What this order code actually is
Siemens 1FK2104-6AF01-1SB0 is a SIMOTICS S-1FK2 HD servo motor from the 1FK2 family, sized to run on a SINAMICS S120 drive line with 1 kW at 3000 rpm from a 380-480 V bus, or 0.5 kW at 1500 rpm from a 200-240 V bus, and it holds 3.2 Nm of stall torque (M0). The encoder is an absolute single-turn AS22DQC at 22-bit resolution and the digital feedback rides out of the body on a DRIVE-CLiQ plug M17, so no separate resolver cable or third-party encoder cable is needed — the motor plugs straight into the SINAMICS S120 topology and the drive reads position and commutation on first power-up.
Mechanical envelope for the machine builder
The shaft is D19x40 mm with a feather key, the housing is sealed to IP65, and the power side uses a size M17 connector — that combination is the standard SINAMICS S120 high-dynamic shaft geometry, so existing mounting plates, couplings, and gearboxes laid out around a 1FK2 HD frame can accept this motor without a mechanical re-spin. IP65 here means the body and shaft seal hold up against coolant spray and chip contamination typical of a machining cell, not submersion — the M17 connector face and the DRIVE-CLiQ plug both need their mating cordsets seated for that rating to hold in practice.
Ordering reality: class-C, made to order, single piece
The product carries Group Code R220 in Product Group 9021, ships as 1 Piece per Quantity Unit, and sits in product class C — meaning the unit is manufactured or produced to order and is not a returnable or reusable stock item, so the order is configured at quote time and built against the BOM. Compliance posture is documented as RoHS-conformant since 01-07-06 with REACH Art. 33 disclosure available on request, and the export classification is AL:N / ECCN:N_CNDU — no special export licence required for routine cross-border shipment.
Sourcing posture for a line-down spare
Because class-C units are built per order with no returnable stock, the realistic move on a line-down spare is to request a quote against the exact order code so the variant options — shaft, encoder, connector orientation — are locked in once and confirmed against the BOM before build release.