Micro
Motion Talk to an engineer

Give the envelope, the speed and the load.

The engine ranks what the published catalog can actually deliver, and names the constraint when it cannot. It runs on the server, so the answer is in this page with JavaScript off. Nothing is stored, and no account is created before there is something worth saving.

What the published set covers

The engine ranks these configurations. Nothing else is offered as a recommendation.

Before you state anything, this is what the published set can do. A requirement outside these bounds is a configuration question, and the page will say so rather than round the answer.

The published set: 32 reviewed gearmotor configurations, catalog 2026-08-18.public.1.
Parameter Low High
Envelope diameter (mm)837
No-load output speed (rpm)10.4533.2
Continuous output torque (mN·m)3.4319.2
Rated winding voltage (V)2.424

Published windings: 2.4, 3, 4.5, 6, 9, 12, 24 V. Gear types: planetary and spur. Feedback is published as a reviewed fit on the platforms that carry it, and total length then includes the feedback stack.

State a requirement below and the same page returns the ranked answer, computed on the server. The address of the result carries every value you typed.

Engine
selector-1.0.0
Weights
weights-2026-08-18.a
Catalog data
2026-08-18.public.1
Considered
32 published configurations

Every figure above is shown in the units of the reviewed record: mm, rpm, mN·m. The unit system setting governs how the values you type are read, not how the answer is published.

A result gets its own address. Every value you state ends up in the link, so saving a selection means keeping the link. No account is created.

State the requirement

Only state what is actually constrained. An empty field is not a constraint, and the engine will not invent one.

Units

Type a unit on any value and it is read as written. A bare number takes the default below.

Sets the default unit for a bare number. Writing "0.63 in" or "10 oz-in" always overrides it.

Envelope

The space the motor has to live in, measured on the assembled stack.

Largest envelope diameter the machine allows, in millimetres unless you write a unit. Published set covers 8 to 37 mm.

Motor body plus gearhead, in millimetres unless you write a unit. Shaft extension and mounting features are on the controlled drawing, not in this number.

Electrical

The supply the motor sees at its terminals, not the bus voltage upstream of a driver.

Rated winding voltage. A published winding within 10 percent is treated as compatible. Published windings: 2.4, 3, 4.5, 6, 9, 12, 24 V.

Output speed

Speed at the gearhead output shaft. Leave one end open if only one end matters.

Slowest the machine can accept, in rpm unless you write a unit. Checked against speed at the rated point, not no-load.

Fastest the machine can accept, in rpm. A configuration more than twice this at its rated point is excluded: the reduction is wrong for the job.

Load

Torque at the output shaft. Reflected inertia and friction belong in these numbers.

The load carried for the whole run, in millinewton metres unless you write a unit. Checked against the continuous rating with no thermal credit.

Breakaway, acceleration or jam load, in millinewton metres unless you write a unit. Checked against the gearhead rating, which is a limit.

How long the peak is held, in seconds unless you write a unit. Anything held longer than 30 seconds is sized as continuous.

Percentage of the cycle under load. Shown as RMS margin only. No thermal credit is taken, because the thermal time constant is not published.

Mechanical requirements

What the drivetrain has to be, beyond the numbers it has to hit.

Ranked, not enforced. A preference does not change what a shaft can deliver, so a fitting configuration is never hidden.

Required means a reviewed feedback fit must exist for the platform. The published added length is included in total length.

Backlash is not a published figure. Critical raises the weight on gear type and stage count, and makes measurement the next test.

Side load at the shaft, in newtons unless you write a unit. Shaft load capacity is not published, so this is reported as an unknown, not checked.

Thrust along the shaft, in newtons. Reported as an unknown for the same reason.

Life and environment

What the unit has to survive, and for how long.

Hours at the stated duty. Life is never inferred from torque margin, so this drives the test recommendation, not the ranking.

Anything other than controlled indoor adds qualification burden and lowers confidence, because no environmental qualification is published.

Program

What the answer has to fit commercially. This layer ranks; it never excludes.

Units per year, your best current estimate. Used to weigh build complexity against sample availability.

When the decision has to be made. Sets how much of the answer has to rest on stock samples rather than a configured release.

Shifts the blend of the three ranking layers. It does not relax a single hard constraint.

Nothing is stored and no account is created. The result is the address of this page, so the link is the saved selection.

How the ranking works

Three layers, kept apart on purpose, so a commercial preference can never quietly relax an engineering limit.

  1. Layer 1, hard constraints

    Diameter, total length, winding voltage, output speed band, continuous output torque, the gearhead output torque rating, and required feedback. A violation excludes the configuration, and the reason is shown next to it.

  2. Layer 2, engineering margin

    Starting margin, continuous margin, peak duration, an RMS thermal screen, efficiency, and the backlash implication of the gear type and stage count. All of it is scaled by confidence, so a calculated or typical value never outranks a measured one at equal margin.

  3. Layer 3, program fit

    Sample availability, lead-time band, qualification burden and platform maturity. This layer ranks. It never excludes, and it never relaxes layer one.