Ball Screws CAD Configurator 1. Select Ball Screws series Select Compact FA Series FSS Series - Low Cost Ball Screws RNCT Series 2. Select size Select Screw shaft Ø10 - Lead 5, 10 Screw shaft Ø12 - Lead 5, 10, 20, 30 Screw shaft Ø15 - Lead 5, 10 Screw shaft Ø20 - Lead 5, 10, 20, 30, 40, 60 Screw shaft Ø25 - Lead 5, 10, 20, 25, 30, 50 Screw shaft Ø15 - Lead 20, 30 2. Select size Select Screw shaft Ø12 - Lead 10 Screw shaft Ø15 - Lead 10, 20 Screw shaft Ø25 - Lead 10, 20, 25 Screw shaft Ø20 - Lead 10, 20 2. Select lead Select RNCT - Rolled Ball Screw Nut with fine or medium lead RNFBL - Rolled Ball Screw Nut with a fine or medium lead RNFCL - Rolled Ball Screw Nut with a high helix lead RNFCL - Rolled Ball Screw Nut with an ultra-high helix lead RNFTL - Rolled Ball Screw Nut with a fine- or medium lead RNFTL - Rolled Ball Screw Nut with a high helix lead RNSTL - Rolled Ball Screw Nut with a fine- or medium lead 3. Configure your Ball Screws