| No |
Item |
Symbol |
Meaning |
| ① |
Outer race material symbol |
ID |
Polyacetal (Carbon steel insert bearing) |
| ② |
Outer race shape symbol |
（R） |
Flat *Omitted |
| ③ |
Retainer or full ball type |
S |
Full ball |
| ④ |
Outer race outer diameter |
– |
(Numerical ΦD dimension shown in drawing) |
| ⑤ |
Ball material symbol |
Omitted |
Carbon steel ball |
| ⑥ |
Inner race shape symbol |
H |
Inner ring |
| ⑦ |
Inner race material symbol |
Omitted |
Carbon steel (Plating) |
| ⑧ |
Bore and clearance dimension for mounting |
– |
(Numerical Φd/C dimension shown in drawing) |
| W |
Inner race width (Wide type) & C/C1 dimension |
| ⑨ |
Additional information |
NC2 |
Inner race chamfer (C2) *Side only |
