SIEMENS 1FT5046-1AK71-3AB0 Servomotor Tacho Brake 6000rpm Brake

Buy online your SIEMENS 1FT5046-1AK71-3AB0 Servomotor Tacho Brake reference 1FT5046-1AK71-3AB0 from our US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

This SIEMENS 1FT5 AC servo motor is a CNC feed-axis unit with integrated 1FU1030 tacho feedback and a spring-applied holding brake. It is commonly sourced as a replacement motor and spare part on older SIEMENS axis packages that rely on analog velocity feedback, offering a practical path to restore axis motion on mills and lathes without redesigning the drive loop.

The motor provides analog speed feedback through the 1FU1030 tacho generator, which helps legacy drives maintain stable velocity regulation and smooth low-speed behavior. The integrated brake secures the load when power is removed, a frequent requirement on vertical axes or safety-related stops on production floors.

Mechanical fit is straightforward for field replacement. The 15 mm keyed straight shaft and 80 mm centering diameter match common couplings, pulleys and gearboxes used on 1FT5-equipped machines. Matching the exact reference 1FT5046-1AK71-3AB0 ensures a drop-in replacement with existing hardware, also searched as 1FT50461AK713AB0 or 1FT5046 1AK71 3AB0.

Rated up to 6000 rpm, this three-phase AC unit covers a wide operating window for CNC feed axes in milling, turning and handling stages. The IP65 enclosure rating supports reliable service in workshop environments where dust and coolant spray are present. Built in Germany, refurbished units are function tested for consistent performance on legacy installations.

Reference: 1FT5046-1AK71-3AB0

Manufacturer: SIEMENS

Product type: SIEMENS Servo motor 1FT

Main function: AC servo for CNC axis motion with analog tacho feedback and integrated holding brake

Applications: Feed axes on CNC mills and lathes, vertical axes requiring brake hold, retrofit and maintenance replacements on older systems using analog tacho velocity loops

Key technical data: 1FT5 AC servomotor with 1FU1030 tacho around 6.7 mV per rpm signal constant, up to 6000 rpm, 3-phase, IP65 protection, 15 mm keyed straight shaft, 80 mm centering diameter, integrated spring-applied brake, refurbished and function tested, manufactured in Germany, typical availability 5 to 8 days.

In maintenance practice, this exact model is selected to resolve axis faults such as following errors, unstable speed regulation or brake issues on machines originally equipped with the 1FT5 platform. Keeping a stocked replacement unit in the toolroom shortens downtime for both planned overhauls and unplanned failures, and the matching tacho constant helps limit commissioning time.

For field replacement work, matching the mechanical interface and the original reference delivers a direct swap with minimal alignment effort. Using the same 1FU1030 tacho constant allows the existing drive tuning to remain close to baseline values, which supports a fast return to production.

Each refurbished unit is inspected and tested by skilled engineers on CNC simulators with servo motors, including tacho signal verification, brake function checks and dynamic run tests. Motors are packed for industrial transport with rotor locking and connector protection, and a warranty is supplied. Many stocked items ship directly from our Florida facility, with dispatch timing depending on availability.

This model is frequently requested as an emergency spare for legacy equipment and can help keep older CNC installations running when the original part becomes an obsolete part. Cnc-shopping USA can assist with a repair service or an exchange service when possible, and sourcing support is available for hard-to-find parts from industrial spare inventory.

Frequently asked questions about 1FT5046-1AK71-3AB0:

What feedback device does this motor use and why does it matter for replacement?
It uses a 1FU1030 tacho generator that delivers an analog speed signal around 6.7 mV per rpm. Matching this tacho constant helps your legacy drive maintain its original velocity loop behavior with minimal parameter changes.

Does it include a holding brake and where is it typically used?
Yes, an integrated spring-applied brake is included. It is commonly used on vertical axes and applications that must hold position safely at power off or during service work.

What mechanical points should be verified before ordering?
Confirm the 15 mm keyed shaft, the 80 mm centering diameter and the exact reference on your nameplate. When the original tag shows 1FT5046-1AK71-3AB0, the replacement is intended as a drop-in fit.

What lead time should we plan for and where do units ship from?
Typical availability is 5 to 8 days. Depending on inventory, products are commonly dispatched from our Florida warehouse.

Is it suitable for retrofit on older SIEMENS drives?
It is used on systems that accept analog tacho input. For retrofit work, verify the drive’s tacho compatibility and confirm the required tacho constant before installation.