F-LM flat servo geared motor without encoder

Flat cylindrical F gearbox with LM servo motor without encoder, in a compact design without adapter or coupling. Flat servo gearmotors in the power range 0.71–8.0 kW. Gear ratios 4.3:1 – 366:1. Torque range 19–1,100 Nm. Backlash 5–11 arcmin. Efficiency 96–97%. Positioning accuracy ±1°. Supplied complete with SB6, SC6, SI6. servo drives. Smaller, lighter, and more energy-efficient. Wide speed control range without a fan, with full constant rated torque.

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F-LM flat servo geared motor without encoder

 

Features of F-LM flat servo gearmotors

  • Compact and highly dynamic due to direct mounting of the gearbox to the servo motor, without adapter or coupling.
  • Large center distances, suitable for applications in limited spaces.
  • Choice of standard or reduced backlash.
  • High precision: fractional gear ratio ensures no positioning errors.
  • Maintenance-free: no oil changes or servicing required.
  • Low-noise operation with helical gears.
  • High torsional stiffness.
  • Continuous operation without cooling.
  • Radial shaft seals: FKM on input / NBR on output.
  • Low moments of inertia.
  • Rigid output bearing due to preload.
  • Ambient temperature from 0°C to 40°C (other ranges available on request).
  • Maximum gearbox housing temperature ≤ 80°C.
  • Protection class IP65.
  • Oil quantity depends on mounting position; specify position when requesting or ordering.
  • Gearboxes delivered ready to operate, filled with synthetic gear oil CLP HC ISO VG 150.
  • One primer paint coat in RAL 7001 or RAL 9005.

Optional versions of F-LM flat servo gearmotors

  • Shrink disc cover.
  • Protective cover for hollow shaft with keyway.
  • Protection class IP66.
  • FKM VITON sealing.
  • Double sealing.
  • Reduced backlash 5.0–6.0 arcmin.
  • BR – spring-applied safety brake.
  • Two safety brakes: in the F-MB gearbox adapter and on the servo motor.
  • Reinforced output shaft bearing.
  • Modular helical gear with rack-and-pinion system.
  • Non-toxic oil Mobil CIBUS 150/220 for the food industry, NSF H1 approved.
  • Oil expansion tank for mounting position EL5.
  • Two or more paint layers in any RAL color.

Output shafts of F-LM flat servo gearmotors

  • G – solid smooth shaft
  • V – solid shaft with key
  • V2 – solid shaft with key on both sides
  • A – hollow shaft with keyway (through-bore)
  • S – smooth hollow shaft with shrink disc

Mounting options of F-LM flat servo gearmotors

  • G – threaded holes
  • N – foot mounting
  • F – round flange
  • D – reaction arm (optional rubber bumper)

Features of LM encoderless servo motors

  • Ideal replacement for asynchronous motors
  • Higher energy efficiency compared to comparable IE4 asynchronous motors
  • Energy efficiency IE5 according to IEC/TS 60034-30-2
  • Significantly lighter and more compact than comparable asynchronous motors
  • Higher acceleration capability than asynchronous motors
  • More compact
  • Robust due to the elimination of the encoder
  • Resistant to vibration and shock
  • Cheaper alternative to servo motors
  • Much more durable, as the motor contains no electronics
  • Full control of speed and torque at low speeds and standstill
  • Only standard power cable, no additional encoder cables or shielding
  • Wiring limited to power supply connection cable
  • Power plug freely rotatable with quick-lock
  • No cooling required at low rotational speeds
  • Speed deviation less than 1%
  • Compatible with motor controller – servo drives SB6, SC6, SI6.

Positioning accuracy

  • ±1° on the servo motor shaft without encoder

Protection and environment

  • Protection class IP56

  • Ambient temperature from −15 to +40°C

  • Thermal motor protection – integrated PTC thermistor

  • Rolling bearings with lifetime lubrication and non-contact sealing

  • Radial shaft seals made of FKM

  • Product compliant with EU (CE), UK (UKCA) and cURus directives

 

    Catalogs

    443016_en_06_KAT_Lean-Motoren.pdf – Catalog of LM encoderless servo motors with gearboxes from STÖBER in English.

    serwomotoreduktory_STOBER_26082024.pdf – Inquiry form for STÖBER servo gearmotors in Polish, German, and English.