Precision Bearings ABEC-5 and ABEC-7 Tolerance …

1 Precision Bearings ABEC-5 and ABEC-7 Tolerance Grades1871900 RExtremely Light, ABEC-7 , Single Bearing1881900 RDExtremely Light, ABEC-7 , Duplex Set189100KR Extra Light, ABEC-7 , Single Bearing190100 KRD Extra Light, ABEC-7 , Duplex Set191200R Light, ABEC-7 , Single bearing 192200RD Light, ABEC-7 , Duplex Set193300R Medium, ABEC-7 , Single bearing 194300RD Medium, ABEC-7 , Duplex Set195200S Light, ABEC-5 , Woodworking Bearings 196300S Medium, ABEC-5 , Woodworking Bearings196XO-RBDJ Ball Screw Support Bearings197XO-RBDS Excello Bearings 199 SeriesSizePagePrecision ball Bearings in Tolerance grades ABEC-5 andABEC-7 are recommended for applications where highspeed and/or extreme running accuracy is Bearings have the same nominal externaldimensions as equivalent size ABEC-1 grade Bearings .

2 However, the running characteristics and externaldimensions are held to closer bearing envelope dimensions and tolerances shown in this catalog comply with standards established in the USA by the Annular bearing Engineers Committee(ABEC) of the American bearing ManufacturersAssociation (ABMA) (see Engineering section; page239). These standards have also been approved by the American Standard Association (ASA) and theInternational Standards Organization (ISO). This assuresthe bearing user of all the advantages of dimensionalstandardization.

3 However, dimensional interchangeabilityis not necessarily an indication of functionalinterchangeability. Other characteristics must also beconsidered such as cage type, internal clearance,contact angle, configuration of the bearing rings andother order to meet the running characteristic tolerancesspecified for Precision Bearings , it is necessary toassemble them with high Precision balls where the size,sphericity and other surface characteristics are held tovery close tolerances. Cages generally are of phenolic(bakelite) composition, which is well-suited for high-speed The Bearings are manufactured from vacuum-processed 52100 steel that can operate satisfactorily to 250 F (121 C).

4 This is well within the requirement of most machine tool BearingsPrecision ball Bearings are also duplex ground so theycan be used as a component in a pair of Bearings or in a bearing set (see Duplex Bearings section; page234). Duplex pairs (or sets of Bearings ) ordered as DB, DF, or DT (or in combinations), are tied together as they are to be and Identification Bearings are thoroughly cleaned immediately prior to packaging and are usually coated with a lightweightoil compatible with most machine lubricants.

5 Therefore, Bearings can be used as received without beingwashed, with the oil serving as a rust inhibitor. Single-row Bearings are packaged in hermetically sealedtransparent bags and placed in distinctive boxesidentified with the bearing number, Tolerance grade andother important bearing bearing ServicesPrecision 15 Angular Contact1900-R Extremely Light Series (Single Bearings )188 Precision 1900-R series angular contact ball bearingsare manufactured to meet dimensional and runningaccuracy to ABEC-7 tolerances.

6 They are suppliedwith an inner ring-centered phenolic cage designedto minimize centrifugal recommended mounting fits refer to Shaft and Housing Fits in Engineering Data equivalent load and life calculations see pages 116 and )NlbfBasic Radial Load RatingSpeed Rating3)StaticC0 NlbfGreaseOilRPMRPMF illet Radius1) 000 110 8801 1002 7006075500084 4001 2103 3602 1005 8501 3204100062 6101 7105 3001 1903700053 7502 1907 1001 6003200048 2002 5209 0002 0202500039 3003 21011 6002 6002300036 1003 40013 4003 0102100031 5004 38017 3003 9005 15020 4004 2005 44022 8005 7005 55024 0005 4001500022 2007 46032 5007 3001400021 5007 76034 5007 7601400020 5007 76036 0008 1001300019 90010 10046 50010 70011 80056 00012 6001200017 50010 70052 00011 7001100016

7 50013 20064 00014 4001000015 50013 60067 00015 1001000014 30012 40064 00014 4009 10016 70085 00019 1008 30012 40020 500106 00023 8007 60021 400110 00024 7007 40011 00028 200150 00033 7006 4009 00028 600156 00035 1006 0009 00029 800170 00038 3005 5008 00036 000212 00047 8005 1007 00039 100224 00050 4005 1007 00048 600275 00061 8004 6007 300 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will ) Rating for one million revolutions or 500 hours at 33 | )Values have been determined through historical application and practice.

8 For a more complete explanation, see pg. 15 Angular Contact 1900-RD Extremely Light SeriesDuplex189 Precision 1900-RD series angular contact ballbearings are manufactured to meet dimensional andrunning accuracy to ABEC-7 tolerances. They aresupplied with an inner ring-centered phenolic cagedesigned to minimize centrifugal recommended mounting fits refer to Shaft and Housing Fits in Engineering Data Section. D indicates a duplex ground half pair matched with an identical half pair and is followed by an additional suffix letter to describe the type of duplex.

9 See pages 234 and 235 for suffix equivalent load and life calculations see pages 118 and these values for back-to-back (DB) or face-to-face (DF) mounting )NlbfBasic Radial Load RatingSpeed Rating3)StaticC0 NlbfGreaseOilRPMRPMF illet Radius1) 00088 9301 7805 4001 2104400067 7101 9606 1001 3003 440116002 6003300050 4002 790108002 4303000042 9003 580143003 2102600038 2004 090180004 0502000031 9005 150232005 2201800029 7005 550265005 9601700025 9007 170345007 1008 340405009 0008 7008 92048000108001200018 00012 10065500147001100017 90012 60068000153001100016 20012 90072000162001000015 10016 70093000209009 20019 200112 000252009 60014 10017 100104 000234008 80013 60021 500127

10 000286008 00012 50021 900134 000301008 00011 40020 300129 000290007 00027 200170 000382006 6009 00032 800208 000468006 2008 00035 100220 000495005 9008 00045 600300 000674005 1007 00046 800315 000708004 8007 00048 600340 000764004 4006 00062 000425 000956004 1006 00063 200440 000989004 1006 00078 900550 0001240003 7005 8001) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will ) Rating for one million revolutions or 500 hours at 33 | )Values have been determined through historical application and practice.