Making large diameter thin gauge tubes

Making small diameter thin gauge tubes

Making large diameter heavy gauge tubes

Making small diameter heavy gauge tubes

Geometric construction method

Triangulation method

Parallel line method

Radial line method

Parallel line method

Triangular method

Radial line method

Geometric construction method

Make large drill

Make small punch mark to seat the compass leg point

Make small drill

Make small boring

Cooling is ineffective

Opening angle incorrect

Selection of snip incorrect

Full length of blade by single stroke