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The distance between the lowest and highest position of the load attachment. It is rarely needed in full, but the two ends decide: at the bottom the deepest pick from a pallet or pit, at the top the highest transfer. Stating only the middle working range produces a device that falls short at exactly the two critical points.
The stroke is the distance the load attachment can travel vertically. Lifting height denotes the highest position above the floor. Headroom is the dimension the unit itself occupies above the load attachment. Together the three determine whether a unit fits into a hall and reaches every point there.
A long stroke is of no use if it lies in the wrong place. What decides is where the lower and the upper end position sit in the room.
The lower end position follows from the lowest pick-up: the bottom layer on a pallet, the floor of a wire mesh container, a part in a pit. It is measured to the load attachment, not to the workpiece – a gripper that takes the part from above has to go lower than the part is high.
The upper end position follows from the highest transfer: the loading height of a machine or the edge the part is lifted over, plus the height of workpiece and attachment and a safety distance. The stroke is the difference between the two end positions of the load attachment, plus an allowance so that the limit switch is not hit in normal operation.
The load attachment has to reach down to 0.20 m above the floor at the lowest point and up to 1.60 m at the highest. The difference is 1.40 m. With an allowance of 0.15 m the required stroke is 1.55 m.
Whether the unit provides this travel in the right place only becomes clear from the height calculation with track and headroom. Under a low ceiling the stroke may be available and the upper end position still too low.
On chain hoists the stroke is almost freely selectable; the chain disappears into the chain container. On rope hoists the drum sets the limit. Rigid lifting axes and cylinders need a corresponding overall length for their stroke – a long stroke costs headroom there. On parallelogram and articulated arms the lift results from the arm geometry and is coupled to the outreach.
Power-driven hoists limit the travel automatically at top and bottom. These limits are safety devices, not a means of positioning in normal operation.
What Entracon offers here is on the matching page.
See what we offer| Design | How the stroke is produced | Limit |
|---|---|---|
| Chain hoist | Chain runs into the chain container | Size of the container |
| Rope hoist, rope balancer | Rope is wound onto a drum | Capacity of the drum |
| Lifting axis, cylinder | Rigid guide extends | Overall length grows with the stroke |
| Parallelogram or articulated arm | Arm pivots about a joint | Arm length and pivot angle |
The difference between the highest and the lowest position of the load attachment, plus an allowance so that the limit switches are not reached in the normal sequence.
Because a unit almost always fails at the ends, not in the middle: at the bottom layer of the pallet or at the highest machine edge. Both extremes belong in the enquiry.
No. On rigid lifting axes it costs headroom, and on all designs it lengthens travel and lifting times. The sensible stroke is the one the workstation requires, with a small allowance.
Where the catalogue ends.
View IndustryLarge, heavy, delicate – and still one person.
View GuidesThe question is never “which unit?”. It is “which movement?”.
View GuidesThere is no 25-kilogram limit. There is an assessment.
View GuidesVacuum is the fastest pick-up – as long as the surface plays along.
ViewOne short conversation usually settles more than three quotations. Call or write — you will reach an engineer directly.
Start typing – for example “balancer”, “SAP” or “pipe stress”.
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