Hatch Lift Actuator Calculator

Plan a powered hatch lift

The calculator models a rigid hatch rotating about a fixed horizontal hinge. It calculates the changing pin-to-pin distance and force through the complete movement, then compares the result with scaled FIRGELLI actuator models and available stroke options.

Use it for attic and loft hatches, cellar or basement access covers, floor hatches, cabinet and storage lids, utility access panels and similar hinged covers. The same actuator may behave very differently when either mounting point moves, so use measured pin locations rather than choosing from hatch weight alone.

Measurements to collect

• Measure the hatch length from the hinge and include the hatch, trim, handles, brackets and other moving parts in the weight.
• Enter the closed and fully open hatch angles that the installation must reach.
• Measure the moving pin along the hatch and its perpendicular offset from the hatch surface.
• Measure the fixed mounting pin horizontally and vertically from the hinge center.
• Include any additional payload that can remain on the hatch while it moves.

Measurements are pin-center to pin-center. Check clearance for the actuator body, rod, brackets, wiring and nearby structure throughout the entire motion.

Automatic fitting and manual layout

In automatic fitting mode, the calculator looks for mounting positions that use an actuator as close as possible to fully retracted at the closed position and fully extended at the open position. In manual mode, adjust the mounting coordinates to match an existing structure and review any unused stroke or mounting-length warning.

The fitted actuator shown in the simulator is also the first result in Actuator Matches. The animation uses the scaled model for that exact family and stroke so the product body and pin positions can be checked visually.

Before installation

Confirm final pin-to-pin measurements with the selected mounting brackets and verify load capacity, duty cycle, controller compatibility, environmental protection and power requirements on the product page. Use structurally adequate mounting points, keep people clear of pinch and crush zones, and comply with the building and electrical requirements that apply to the installation.

Common questions

Does the calculator choose the actuator stroke?

Yes. It calculates the required travel from the entered geometry and compares it with available stroke and mounting-length combinations. The Fit actuator control can adjust the mounting points to find the closest full-stroke layout.

Can two actuators lift one hatch?

Yes, when the hatch and mounting structure keep the load shared evenly. Two or more actuators require synchronized movement and feedback-capable actuator options. Controller compatibility is shown in the calculator.

Can I use the calculator for an existing hatch?

Yes. Enter the actual hinge, hatch and mounting-point measurements in manual mode. The simulator will show the current geometry and identify compatible or nearby actuator options.