SuffixA AC B C CA E B C D DJ Contact angle 30º for ACB (omitted) 25º for ACB 40º for ACB 15º for ACB 25º for ACB 35º for ACB 17º for TRB (omitted) 20º for TRB 28º 30´ for TRB 28º 48´ 39" for TRB 1 B. Special internal design 2 . (Generally C2) Same as above (CN clearance) ISO standard TRB SRB with convex asymmetric rollers and machined cage High load capacity of SRB-R type SRB with convex symmetric rollers and pressed cage High load capacity of SRB-RH type SRB with convex symmetric rollers and one piece machined cage Full complement type (No cage) A.C….Suffix R G GST J R RR RH RHR RHA V A Internal design High load capacity except SRB Equal stand out is provided on both side of the ACB rings. -3… Special parts design 3 . small rib grinding (TRB.RR) LFT -1 Low torque TRB -1.Suffix Special number G For high speed.-2. SRB-R. Suffix Z ZZ ZL ZZL ZX ZZX Shield One side Both side Bend type one side Bend type both side Removable one side Removable both side 4 . Suffix RS 2RS RK 2RK U UU RD 2RD RU 2RU Seal Contact seal (one side) Contact seal (both side) Contact seal for heavy duty (one side) Contact seal for heavy duty (both side) Contact seal for track roller (one side) Contact seal for track roller (both side) Extremely light contact seal (one side) Extremely light contact seal (both side) Non-contact seal (one side) Non-contact seal (both side) 5 . /YD2…) Smaller corner dimension (YR1.Suffix K K30 /YD YR1 YA1 N NR NY Raceway shape Inner ring tapered bore provided (1:12) Inner ring tapered bore provided (1:30) Special diameter raceway (/YD1. YR2…) Bigger corner dimension (YA1. YA2…) Snap ring groove on outside diameter Snap ring and groove Creep prevention resin ring and groove 6 . groove and dowel hole Spiral groove on bore Oil hole & groove on outside for CRB Oil groove on side face for CRB & TRB Only bore oil holes for 5 digits TRB For SRB W33 W33A W33C W33T W3N W3NA 3 oil holes on outer 4 oil holes on outer 6 oil holes on outer 8 oil holes on outer Dowel & 3 oil holes Dowel & 4 oil holes W3NB W3NC W3ND W513 W518 W26 Dowel & 5 oil holes Dowel & 6 oil holes Dowel & 7 oil holes 3 oil hole on both W513 + groove 3 oil holes on inner 7 .Suffix SG W W -1 Oil hole. Suffix ST MD E F H L UA UR HT YH Raceway & rolling elements material Bearing steel SUS440C (Stainless steel) SUS630 (Stainless steel) SAE8620 (Carburizing steel) SAE4320 (Carburizing steel) CH213 (Carburizing steel) SAE5120 (Carburizing steel) KUJ7 (High temp. bearing steel) KCR425 (Carburizing steel) M50 (High speed tool steel) Non-magnetic stainless steel Parts number All parts 1 Outer ring 2 3 4 5 6 Inner ring Rolling elements Outer & inner Outer & rolling elements Inner & rolling elements 7 Retainer 8 . 9 .Suffix Heat treatment & special coating SH KE MG MB Nitride carburizing tempering Special carburizing treatment Silver ion plating Lead ion plating MSA PR PRA PRB PRZ Molybdenum disulfide baking Clean pro coating Gel type clean pro coating High temp. clean pro coating Long life clean pro coating S0 S1 Up to 150 deg Up to 200 deg S2 S3 Up to 250 deg Up to 300 deg Parts number is same as page 29. Suffix C2~C5 M1~M6 CD2~CD3 CM Clearance & preload General clearance For miniature bearing For double row ACB BB for motor CT CRB for motor C1NA~C5NA Non-interchangeable CRB CS Center value of special clearance S L Slight preload Light preload M H Medium preload Heavy preload 10 .