Hydraulic Nut Splitters and Flange Spreaders: for 13–41 mm Nuts and Flanges

Nut splitters with an integrated pump are self-contained and convenient for field work, while heads with a separate pump handle large nuts and hard-to-reach places. Flange spreaders come as wedge types for narrow gaps and with stepped jaws for opening a joint step by step.

Nut splitter force is usually 5–20 t depending on nut size, and flange spreader force is 2–14 t. For high-strength nuts (above grade 8.8), choose a head with more force and check the hardness allowed by the manufacturer. Read how to choose hydraulic tool load capacity and working force.

A typical set covers 13–19, 19–24, 24–32 and 32–41 mm nuts, while large separate heads reach 50–75 mm. For a flange spreader, the minimum tip thickness (usually 5–6 mm) and maximum spread (about 70–80 mm) matter. More details: how to choose a hydraulic puller and separator.

The nut splitter chisel is made of hardened steel and is replaced when worn, so check the availability of spare chisels and flange spreader wedges. A correctly positioned chisel cuts the nut without reaching the bolt thread. See how to choose spare parts for pneumatic and hydraulic tools.

On models with an integrated pump you simply operate the handle, while separate heads connect to a 700 bar hand pump with a hose and quick coupler. One pump can drive several heads and other 700 bar tools if the couplers are compatible. Read how to choose a hydraulic pump and power source and how to choose hydraulic hoses, couplers, valves and pressure gauges.

Fragments can fly when splitting a nut, so wear safety glasses and gloves, and never open flanges on a pressurised pipeline. After spreading a flange, secure the gap with mechanical wedges or blocks. See how to use hydraulic tools safely.

After work, clean heads and chisels, store the tool with the plunger retracted and check the hydraulic oil level periodically. Pressure loss or leaks indicate worn seals. Read how to store and maintain hydraulic tools.