Siemens 1FT5076-0AC01-2-Z Servo Motor – 1FT5 Permanent-Magnet Sync, ~3.0 Nm, Natural Cool, SIMODRIVE 611 / SINUMERIK

Description

Technical Specifications

Main Features and Advantages

1FT5 ruggedness in a no-fan package.​ The Siemens 1FT5076-0AC01-2-Z​ uses the 1FT5 platform’s signature smooth-cylinder stator housing with natural-convection cooling (the “0A” in 0AC01). No fan means no fan-motor bearing to fail, no fan-blade imbalance, and no airflow path pulling grinding coolant mist or steel swarf into the motor interior — a meaningful reliability win in CNC job-shops where the shop-air is 40 % oil mist by lunchtime. The 076 frame’s surface area is sized so that at 3.0 Nm continuous / 3000 rpm, the housing stays within class-insulation limits without forced air. For plants still running 20-year-old Mazak, DMG, or domestic CNC lathes/mills on SINUMERIK 810D, the Siemens 1FT5076-0AC01-2-Z​ is the drop-in that preserves the original thermal profile — swapping to a fan-cooled successor (1FT6) would require checking the machine’s hood clearance and the coolant-spray path.-Z option flexibility for axis-specific fit.​ The “-Z” suffix is why this model trades actively: Siemens 1FT5 base models (without -Z) are “catalog standard” — smooth shaft, no brake, standard connector orientation. The Siemens 1FT5076-0AC01-2-Z​ adds the customer-specific options the OEM machine builder specced when the machine was built — typically a 24 V DC holding brake (M09 code in Z-string) for vertical Z-axis or tailstock quill so the axis doesn’t back-drive on E-stop, plus a keyway (B01) for pulley or coupling positive-drive, and sometimes a second shaft end (C12) for encoder or brake disc on the rear. When sourcing a replacement, matching the -Z subcode string matters — a Siemens 1FT5076-0AC01-2-Z​ without the brake where the machine expects one means the Z-axis drops on power-off (safety + part-scrap risk); a keyway-vs-smooth mismatch means the coupling won’t seat. Reputable suppliers of Siemens 1FT5076-0AC01-2-Z​ document the Z-subcodes on the listing so the buyer can confirm fit before shipping.SIMODRIVE 611 ecosystem compatibility.​ The Siemens 1FT5076-0AC01-2-Z​ was designed nose-to-tail with SIMODRIVE 611: the motor’s 300–350 V STAR windings, the incremental encoder’s electrical interface (1Vpp into the 6SN1118’s measuring-card, or TTL into the 6FX2001 encoder cable → 6SN1118), and the brake’s 24 V DC draw (through the SIMODRIVE’s brake-control relay or the machine’s Safety Integrated chain) are all standardized. A swap is: power down the 611 double-module, unplug the 6FX2001 motor-connector (power + encoder + brake 3-in-1 or split per -Z orientation), unbolt the motor from the machine flange, bolt the new Siemens 1FT5076-0AC01-2-Z, reconnect, and run the SINUMERIK’s “Motor/Encoder” commissioning routine (or manually enter the encoder pulses/mm in the axis MD). No drive firmware change, no NCU software change — the 1FT5 is fully backward-compatible with 611 + 840D/810D.Encoder resilience and bearing life.​ The 1FT5 incremental encoders (Hall + optical disk) are potted and shielded; on Siemens 1FT5076-0AC01-2-Z​ the encoder sits on the rear (DE) end, protected by the encoder hood (6FX2001-style metal hood with O-ring). The front bearing (DE, load-side) is the wear item in a 20-year motor — the 076 frame typically uses 6202 or 6203 deep-groove ball, grease-lubricated for life. In high-duty CNC (3-shift job-shop), the front bearing starts rumbling by year 12–15; the Siemens 1FT5076-0AC01-2-Z​ tested-pulls on the secondary market are typically re-greased or bearing-swapped before resale. The brake (if fitted per -Z) has a friction-bond life of ~1 million engage-cycles; on a Z-axis that E-stops 20×/day, that’s ~15 years — again, the Siemens 1FT5076-0AC01-2-Z​ is usually braked-and-bearing refreshed before resale.Storeroom simplification via 1FT5 cross-reference.​ For MRO buyers on SINUMERIK fleets, the 1FT5 family spans 1FT5062 / 1FT5064 / 1FT5072 / 1FT5074 / 1FT5076 / 1FT5102 — the 076 is the mid-range (~3 Nm) that covers most X/Y feed axes on 30–50 kW CNC lathes and the smaller mill tables. Holding one Siemens 1FT5076-0AC01-2-Z​ and one 1FT5072 (smaller) plus one 1FT5102 (larger) covers 70 % of a mixed shop’s axis-motor failures. The -Z variants cost ~15–25 % more than smooth-shaft non-Z, but the shop rarely regrets paying — the brake alone saves a crashed Z-axis.

Application Field

The Siemens 1FT5076-0AC01-2-Z​ deploys almost exclusively on CNC machine-tool axes that were built in the SINUMERIK 810D / 840D + SIMODRIVE 611 era (roughly 1995–2010), which remains the dominant installed base in contract machining, automotive Tier-supplier job-shops, tool & die, aerospace component machining, and general-industry CNC (lathe, mill, grinder, drill-tap centers, tool-changer carousels).On a CNC lathe​ (e.g., 30 kW class, 300 mm chuck), the Siemens 1FT5076-0AC01-2-Z​ typically serves the X-axis (cross-slide, ~3 Nm continuous suffices for 12 mm depth-of-cut on alloy) and sometimes the Z-axis if the machine uses a separate servo for quill/turret-station; the -Z brake variant is the default on Z because the turret must hold position on E-stop. On a vertical machining center​ (VMC, 40-taper, ~15 kW), the 076-frame often does the Y-axis (shorter travel, lower inertia than X) while X gets a 1FT5074 or 1FT5102; again, Z-axis (quill) gets the brake-equipped Siemens 1FT5076-0AC01-2-Z​ variant. On CNC grinders​ (OD/ID, cam-grind), the 076 frame serves the wheelhead infeed (C-axis on some) where the torque demand is low but positioning repeatability (driven by the incremental encoder + 611 current loop) must be sub-micron — the 1FT5’s low-cogging PM rotor helps here.Retrofit and service​ is the dominant application context now. A 2002-vintage DMG lathe with SINUMERIK 840D, SIMODRIVE 611, and three 1FT5 axes hits year 22: the X-axis Siemens 1FT5076-0AC01-2-Z​ starts rumbling (front bearing), the encoder hood O-ring weeps coolant, the brake-bond is thin. The shop has three paths: (a) source a tested-pull Siemens 1FT5076-0AC01-2-Z​ with fresh bearings/brake/encoder-seal for ~€800–€1500 and be back cutting in 4 hours; (b) upgrade to 1FT6 + 6FX2001 new cables + possibly SIMODRIVE 611 re-commissioning (~€4k–€6k parts + 1 day labour); (c) full machine replace (€150k+). Path (a) is what most job-shops choose — which sustains the Siemens 1FT5076-0AC01-2-Z​ secondary market. System integrators and Siemens service partners stock the motor on mobile vans for CNC-on-site calls, since a failed axis-motor on a 3-shift lathe costs €200–€500/hr in downtime.Non-CNC uses​ exist but are minority: the 1FT5 also appeared on printing-press register drives, textile-machine feed rolls, and packaging-machine indexing — anywhere Siemens sold SIMODRIVE 611 outside pure CNC. But >85 % of Siemens 1FT5076-0AC01-2-Z​ deployments are machine-tool X/Y/Z.