Linear axes

Bosch Rexroth linear axes are precision electromechanical positioning systems that convert rotational motor motion into controlled linear movement for industrial automation applications. These systems integrate servo motors, ball screws, linear guides, and feedback systems into complete motion control solutions used extensively in automotive assembly lines, semiconductor manufacturing, packaging machinery, and CNC machining centers. The SMS-120 series modules like the P10 and P32 variants provide repeatable positioning accuracy within ±0.1mm for applications requiring precise material handling, component placement, and automated assembly operations in manufacturing environments.

The primary selection criteria between SMS-120-P10 and SMS-120-P32 linear axis modules center on payload capacity, stroke length availability, and positioning resolution requirements. The P32 variant typically handles higher thrust loads up to 3200N compared to the P10's 1000N capacity, while both series offer stroke lengths from 400mm to 1200mm as evidenced by models like SMS-120-P32-400 through SMS-120-P32-1200. Speed ratings generally range from 0.1 to 2.0 m/s with positioning repeatability of ±0.02mm for precision applications, while operating temperature limits span -10°C to +80°C for standard industrial environments.

Bosch Rexroth linear axes comply with ISO 9001 quality management standards and CE marking requirements under the Machinery Directive 2006/42/EC for European industrial applications. The integrated position switches like the BNS 819-X series meet IEC 60947-5-1 standards for mechanical switching devices, while proximity sensors such as the BES517 series conform to IEC 60947-5-2 for inductive sensor applications. Safety-related components achieve SIL 2 rating per IEC 61508 functional safety standards, and EMC compliance follows EN 61000 series standards for electromagnetic compatibility in industrial automation environments.

BNS 819 position switches are mechanical limit switches that provide discrete on/off feedback through physical contact actuation, typically used for end-of-travel detection and safety positioning in linear axis applications. In contrast, BES 517 proximity sensors are inductive non-contact devices that detect metallic targets within 2-4mm sensing distance without physical wear, making them ideal for continuous position monitoring and high-cycle applications. The BNS 819 series offers higher switching forces up to 25N with IP67 protection, while BES 517 sensors provide faster response times under 0.5ms and extended service life exceeding 100 million switching cycles due to their contactless operation principle.

SMS-120 linear axis modules require rigid mounting on precision-machined surfaces with flatness tolerance within 0.05mm per meter to ensure optimal performance and guide rail alignment. Standard electrical connections include 24VDC power supply for control electronics, resolver or encoder feedback cables with M23 connectors, and motor power connections rated for servo amplifier output currents up to 20A continuous. Pneumatic brake systems where fitted require clean compressed air at 6 bar operating pressure through G1/8 port connections, while environmental protection ratings of IP54 to IP65 accommodate most industrial installation environments with appropriate cable gland sealing.

Bosch Rexroth position switches and proximity sensors integrated with linear axes achieve IP67 protection rating for dust-tight and temporary immersion resistance in industrial washing applications. Operating temperature ranges span -25°C to +70°C for standard BNS 819 position switches and -40°C to +85°C for BES 517 proximity sensors, accommodating most manufacturing environment conditions. Safety-related position feedback systems meet Performance Level d (PLd) per ISO 13849-1 with Category 3 architecture, while shock resistance ratings reach 30g per IEC 60068-2-27 and vibration resistance achieves 10g per IEC 60068-2-6 for mobile machinery applications.

Bosch Rexroth linear axes require lubrication service every 2000 operating hours or 12 months using specified lithium complex grease LGMT 2 for ball screw assemblies and linear guide carriages. Mechanical position switches like the BNS 819 series typically achieve 10 million switching cycles before replacement, while contactless BES 517 proximity sensors provide maintenance-free operation for over 100 million cycles under normal industrial conditions. Complete linear axis assemblies demonstrate service life exceeding 20,000 hours at rated loads when operated within specified temperature ranges and properly maintained, with annual inspection requirements including backlash measurement, guide rail wear assessment, and electrical connection integrity verification per DIN 31051 maintenance standards.