Wanshsin WVRB planetary gearbox

Key specifications

Detailed figures vary by model. Ask an engineer for the variant you need.

Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.

Wanshsin WVRB replacement and alternative options

Use these supply-network options as a starting point for an engineering check. We can also help source the original Wanshsin part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.

Planetary gearbox

APEX Dynamics AB / ABR

Same product type; specifications need checking

Apex Dynamics low-backlash planetary (inline AB, right-angle ABR), a dependable lower-backlash step up from economy ranges.

Check this option and request pricing →View product details →

Planetary gearbox

APEX Dynamics AD / ADR / ADS

Same product type; specifications need checking

Apex Dynamics high-precision helical planetary with a one-piece stainless planet cage and very short length; ADS adds a keyed input shaft for belt pulley or coupling drive.

Check this option and request pricing →View product details →

Planetary gearbox

APEX Dynamics GL / GLS

Same product type; specifications need checking

Apex Dynamics AGV planetary with a rotating housing so a drive wheel or pulley can mount directly over it; GLS takes shaft input for belt drive.

Check this option and request pricing →View product details →

Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.

Options

• inline
• right-angle (WVRBR)

Typical applications

What a planetary gearbox is

A planetary gearbox reduces speed and multiplies torque using a central sun gear driven by the motor, several planet gears on a carrier, and an outer ring gear. Load is shared between the planets, so the gearbox is compact, coaxial and torque-dense. A single stage typically gives ratios of about 3:1 to 10:1, and stages are combined for higher ratios. Precision servo planetaries use ground helical or spur gears, preloaded output bearings and a motor adapter flange, with backlash typically a few arcminutes or less.

When engineers choose a planetary gearbox

Choose a planetary gearbox for most servo and stepper axes that need more torque, lower reflected inertia or a better inertia match. It is efficient, typically above 95% per stage, stiff and widely available in standard frames. The trade-offs are backlash, which is low but not zero, and limited single-stage ratio. For zero backlash in a compact joint, a strain-wave gear suits better. For very high shock loads, a cycloidal reducer may be more robust.

How to specify the Wanshsin WVRB

Send these with your enquiry and an engineer can confirm the right WVRB variant:

• Ratio and output speed (:1, rpm)
• Nominal and peak output torque (Nm)
• Emergency stop torque (Nm)
• Backlash (arcmin) and torsional stiffness (Nm/arcmin)
• Radial and axial output loads (N)
• Motor flange, shaft diameter and length (mm)
• Duty cycle, mounting orientation and lubrication

Common mistakes to avoid

• Sizing on motor torque times ratio without checking acceleration torque and service factors
• Ignoring the input speed limit at high motor speeds
• Mounting a pulley or pinion that overloads the output bearing
• Forgetting the gearbox efficiency and heat in continuous duty

Wanshsin WVRB: frequently asked questions

Further reading: How to select a planetary gearbox · Harmonic vs planetary vs cycloidal · Gearboxes and harmonic drives

Often compared with

Engineers specifying this series often compare it with:

Other planetary gearbox series