer ring guided cage. performance are made through the use of balls that have a smaller diameter than standard bearing balls. Also, a large number of balls contributes to higher rigidity. Rolling elements are available in non-contact seal. Large-diameter balls...

Table 1. 1(2) Types and structures of precision ball & roller bearings for machine tools Bearing types Placed on the small tapered- bore diameter side of NN30K, or used together with NN30. Placed on the large tapered-bore angular contact thrust ball bearings Placed on the small tapered- bore diameter side of NNU49K, or used together with NNU49. Placed on the large tapered-bore pair-mounted angular contact ball bearings same bore and outside angular contact thrust ball They are placed on the small tapered-bore diameter side of Tapered roller bearings Nominal contact angles: greater Metric series...