Gearboxes & Speed Reducers
Worm, planetary, helical and right-angle reducers.
Also searched as: speed reducerplanetary gearboxworm reducerright angle gearbox
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Speed Reducer
Frame: 180TCRatio: 25:1Worm Center Distance: 2.38 inch
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7.5KW Worm Gear Reducer NMRV150
Power: 7.5 kWType: Worm
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All Metal Gear box Speed Reducer For 31zy 555 3650 DC Motor
Speed Ratio: 670:1
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Circular Speed Increaser/Reducer Double Shaft PLS56 Planetary Gear Box
Diameter: 56mmShaft: DoubleType: Planetary
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HLTNC NMRV040 Worm Gear Reducer 5:1 to 100:1 Ratio 14mm Input Shaft for Nema 24 34 Stepper Motor
Input Shaft Diameter: 14 mmMotor Compatibility: Nema 24, Nema 34Reduction Ratio: 5:1 to 100:1Type: Worm
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High Precision Planetary Gearbox Speed Reducer for 42
Type: Planetary
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Metal Gear Reducer Speed-up Box Accelerator
Ratio: 1:28
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Nema 24 Planetary Gearbox Motor Speed Reducer
NEMA Size: 24
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Planetary Speed Reducer PX80 for Nema32 Motor 3-10
NEMA Size: 32Type: Planetary
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RV030 Worm Gearbox Speed Reducer
Ratio: 5:1 to 80:1Type: Worm
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Worm DC Motor Gearbox
Output Diameter: 14mmRatio: 5:1Type: Worm
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Worm Gear Reducer RV40 Single/Double Output Shaft
Output Shafts: Single/DoubleType: Worm
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Worm Reducer Gearbox Gearmotor
Type: Worm
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Worm Reducer NMRV50 with 25mm Output Shaft
Output Shaft Diameter: 25 mmType: Worm
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Worm Speed Reducer Shaft Alloy Steel RV30 Motor
Motor Size: 90mm
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About gearboxes & speed reducers
Gearboxes and speed reducers are mechanical power transmission devices that modify torque and rotational speed between a prime mover and a driven load. They typically consist of a series of gears enclosed within a housing. Key types include worm, planetary, helical, and right-angle configurations. Worm gearboxes offer high reduction ratios in a compact footprint, often providing self-locking characteristics. Planetary gearboxes provide high torque density and coaxial input/output shafts. Helical gearboxes are known for their efficiency, quiet operation, and ability to handle high loads. Right-angle gearboxes, including bevel and worm types, reorient the drive axis by 90 degrees. Selection parameters include reduction ratio (e.g., 5:1 to 100:1), input and output torque ratings (Nm), input speed (RPM), backlash (arcmin), efficiency (%), and mounting orientation (e.g., foot-mounted, flange-mounted, shaft-mounted). Housing materials commonly include cast iron, aluminum alloys, and stainless steel, with gear materials typically being hardened alloy steels such as 42CrMo4 or 17CrNiMo6. Finishes vary from standard painted surfaces to specialized coatings for corrosive environments or food-grade applications.
How to choose
When selecting a gearbox, first define the required output torque and speed, and the available input speed from the motor. This determines the necessary reduction ratio and torque capacity. Second, consider the spatial constraints and desired shaft orientation to choose between inline (helical, planetary) or right-angle (worm, bevel) designs. Evaluate the application's duty cycle and shock loading to ensure the gearbox's service factor is adequate. Third, assess the required precision and backlash specifications; planetary gearboxes often offer lower backlash for precise positioning. Finally, review environmental factors such as temperature, potential for contaminants, and washdown requirements, which will dictate housing materials, sealing, and lubrication type.