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Bottle Jacks

Bottle jacks lift vehicles, machinery, and structural loads using a vertical hydraulic ram. The compact footprint fits under low-clearance sills and chassis rails where trolley jacks won't reach. Capacities here run from 2 to 50 tonnes, matched to the load you're shifting — under-spec and the ram won't extend fully; over-spec and you're carrying needless weight.

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Picking the Right Capacity

Tonnage is the first spec, but it's not the only one that matters. Check the minimum lifting height — the collapsed height of the saddle — against the clearance under your vehicle or frame. A 12-tonne jack is useless if it's too tall to slide beneath a lowered sill. Maximum lift height tells you how far the ram will extend; if you need more travel, stack solid packing under the jack base, never under the saddle.

The saddle diameter and shape affect contact with the load. Flat saddles suit flat jacking points; some models include a removable screw extension for uneven surfaces or pinch welds. On any jack, centre the load over the ram axis — side-loading bends the piston and blows seals. Use axle stands or cribbing as soon as the load is up; a hydraulic ram holds pressure, but it's not a static support. Seals weep, valves stick, and a dropped load crushes whatever's underneath.

The Sealey range includes 2 to 50 tonne models, some supplied with a storage case to keep dust and grit out of the piston bore between jobs. Smaller jacks — 2, 3, 5 tonne — are light enough to carry in a van or tractor toolkit. Larger units, 12 tonnes and above, are workshop or site tools: heavier, more stable, built for repeated use under plant and heavy commercial vehicles. Match the jack to the lightest regular load you'll lift, not the heaviest thing you might encounter once a year.