3. Tolerance S C The tolerances of the NTN bearing units are in accordance with the following JIS specifications: 3.1 Tolerances of ball bearings for the unit B d D The tolerances of ball bearings used in the unit are shown in the following tables, 3.1 to 3.5. Unit: µm/0.0001 inch Table 3.1 (1) Cylindrical bore (UC, UCS, AS, ASS, UELS, AEL, AELS) Nominal bore diameter Cylindrical bore d over incl. mm inch mm inch 10 0.3937 18 0.7087 18 0.7087 30 1.1811 30 1.1811 50 1.9685 50 1.9685 80 3.1496 80 3.1496 120 4.7244 120 4.7244 180 7.0866 Bore diameter ∆dmp ∆ds Deviations Deviations high low high low +18 0 +22 –4 +07 0 +09 –2 +21 0 +25 –4 +08 0 +10 –2 +25 0 +30 –5 +10 0 +12 –2 +30 0 +36 –6 +12 0 +14 –2 +35 0 +42 –7 +14 0 +17 –3 +40 0 +48 –8 +16 0 +19 –3 Width ∆Bs, ∆Cs Deviations high low 0 –120 0 –047 0 –120 0 –047 0 –120 0 –047 0 –150 0 –059 0 –200 0 –079 0 –250 0 –098 Radial runout Kia (max.) Note: Symbols ∆dmp: Mean bore diameter deviation ∆ds: Bore diameter deviation ∆Bs: Inner ring width deviation ∆Cs: Outer ring width deviation Unit: µm/0.0001 inch Table 3.1 (2) Cylindrical bore (UR, AR, JEL, REL) Nominal bore diameter d over mm Cylindrical bore ∆dmp Deviations incl. inch mm inch 10 0.3937 18 0.7087 18 0.7087 31.750 1.2500 31.750 1.2500 50.800 2.0000 50.800 2.0000 80 3.1496 ∆ds Deviations high +13 low 0 high +16 low –3 +05 +13 0 0 +06 +16 –1 –3 +05 +13 0 0 +06 +16 –1 –3 +05 +15 0 0 +06 +19 –1 –4 +06 0 +08 –2 7 15 6 18 7 20 8 25 10 30 12 35 14 Technical Data Unit: µm/0.0001inch Table 3.2 Tapered bore (UK, UKS) Nominal bore diameter d d1: Basic diameter at the theoretical large end of the tapered hole 1 d1=d+ B 12 over incl. ∆ d mp: Dimensional difference of mm inch mm inch high low max. min. max. the average bore diameter within the flat +21 0 +21 0 13 surface at the theoretical 18 0.7087 30 1.1811 +8 0 +8 0 5 small-end of the tapered hole +25 0 +25 0 15 ∆d1mp: Dimensional difference of 30 1.1811 50 1.9685 the average bore +10 0 +10 0 6 diameter within the flat +30 0 +30 0 19 surface at the theoretical 50 1.9685 80 3.1496 large-end of the tapered +12 0 +12 0 7 hole Vdp: Inequality of the bore +35 0 +35 0 25 80 3.1496 120 4.7244 diameter within the flat +14 0 +14 0 10 surface B : Nominal width of inner +40 0 +40 0 31 ring 120 4.7244 180 7.0866 +16 0 +16 0 12 α: Half of the nominal tapered angle of the tapered hole 1) To be applied for all radial flat surfaces of tapered hole. α =2°23'9.4" Note: 1. To be applied for tapered holes of 1/12. =2.385 94° =0.041 643 rad 2. Symbols of quantity or values. ∆d1mp–∆dmp Nominal outside diameter D incl. mm inch 50 1.9685 Mean outside diameter deviation ∆D high mplow 0 –11 3.1496 8 25 3.1496 120 4.7244 0 0 –5 –15 10 35 120 4.7244 150 5.9055 0 0 –6 –18 14 40 150 5.9055 180 7.0866 0 0 –7 –25 16 45 180 7.0866 250 9.8425 0 0 –10 –30 18 50 250 9.8425 315 12.4016 0 0 –12 –35 20 60 0 –14 24 80 Note: 1.9685 80 2α d1+ ∆dmp d1+ ∆dmp B Tapered hole having dimensional difference of the average bore diameter within the flat surface. d 2α d1 B Theoretical tapered hole Nominal outside diameter d over (max.) 20 –4 –13 d+ ∆dmp Table 3.4 Distance S between radial plane passing through center of sphere of outer ring and side of inner ring. Radial runout Kea (max.) 0 0 50 Vdp1) Unit: µm/0.0001inch Table 3.3 Outer ring over mm inch 30 1.1811 ∆dmp Deviations 1) The low deviation of outside diameter Dmp does not apply within the distance of 1/4 the width of the outer ring from the side. 8 S Deviations ∆ Ss incl. mm inch mm inch µm 0.0001inch — 50 — 1.9685 50 80 1.9685 3.1496 ±200 ±250 ±79 ±98 80 120 3.1496 4.7244 120 — 4.7244 — ±300 ±350 ±118 ±138 3.2 Tolerances of housings Unit: µm/0.0001 inch Table 3.5 Spherical bore diameter of housings Nominal spherical bore diameter Da over Tolerance class H7 ∆Damp Deviations incl. mm inch mm inch 30 1.1811 50 1.9685 50 1.9685 80 3.1496 80 3.1496 120 4.7244 120 4.7244 180 7.0866 180 7.0866 250 9.8425 250 9.8425 315 12.4016 Tolerance class J7 ∆Das Deviations ∆Damp Deviations ∆Das Deviations high +25 low 0 high +30 low –5 high +14 low –11 high +19 low –16 +10 +30 0 0 +12 +36 –2 –6 +6 +18 –4 –12 +7 +24 –6 –18 +12 +35 0 0 +14 +42 –2 –7 +7 +22 –5 –13 +9 +29 –7 –20 +14 +40 0 0 +17 +48 –3 –8 +9 +26 –5 –14 +11 +34 –8 –22 +16 +46 0 0 +19 +55 –3 –9 +10 +30 –6 –16 +13 +39 –9 –25 +18 +52 0 0 +22 +62 –4 –10 +12 +36 –6 –16 +15 +46 –10 –26 +20 0 +24 –4 +14 –6 +18 –10 Note: 1) Symbols DDamp: Mean spherical bore diameter deviation DDas : Spherical bore diameter deviation 2) Dimensional tolerances for spherical bore diameter of housing are classified as H7 for clearance fit, and J7 for intermediate fit. Table 3.6 Pillow block housings (P, HP, UP, PL) Housing numbers P203 P204 P205 P206 P207 P208 P209 P210 P211 P212 P213 P214 P215 P216 P217 P218 — — — — — — — — — P305 P306 P307 P308 P309 P310 P311 P312 P313 P314 P315 P316 P317 P318 P319 P320 P321 P322 P324 P326 P328 — — PX05 PX06 PX07 PX08 PX09 PX10 PX11 PX12 PX13 PX14 PX15 PX16 PX17 PX18 — PX20 — — — — — — HP204 HP205 HP206 HP207 HP208 HP209 HP210 — — — — — — — — — — — — — — — — UP204 UP205 UP206 UP207 UP208 UP209 UP210 — — — — — — — — — — — — — — — Unit: µm/0.0001 inch H Deviations ∆Hs — PL204 PL205 PL206 ±150 PL207 ±59 — PL209 PL210 — — — — ±200 — ±79 — — — — — — — ±300 — ±118 — — Note: 1) H is height of the shaft center line. 2) This table can be applied for bearing units with dust covers. 9 Da H Technical Data A2 A2 A2 H1 J J J Table 3.7 Flange unit housings (F, FU, FC, FS, FL, FLU, FD) — — — FC204 — — — FL204 Unit: µm/0.0001 inch J A2 Devia- Deviations tions ∆Js ∆A2s Housing numbers — — F204 — J — — H1 FC2 high low FD201 FD204 0 –46 F205 F305 FX05 FC205 FS305 FL205 FL305 FD205 0 –18 F206 F306 FX06 FC206 FS306 FL206 FL306 FD206 F207F307 FX07 FC207 FS307 FL207 FL307 FD207 F208F308 FX08 FC208 FS308 FL208 FL308 F209F309 FX09 FC209 FS309 FL209 FL309 — — F210F310 FX10 FC210 FS310 FL210 FL310 F211F311 FX11 FC211 FS311 FL211 FL311 — — F212F312 FX12 FC212 FS312 FL212 FL312 F213F313 FX13 FC213 FS313 FL213 FL313 F214F314 FX14 FC214 FS314 FL214 FL314 — — — F215F315 FX15 FC215 DS315 FL215 FL315 — F216F316 FX16 FC216 FS316 FL216 FL316 F217F317 FX17 FC217 FS317 FL217 FL317 — — F218F318 FX18 FC218 FS318 FL218 FL318 — F319 — — FS319 — FL319 — — — F320 FX20 — FS320 — FL320 — — — F321 F322 — — — — FS321 FS322 — — FL321 FL322 — — — F324 — — FS324 — FL324 — — F326 — — FS326 — FL326 — — F328 — — FS328 — FL328 — ±700 ±276 ±500 ±197 0 0 0 0 ±1000 ±394 ±800 ±315 Deviations –54 –21 FS3 high — — — — 0 0 –46 –18 0 0 –46 –18 0 0 –54 –21 0 0 –63 –25 0 0 –72 0 –28 0 0 — FCX low high –63 –25 0 ∆H1s 0 0 low –54 –21 0 –63 0 –25 0 0 –72 –28 — — Radial runout of spigot joint ∆ is (max.) 200 79 300 118 –72 –28 –18 –32 — 400 0 0 –89 –35 157 Note: 1) J is the bolt hole’s center line dimension, A2 is the distance between the center line of spherical bore diameter of the housing and mounting surfaces, and H1is outside diameter of the spigot joint. 2) Radial runout of spigot joint is applied for flange units with spigot joints. 3) For FU2 and FLU2 types, tolerances for F2 shall be applied. 4) For FCX and FLX types, tolerances for FX shall be applied. 5) This table can be applied for bearing units with dust covers. 10 Table 3.8 Flange unit housings (FH, FA, PF, PFL) Unit: µm/0.0001 inch A2 Deviations ∆A1s Housing numbers A2 J — FH, FA204 FH, FA205 FH, FA206 FH, FA207 FH, FA208 FH, FA209 FH, FA210 ±500 ±197 FA211 ±800 ±315 Housing numbers PF203 PF204 PF205 PF206 PF207 PF208 PFL203 PFL204 PFL205 PFL206 PFL207 H1 Deviations ∆H1s ±500 ±197 Note: 1) A2 is distance between the center line of spherical bore diameter of housings. 2) J is the bolt hole’s center line dimension. H1 H A1 A Table 3.9 Take-up unit housings (T) Unit: µm/0.0001 inch Housing numbers T204 T205 T206 T207 T208 T209 T210 T211 T212 T213 T214 T215 T216 T217 — — — — — — — — — T305 T306 T307 T308 T309 T310 T311 T312 T313 T314 T315 T316 T317 T318 T319 T320 T321 T322 T324 T326 T328 — TX05 TX06 TX07 TX08 TX09 TX10 TX11 TX12 TX13 TX14 TX15 TX16 TX17 — — — — — — — — A1 Deviations ∆A1s H1 Deviations ∆H1s high high 0 0 low +200 +79 0 0 low –500 –197 H Parallelism of guide (max.) Housing numbers +300 +118 0 0 C2 ∆Hs C3 CX high low high low high low C204 — C205C305 C206C306 C207C307 C208C308 C209C309 C209C309 C210C310 C211C311 C212C312 C213C313 — C314 — C315 — C316 — C317 — C318 — C319 — C320 — C321 — C322 — C324 — C326 — C328 500 197 600 236 0 0 Deviations –800 –315 700 276 800 315 Note: 1) A is the width of guide rail grooves. 2) H1 is the maximum span of guide rail grooves. 1 3) This table can be applied for bearing units with dust covers. — CX05 CX06 CX07 CX08 CX09 CX09 CX10 CX11 CX12 — — — — — — — — — — — — — 0 0 0 0 0 0 –30 –12 — — — — 0 0 –35 –14 0 0 –35 –14 0 0 –40 –16 0 0 –40 –16 –35 –14 –40 –16 Radial A runout Deviaof tions outside surface ∆As (max.) 200 79 300 118 0 0 — –46 –18 — — 0 0 –52 –20 0 0 –57 –22 ±300 ±118 — 400 157 Note: 1) H is the outside diameter of cartridge housings. 2) A is width of cartridge housings. 11 ±200 ±79