TIANYI · motors and precision transmission

TIANYI
Specify the complete motion axis.

Tianyi's Dongguan business spans spindle motors, servo motors and planetary gearboxes. For a linear module, indexing table or robot axis, the useful question is how the selected reducer, motor connection and driven mechanism work together. Its standard spur and high-precision helical pages offer different starting points for that discussion.

Compare the two drive routes Define the axis →

Two starting points

Choose the gear arrangement before the precision grade.

The photographs below are Tianyi's own TNK and TB illustrations. They identify two families, not a universal output-shaft or motor-interface drawing.

TNK, from Tianyi's standard spur family page.

Standard spur · TYK / TNK / TYKH

The supplier describes full-complement needle bearings at the planetary gear interface and an integrated carrier/output shaft. This route is worth discussing when the machine's required accuracy, cost and load cycle permit the selected spur configuration.

Family introduction: backlash: Standard ≤8 arcmin; custom ≤5 arcmin
Published efficiency: Single stage >96%; two stages >92%
Website selector: 040 / 060 / 080 / 090 / 120 / 150 / 180

Existing spur-family directory page →

TB, from Tianyi's high-precision helical page.

High-precision helical · TA / TN / TD / TE / TS / TB

Tianyi describes helical sun and planet gearing, an integrated carrier/output shaft and a clamping motor connection. The page also identifies SCM415/420 alloy steel, DIN 6 gear accuracy and a sealed synthetic-lubricant arrangement. Treat these as the supplier's family description when agreeing the ordered specification.

Family introduction: backlash: Standard ≤3 arcmin; custom ≤1 arcmin
Published efficiency: Single stage >97%; two stages >94%
Sealing description: IP65 design, according to the supplier

Existing helical-family directory page →

The product pages do not state the test speed, load or lubrication conditions for these efficiency figures. Ask for the selected model's performance curve and duty calculation before using them in a heat or power budget.

Put the actual precision value on the quotation.

A grade code alone is not a complete specification. Tianyi's selectors expose several backlash values under the same P1/P2 labels, while their family introductions describe standard and customised versions.

Freeze the configuration

Record family, frame, actual ratio, stage count, motor adapter and output arrangement. Both pages show L1 and L2 selector bands; request the discrete ratios available in your configuration.

Write the limit and method

Write backlash in arcmin, the selected grade and measurement conditions. Agree the input/output restraint, measurement torque, temperature and whether the value applies when new or after the required life.

Agree the delivered evidence

Ask for the order-specific drawing, rating sheet and inspection record. Link the measured gearbox to its model and serial identity and define the acceptance procedure before delivery.

What to ask for in the rating sheet

Continuous torque at operating speed; repeated acceleration/deceleration peaks; emergency-stop limit; permissible radial/axial loads and overturning moment; input speed; torsional stiffness; reflected inertia; lubricant, installation position and maintenance instructions.

State the required operating point. A higher ratio changes speed and reflected inertia; it does not, by itself, establish a higher continuous torque rating.

Make the application calculable

Different mechanisms need different load information.

Linear module or rack axis

Send travel, payload, speed/acceleration profile and screw lead or pinion pitch radius. Include process force, friction, orientation and stopping events.

Identify where thrust and radial forces are carried. Supply the motor shaft/flange drawing, coupling layout and load location so the reducer and external support can be assessed together.

Rotary indexing table

Send table inertia, off-centre payload, index angle and move/dwell times. Separate torque used for acceleration from axial force and overturning moment carried by bearings.

The group also lists hollow rotary platforms and flange-output reducers. Ask which assembly provides the table support, output interface and required through-hole, rather than selecting only by a gearbox ratio.

Robot or articulated mechanism

Supply the gravity and motion load envelope across the workspace, duty cycle, joint inertia and cable routing. Define accuracy and repeatability at the driven point.

Agree reducer stiffness, support layout, brake/control scope and emergency-stop behaviour. The complete machine's positioning performance also depends on its structure, coupling, sensing and control.

Motor matching deserves its own drawing check.

The helical page describes an interchangeable motor connection plate and clamping input. Give Tianyi the exact motor model, pilot, bolt circle, shaft diameter, usable shaft length and any key or shoulder. Request the matched adapter drawing, tightening sequence and torque, alignment requirements and installation clearance.

For a combined motor-and-reducer order, define motor supply/drive compatibility, feedback, brake, speed range and responsibility for tuning. Specify who warrants the assembly and who provides the load calculation and commissioning support.

Understand the supplying business

A group portfolio and a specific gearbox order have different boundaries.

The official company page dates Dongguan Tianyi Precision Electromechanical to 2005. Its industry page lists separate spindle, motor, intelligent-technology and reducer businesses, including Jiangsu Alpha Reducer. Ask which entity contracts, manufactures, inspects and services the selected assembly.

Motor standards context

The national standards platform lists the Dongguan legal entity among the drafting organisations for GB/T 25442-2026, covering methods for determining rotating-electric-machine losses and efficiency. Published on 2 July 2026, it is scheduled to take effect on 1 February 2027. This identifies participation in a motor-test standard; it is not certification of the planetary gearbox's precision or torque.

Documents that matter for the order

Agree the manufacturing location, supplied assembly, subcontracted process controls, material and gear-process requirements, inspection scope and serial traceability. If the motor and reducer come from different group businesses, put the handover, assembly and service responsibilities in the purchase specification.

Send an axis specification, not just a motor power.

A complete brief makes the recommended gearbox and adapter easier to compare.

Prepare sourcing request

Machine mechanism, quantity and intended output motion.
Motor model, supply/drive/feedback and shaft/flange drawing.
Preferred spur/helical/right-angle/flange/platform layout.
Actual ratio, output speed, continuous torque and timed peak loads.
Inertia, external forces/moments and their application points.
Accuracy, backlash grade/value and acceptance conditions.
Environment, mounting, lubrication and maintenance access.
Supplying/manufacturing entities, inspection records and service scope.

Sources & review

Reviewed 8 October 2026. Product descriptions are attributed to Tianyi; application and procurement questions are editorial guidance.

TIANYI · standard spur planetary series ↗TYK/TNK/TYKH selector, construction, family backlash and efficiency descriptions; TNK illustration.
TIANYI · high-precision helical series ↗Families, selector grades, gearing/motor interface, efficiency and sealing descriptions; TB illustration.
TIANYI · company introduction ↗Dongguan legal entity, 2005 establishment and official address.
TIANYI · industry and group businesses ↗Named motor, spindle, automation and reducer businesses; supplier-scope context.
National standards platform · GB/T 25442-2026 ↗Motor loss/efficiency test standard, publication/effective dates and named drafting organisation.