Worm Gearbox Manufacturer — Stable Transmission, Reasonable Price
Raydafon is a China-based worm reducer factory. We match equipment needs accurately and supply stable quality at reasonable prices.
Housing & Structure
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One-piece high-strength aluminum alloy or cast iron housing
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Strong, corrosion-resistant
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Suitable for high humidity, high dust, frequent vibration
Gear & Worm
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Worm wheel: high-performance copper alloy
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Worm: high-quality alloy steel
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Precision ground and heat treated
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Smooth meshing, low noise, high efficiency
Testing & Lubrication
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No-load running test
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Oil seal sealing test
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Tooth surface contact test
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Synthetic grease or gear oil, -20℃ to +80℃
Our worm gearboxes serve domestic machinery manufacturers and export to Europe, America, Southeast Asia, and the Middle East. We follow the principle of "more reliable transmission and more efficient service." Contact us for a quote.
How To Adjust Backlash In Worm Gearbox
Backlash is the small gap between worm and worm wheel tooth surfaces. It affects stability, efficiency, and service life. Raydafon gearboxes are pre-adjusted, but backlash can change during long-term use or reinstallation.
1
Power off and unload Turn off the reducer and fully unload the load to avoid rotation risk. Clean the surface before disassembly.
2
Check the adjustment structure For NM RV series worm gear reducers, most models have an eccentric input shaft seat or flange preload mechanism for fine adjustment.
3
Adjust meshing depth Loosen the worm shaft fixing bolts at the input end. Adjust the eccentric sleeve or bearing seat to change meshing depth, or change gasket thickness to fine-tune axial distance.
4
Test run Run a no-load test first, then a full-load test. Do not over-tighten — it causes heat, wear, and early damage.
Recommended backlash range
0.08 mm – 0.15 mm
Ensures good meshing efficiency without jamming or increased wear.
If gear side wear is severe, bearings are loose, or the housing is deformed, stop and replace parts or contact Raydafon technical support. All gearboxes pass tooth surface contact detection and no-load operation tests before shipment. We also provide remote technical assistance, including video guidance and structural drawing analysis.
How To Calculate Worm Gearbox Ratio
Transmission ratio (reduction ratio) is a key parameter when selecting or designing a worm gearbox. Confirm it before selecting a model.
Basic Formula
Transmission ratio = worm wheel teeth ÷ worm heads
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Worm Wheel Teeth
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Worm Heads
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Transmission Ratio
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Output Speed
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40
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1 (single)
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40:1
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1/40 of input
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40
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2 (double)
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20:1
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1/20 of input
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Worm wheel teeth are marked on the nameplate or drawing — common values are 30, 40, 50, 60. Worm heads are usually 1 or 2, indicating how many teeth the worm wheel rotates per turn of the worm.
Raydafon offers standard ratios from i=7.5 to i=100. Multi-stage combinations are available — for example, 40:1 first stage plus 5:1 second stage gives a total ratio of 200:1.
Selection note: Too large a ratio lowers efficiency and increases size. Too small a ratio gives insufficient output torque. Also consider output torque, efficiency loss, and working cycle.
Raydafon can recommend the right model and ratio based on your input power, operating speed, and load characteristics. Our technical team provides complete selection calculation services. Contact us for technical support and customized suggestions.
