
In all cases, the proper shim selection is important. WIDIA™ toolholders are supplied with a shim for a 1,5° lead angle. Change the shim if your thread is more than 1° different. For more details on proper shim selections, see pages F100–F101.
insert screw clamp assembly
insert insert
shim shim
shim screw shim screw
| insert size and screw | insert screw | shim | shim screw and washer | clamp assembly | |
| 3ER | S-SA3T | SM-YIE3 | S-SY3T | CK-C3 | |
| 3EL | S-SA3T | SM-YI3 | S-SY3T | CK-C3 | |
| 4ER | S-SA4T | SM-YIE4 | S-SY4T | CK-C4 | |
| 4EL | S-SA4T | SM-YI4 | S-SY4T | CK-C4 | |
| Laydown Threading boring bars | |||||
| 2IR | S-SN2T | — | — | — | |
| 2IL | S-SN2T | — | — | — | |
| 3IR | S-SA3T | SM-YI3 | S-SY3T | CK-C3 | |
| 3IL | S-SA3T | SM-YIE3 | S-SY3T | CK-C3 | |
| 4IR | S-SA4T | SM-YI4 | S-SY4T | CK-C4 | |
| 4IL | S-SA4T | SM-YIE4 | S-SY4T | CK-C4 | |
| SM | — | Y E | 3 | — 2N |
Shim Y-shim for E — External iC — 16mm Shim Angle
Laydown I — Internal standard inserts
2P 2º positive 1P 1º positive — 0º 1N 1º negative 2N 2º negative 3N 3º negative