Bosch Rexroth 0608701018 EC304 SZ4 Servomotor Nutrunner Assembly

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Bosch Rexroth 0608701018 (EC304 SZ4) is an electric servomotor designed specifically for high-precision industrial tightening applications, such as automotive powertrain, chassis, and critical fastener assembly lines. Delivering maximum speeds up to 20,000 RPM, it provides precise torque delivery, smooth dynamic acceleration, and accurate angle feedback to ensure zero-defect joint production.

Securing the 0608701018 as New Surplus provides a vital hedge against line-stop incidents in automated production environments. Tightening motors endure continuous thermal cycles and mechanical duty, leading to insulation breakdown or resolver drift over millions of duty cycles. By choosing factory-fresh New Surplus inventory rather than used or refurbished assemblies, manufacturing plants preserve OEM joint accuracy, eliminate unexpected torque-check failures, and lower Total Cost of Ownership (TCO) without paying inflated factory lead-time premiums.

0608701018

0608701018

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Safety First: Disconnect and lock out (LOTO) all electrical power to the corresponding Rexroth Tightening System Drive / Controller (e.g., Compact Control 350).
2. Mechanical Inspection: Unpack the 0608701018 unit and verify that the output shaft, keyway/splines, and heavy-duty industrial connectors are completely free of damage or transit debris.
3. ESD & Cable Checks: Wear a grounded ESD strap when handling feedback lines. Inspect the power and resolver cables for jacket cuts or terminal contamination.

Stage 2: Removal

1. Unplug the main power feed and resolver/sensor cable connectors from the motor rear housing.
2. Unbolt the motor flange from the planetary gear unit or nutrunner mounting housing.
3. Carefully pull the existing motor straight out along its axis to prevent shaft binding or damaging internal coupling splines.

Stage 3: Installation (Clone & Seat)

1. Clean the mounting flange face on the gear unit to ensure smooth metal-to-metal seating.
2. Align the motor shaft keyway or spline with the mating gearbox input socket.
3. Slide the 0608701018 motor into position and torque all flange retaining bolts to Bosch Rexroth engineering specifications.
4. Reconnect power and signal cables, hand-tightening the threaded connector locking rings to maintain the IP rating.

Stage 4: Power-On & Testing

1. Re-energize the tightening controller channel.
2. Perform a low-speed jog / calibration test from the system operator interface to verify proper motor rotation direction and resolver feedback.
3. Run a test cycle on a calibration transducer joint to confirm that delivered torque and angle measurements match specified production tolerances.

Firmware/Software Versions & Upgrade Notes

• System Controller Integration: The 0608701018 servomotor is recognized automatically by Bosch Rexroth Tightening Controllers via motor ID chip data stored in the feedback encoder.
• Compatibility: Fully compatible with Rexroth Compact Control (CC) 350 and Modular Tool Control (MTC) 350 tightening channels operating Size 4 spindle profiles.
• Calibration & Parameter Backup: Prior to swapping motors on a critical production spindle, back up the tool calibration parameters (R-value, transducer offsets) on the main tightening card to ensure seamless joint tracking after hardware replacement.

Frequently Asked Questions (FAQ)

Q: Is this Bosch Rexroth 0608701018 motor guaranteed brand new?

A: Yes, this unit is guaranteed New Surplus / Original New. It has never been deployed on an active assembly line, rebuilt, or repaired. It remains in original factory condition with full component integrity.

Q: Why is New Surplus a superior choice over a cheaper refurbished nutrunner motor?

A: Refurbished nutrunners often retain worn internal bearings, degraded motor windings, or worn resolver assemblies that can cause micro-vibrations and torque measurement drift. In high-precision automotive assembly, an inaccurate motor can lead to thousands of improperly torqued joints. New Surplus guarantees 100% factory precision and full operational life.

Q: Does this 0608701018 motor include an integrated gear head unit?

A: This model code covers the EC304 SZ4 servomotor core unit. Planetary gear heads (such as 0608720040) are typically modular and can be coupled directly to this motor flange during installation.

Q: Can I hot-swap this servomotor while the tightening system is powered up?

A: No. Never disconnect or reconnect servomotor power or feedback cables while the drive controller is powered. Doing so can cause electrical arcing, damage internal feedback electronics, or trigger safety faults on the controller.

Q: What warranty coverage comes with this New Surplus servomotor?

A: All New Surplus 0608701018 motors include a comprehensive 1-year functional replacement warranty from the shipment date.