Straight Talk

Turning AustLon®

AustLon® should be turned as a free cutting material: medium speeds of 2.0 – 3.0 meters per second surface speed. For stock removal a larger feed rate can be used, say, .2 – .3mm per rev. A high surface finish can be achieved with final cut of around .1 – .25 per rev. Tools must be kept very sharp at all times, a loss of surface finish is caused by a dull tool. Carbide tipped tools can be used provided they are a ground type. To achieve high accuracy of work, the whole work piece is roughed out first, then machined to finish.

 

Caution

When boring AustLon® rods that are larger than 100mm diameter, it is recommended that a 6mm or 10mm diameter pilot hole is first drilled all the way through. Then the size of the hole is increased in increments of 6mm on the diameter. Although all AustLon® materials are stress relieved during manufacture, it is nevertheless good practice to adopt pilot hole procedures to avoid stress build up. Pilot holing has the effect of slowly releasing any residual stress that may be avoided by turning 5mm off the rod’s diameter before starting.