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ntnamericas.com<br />
APPENDICES<br />
TOLERANCES<br />
Units<br />
Metric μ m<br />
Standard 0.0001 inch<br />
Cylindrical Bore (UC, UCS, AS, ASS, UEL, UELS, AEL, AELS Series)<br />
Nominal Bore Dia.<br />
d<br />
Mean Bore Dia. Deviation<br />
∆dmp<br />
Bore Dia. Deviation<br />
Vdp<br />
Inner Width Deviation, ∆Bs<br />
Outer Width Deviation, ∆Cs<br />
Radial Runout (Ref)<br />
Kia<br />
Over Includes High Low Maximum High Low Maximum<br />
10 18 +15 0 10 0 -120 15<br />
0.394 0.709 +6 0 4 0 -47 6<br />
18 31.8 +18 0 12 0 -120 18<br />
0.709 1.250 +7 0 5 0 -47 7<br />
31.8 50.8 +21 0 14 0 -120 20<br />
1.250 2.000 +8 0 6 0 -47 8<br />
50.8 80 Technical +24Data<br />
0 16 0 -150 25<br />
2.000 3.150 +9 0 6 0 -59 10<br />
80 120 +28 0 19 0 -200 30<br />
3.150 4.724 +11 0 7 0 -79 12<br />
120 180 +33 0 22 0 -250 35<br />
4.724 7.087 +13 0 9 0 -98 14<br />
5. Tolerance<br />
N<br />
Cylindrical Bore (AR, ARS, The tolerances JEL, JELS, of the REL, <strong>NTN</strong> bearing RELS <strong>units</strong> Series) are in accordance<br />
with the following JIS specifications :<br />
Nominal Bore Dia.<br />
d<br />
Cylindrical Bore (CS Series)<br />
d1<br />
Mean Bore Dia. Deviation<br />
∆dmp<br />
Bore Dia. Deviation<br />
Vdp<br />
Over Includes High Low Maximum<br />
10 18 +13 0 6<br />
0.394 The 0.709 tolerances of ball +5bearings used in the 0 unit are shown 2<br />
18 in the 31.8 following tables, +13 5.1 to 5.4. 0 6<br />
0.7087 1.25 +5 0 2<br />
31.8 50.8 +13 0 6<br />
1.250 2.000 +5 0 2<br />
50.8 80 +15 0 8<br />
2.000 3.150 +6 0 3<br />
Nominal bore diameter<br />
Cylindrical bore<br />
Nominal Bore Dia.<br />
d Cylindrical Bore<br />
Bore diameter Width<br />
Radial Width Runout<br />
d<br />
∆dmp Deviation<br />
Vdp Variation<br />
∆Bs, ∆Cs Deviation<br />
Kia<br />
Δdmp<br />
Vdp<br />
ΔBs, ΔCs<br />
Over Includes over High Low incl.<br />
α<br />
MaximumDeviations<br />
High Variations Low Deviations Maximum (reference)<br />
10 18 0 -8 10 0 -120 15<br />
mm<br />
inch mm<br />
inch high low max.<br />
high low<br />
0.394 0.709 0 -3 4 0 -47φ d1<br />
6<br />
18 31.8 0 -10 12 +15 0 0 10 -120 0 18 -120<br />
10<br />
0.3937 18<br />
0.7087<br />
0.7087 1.25 0 -4 5<br />
+ 6 0<br />
0<br />
4<br />
-47<br />
0<br />
7<br />
- 47<br />
31.8 50.8 0 -12 14 +18 0 0 12 -120 0 20 -120<br />
1.250 2.000 18<br />
0.7087 0 31.750 -5 1.2500 6 + 7 0 0 5 -47 0 8 - 47<br />
50.8 80 0 -15 16 0 -150 25<br />
2.000 3.150 31.750 1.2500 0 50.800 -6 2.0000 6 +21 0 0 14 -59 0 10 -120<br />
+ 8 0<br />
6<br />
0 - 47<br />
50.800 2.0000<br />
Basic diameter at the end of the tapered bore<br />
∆dmp Dimensional difference of the average bore diamter<br />
+28<br />
within the flat surface 80 at the theoretical 3.1496 small-end 120 4.7244<br />
+11<br />
of the tapered bore<br />
+33<br />
∆d1mp Dimensional difference 120 of the average bore 4.7244 diamter 180 7.0866<br />
within the flat surface at the theoretical large-end<br />
α +13<br />
of the tapered bore Note: Symbols<br />
Δdmp: Mean bore diameter deviation Vdp: Bore diameter variation<br />
Vdp Unevenness of the bore diameter with the<br />
φ d1<br />
ΔBs: Inner ring width deviation<br />
flat surface<br />
ΔCs: Outer ring width deviation<br />
B<br />
a<br />
Nominal width of inner ring<br />
5.1 Tolerances of ball bearings for the unit<br />
Table 5.1 (1) Cylindrical bore (UC, UCS, AS, ASS, UEL, UELS, AEL, AELS)<br />
Half of the tapered bore nominal taper angle<br />
within the flat surface<br />
Table 5.1 (2) Cylindrical bore (AR, ARS, JEL, JELS, REL, RELS)<br />
80<br />
Nominal bore diameter<br />
d<br />
B<br />
3.1496<br />
φ d<br />
+24<br />
+ 9<br />
Tapered bore having dimensional<br />
difference of the average bore diameter<br />
Δdmp<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
B<br />
B<br />
Bore diameter<br />
φd<br />
16<br />
6<br />
19<br />
7<br />
22<br />
9<br />
Set Set Screw screw Type type<br />
Cylindrical bore<br />
Vdp<br />
φ d<br />
B<br />
C<br />
φ(d+Δdmp)<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
Theoretical tapered bore<br />
α<br />
φ(d1 +Δd1 mp)<br />
SφD<br />
Width<br />
ΔBs, ΔCs<br />
Unit: μm/0.00<br />
-150<br />
- 59<br />
-200<br />
- 79<br />
-250<br />
- 98<br />
Δd1 mp-Δdmp<br />
2<br />
297<br />
Ra<br />
run<br />
K<br />
(refe<br />
(m<br />
1<br />
1<br />
2<br />
2<br />
1<br />
3<br />
1<br />
3<br />
1<br />
Unit: μm/0.00<br />
Ra<br />
run<br />
K
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