K-LM encoderless bevel servo drive

Bevel angular gearbox with encoderless synchronous electric motor. Gear ratios from 4:1 – 294:1. Max torques 17 – 6820 Nm. Backlash 1.5 – 12 arcmin. Servo geared motors in the power range 0.71 – 8.0 kW. Efficiency 94 – 97%. Positioning accuracy ±1° with Stober servo drives. Energy efficiency class IE5. Smaller, lighter, energy-saving replacement for a geared motor. No fan required at low speeds. Optional encoderless angular servo drive with reduced backlash, brake, special oil, paint, anti-corrosion, splash-proof, and dust-proof finish.

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K-LM encoderless bevel servo drive

Compact and dynamic thanks to direct gearbox mounting on the servo motor without an adapter or coupling.

Features of K-LM bevel servo gearmotors

  • Choice of standard or reduced backlash within 1.5 – 12 arcmin.
  • Precision design – fractional gear ratios ensure no positioning errors.
  • Maintenance-free – no oil change or servicing required for sizes K1 – K4.
  • Quiet operation – helical gear teeth.
  • High torsional stiffness.
  • Continuous operation without additional cooling.
  • Radial shaft sealing: FKM at input / NBR at output.
  • Standard or reinforced output shaft bearings.
  • Rigid output bearing due to preloaded tension.
  • Ambient temperature range: 0°C to 40°C (other ranges available on request).
  • Maximum gearbox housing temperature: ≤ 80°C.
  • Protection class: IP65.
  • Oil volume depends on installation position (please specify position when inquiring or ordering).
  • Optional oil compensation reservoir (EL5) for vertical operation.
  • Ready-to-use gearboxes, filled with synthetic gear oil (CLP HC ISO VG 150).
  • Single-layer primer coating in RAL7001 or RAL9005.
  • Optional: Cover for clamping ring or through-hole sleeve with keyway.
  • For sizes K5 to K10, venting valves are installed by default, depending on the mounting position.

Output Shaft Types for K-LM bevel servo gearmotor

  • G – Solid smooth shaft
  • V – Solid shaft with keyway
  • V2 – Solid shaft with keyway on both sides
  • A – Hollow shaft with keyway
  • S – Hollow smooth shaft with clamping ring and cover
Mounting Options for K-LM bevel servo gearmotor
  • G – Threaded holes
  • N – Foot-mounted
  • F – Round flange
  • D – Torque arm

Features of LM Encoderless Servo Motors

  • Ideal replacement for asynchronous motors.
  • Higher energy efficiency compared to equivalent IE4 asynchronous motors.
  • Energy efficiency class IE5 according to IEC/TS 60034-30-2.
  • Significantly lighter and more compact than comparable asynchronous motors.
  • Greater acceleration capability than asynchronous motors.
  • More compact design.
  • Rugged and durable due to elimination of the encoder.
  • Resistant to vibrations and shocks.
  • Cost-effective alternative to servo motors.
  • Increased durability, as there are no electronics inside the motor.
  • Full speed and torque control at low speeds and standstill.
  • Only a standard power cable required, without additional encoder wiring or shielding.
  • Wiring limited to a single power connection cable.
  • Rotatable power connector socket with quick-lock system.
  • No cooling required at low rotational speeds.
  • Speed deviation of less than 1%.
  • Compatible with SI6 / SC6 servo drives.

Positioning Accuracy

  • ±1° positioning accuracy without an encoder when used with SI6 / SC6 servo drives.

Technical Specifications:

  • Protection class: IP56, optionally IP66.
  • Ambient temperature range: -15°C to +40°C.
  • Thermal motor protection: Integrated PTC thermistor.
  • Rolling bearings with permanent lubrication and contactless sealing.
  • Radial shaft seals made of FKM.
  • Optional spring-applied safety brake.
  • Compliant with EU (CE), UK (UKCA), and cURus regulations.

Optional Features for K-LM bevel servo geared motor

  • Protection class: IP66
  • Sealing: FKM VITON
  • Double sealing
  • Reduced backlash: 1.5 – 6 arcmin
  • BR – Spring-applied safety brake
  • MB version with adapter, coupling, and integrated 24VDC safety brake
  • Reinforced output shaft bearings
  • With modular helical gear and rack
  • Filled with Mobil CIBUS 150/220 oil for food industry applications, NSF H1 approved
  • Oil expansion reservoir for EL5 mounting positions
  • Reinforced bearings for sizes K5 – K9
  • Two or more coats of paint in any RAL color

Catalogs

443016_en_07_KAT_Lean-Motoren.pdf – Catalog of LM encoderless servo drives in English

serwomotoreduktory_STOBER_26082024.pdf – Inquiry form about Stober servo motors in Polish/German/English