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Positioning motors and matched drives

Stepper Motors & Drives

Two-phase hybrid stepper platforms from 20 to 86 mm, supported by matched microstepping drives, feedback, brakes, gearheads and integrated controls.

Precise positioningRepeatable accuracy
Wide range20–86 mm frame sizes
Matched solutionsDrives, gearheads, brakes & feedback
Reliable performanceBuilt for demanding applications
SDT stepper motor and matched-drive platform range
Controlled motion. Real-world solutions.Motion  |  Precision  |  Flexibility

Product architecture

One Coordinated Stepper Solution

Select the motor construction, control method and mechanical options around the operating load, speed profile and installation environment.

01

Hybrid Stepper Motors

20–90 mm platforms covering compact positioning through higher-torque industrial duties.

02

Matched Microstepping Drives

Pulse-and-direction control with supply and current ranges matched to the selected motor.

03

Integrated Closed Loop

Motor, controller and encoder packages for improved position confidence and stall detection.

04

Application Engineering

Modified windings, shafts, feedback, brakes, connectors and complete OEM subassemblies.

Representative SDT platform range

Hybrid Stepper Motor Technical Data

Standard two-phase frame coverage for preliminary selection, progressing from miniature instrumentation to higher-torque industrial motion.

SDT hybrid stepper motor range progressing from compact SD20 to higher-torque SD86 formats
SD20SD34SD35SD42SD57SD86
SeriesApprox. NEMAFrameStep angleTypical phase currentHolding torquePhase resistanceInductanceMotor length
SD20NEMA 820 mm1.8°0.4–0.8 A0.03–0.05 N·m5–10 Ω2–5 mH30–45 mm
SD34NEMA 14 class34 mm1.8°0.8–1.8 A0.10–0.35 N·m1.5–6 Ω2–8 mH25–45 mm
SD35NEMA 1435 mm1.8°1.0–2.0 A0.15–0.40 N·m1–5 Ω1.5–7 mH28–50 mm
SD42NEMA 1742 mm1.8°1.0–2.5 A0.20–0.80 N·m0.9–4.5 Ω1.4–8 mH33–60 mm
SD57NEMA 2357 mm1.8°2.0–5.0 A0.6–3.0 N·m0.3–2 Ω1.5–6 mH40–90 mm
SD86NEMA 3486 mm1.8°4.0–6.5 A4.5–12 N·m0.2–1 Ω2–8 mH75–130 mm

Selection basis: Holding torque is a static rating. Available running torque falls as speed rises and depends strongly on winding inductance, driver voltage and current, microstepping, acceleration and load inertia. SDT confirms the applicable speed–torque curve and thermal margin before final model selection.

Stepper motors and matching drivers technical dataReview the representative motor, winding, holding-torque, driver and pairing information.
Technical dataRequest Technical Data →

Complementary control

Matching Stepper Driver Classes

Microstepping control provides smoother low-speed motion and reduced resonance, but the driver must be selected from motor phase current, winding inductance and the required speed–torque curve.

SC17 Series
SC23 Series
SC34 Series
SC42 Series
SC17, SC23, SC34 and SC42 matched stepper drive range
Motor frameRecommended supplyOutput current capabilityControlMicrosteppingTypical use
20 mm12–36 VDC0.3–1.5 A peakPulse / DirectionUp to 1/16–1/256Compact instruments and light positioning
34 mm18–36/40 VDC0.5–2.2 A peakPulse / DirectionUp to 25,600–51,200 steps/revSmall automation and instruments
35 mm18–40 VDC0.5–3.2 A peakPulse / DirectionUp to 25,600–51,200 steps/revAutomation and precision axes
42 mm18–50 VDC0.5–4.2 A peakPulse / DirectionUp to 51,200 steps/revGeneral NEMA 17 motion
57 mm20–50/80 VDC0.5–5.6/7.0 A peakPulse / Direction; fieldbus optionUp to 51,200 steps/revIndustrial NEMA 23 motion
86 mm30–110 VDC or 20–80 VAC2.4–8.2 A peakPulse / Direction; CANopen optionUp to 51,200 steps/revHigh-torque NEMA 34 axes
Matching Stepper Driver Technical DataRequest the representative supply, current, control, microstepping and motor-pairing information.
Technical dataRequest Technical Data →
20 mm0.03–0.05 N·m · ~0.6 A/phase24 VDC · 1–1.5 A
34/35 mm0.10–0.40 N·m · ~1–2 A/phase24–36 VDC · 2.2–3.2 A
42 mm0.20–0.80 N·m · 1–2.5 A/phase24–48 VDC · 2.2–4.2 A
57 mm0.6–3.0 N·m · 2–5 A/phase36–80 VDC · 4.2–7 A
86 mm4.5–12 N·m · 4–6.5 A/phase60–110 VDC or AC input · 7–8.2 A

Drive selection: The current setting must suit the motor winding. A higher DC-bus voltage, within the motor and driver limits, generally improves torque retention at speed. Command interface, microstep resolution, EMC, braking energy and enclosure cooling are confirmed as part of the machine control system.

Configured for the application

Integrated Stepper Configurations

Representative motor arrangements show the available integration routes. Use the guided decisions below to connect each option to the load, motion profile and installation environment.

Representative integrated-controller, geared, holding-brake and IP65 stepper motor configurations with balanced spacing
Integrated ControllerPlanetary GearboxHolding BrakeIP65 Protection

Industries & applications

Repeatable Motion Across OEM Equipment

Stepper technology is strongest where controlled incremental movement, holding capability and practical system integration matter more than continuous high-speed operation.

Medical equipment

Laboratory automation

Packaging machinery

Printing & textile equipment

Semiconductor handling

Robotics & positioning

Pumps & dispensing

Harsh-environment machinery

Modified or newly developed

Engineered Around the Motion Profile

Share the moving load, speed and acceleration profile, positioning accuracy, duty cycle, available supply, envelope and environmental conditions. SDT can then select or configure the motor, drive and mechanical interface as one coordinated solution.

LoadMotion profileMotor sizingDrive matchingValidation

Define the appropriate stepper solution

Start with Your Motion Requirements

Share the load, travel, speed, accuracy, supply, installation envelope and duty cycle.

Send Your Requirements