Product Details:

REXROTH 0608701018 is a modular servo tightening spindle from Bosch Rexroth legacy nutrunner system, equipped with resolver analog feedback and standard quick-change square drive interface. It delivers stable medium torque output and excellent running repeatability, widely deployed on automotive engine and transmission assembly lines for safety-critical bolt joint processes. This legacy spindle model is discontinued, and most available stock on the market are refurbished spare units for maintenance and renovation of existing fastening stations.

This tightening spindle transmits resolver sine and cosine analog signals to matched Rexroth tightening controller, realizing dual closed-loop supervision of torque and rotation angle. Resolver feedback offers strong resistance against vibration, dust and electromagnetic interference, suitable for harsh production workshop environments. It supports multiple configurable tightening strategies including torque control with angle monitoring and yield point detection. Homing operation is required after each power cycle to establish angular reference. Separate power and feedback connectors reduce signal noise interference inside densely arranged industrial control cabinets.

This variant is integrated spindle design without built-in holding brake. It is installed on rotary multi-station fastening fixtures, powertrain assembly stations and heavy mechanical component bolt joining lines, where static locking is handled by external fixture mechanism. The standardized square drive interface supports fast replacement of sockets and adapters, shortening product changeover time for mixed-model production. The internal servo motor winding adopts Class F insulation material and integrates PTC thermal sensor for real-time temperature monitoring to avoid overheating damage during continuous cyclic fastening operation. The spindle housing reaches IP54 protection grade to resist workshop dust and incidental coolant splash. Optimized internal gear and bearing structure suppress torque ripple and impact shock greatly, maintaining consistent tightening precision for high-quality bolt connections.

All tightening sequences, tolerance windows and signal logic can be edited and saved via Rexroth tightening software. Its modular structure allows separate replacement of motor, gearbox and measuring transducer for convenient on-site maintenance. Every finished spindle passes factory validation before shipment, including resolver signal calibration, torque repeatability test, insulation resistance inspection and long-cycle vibration endurance test to guarantee stable performance in multi-shift automated fastening production lines.

It is widely deployed on automotive powertrain assembly stations, new energy battery module fastening lines, heavy mechanical component assembly fixtures and gearbox bolt locking automation cells. Typical application axes include rotary tightening units, multi-spindle fastening modules, angle-controlled bolt driving stations and mixed-model assembly fastening platforms. Automation integrators select this Rexroth spindle variant for its robust resolver feedback, dependable medium torque performance and seamless matching with Rexroth tightening control ecosystem.