Motors and Drives

Servo. Brushless. Frameless.
Motion for robotics, automation and humanoid joints.

AC servo (220V, 50W - 1000W), DC servo (48V, 50W - 1000W), brushless DC, BLDC gear motors, frameless torque motors up to 9.5 Nm, humanoid joint modules, circular drives and hollow encoders - all under OEL's integrated motor program. Built in our Asian hubs, supported from Bridgeton, Missouri.

Browse the Catalog Spec a Motor
50W - 1kW
Servo Power Range
24 - 220V
Voltage Options
IP65 / 67
AC Servo Protection
EtherCAT
+ CAN, RS485, Step/Dir

Product families

Six motor-and-drive families covering everything from 50 W compact servos to 10 Nm frameless torque motors, including purpose-built humanoid robotic joint modules.

OEL AC servo motor

OEL-ASM

AC Servo Motors

220 V AC, 50 W to 1000 W, 40 / 60 / 80 mm frames, 0.16 - 3.2 Nm. Silver housing, IP65/67, plug-in or linear (flying-lead) connector, with or without holding brake.

View specs →
OEL DC servo motor

OEL-DSM

DC Servo Motors

48 V DC, 50 W to 1000 W, 40 / 60 / 80 mm frames, 0.16 - 3.2 Nm. Black housing, AGV and battery-powered equipment, aviation plug or direct-connect cable.

View specs →
OEL brushless DC motor

OEL-BLDC (TEC)

Brushless DC Motors

Compact brushless DC motors from 24 mm to 56 mm diameter. Hall-sensor and sensorless variants. Drop-in for robotics, smart home, automation, personal care.

View specs →
OEL BLDC gear motor

OEL-P (GMP)

BLDC Gear Motors

Brushless DC with matched planetary gearheads, 22 to 60 mm bodies. Configurable reduction ratios for high-torque / low-speed applications.

View specs →
OEL frameless torque motor

OEL-FM1 / FM2

Frameless Torque Motors

Hollow-shaft frameless BLDC for robotic joints. FM1 economy 50-115 mm, FM2 ultra-high-density 50-127 mm. Up to 9.5 Nm. 24-70 V.

View specs →
OEL humanoid joint module

OEL-HJ1 / HJ2

Humanoid Joint Modules

Integrated motor + reducer + drive + encoder + brake packages for humanoid robotics. Flat, tall and collaborative form factors. EtherCAT / CAN.

View specs →

AC Servo Motors – OEL-ASM series

220 V AC servo motors for industrial automation, machine tools, packaging lines and medium-voltage motion systems. Small size (industry's shortest class), high protection (IP65 / IP67) and refined finish (integrated silver housing).

Standard spec matrix – AC Servo 220 V

Frame Power Rated voltage Rated torque Rated / max speed Rated / max current Rotor inertia Length (no brake / brake) Weight
40 mm50 W220 V0.16 Nm3000 / 6000 rpm0.95 / 3.4 A0.036 (0.046) kg·cm²56.7 / 84 mm0.28 / 0.44 kg
40 mm100 W220 V0.32 Nm3000 / 6000 rpm0.95 / 3.4 A0.062 (0.072) kg·cm²67.7 / 95.3 mm0.43 / 0.53 kg
60 mm200 W220 V0.64 Nm3000 / 6000 rpm1.4 / 5.03 A0.28 (0.3) kg·cm²71.8 / 101.1 mm0.95 / 1.35 kg
60 mm400 W220 V1.27 Nm3000 / 6000 rpm2.1 / 6.5 A0.56 (0.58) kg·cm²88.8 / 118.1 mm1.3 / 1.75 kg
60 mm600 W220 V1.91 Nm3000 / 6000 rpm3.7 / 11.5 A0.83 (0.85) kg·cm²108.6 / 138.6 mm1.59 kg
80 mm750 W220 V2.39 Nm3000 / 6000 rpm4.1 / 13.4 A1.5 (1.65) kg·cm²90.9 / 121.9 mm2.12 / 2.7 kg
80 mm1000 W220 V3.2 Nm3000 / 6000 rpm5.7 / 17.1 A2.0 (2.15) kg·cm²103.9 / 134.9 mm2.7 / 3.5 kg

Values in parentheses are for the brake-equipped variant. Connector options: AMP flying-lead (linear) or aviation plug (plug-in). Encoder: 17-bit magnetic (M17) or 23-bit optical (E23).

Key benefits
  • Industry-shortest frame length for the power class
  • IP65 / IP67 protection against dust and washdown
  • Integrated silver housing, premium finish
  • 3000 rpm rated, 6000 rpm peak
Configurations
  • Brake: with (E) or without (F) 24 V DC holding brake
  • Connector: linear AMP flying lead (1) or aviation plug (3)
  • Encoder: M17 magnetic (17-bit) or E23 optical (23-bit)
Typical applications
  • Machine tools and CNC axes
  • Packaging, printing, textile
  • Semiconductor handling
  • Factory automation cells

DC Servo Motors – OEL-DSM series

48 V DC servo motors for AGVs, AMRs, battery-powered equipment, robotics and automation cells where a DC bus is available. Black housing, aviation plug or direct-connect cable, with or without brake.

Standard spec matrix – DC Servo 48 V

Frame Power Rated voltage Rated torque Rated / max speed Rated / max current Rotor inertia Length (no brake / brake) Weight
40 mm50 W48 V0.16 Nm3000 / 4000 rpm3.0 / 9.3 A0.036 (0.046) kg·cm²56.7 / 84 mm0.33 / 0.49 kg
40 mm100 W48 V0.32 Nm3000 / 4000 rpm5.7 / 17.7 A0.062 (0.072) kg·cm²67.7 / 95 mm0.43 / 0.59 kg
60 mm200 W48 V0.64 Nm3000 / 4000 rpm6.0 / 19.6 A0.29 (0.3) kg·cm²71.6 / 100.9 mm1.03 / 1.38 kg
60 mm400 W48 V1.27 Nm3000 / 4000 rpm10 / 31 A0.58 (0.59) kg·cm²88.6 / 117.9 mm1.32 / 1.67 kg
60 mm600 W48 V1.91 Nm3000 / 4000 rpm15 / 49.3 A0.83 kg·cm²108.6 / 137.9 mm1.59 / 2.0 kg
80 mm750 W48 V2.39 Nm3000 / 3500 rpm19 / 59 A1.5 (1.65) kg·cm²90.9 / 121.9 mm2.21 / 2.79 kg
80 mm1000 W48 V3.2 Nm3000 / 3500 rpm28 / 87 A1.8 (1.95) kg·cm²103.9 / 134.9 mm2.6 / 3.18 kg

Brake-equipped lengths in parentheses. Connector: direct- connect (1) or aviation plug (3). Encoder: M17 magnetic or E23 optical.

Key benefits
  • Industry-ultra-short length
  • IP65 / IP67 protection level
  • Black lustrous integrated housing
  • 48 V bus compatible with most AGV / AMR platforms
Configurations
  • Brake: with (E) or without (F) 24 V brake
  • Connector: direct-connect (1) or aviation plug (3)
  • Encoder: M17 magnetic or E23 optical
Typical applications
  • AGV / AMR drive and steering
  • Collaborative robotics
  • Mobile material handling
  • Battery-powered automation

Brushless DC Motors – OEL-BLDC (TEC) series

Compact brushless DC motors for robotics, smart home, security, personal care, automotive components and commercial equipment. Hall-sensor and sensorless variants available across the full frame range.

Model range

OEL part number Legacy TEC code Approx. diameter Typical use
OEL-BLDC2418TEC241824 mmSmall-device, personal care, locks
OEL-BLDC2430TEC243024 mmCompact automation, light robotics
OEL-BLDC2838TEC283828 mmSmart home, industrial appliances
OEL-BLDC3040TEC304030 mmRobotics end-effectors, commercial
OEL-BLDC3625TEC362536 mmShort-body 36 mm, general purpose
OEL-BLDC3640TEC364036 mmStandard 36 mm, robotics joints
OEL-BLDC3650TEC365036 mmLong-body 36 mm, higher torque
OEL-BLDC4260TEC426042 mmMid-power automation
OEL-BLDC56100TEC5610056 mmHigher-power industrial applications

Full data sheet per part number available on request - includes winding options (12 V / 24 V / 36 V), rated torque, speed, current, KV constant and shaft options.

BLDC Gear Motors – OEL-P (GMP) series

Brushless DC motors paired with matched planetary gearheads. High output torque, low shaft speed, compact packaging - ideal for slow-rotation axes, conveyors, lifting mechanisms and robot-arm joints.

Model range

OEL part number Configuration Gearhead Motor Typical use
OEL-22P-2238GMP22 + TEC223822 mm planetary22 mm BLDCCompact lifting / indexing
OEL-22P-2418GMP22 + TEC241822 mm planetary24 mm BLDCSmart home, security
OEL-24P-2430GMP24 + TEC243024 mm planetary24 mm BLDCPersonal care, light robotics
OEL-28P-2838GMP28 + TEC283828 mm planetary28 mm BLDCMedical devices, automation
OEL-36P-3650GMP36 + TEC365036 mm planetary36 mm BLDCRobot grippers, rotary axes
OEL-42P-4260GMP42 + TEC426042 mm planetary42 mm BLDCAGV drive wheels, wheelchairs
OEL-60P-56100GMP60 + TEC5610060 mm planetary56 mm BLDCHigh-torque industrial automation

Reduction ratios available in standard steps. Brake and encoder options on request. Custom ratios and shaft arrangements quoted as short-run builds.

Frameless Torque Motors – OEL-FM series

Rotor-and-stator-only motors with hollow center, built to be integrated directly into the mechanical structure of a robotic joint or direct-drive axis. No bearings, no shaft - you supply the mechanics, we supply the magnetics. FM1 is the cost-optimized economy range; FM2 is the ultra-high-density range with 10 % more torque in the same envelope and 20 % less loss.

FM2 – ultra-high density (50 / 60 / 70 / 85 / 94 / 127 mm stator OD)

Model Rated torque Max speed Rated current Voltage range Rotor inertia Stator OD
OEL-FM2-050080.33 Nm5500 rpm6.06 A24 - 70 V190 kg·cm²50 mm
OEL-FM2-050140.55 Nm3900 rpm5.65 A24 - 70 V225 kg·cm²50 mm
OEL-FM2-060080.48 Nm5000 rpm6.6 A24 - 70 V251 kg·cm²60 mm
OEL-FM2-060110.65 Nm3800 rpm6.5 A24 - 70 V259 kg·cm²60 mm
OEL-FM2-060261.4 Nm3000 rpm11.3 A24 - 70 V440 kg·cm²60 mm
OEL-FM2-070100.66 Nm3900 rpm7.32 A24 - 70 V270 kg·cm²70 mm
OEL-FM2-070181.4 Nm3000 rpm11.9 A24 - 70 V440 kg·cm²70 mm
OEL-FM2-085131.5 Nm3100 rpm12.9 A24 - 70 V487 kg·cm²85 mm
OEL-FM2-085232.86 Nm3500 rpm21.2 A24 - 70 V1048 kg·cm²85 mm
OEL-FM2-094081.58 Nm3500 rpm13.6 A24 - 70 V579 kg·cm²94 mm
OEL-FM2-094132.1 Nm3000 rpm14.9 A24 - 70 V660 kg·cm²94 mm
OEL-FM2-094162.8 Nm3000 rpm21.2 A24 - 70 V880 kg·cm²94 mm
OEL-FM2-094264.0 Nm2000 rpm22.9 A24 - 70 V838 kg·cm²94 mm
OEL-FM2-127183.6 Nm2400 rpm23.2 A24 - 70 V905 kg·cm²127 mm
OEL-FM2-127256.4 Nm2400 rpm36.9 A24 - 70 V1608 kg·cm²127 mm

FM1 – economy (50 / 70 / 85 / 115 mm stator OD)

Model Rated torque Max speed Rated current Voltage range Rotor inertia Stator OD
OEL-FM1-050080.3 Nm5250 rpm7.04 A24 - 70 V165 kg·cm²50 mm
OEL-FM1-050140.5 Nm3650 rpm6.56 A24 - 70 V191 kg·cm²50 mm
OEL-FM1-070100.62 Nm3650 rpm6.67 A24 - 70 V237 kg·cm²70 mm
OEL-FM1-070181.22 Nm2000 rpm13.3 A24 - 70 V256 kg·cm²70 mm
OEL-FM1-085131.41 Nm3100 rpm12.4 A24 - 70 V458 kg·cm²85 mm
OEL-FM1-085232.51 Nm3500 rpm21.2 A24 - 70 V920 kg·cm²85 mm
OEL-FM1-115253.2 Nm1800 rpm15.5 A24 - 70 V603 kg·cm²115 mm
OEL-FM1-115509.51 Nm620 rpm32.2 A24 - 70 V617 kg·cm²115 mm
Highlights
  • Low thermal rise - 20 % less motor loss
  • High density - 10 % more torque at same envelope
  • Long battery life - efficiency-optimized for cordless
  • Ultra-thin profile - direct integration into joints
Build options
  • Voltage: 24 V / 36 V / 48 V / 60 V / 72 V / 110 V / 220 V / 380 V (D/E/F/G/H/K/M/N codes)
  • Temperature sensor: NTC (T), PTC (P), none (N), special (S)
  • Hall sensor: switch (H), linear (X), none (N), special (S)
  • Leadwire: no wire (5), 200 mm (6), custom (7)
Where they shine
  • Humanoid and collaborative robot joints
  • Direct-drive rotary tables
  • Gimbal and camera stabilizers
  • Exoskeletons and prosthetics

Humanoid Joint Modules – OEL-HJ series

Fully integrated joint packages for humanoid, collaborative and quadruped robotics - combining frameless motor, reducer, CDH driver, hollow encoder and brake in a single sealed housing. Economy HJ1 and standard HJ2 tiers, three form factors (flat, tall, collaborative), four reducer families (harmonic, RV, planetary, direct).

OEL humanoid joint module - sectioned view

Integrated joint stack

  • Frameless motor - FM1 economy or FM2 ultra-high-density
  • Reducer - harmonic (HJ2T), RV (HRV2) or planetary (HP2); ratios 15:1 through 161:1
  • Driver - CDH circular driver, 24 V / 48 V bus, EtherCAT or CAN
  • Encoder - 16 / 17 / 19-bit hollow encoder, single or multi-turn
  • Brake - permanent-magnet holding brake, or brake-free option

Why you want it as a module: mechanical and electrical integration pre-validated, thermal path managed end-to-end, wiring simplified to power + bus, and the whole joint is serviceable as a unit.

Form factors and reducer options

Form F – flat

Flat (F) form factor

Short axial length, wide OD. Ideal for low-profile hip, waist and yaw joints on humanoid robots. OD 40 - 170 mm.

Form H – tall

Tall (H) form factor

Longer axial profile. Fits into upper-arm and shoulder positions where radial space is constrained.

Form T – collab

Collaborative (T) form factor

Cobot-optimized profile with integrated torque sensing capability. For safety-rated human-robot collaborative arms.

HJ2T – harmonic

Harmonic reducer, ratios 15:1 - 161:1 depending on frame. Best for the highest precision and lowest backlash.

HRV2 – RV

RV cycloidal reducer. Higher shock-load capacity, best for the base and shoulder joints that carry the whole payload.

HP2 – planetary

Planetary reducer, cost-efficient, broad ratio range. Good all-rounder for elbow, wrist and finger joints.

Build axes
TierHJ1 economy, HJ2 standard
Module OD40 - 170 mm across the family
FormF flat / H tall / T collaborative
Reducer ratio15:1, 18:1, 21:1, 25:1, 31:1, 36:1, 41:1 - up to 161:1
DriverCDH series (standard)
Encoder16-bit, 17-bit or 19-bit; single- or multi-turn
BrakeN = none, B = permanent-magnet
Voltage24 V (code 1) or 48 V (code 2)
ProtocolEtherCAT (EC) or CAN (C)

Circular Drives – OEL-CDH series

Ring-shaped servo drivers designed to mount inside a joint module next to the frameless motor. Tight integration, short cable runs, low EMI, EtherCAT or CAN fieldbus.

Highlights
  • Circular footprint matched to frameless motors
  • 24 V and 48 V DC bus
  • EtherCAT CiA 402 or CANopen
  • Integrated current, voltage and thermal sensing
Control modes
  • Cyclic position (CSP)
  • Cyclic velocity (CSV)
  • Cyclic torque (CST)
  • Profile position, velocity, torque
Where they ship
  • Standalone (joint integrator supplies motor)
  • Bundled with the FM1 / FM2 motor of choice
  • Pre-integrated inside HJ1 / HJ2 joint modules

Hollow Encoders – OEL-CE series

Compact hollow-shaft absolute encoders designed to slide directly over the center bore of a frameless motor or joint module. No coupling, no alignment grief, nothing in the wiring path.

Resolution
  • 16-bit single-turn absolute
  • 17-bit single-turn absolute
  • 19-bit single-turn absolute
  • Multi-turn variants available
Integration
  • Hollow-shaft design - slide onto motor shaft
  • Compact axial profile for joint packaging
  • Matched mounting to FM1 / FM2 motors
Interfaces
  • BiSS-C (standard)
  • SSI (on request)
  • EnDat-compatible variants

Part-number naming convention

Every OEL motor and drive encodes its configuration in a deterministic part number so you can quote and order precisely. Pick once, reorder forever.

Example: AC Servo Motor

OEL-ASM08010H2E1M17E23 → Overland Engineering and Logistics → AC Servo Motor → 80 mm frame → 10 (1000 W) → H2 (220 V) → E (with brake) → 1 (AMP linear cable) → M17 (17-bit magnetic encoder) + E23 (23-bit optical encoder option).

SegmentMeaningOptions
OEL-BrandOverland Engineering and Logistics
ASM / DSM / BLDC / FM / HJ / CDH / CEProduct lineAC servo / DC servo / brushless / frameless / joint module / drive / encoder
040 - 127Frame / ODin mm, e.g. 040 = 40 mm, 080 = 80 mm, 127 = 127 mm
005 - 010Power (*100 W)005 = 50 W, 010 = 100 W, 075 = 750 W, 100 = 1000 W, etc.
E / FBrakeE = with brake, F = without brake
1 / 3Connector1 = AMP linear (flying-lead), 3 = aviation plug
M17 / E23EncoderM17 = 17-bit magnetic, E23 = 23-bit optical

Frameless and joint-module lines follow a parallel naming scheme (FM1 / FM2 economy / density tier, HJ1 / HJ2 joint tier, reducer family code, etc.). Full decode on request.

Where OEL motors earn their keep

Humanoid and collaborative robotics

Hip, shoulder, elbow, knee and wrist joints. FM2 frameless motors + HJ2T harmonic joint modules form the backbone of humanoid platforms.

AGVs and AMRs

48 V DC servos for drive and steering, BLDC gear motors for wheel hubs, DC servos for lift and arm actuators.

Factory automation

AC servos for CNC axes, indexing, packaging, printing and textile. Step-servo and BLDC for lighter automation cells.

Medical devices

Compact BLDC and gear motors for infusion pumps, surgical robotics, lab automation, patient-positioning mechanisms.

Smart home and personal care

24 and 28 mm BLDC for smart locks, beauty devices, appliances. Quiet, efficient, long-life brushless construction.

Aerospace ground support and defense

Custom-wound BLDC and frameless motors for gimbals, cameras, actuators and ground-support equipment. MIL-grade on request.

Standards and certifications

Audited to the standards your industry expects.

Motor manufacturing runs under our ISO 9001:2015 quality system and - for automotive programs - IATF 16949:2016. Compliance covers EMC (EN 61800-3), safety (EN 61800-5-1 / UL 61800-5-1), CE and UL marking where required. EtherCAT Technology Group membership and CANopen CiA 402 conformance on all networked drives.

ISO 9001 certified IATF 16949 automotive CE mark UL listed EtherCAT conformant

Frequently asked

Both. You can buy any item in the catalog standalone - motor, drive, encoder, reducer - and integrate them yourself. We also sell pre-integrated packages (HJ joint modules include motor + reducer + drive + encoder + brake in a single sealed unit) for customers who want to skip the mechanical and electrical integration work.

FM1 is the cost-optimized economy series - ideal for high-volume applications where the unit cost matters most. FM2 is the ultra-high-density series, delivering roughly 10 % more rated torque in the same stator diameter and roughly 20 % less motor loss, at a higher unit price. Pick FM2 when continuous-duty thermal budget is tight (cordless battery-powered joints) or when you need every bit of torque density from the envelope.

Yes. Custom windings (different voltage or KV constant), custom shafts (longer, shorter, keyed, threaded), custom flange patterns, custom cabling, stainless or nickel plating, and private-label stamping are all routine. Typical custom lead time 4 - 8 weeks from approved drawing. No minimum order quantity for custom prototypes.

CDH circular drives support EtherCAT (CiA 402 profile) and CANopen natively. Additional drives in the catalog support RS-485 / Modbus RTU, Modbus TCP, EtherNet/IP, and step/direction pulse control. Specify the protocol in your RFQ and we'll point you at the matched drive.

Yes - that is a core program for us. Typical engagement is: you share your joint-stack requirements (torque, speed, OD envelope, axial length, voltage, comms, brake requirement), we reply with a recommended HJ1 or HJ2 configuration and a first-article lead time. Prototypes are validated in-house before the production order, and we hold the spec on file for repeat orders at no re-engineering charge.

Standard catalog motors (OEL-ASM, OEL-DSM, TEC-series BLDC, GMP gear motors) typically ship in 3 - 4 weeks for off-the-shelf configurations. Frameless FM1 / FM2 motors with standard windings ship in 4 - 6 weeks. Humanoid joint modules with custom reducer ratios or encoder options typically run 6 - 10 weeks for the first article. Volume programs run on their own schedule - quoted with the program.

Yes. Standard motors carry CE marking (EN 61800-3 EMC, EN 61800-5-1 safety) and UL recognition / listing in the relevant power classes. Automotive programs run under IATF 16949:2016 with PPAP support. Specify the certification package you need in the RFQ.
Ready to spec a motor?

Send us the torque, speed, voltage and envelope. We'll reply with a part number and a quote.

Whether you need a single servo, a full humanoid joint stack, or a custom-wound frameless rotor, the first message gets you into a thread with our motor engineers. Response within one business day.

Email Engineering Call +1 (314) 377-4890 Customer Portal
US Office and Warehouse

4338 Bridgeton Industrial Drive
Bridgeton, MO 63044
United States

Motor manufacturing hubs

Vietnam · Malaysia · China (Shandong)