Additional information relating to
The cold chisel is a very good example of why it is important to know the pedigree of a tool (ie. Where is it made and by whom).
It may seem a simple crude piece of metal, as the quality features of the steel content, the heat treatment and the grinding cannot be seen by the naked eye. However, these features are essential for performance and safety.
One of the most frequent industrial accidents with hand tools is that caused by splintering of an incorrectly treated cold chisel or a chisel used with an incorrectly hardened hammer or the wrong hammer for the job.
Always ensure that the correct size and type of hammer is used with the selected chisel. A useful guide is to use a hammer with an area of striking face twice that of the chisel head being struck.
Always use safety glasses when using these tools.
Always use a quality chisel.
Always use the correct size chisel for the job.
Standard chisels are usually made from octagonal material whereas alloy chisels or alloy types are usually made from hexagonal material.
Alloy chisels are designed for cutting steel and are recommended for that purpose, but as a result of improved alloy ingredients, they can now be successfully used on building materials, where the special alloy steel will also provide improved performance.
The brick bolster (for cutting bricks) is much thicker than the electricians' bolster which is for cutting out switch boxes etc.
Cold chisel based, but with a very much wider cutting edge. They are manufactured to different specifications and should not be interchanged.
For cutting recesses for conduit.
For cutting and chipping masonry or brickwork.
For cutting key-ways and channels.
For cleaning out corners of key-ways etc.
Describes the widened spread of the head of the chisel designed to avoid mushrooming.
For cutting and chipping.
For removing mortar or cement from between bricks.
Round Nose or Half Round
For cutting rounded grooves.