"Double Star"

Evelyn M Hinton

Angles are for corundum.
Index settings are for an 80 tooth gear.

Pavilion
Preform on 90°: 80, 16, 32, 48, 64,
Cut at 63°*0, 16, 32, 48, 64.
Cut 1st star at 53°: 78, 02, 14, 18,
30, 34, 46, 50, 62, 66.
Cut 2nd star at 43°: 76, 04, 12, 20,
28, 36, 44, 52, 60, 68.
Polish in opposite order.

Crown
Cut at 53°: 80, 16, 32, 48, 64.
Cut 1st star at 43°: 78, 02, 30,
34, 46, 50, 62, 66.
Cut 2nd star at 33°:; 76, 04, 12,
20, 30, 34, 436, 50, 60, 68.
Grind table to meet 2nd star.
Polish in opposite order.