| Items |
 03034938 Nexen 5 to 12.7 Inch (in) Bore Size Ball Screw Brake |
03034940 Nexen 6 to 16 Inch (in) Bore Size Ball Screw Brake |
03034942 Nexen 16 to 32 Inch (in) Bore Size Ball Screw Brake |
03034944 Nexen 20 to 35 Inch (in) Bore Size Ball Screw Brake |
04067410 Nexen 12 to 32 Inch (in) Bore Size Ball Screw Brake |
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| Description | 964640 BSB-2-10.0-52.0-63.0-6.3 | 964740 BSB-3-13.0-50.0-95.0-7.0 | 964940 BSB-5-23.0-131.0-165.0-12 | 965040 BSB-7-30.0-130.0-215.0-15 | 964840 BSB-4-23.0-96.0-115.0-10 | |||||
| Supplier Name | Nexen | |||||||||
| Manufacturer Part Number | 964640 | 964740 | 964940 | 965040 | 964840 | |||||
| Model Number | BSB02 | BSB03 | BSB05 | BSB07 | BSB04 | |||||
| Approximate Engagement Response Time | 8 ms | 12 ms | 60 ms | 85 ms | 50 ms | |||||
| Approximate Release Response Time | 92 ms | 75 ms | 100 ms | 145 ms | 80 ms | |||||
| Bore Size | 5 to 12.7 mm | 6 to 16 mm | 16 to 32 mm | 20 to 35 mm | 12 to 32 mm | |||||
| Bore Type | Straight | |||||||||
| Compatible Couplings | 964641 964642 | 964741 964742 964743 964744 | 964841 964847 964854 964859 964862 964863 964868 | 965041 965042 965043 965044 965046 | 964841 964847 964854 964859 964862 964863 964868 964869 964872 | |||||
| Coupling Type | Elastomer Clamp Collar | |||||||||
| Engagement | Spring Engaged | |||||||||
| Release | Air Release | |||||||||
| Finish | Black Anodized | Black Anodized | Black Anodized | Black Acrylic Paint | Black Anodized | |||||
| Function | Stopping and Holding | |||||||||
| Input Bolt Circle | 63 to 92 mm | 95 to 109 mm | 150 to 186 mm | 215 mm | 115 to 150 mm | |||||
| Input Pilot Outside Diameter | 52.0 mm | 50.0 mm | 131.0 mm | 130.0 mm | 96.0 mm | |||||
| Maximum Speed | 10000 rpm | 10000 rpm | 10000 rpm | 5000 rpm | 10000 rpm | |||||
| Maximum Angular Misalignment | 0.8 º | |||||||||
| Maximum Axial Float | ± 1 mm | ± 1 mm | ± 2 mm | ± 2 mm | ± 2 mm | |||||
| Maximum Lateral Misalignment | 0.06 mm | 0.08 mm | 0.10 mm | 0.12 mm | 0.10 mm | |||||
| Maximum Pressure | 100 psi | |||||||||
| Minimum Release Pressure | 80 psi | 49 psi | 80 psi | 80 psi | 80 psi | |||||
| Minimum Static Torque Capacity | 2 N·m | 5 N·m | 45 N·m | 125 N·m | 22 N·m | |||||
| Open or Enclosed Design | Enclosed | |||||||||
| Overall Length | 74.7 mm | 77.7 mm | 127.0 mm | 102.0 mm | 100.0 mm | |||||
| Port Size | 1/8 in | |||||||||
| Port Type | National Pipe Thread (NPT) | |||||||||
| Rating | European Conformity (CE) Ingress Protection (IP67) Restriction of Hazardous Substances (RoHS) | |||||||||
| Recommended Control | 964650 | |||||||||
| Shaft Inertia | 0.20 kg/cm² | 0.50 kg/cm² | 11.40 kg/cm² | 34.40 kg/cm² | 3.10 kg/cm² | |||||
| Torsional Rigidity with Coupling | 350 N·m/rad | 600 N·m/rad | 9750 N·m/rad | 10600 N·m/rad | 9750 N·m/rad | |||||
| Weight | 5 lb | 13.000 lb | 34.00 lb | 8 lb | ||||||
| Features & Benefits |
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| General Information | The Nexen Ball Screw Brake is a high-torque, 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. | |||||||||
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