Threading Tools SSTE / SSTI Inserts ■ Shim Selection If the pitch is large or the threading diameter is small, the threading lead angle will become large and the effective relief angle will become small. It is ideal to set the threading insert so that both right and left relief angles are equal. Therefore, it is necessary to select an appropriate shim based on the thread pitch and effective diameter using the table below.
A
A
Shim
Insert
T 1 ≈ Lead Angle (Ideal Setup)
Insert
Shim
T 2 : Shim Angle
Lead Angle
Cross Section A-A
F
■ Shim Selection Procedure 1. Choose from [Right-Hand Thread / Left-Hand Thread] in the table. 2. Locate the required threading "pitch". 3. Locate the cell with the required "Effective Diameter" range. 4. Confirm the part no. at the "Shim" row above the corresponding "Effective Diameter" cell located previously. If the shim part no. is different from the one currently in use, change to the correct one. Example: W hen machining a M16x2.0 external right-hand thread, the pitch diameter is 14.701mm. In the table below, locate [2.0]mm under the "Pitch" column then move along the row to the right to locate the required "Effective Diameter" range [11.4 - 17.4]mm. As such, the correct shim should be [YE3-1P], shown in the corresponding cell under the "External" row above.
For External Diameters: YE3-3P For Internal Diameters: YI3-3P
For External Diameters: YE3-2P For Internal Diameters: YI3-2P
For External Diameters: YE3-1P For Internal Diameters: YI3-1P
T 1 =4.5°
T 1 =3.5°
T 1 =2.5°
D D
D
For External Diameters: YE3 For Internal Diameters: YI3
T 1 =1.5°
3.0
* Standard shim supplied with holder
2.0
For External Diameters: YE3-1N For Internal Diameters: YI3-1N
T 1 =0.5°
1.0
0
10 20 30 40 50 60 70
Effective Diameter of Threading Hole (mm)
● Pitch (mm) Right-hand/Left-hand Thread
For Right-hand Thread
For Left-hand Thread
4.5°
3.5°
2.5°
1.5° YE3 *
0.5°
-0.5°
-1.5°
Lead Angle
YE3-3P YI3-3P
YE3-2P YI3-2P
YE3-1P YI3-1P
YE3-1N YE3-2N YE3-3N YI3-1N YI3-2N YI3-3N
External Internal
YI3 *
Shim Angle ( β 1 )
3°
2°
1°
0°
-1°
-2°
-3°
Pitch ( mm )
Effective Diameter ( mm )
0.5
1.9 - 2.2 2.8 - 3.3 3.8 - 4.3 4.7 - 5.4 5.7 - 6.5 6.6 - 7.6 7.6 - 8.7 9.5 - 10.8 11.4 - 13.0
2.2 - 2.8 3.3 - 4.3 4.3 - 5.7 5.4 - 7.1 6.5 - 8.5 7.6 - 10.0 8.7 - 11.4 10.8 - 14.2 13.0 - 17.1
2.8 - 4.3 4.3 - 6.5 5.7 - 8.7 7.1 - 10.9 8.5 - 13.0 10.0 - 15.2 11.4 - 17.4 14.2 - 21.7 17.1 - 26.0
4.3 - 11.4 6.5 - 17.1 8.7 - 22.8 10.9 - 28.5 13.0 - 34.2 15.2 - 39.9 17.4 - 45.6 21.7 - 57.0 26.0 - 68.4
> 11.4 > 17.1 > 22.8 > 28.5 > 34.2 > 39.9 > 45.6 > 57.0 > 68.4
> 11.4 > 17.1 > 22.8 > 28.5 > 34.2 > 39.9 > 45.6 > 57.0 > 68.4
11.4 - 4.3 17.1 - 6.5 22.8 - 8.7 28.5 - 10.9 34.2 - 13.0 39.9 - 15.2 45.6 - 17.4 57.0 - 21.7 68.4 - 26.0
0.75
1.0
1.25
1.5
1.75
2.0 2.5 3.0
● TPI (threads/inch) Right-hand/Left-hand Thread
For Right-hand Thread
For Left-hand Thread
4.5°
3.5°
2.5°
1.5° YE3 *
0.5°
-0.5°
-1.5°
Lead Angle
YE3-3P YI3-3P
YE3-2P YI3-2P
YE3-1P YI3-1P
YE3-1N YE3-2N YE3-3N YI3-1N YI3-2N YI3-3N
External Internal
YI3 *
Shim Angle ( β 1 )
3°
2°
1°
0°
-1°
-2°
-3°
Effective Diameter ( mm )
TPI (Threads/Inch)
32 28 27 24 20 18 16 14 13 12 11 10
3.0 - 3.3 3.0 - 3.8 3.6 - 4.1 4.1 - 4.6 4.8 - 5.6 5.3 - 6.1 5.8 - 6.9 6.9 - 7.9 7.4 - 8.4 8.1 - 9.1 8.4 - 9.7 8.9 - 9.9 9.7 - 10.9 10.7 - 12.2 11.9 - 13.7
3.3 - 4.6 3.8 - 5.1 4.1 - 5.3 4.6 - 6.1 5.6 - 7.1 6.1 - 8.1 6.9 - 8.9 7.9 - 10.2 8.4 - 11.2 9.1 - 12.2 9.7 - 12.4 9.9 - 13.2 10.9 - 14.5 12.2 - 16.0 13.7 - 18.0
4.6 - 6.9 5.1 - 7.9 5.3 - 8.1 6.1 - 9.1 7.1 - 10.9 8.1 - 12.4 8.9 - 13.7 10.2 - 15.7 11.2 - 17.0 12.2 - 18.5 12.4 - 19.3 13.2 - 20.1 14.5 - 22.1 16.0 - 24.4 18.0 - 27.7
6.9 - 18.0 7.9 - 20.8 8.1 - 21.3 9.1 - 24.4 10.9 - 29.0 12.4 - 32.5 13.7 - 35.8 15.7 - 41.1 17.0 - 44.7 18.5 - 48.8 19.3 - 50.3 20.1 - 52.6 22.1 - 57.9 24.4 - 64.3 27.7 - 72.4
> 18.0 > 20.8 > 21.3 > 24.4 > 29.0 > 32.5 > 35.8 > 41.1 > 44.7 > 48.8 > 50.3 > 52.6 > 57.9 > 64.3 > 72.4
> 18.0 > 20.8 > 21.3 > 24.4 > 29.0 > 32.5 > 35.8 > 41.1 > 44.7 > 48.8 > 50.3 > 52.6 > 57.9 > 64.3 > 72.4
18.0 - 6.9 20.8 - 7.9 21.3 - 8.1 24.4 - 9.1 29.0 - 10.9 32.5 - 12.4 35.8 - 13.7 41.1 - 15.7 44.7 - 17.0 48.8 - 18.5 50.3 - 19.3 52.6 - 20.1 57.9 - 22.1 64.3 - 24.4 72.4 - 27.7
11.5
9 8
* SSTE Type/SSTI Type holders are shipped with shims for lead angle of β 1 = 1.5° (SSTE Type: YE3, SSTI Type: YI3). Shims for lead angles of β 1 = -1.5°, -0.5°, 0.5°, 2.5°, 3.5°, and 4.5° are sold separately. * Shims are not needed for SSTI R1812M16 and SSTI R2016M16. (The holders are already provided with the standard holder inclination of 1.5°.)
F79
Made with FlippingBook flipbook maker