Reducer
Why choose us
Incoming material and process control:
Planetary gears are cut from 20CrMnTi and carburized and quenched, worm housings are aluminium alloy die-castings, and the process is monitored stage by stage rather than only at final inspection. The material and heat-treatment record travels with the unit.
Tolerance and accuracy verification:
Backlash and return clearance are re-measured at the output end under rated torque ±2%, and each unit is confirmed against its declared class: ≤3 arcmin standard, ≤1 arcmin in the high-precision planetary type. Worm units follow the published Q/MD1-2000 build.
Matching components and assemblies:
Motor, flange and reducer are quoted as one set. Three-phase asynchronous motors from 0.06 to 7.5 kW match the RV worm frames, and each planetary unit is quoted with the keyway, output shaft and ratio your axis actually needs.
Engineering and quotation response:
Send the axis load, required output speed and available mounting space. You get back a frame size, ratio and backlash class, and the same route covers single-stage, two-stage and custom shaft builds, whether the input is a servo or a stepper.
A gear reducer is the block between your motor and the axis it turns: it sets the speed, multiplies torque, and absorbs the inertia mismatch that would otherwise surface as chatter at the tool. On a router cutting aluminium that mismatch reaches the surface finish first; on a packaging line it arrives as heat. Planetary, worm and stepper-frame units each cover a different part of the job, and the right one is usually settled by backlash, duty cycle and the space around the motor flange.
How to choose a gear reducer
Backlash first, if the axis reverses under load. A planetary unit holds ≤3 arcmin as standard and ≤1 arcmin in the high-precision class, so tool-compensation cycles belong on the tighter class, while one-direction moves such as a lift or an indexing conveyor do not need it. Stepper-frame units sit looser: ≤15 arcmin at ratios of 10 and below, ≤20 arcmin above that.
Then duty cycle, because it decides heat rather than ratio. Planetaries run at 92–97% efficiency on a dual-support planetary carrier and suit continuous production lines. Worm gearboxes rely on sliding contact, which is exactly what limits their heat path and their efficiency, so treat duty cycle as a sizing input and hold lubricating oil below 85°C.
Next, fit the frame to the motor you already own. A Nema17 stepper with a 5 mm shaft goes straight onto the matching reducer input and comes out on an 8 mm shaft, with a 55 mm body at ratios of 10 and below and 66 mm above. Planetary frames run 42/60/90/115/142/180/220, and worm units from RV25 to RV130 mount on any of six faces when the flange side is already occupied.
Size the gear reducer’s torque with margin, and read the definition rather than the headline. Rated torque holds at 100 rpm output and is only the starting point: above it average life drops, and past twice the rating the unit fails. Emergency-stop torque is a separate figure, with maximum output torque set at 60% of it.
For outdoor or washdown duty, specify IP65 or IP67. The sealed planetary housing needs no grease top-up across its working life, so there is no lubrication point to reach on the machine.
Gear reducer series overview
Three families cover the range at HLTNC, and the table is the fastest way to place an enquiry.
| Series | Structure | Capacity and precision | Typical use |
|---|---|---|---|
| Precision planetary — PX42–PX130, PXW57–PXW86, 42–220 frames | Sun gear drives multiple planets; 45° helical mesh; dual-support planetary carrier | Ratio 3–1000, output torque to 2560 N·m, backlash ≤3 arcmin (≤1 arcmin high-precision), 92–97% efficient | CNC machine tool axes, robot joints, semiconductor packaging, precision test instruments |
| Worm gearbox — RV25–RV130, NMRV030–NMRV150 | Aluminium alloy die-cast square box; six-face mounting; built to Q/MD1-2000 with GB10085-88 worm parameters | Ratio 7.5–100, torque 2.6–2379 N·m, input power 0.06–7.5 kW | Industrial machinery and low-speed driven equipment |
| Nema17 reducer | Stepper-frame planetary; 5 mm input shaft, 8 mm output shaft | Body 55 mm at ratio 10 and below, 66 mm above; ≤15 / ≤20 arcmin | Small stepper-driven axes, desktop CNC, laboratory fixtures |
Key gear reducer specifications
- ▪Reduction ratio 3–1000 on the planetary frames and 7.5–100 on the worm gearboxes, whose input power spans 0.06–7.5 kW.
- ▪Backlash ≤3 arcmin standard and ≤1 arcmin in the high-precision planetary class — 3 arcmin is 0.05° of output play. Return clearance is quoted at the output end, measured at rated torque ±2%.
- ▪45° helical gearing with multi-tooth mesh raises contact area by 35%, which is where the low backlash and the quiet running both come from.
- ▪Transmission efficiency 92–97%, operating noise ≤60 dB measured at 3000 rpm input, no load, one metre from the housing.
- ▪20CrMnTi gears, carburized and quenched, on a maintenance-free life quoted over 10,000 hours.
- ▪Output torque to 2560 N·m on planetary units and 2.6–2379 N·m on worm units.
- ▪Protection class IP65 or IP67 on request; worm housings are aluminium alloy die-castings and normal oil temperature stays under 85°C.
Applications and matching parts
Where these units are working today: robot joint drives, CNC machining axes, semiconductor packaging equipment, surgical instruments, new energy generation hardware, automated assembly lines and precision testing instruments. Planetary units also serve as supporting components in lifting, excavation and transport equipment, while worm gearboxes cover general industrial machinery drives.
Pair the gear reducer with the drive it was sized against. The three-phase asynchronous motor runs 0.06–7.5 kW at 1330 r/min through an 11 mm hardened shaft, mounted as B5 vertical large flange, B14 vertical small flange or B35 vertical and horizontal, and its frame list lines up with worm units from RV025 through RV075/112B5. Before commissioning, align prime mover and reducer so the offset stays inside the coupling’s allowable compensation, then hand-turn the output — it should move freely with no binding.
Quality control you can verify
Four checks are worth writing into the order. Ask for the material and heat-treatment record covering the 20CrMnTi gears and their carburizing and quenching. Ask for backlash and return clearance as re-measured at the output end under the ±2% rated torque condition used in the spec. Worm units are built to Q/MD1-2000 with worm gear parameters taken from GB10085-88, which gives you a published standard to audit against. And because the planetary housing is sealed for life, seal integrity plus a free hand-turn are the two checks that matter before the gear reducer goes onto the machine. Replacement parts are run in and load-tested before formal use.