Of all spinnerettes, dry spinnerettes especially require the highest accuracy. It is very important to keep high accuracy in diameter and length of capillary for circular hole spinnerettes and in width and length of slots for shaped hole spinnerettes,and it is also important to keep a fine finish and profile in the countersink.
Countersink of shaped hole spinnerette has its own special profile for each type of shaped hole. The following are standard profiles of countersinks of circular hole spinnerettes.
| Capillary spec. | Dia.tolerance | Length tolerance | |||
| Dia.(mm) | L/D | Special | Standard | Special | Standard |
| 0.030 | 1/1 | >}0.001 | }0.0015 | }0.005 | }0.010 |
| 0.030`0.050 | 2/1 | }0.001 | }0.002 | }0.005 | }0.015 |
| 0.050 | }0.001 | }0.002 | }0.010 | }0.020 | |
