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How to use a centre square

Shop for Centre and Edge Finding Sets

You will need: a centre square a scriber/ pencil/ pen round workpiece You will need:

  • A centre square
  • A scriber/ pencil/ pen
  • Round workpiece
Wonkee Donkee says: 'What is a scriber? A scriber is a pointed tool used to etch lines on material before machining. It is primarily used to mark metals but can also be used with glass or plastic.'
Step 1 Place the workpiece in between the arms of the centre square.

Step 1 – Position workpiece

Place the workpiece in-between the arms of the centre square.

Step 2 Scribe a line across the diameter of the workpiece, using the blade as a guide.

Step 2 – Scribe line across diameter of workpiece

Scribe a line across the diameter of the workpiece, using the blade as a guide.

Step 3 Rotate the workpiece by approximately a third of way around the circumference and scribe a second line.

Step 3 – Rotate workpiece

Rotate the workpiece by approximately a third of way around the circumference and scribe a second line.

Step 4 Rotate the work once again and scribe a third and final line.

Step 4 – Rotate workpiece again

Rotate the work once again and scribe a third and final line.

The exact centre of the workpiece is the point where the scribed lines intersect each other. The exact centre of the workpiece is the point where the scribed lines intersect each other.