Box Folding Arm Swing Operator
By Huu Khanh Nguyen · Updated October 29, 2026 · came, folding-arm, swing-operator, post-mounted, box-body
A swing gate operator with a wide low body on the gate post and a folding arm, made for large posts of homes and apartment buildings.
Parameters
| Name | Default | Unit |
|---|---|---|
| Leaf angle | 0 | ° |
| Opening angle | 90 | ° |
| Hinge depth in the post | 0 | mm |
| Mounting height | 50 | mm |
| Sliding travel | 0 | mm |
| Leaf length | 2000 | mm |
| Leaf weight | 400 | |
| Handing | left | |
| Number of leaves | 1 | |
| Post width | 400 | mm |
| Leaf guidance | ground | |
| Shaft behind the hinge axis | openingAngle == 90 ? 150 : 200 | mm |
| Crank arm length | 450 * Math.sin(openingAngle * Math.PI / 360) | mm |
| Connecting arm length | Math.hypot(shaftBehind + 450, hingeDepth + 66) - crankLength | mm |
| Bracket pin x | (450) * Math.cos(leafAngle * Math.PI / 180) - (0) * Math.sin(leafAngle * Math.PI / 180) | mm |
| Bracket pin y | (450) * Math.sin(leafAngle * Math.PI / 180) + (0) * Math.cos(leafAngle * Math.PI / 180) | mm |
| Crank arm angle | Math.atan2(eyeY - (hingeDepth + 66), eyeX - (-shaftBehind)) * 180 / Math.PI + 1 * Math.acos(Math.max(-1, Math.min(1, ((crankLength) * (crankLength) + Math.hypot(eyeX - (-shaftBehind), eyeY - (hingeDepth + 66)) * Math.hypot(eyeX - (-shaftBehind), eyeY - (hingeDepth + 66)) - (connectingLength) * (connectingLength)) / (2 * (crankLength) * Math.hypot(eyeX - (-shaftBehind), eyeY - (hingeDepth + 66)))))) * 180 / Math.PI | ° |
| Elbow pin x | (-shaftBehind) + (crankLength) * Math.cos(armAngle * Math.PI / 180) | mm |
| Elbow pin y | (hingeDepth + 66) + (crankLength) * Math.sin(armAngle * Math.PI / 180) | mm |
| Finish | white |