Gripper Sizing — Encompassing (Form-Closed) Grip
Holding-force and sizing math for a encompassing (form-closed) grip including acceleration and safety factor.
Shaping the jaws to cradle the part — form closure — is the single biggest gripping cheat: the part cannot fall without breaking the jaw, so force only maintains contact. The comparison output shows the 4–8× force saving over flat-jaw friction.
Formula
Note: Planning-level engineering estimate — final robot selection, guarding layout and risk assessment must follow the integrator's calculations and a documented ISO 12100/10218 risk assessment.
Holding-force and sizing math for a encompassing (form-closed) grip including acceleration and safety factor. A free industrial robot kinematics & cell design tool — no sign-up, no upload, instant results in your browser.
About Gripper Sizing — Encompassing (Form-Closed) Grip
Gripper Sizing — Encompassing (Form-Closed) Grip computes the governing relationship Form closure: jaws cradle the part — F ≈ m(g+a)·SF/2 to keep contact live as you type. Shaping the jaws to cradle the part — form closure — is the single biggest gripping cheat: the part cannot fall without breaking the jaw, so force only maintains contact. The comparison output shows the 4–8× force saving over flat-jaw friction. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Gripper Sizing — Encompassing (Form-Closed) Grip
- 1Enter your values — Part mass, Peak acceleration, Safety factor (sensible defaults are pre-filled).
- 2Read the live results: Required grip force, vs friction grip (µ=0.25).
- 3Check the "with your numbers" line to see Form closure: jaws cradle the part — F ≈ m(g+a)·SF/2 to keep contact substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Gripper Sizing — Encompassing (Form-Closed) Grip?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula Form closure: jaws cradle the part — F ≈ m(g+a)·SF/2 to keep contact with authoritative sources cited on the page (Schmalz — Vacuum handling calculation basics; Monkman et al., Robot Grippers (Wiley-VCH))
- ✓Shaping the jaws to cradle the part — form closure — is the single biggest gripping cheat: the part cannot fall without breaking the jaw, so force only maintains contact.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the gripper sizing — encompassing (form-closed) grip use?+
It evaluates Form closure: jaws cradle the part — F ≈ m(g+a)·SF/2 to keep contact, exactly as published. Sources: Schmalz — Vacuum handling calculation basics; Monkman et al., Robot Grippers (Wiley-VCH). The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Shaping the jaws to cradle the part — form closure — is the single biggest gripping cheat: the part cannot fall without breaking the jaw, so force only maintains contact. Planning-level engineering estimate — final robot selection, guarding layout and risk assessment must follow the integrator's calculations and a documented ISO 12100/10218 risk assessment.
When is this calculator the right tool for the job?+
Holding-force and sizing math for a encompassing (form-closed) grip including acceleration and safety factor. A free industrial robot kinematics & cell design tool. The comparison output shows the 4–8× force saving over flat-jaw friction. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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