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Zhejiang Beitto Transmission Technology presents a range of precision planetary and harmonic reducers on its official site. AHB and AHL are two distinct inline planetary series with separate housing-size lists and standard backlash grades. The company-hosted catalog images include model-code diagrams, reductions for one- and two-stage builds, cutaway views and product photographs. AHB is the tighter-backlash choice in the two documented catalog sections; AHL offers a different size envelope. The figures are series selection data, not a guarantee that every frame and ratio has the same rated torque. Buyers should request the relevant frame sheet and a motor-adapter drawing.

TECHMECH is the gearbox brand presented by Wuxi Tengma Precision Transmission. Its official product catalogue covers multiple precision planetary series, including the right-angle TST and inline TF designs documented here. The pages publish output-frame sizes, ratio choices and backlash figures, allowing a buyer to narrow a configuration before asking for a dimensional drawing. TST uses a right-angle layout and can be paired with another gear stage; TF is an inline precision reducer designed for smooth servo-drive operation. Each series must be specified by frame and stage arrangement rather than combining limits from separate configurations.

Dongguan Tianyi Precision Electromechanical is identified on the Tianyi group website, which presents spindle motors, servo motors and planetary gearboxes. Its reducer catalog distinguishes standard spur families from higher-precision helical families, right-angle units, flange-output units and rotary platforms. The two product pages below retain the official design and efficiency information while avoiding a false model-level torque claim. Some selector choices on the website have different precision limits from the family introduction, so the exact frame, stage and grade require confirmation. The group lists several member companies; confirm the manufacturing and contracting entity for the selected gearbox when requesting a quotation.

Taizhou Jiaoxing Transmission Equipment publishes precision duplex worm reducers and helical-hypoid drives. The JDLB family offers an adjustable worm mesh for applications where backlash control matters, while JHG combines a hypoid first stage with further gearing for a different efficiency and installation trade-off. Official pages provide frame selections, ratio information and mechanical interface notes. This profile uses the public technical descriptions and imagery; restricted downloads have not been treated as verified source data. Ask for the exact model’s torque-speed rating and mounting drawing, particularly where a low-backlash unit is being selected for a rotary positioning axis.

Zhejiang Tongyu Variable-Speed Machinery publishes precision transmission products under its TONGYU/JMC identity. The TAB and TAD precision planetary families use helical alloy-steel gears with surface hardening and precision grinding. The official pages distinguish the number of available frame sizes and the single- and double-stage ratio selections for each family. Both pages state a maximum rated torque of 2,000 Nm across the range, without a frame-by-frame rating table. This profile therefore keeps that value at series level. For a servo-axis quotation, supply the motor flange, shaft dimensions, acceleration cycle and permissible lost motion so the manufacturer can identify the exact assembly.

Hangzhou Jiacheng Machinery manufactures worm and gear reducers and publishes products under the Chen Chao name. Its official range includes JCR, JCF, JCK and JCS geared drives, WP and NMRV worm units, and SWL screw jacks. The company website identifies operations dating to 1992 and a Hangzhou Dajiangdong location. The JCR and NMRV pages offer numerical family envelopes for ratios, power and output torque, with separate single- and double-stage limits for NMRV. These are catalog boundaries rather than interchangeable operating points. Buyers should obtain the full type code, installation drawing and duty calculation for the intended application.

Changzhou Nanpeng Machinery publishes planetary gearboxes under the DESBOER brand. Its NB inline and NBR right-angle families have distinct installation layouts and separately documented rating tables. Official catalog sheets cover ratio-dependent torque, rated and maximum input speeds, precision grades, bearing loads, efficiency, mass and operating temperature. The examples below use NB060 and NBR090, with single-stage torque values mapped to individual ratios. Precision-grade limits are kept separate from generic marketing claims. Provide the full motor designation, required output interface and dynamic load profile when requesting a selection; a shared ratio does not establish mechanical interchangeability between NB and NBR.

Nuodun (Hangzhou) Intelligent Equipment specializes in linear transmission and related gear drives. Its catalog includes screw jacks, bevel turning units, planetary reducers and worm reducers. The NDP documentation provides actual-ratio and torque tables at a stated input speed, while the RV page gives a general worm-reducer envelope and input/output connection options. The NDP001 example below preserves the difference between nominal and actual reduction ratio and separates thermal power from mechanical torque. This distinction is useful when comparing an industrial planetary unit with a compact RV worm drive. Confirm the complete assembly and lubrication arrangement with Nuodun for the intended operating cycle.