Low-Pin Trolley

A low-pin trolley keeps the hook block pin as low as possible, reducing overall trolley height. Every centimetre saved is added directly to hook height.

What actually determines hook height

The level a load can reach in a facility is set not by building height but by the sum of several items: runway level, girder depth, trolley design and hook block length. Only one of these — the trolley — can be changed afterwards.

That is why the trolley type is the first place to look on an existing crane where hook height falls short. A worthwhile gain can often be obtained by changing only the trolley, without replacing the girder, raising the runway or touching the building.

Where it makes a difference

In workshops with restricted headroom, the difference between a low-pin trolley and a standard one can decide whether a long shaft can be lifted upright or a die passed over a press. The difference is measured in centimetres, but the outcome is binary: it either clears or it does not.

Selection and compatibility

Capacity, duty class and girder profile are assessed together. For a retrofit, the width and thickness of the girder's lower flange are measured on site and the trolley wheel gauge follows those dimensions.

A low build also means components sit more tightly together, which narrows maintenance access slightly compared with a standard trolley; the periodic maintenance plan is set accordingly.

Applications

Older workshop buildings, lines beneath a mezzanine, low assembly bays, basement production areas.