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BAB precision planetary gear units are the standard precision tier of the Raydafon planetary gearbox family. Helical planetary gears run quieter than straight-cut gears, the one-piece planet carrier holds alignment under reversing load, and lifetime synthetic grease removes the need for oil changes. Standard backlash is ≤5 arcmin, ratios cover 3:1 to 100:1, and each unit ships with a bolt-on servo motor adapter matched to the motor flange and shaft.
A planetary gear unit uses three or more planet gears orbiting a central sun gear inside a ring gear. Torque enters through the sun gear, the planets distribute it across multiple teeth, and the one-piece carrier delivers it to the output shaft. This multi-tooth contact is why a planetary gearbox has higher torque density than a parallel-shaft gearbox of the same size.
Input shaft drives the central sun gear. Helical teeth engage progressively, which lowers noise at high input speed.
Three or more planet gears share the load, so each tooth carries less torque and the mesh stays stable.
One-piece carrier delivers torque to the output shaft. Single-piece construction keeps the mesh aligned under reversing load.
Ring gear absorbs the reaction torque. Helical mesh plus ground teeth keep backlash low and repeatable.
BAB units use helical planetary gears instead of straight-cut gears. Helical teeth engage progressively rather than at a single point, which spreads torque across more teeth in mesh, reduces vibration, and keeps noise low even at high input speed. This is important on packaging, labeling and printing lines where several gearboxes run next to each other.
Many low-cost planetary gearboxes use a welded or bolted planet carrier. Under reversing load, those joints can shift and misalign the planet gears, which shortens the mesh life and degrades positioning accuracy. BAB uses a single machined carrier, so the planet gears stay aligned even under frequent direction changes.
Every BAB unit ships with a bolt-on input 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. Raydafon stocks adapters for the major servo brands, so most orders ship without waiting for a custom drawing.
BAB 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. IP65 protection keeps dust and low-pressure water spray out of the gear housing, so the gearbox can be used in packaging, food-processing and outdoor solar tracker installations.
These parameters apply across the BAB series unless a custom option is selected. Full dimensional drawings and motor adapter drawings are available on request.
| Parameter | BAB Series Values |
|---|---|
| Series | BAB |
| Product tier | Standard precision |
| Gear type | Helical planetary |
| Reduction ratios | 3:1 – 100:1 |
| Stages | 1-stage, 2-stage |
| Standard backlash | ≤ 5 arcmin (1-stage), ≤ 8 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) |
BAB precision planetary gear units are used wherever a servo motor needs more torque or lower output speed and the positioning demand is at standard precision level.
Filling, sealing, labeling, cartoning and film tension lines.
Pick-and-place heads, gantry axes, rotary indexers and feeder drives.
Transfer units, sorters, hoists and light winch drives.
Web tension rollers, registration axes and cutting cylinders.
Solar tracker drives, panel cleaning brushes and battery handling.
Tool changers, feed rollers and positioning axes on shop-floor machines.
The Raydafon planetary gearbox family is split by backlash tier and positioning accuracy. BAB is the standard precision tier, which covers most general servo axes. Choose BABR when the axis is under heavy reversing load, BAE when the axis needs ultra-low backlash, and BAF or BPG when the axis needs very high rigidity.
Standard precision tier, backlash ≤ 5 arcmin, helical planetary gears, matched servo motor adapter, volume OEM supply.
Reinforced output bearing and wider carrier. Backlash ≤ 3 arcmin, built for reversing duty and offset loads.
Tighter tolerances and lower noise. Backlash ≤ 1 arcmin for measuring, medical and inspection axes.
Every BAB unit is tested for backlash, noise, vibration and no-load running before packing. Test reports and material certificates are available. Third-party inspection can be arranged.
ISO 9001:2015 certified quality management from raw material to final test. Products comply with GB, IEC and CE standards.
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 BAB 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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