8 Ton Hydraulic Ram Jack Lift Shop Crane Engine Hoist Lifting Double Dual Pump

A shop crane with a tired ram turns a ten-minute engine pull into an afternoon of pumping. This long ram jack is the cylinder that does the work in that sort of setup: clevis-mounted at the base, driven by a double pump, and fitted with a slow-release valve so a load comes down under control rather than in a rush.

Fifty centimetres of stroke

Two numbers matter when a long ram goes into a crane: how short it closes, and how far it travels. This one measures 66 cm (26 in) closed and 116 cm (45.7 in) fully out, giving a stroke of 50 cm (19.7 in). The closed length is what has to fit between the mounting points on your crane or press, so measure that gap before ordering rather than after. Stroke is what turns into boom travel once the geometry multiplies it. The cylinder is 8 cm across with a 3 cm rod, and the mounting pinholes are 1.7 cm.

Two pistons, fewer strokes

A double pump is two pistons of different bore working off one handle. The big one shifts a lot of oil per stroke to close the gap quickly while the ram is barely loaded; as pressure builds, the small one takes over and gives you the mechanical advantage to keep going. On a long ram that saves a lot of arm work, because most of the 50 cm of travel happens before the load comes on. Bringing it back down is handled by a slow-release valve rather than a dump, and the handle is rubber-gripped so oily hands still get purchase.

Key features

• Supplier rating of 8 ton: quoted as written — the supplier does not state whether this means metric tonnes or short tons.
• Double-pump head: two piston bores off one handle, so the fast strokes happen while the ram is unloaded.
• 50 cm stroke: 66 cm closed, 116 cm extended, which is the working range you have to design your mounting around.
• Slow-release valve: meters the descent instead of dropping the load when the valve cracks open.
• Clevis-style base: pins into a crane or hoist frame rather than sitting loose on a pad.
• Rubber-gripped handle: still grippable with oil or grease on your hands.

Specifications

• Lifting capacity: 8 ton (basis not stated by the supplier — metric tonnes or short tons is not specified)
• Pump type: dual piston / double pump
• Minimum height, closed: 26 in / 66 cm
• Maximum height, extended: 45.7 in / 116 cm
• Stroke length: 19.7 in / 50 cm
• Cylinder diameter: 3.1 in / 8 cm
• Piston rod diameter: 1.2 in / 3 cm
• Pinhole diameter: 0.7 in / 1.7 cm
• Base type: clevis-style mount
• Release valve: slow-release control
• Handle: rubber grip
• Material: high-grade steel
• Weight: 10 kg as stated by the supplier

This jack lifts — it does not hold

• A hydraulic jack is a lifting device only. Never get under a vehicle or a load held up by this ram: lower it onto rated stands or blocks first, then check they are carrying the weight before anyone goes underneath.
• Seals leak and valves weep. A ram left holding a load for any length of time will settle, which is another reason the load belongs on solid support.
• The 8 ton figure is the ram's own rating. It says nothing about the crane, press or frame you fit it to — work to whichever rating is lower.
• No standard, certification or test rating is named by the supplier for this jack.
• Check the stated 10 kg weight and the 66 cm closed height against your own measurements on arrival; both need to suit the frame before you load it.

A long ram built for crane, press and hoist duty. Measure your closed-length gap first, and pair it with proper stands for anything that has to be worked on.

For returns due to change of mind, a 20% restocking fee will be applied.