Design of Pressure Flange
In general, SAPL-R series is supposed to be used along with pressure flanges whose design varies according to user’s shaft/hub design. Please refer to the below design variables.
Location of screws (locking bolts) on the pressure flange (F)
- Case1: Pressure flange mounted on Hub
F = D + 12 + db (screw size)
- Case2: Pressure flange mounted on Shaft
F = D – 12 - db (screw size)
Thickness of pressure flange (P)
- Case1: Fastened with Grade 8.8 class screw
P = 1.3 x db (screw size)
- Case2: Fastened with Grade 12.9 class screw
P = 1.8 x db (screw size)
If more than 2pcs of SAPL-R are mounted simultaneously
- Distance(W) between pressure flange and hub/shaft has to be adjusted. Please refer to “Dimensions / Performance” pages for (W) values.
Transmissible Torque Calculation (Formula)
Screw Size (db) |
Pressure on each screw (Pb [N]) | ||
---|---|---|---|
Grade 8.8 class | Grade 10.9 class | Grade 12.9 class | |
M4 | 3,900 | 5,450 | 6,550 |
M5 | 6,350 | 8,950 | 10,700 |
M6 | 9,000 | 12,600 | 15,100 |
M8 | 16,500 | 23,200 | 27,900 |
M10 | 26,200 | 36,900 | 44,300 |
M12 | 38,300 | 54,000 | 64,500 |
If more than 2pcs of SAPL-R are mounted simultaneously, the clamping force on shaft (permissible torque) becomes higher.
- SAPL-R/ 1pc mounted: Tc (Max. Permissible Torque)
- SAPL-R/ 2pcs mounted: Tc (Max. Permissible Torque) x 1.55
- SAPL-R/ 3pcs mounted: Tc (Max. Permissible Torque) x 1.85
- SAPL-R/ 4pcs mounted: Tc (Max. Permissible Torque) x 2.02