LINEAR MOTION CONTROL Technical Data Sheet Ball Screw Brake The Nexen Ball Screw Brake is a hightorque, spring-engaged brake acting on the machined end of a ball screw. It serves as a primary or redundant safety brake to prevent back driving if a power loss or mechanical defect occurs in the driveline. The low backlash and coupling combination provides a high degree of accuracy for holding ball screw position. An expanding shaft/clamping hub coupling connects the brake shaft to the end of the ball screw. This coupling comes with an elastomer insert with high torsional stiffness. Features • Low backlash for precision holding • Spring engaged, air released • Low inertia • High torsional rigidity • Bi-directional braking • Fast engagement • Meets IP67 dust and waterproof standards • Operates in vertical and horizontal applications • Allows thermal expansio

K (Maximum shaft insertion) A, Bore Diameter (Select from Coupling Table) Figure 1 Model Size Product Numbers (Bore Range) Torque = 5 Nm (44 in-lbs) * Clearance Hole Diameter 1 NOTE: When selecting a brake, a coupling must also be selected. See the coupling chart on the next page. Brake Specifications Model Size Minimum Holding Torque Release Pressure Maximum Speed Nm/radian [lb-ft/radian] Torsional Rigidity

Coupling Specifications BSB Brake Model Coupling Product Number Coupling Bore Range Axial Misalignment Nm/radian [ft-lb/radian] Torsional Rigidity Note: Select a coupling with a bore matching the machined end of the ball screw.

Back Drive Torque Formula In-lbs PLe Back Drive Torque = L = Screw Lead in inches P = Load in pounds e = mechanical efficiency of 0.9 pi = 3.1416 Nm Back Drive Torque = L = Screw Lead in millimeter P = Load in Newtons e = mechanical efficiency (0.9) pi - 3.1416 Note: Select a Ball Screw Brake with holding torque that exceeds the back-drive torque by 20-30%. Brake Control 3-Way Valve, Air Inlet Mount Product Number Valve Effective Orifices Port Size Voltage DIN Connector Power Consumption 964650 Normally Closed 0.062 Body 0.089 Exhaust Port 1/8-27 NPT Male 24VDC Included 25 Watts In accordance...