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Comprehensive Guide On Nut Splitters

by alinawilson

A nut splitter is a tool for removing seized or broken nuts from bolts and threaded studs. They operate according to bolt tightening torque calculation for keeping the nut at their place. 

What is the purpose of nut splitters?

Rusted nuts can become trapped on bolt shafts and be difficult to get off. Corrosion can cause nuts to become seized on fastener threads. This can make removing them difficult, and using a socket or spanner might exacerbate the problem by slipping and rounding off the nut’s edges.

Nut splitters can be used as a last resort when all other ways of extracting a broken nut have failed. While there are various methods for removing a seized or damaged nut, each will certainly do more damage to the nut, making the operation more difficult.

How does the nut splitter work?

The chisel of a nut splitter is forced into the flat of the nut until it breaks. A nut splitter’s screw is turned clockwise to push the chisel into the nut. When the nut splitter’s handle is cranked clockwise, the chisel or anvil is pushed up against the flat of the nut until it is squeezed between the chisel and the anvil. 

The chisel slices into the flat of the nut as the screw is twisted farther until the nut fractures. This may allow the nut to be removed, or the operation may be repeated on the nut’s opposite side, causing the nut to break in half and fall away from the bolt or threaded rod.

What are the materials used to make nut splitters?

A nut splitter’s chisel and screw are frequently fashioned of a different material than the frame. A nut splitter’s frame is constructed of steel, while the chisel and screw are either chrome molybdenum or hardened high carbon steel. A nut splitter’s chisel is tougher than the nut itself. A nut splitter’s chisel must be fashioned of a tougher material than the nut it is attempting to split. 

What sizes of nut splitters are available?

Nut splitters are sized to fit the size of the nuts they’re supposed to divide. This size can be expressed as the distance between the nut flats in metric or imperial measures, or as the bolt size.

What does it mean to say across flats?

The flats of nuts and bolts are measured. The distance between the two opposite flat surfaces of a nut or bolt head is known as across flats (AF) in the case of nuts and bolts. This distance can be measured in imperial (inches and fractions of inches) or metric (centimeters and fractions of centimeters) units (millimeters).


Nut splitters are basic and easy-to-use instruments that require little upkeep. They should be wiped clean of any dirt or debris of the boiler tube cleaners after use and dried of any moisture they may have come into contact with. It’s a good idea to use a water resistant oil on the chisel and screw to keep them from corroding and to keep the screw and chisel moving smoothly. Nut splitters should be kept in a cold, dry place. Before storing the nut splitter in a cool, dry area, any extra oil should be cleaned off to prevent dust and grime from clinging to it.

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