Most rolled angle rings (also called angle flanges, companion angle rings, standard angle rings or blow pipe rings) are rolled leg out (i.e. they look like an old-timey, straw hat without the top) and are made from equal-leg angles (e.g. 1/2 x 1/2 x 3/8in).
Recently, a customer asked us to roll off-axis unequal-leg angles with bolt holes into rings and to weld the ends on the inside only for a new, agricultural application.
More specifically, they requested 3 x 2 x 3/16 angle, with 36 holes 13/32in diameter in one leg and 12 holes 3/4in diameter in the other leg, rolled with the heel in (toes out) to a 36in inside diameter welded on the inside only. The rolled angle ring was to be 30 degrees off-axis.
The customer also requested 3 x 2 x 3/16 angle, with 48 holes 13/32in diameter in one leg only, rolled with the heel in (toes out) to a 60in inside diameter welded on the inside only. Again the rolled angle ring was to be 30 degrees off-axis.
After pricing was established, the customer asked for samples . Its project managers were proceeding with design and production of all of the connecting parts, so pressure was high to perform. Chicago Metal delivered on time and met their tolerances.
These unusual steel angle rings solved the design engineering problems for the customer’s new products.