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The Raydafon planetary gearbox family is split by backlash tier and positioning accuracy. BAD is the volume OEM tier. BADR and BAE target higher precision. BAF and BPG target high-rigidity servo axes. Choose BAD when you need stable supply, low unit cost and repeatable positioning.
General-purpose precision, standard backlash ≤8 arcmin, volume OEM supply, standard servo adapters.
Low backlash ≤3 arcmin, helical planetary gears, higher torsional rigidity for servo axes.
Tighter tolerances and lower noise for medical, inspection and high-repeatability axes.
High-rigidity servo gearboxes for heavy-duty CNC, robotics and continuous reversing duty.
Single-stage BAD units cover 3:1 to 10:1 and give the highest efficiency. Two-stage units extend the range to 100:1 for heavy loads or slow precise axes, at a small efficiency cost.
One planetary set inside the housing. Fewer parts, higher efficiency, lower cost. Used for fast axes, gantry drives, indexing tables and general servo positioning.
Two planetary sets stacked in the housing. Higher torque multiplication and slower output speed. Used for heavy loads, winches, slow precise axes and high-ratio servo applications.
BAD gear units ship with a bolt-on input adapter that matches the servo motor flange, bolt circle and shaft. Raydafon stocks adapters for the major servo brands so the gearbox drops onto your motor without machining.
These four points are what separates BAD from low-cost planetary units sold without factory testing or a matched motor adapter.
Helical teeth engage progressively rather than at a single point. This spreads torque across multiple teeth in mesh, reduces vibration, and keeps noise low even at high input speed. Compared with straight-cut gears, the contact ratio is higher and the mesh is quieter.
The planet gears ride on a single machined carrier instead of a welded or bolted assembly. This keeps the three planet gears aligned under reversing load, prevents tooth misalignment, and extends service life in start-stop duty cycles.
Each BAD unit ships with a bolt-on adapter machined to the servo motor flange, bolt circle and shaft keyway. There is no need to modify the motor or the gearbox to make them fit, which shortens commissioning time and eliminates alignment errors on the line.
BAD units are filled with synthetic grease and sealed at the factory. Under normal operating conditions, no oil change or re-greasing is required during the service life of the unit. This reduces maintenance load on packaging, printing and general automation lines.
These parameters apply across the BAD series unless a custom option is selected. Full dimensional drawings and motor adapter drawings are available on request.
| Parameter | BAD Series Values |
|---|---|
| Series | BAD |
| Gear type | Helical planetary |
| Reduction ratios | 3:1 – 100:1 |
| Stages | 1-stage, 2-stage |
| Standard backlash | ≤ 8 arcmin (1-stage), ≤ 12 arcmin (2-stage) |
| Single-stage efficiency | 96% – 98% |
| Two-stage efficiency | 94% – 96% |
| Rated input speed | 3000 rpm |
| Max input speed | 6000 rpm |
| Lubrication | Lifetime synthetic grease |
| Protection grade | IP65 |
| Mounting | Flange output, shaft output |
| Input interface | Bolt-on servo motor adapter |
| Operating temperature | -15°C to +40°C |
| Noise | ≤ 65 dB(A) |
BAD precision planetary gear units are used wherever a servo motor needs more torque or lower output speed and the positioning demand is at standard backlash level.
Send the driven load, required output speed, servo motor drawing and backlash class. Raydafon will confirm the ratio, stage count and adapter.
Provide the driven load torque, inertia and the required output speed. This defines the ratio and stage count.
Standard ≤8 arcmin covers most automation. If the axis needs tighter positioning, choose the BADR precision tier.
Send the servo motor shaft diameter, flange size, bolt circle and keyway drawing. Raydafon will match or machine the adapter.
Every BAD unit is tested for backlash, noise, vibration and no-load running before packing. Test reports and material certificates are available.
Common questions about backlash, ratio, motor compatibility, service life and OEM supply.
Provide load torque, output speed, backlash class, mounting type and servo motor drawing. Raydafon will confirm the correct BAD ratio, stage count and adapter, and reply with a factory-direct quotation within 24 hours.
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Luotuo Industrial Area, Zhenhai District, Ningbo City, China
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