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Siemens 1FK7043-4CH71-1CH1 — Servo Motors

Siemens 1FK7043-4CH71-1CH1 Servo Motor, 1FK7 high-dynamic

MPN1FK7043-4CH71-1CH1
End of Life

Siemens 1FK7 high-dynamic synchronous servo motor, 1FK7043-4CH71-1CH1, 6.35 kg, listed lifecycle_stage eol_hot.

$1,319.53Ref. price · indicative, final on quote
Siemens 1FK7043-4CH71-1CH1 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1FK7043-4CH71-1CH1 — Mechanical
ParameterValue
Weight6.35 kgs

Product details

What the part is on the bench

The 1FK7043-4CH71-1CH1 is a Siemens 1FK7 high-dynamic synchronous servo motor in the compact 1FK7 family, intended for high-acceleration positioning axes where the rotor inertia has to stay low relative to the load. It ships as a bare shaft servo without an integrated gearbox; pairing is done on the machine side with a SIMOTION, SINAMICS, or SIMATIC-controlled drive line that resolves the resolver/encoder feedback over DRIVE-CLiQ.

Procurement posture for this MPN

The 1FK7043-4CH71-1CH1 is supplied through independent distribution: matched against an RFQ, quoted by quantity and lead time, with each line traceable to original Siemens packaging and a documented declaration pack on request.

Frequently asked questions

What is 1FK7043-4CH71-1CH1's closest functional second source — can a 1FK7042-5AF71-1DB0 drop in?

No drop-in. The 1FK7042-5AF71-1DB0 is a smaller-frame 1FK7 variant at 5.44 kg with a different torque/inertia profile and a different encoder suffix, so the shaft, flange, and SINAMICS parameter block all need to be re-verified before it can replace the 1FK7043-4CH71-1CH1 in a working axis.

MPN
1FK7043-4CH71-1CH1