SFC VACUUM CUP FORCE & DIAMETER CALCULATOR
Industrial Suction Cup Sizing & Holding Force Engineering Audit
Critical Operational Limits & Risk Factors
Theoretical calculations assume ideal lab conditions. Adjust your safety factors if your application meets any boundary conditions below:
Risk: Rapid motion (e.g., Delta/SCARA robots) creates strong inertial forces (F = m · a).
Action: For acceleration > 10 m/s², use higher margins (S ≥ 6 Horizontal / S ≥ 10 Vertical).
Risk: High vacuum levels (-70 kPa+) deform flexible rubber lips, reducing effective suction area by 5%–15%.
Action: Our calculator automatically incorporates a 5% engineering margin before rounding up to stock sizes.
Risk: Cardboard, unpolished wood, or oily metal causes micro-leakage, reducing effective vacuum pressure.
Action: Lower the operational pressure input P in the tool (e.g., set -40 kPa instead of -70 kPa).
Interactive Diameter & Sizing Calculator
Enter your application parameters to generate recommended suction cup dimensions instantly.
Theoretical Holding Force Reference Matrix
Theoretical static vertical force per cup across standard vacuum levels.
| Diameter (mm) | Effective Area (cm²) | -40 kPa | -50 kPa | -60 kPa (Standard) | -70 kPa | -80 kPa | -90 kPa |
|---|---|---|---|---|---|---|---|
| Φ 6 mm | 0.283 cm² | 0.11 kg | 0.14 kg | 0.17 kg | 0.20 kg | 0.23 kg | 0.26 kg |
| Φ 8 mm | 0.503 cm² | 0.21 kg | 0.26 kg | 0.31 kg | 0.36 kg | 0.41 kg | 0.46 kg |
| Φ 10 mm | 0.785 cm² | 0.32 kg | 0.40 kg | 0.48 kg | 0.56 kg | 0.64 kg | 0.72 kg |
| Φ 15 mm | 1.77 cm² | 0.72 kg | 0.90 kg | 1.08 kg | 1.26 kg | 1.44 kg | 1.62 kg |
| Φ 20 mm | 3.14 cm² | 1.28 kg | 1.60 kg | 1.92 kg | 2.24 kg | 2.56 kg | 2.88 kg |
| Φ 25 mm | 4.91 cm² | 2.00 kg | 2.50 kg | 3.00 kg | 3.51 kg | 4.00 kg | 4.50 kg |
| Φ 30 mm | 7.07 cm² | 2.88 kg | 3.61 kg | 4.33 kg | 5.04 kg | 5.77 kg | 6.49 kg |
| Φ 40 mm | 12.57 cm² | 5.10 kg | 6.40 kg | 7.70 kg | 8.90 kg | 10.20 kg | 11.50 kg |
| Φ 50 mm | 19.63 cm² | 8.00 kg | 10.00 kg | 12.00 kg | 14.00 kg | 16.00 kg | 18.00 kg |
| Φ 60 mm | 28.27 cm² | 11.50 kg | 14.40 kg | 17.30 kg | 20.10 kg | 23.10 kg | 25.90 kg |
| Φ 80 mm | 50.27 cm² | 20.50 kg | 25.60 kg | 30.80 kg | 35.90 kg | 41.10 kg | 46.20 kg |
| Φ 100 mm | 78.54 cm² | 32.10 kg | 40.10 kg | 48.10 kg | 56.10 kg | 64.10 kg | 72.10 kg |
