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This pair typically utilizes a high-carbon, hardened steel worm or pinion mated with a specialized phosphor-bronze gear. This material combination is a mechanical necessity for hig...
This pair typically utilizes a high-carbon, hardened steel worm or pinion mated with a specialized phosphor-bronze gear. This material combination is a mechanical necessity for high-reduction drives because the bronze gear acts as a self-lubricating, sacrificial surface that reduces friction and prevents "galling" or welding under high pressure.
| Attribute | Value |
|---|---|
| Gear Type | Worm & Wheel / Pinion & Gear |
| Material (Driving) | Hardened Alloy Steel (20MnCr5 / EN31) |
| Material (Driven) | Phosphor Bronze (C90700 / PB2) |
| Reduction Ratio | 10:1 to 100:1 (Customizable) |
| Surface Hardness | 58-62 HRC (Steel Member) |
| Additional Information | |
|---|---|
| SKU | 1 |
| Country of Origin | India |
| Customisable | No |
This gear pair is the gold standard for heavy-duty industrial machinery. In conveyor systems and elevators, it provides the high-reduction ratios needed to move heavy loads at controlled, safe speeds. It is an essential component in rotary actuators and valve positioners within chemical plants, where precise, slow-speed movement is critical.
| Production Lead Time | 8-14 Days |
| Available Stock | In stock |
| Sample Availability | No |
| Shipping Internationally | Yes | |
| Methods |
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| IncoTerms |
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| Port of Dispatch | -- | |
| Packaging Type | -- | |
| Units per Package | -- | |
| Barcode / HSN / GTIN / UPC | -- | |
| Dispatch Lead time | Ships in 7 Days |

When gears slide against each other at high reduction ratios, steel-on-steel contact creates immense heat and can cause the metal to weld together (seize). Bronze has a low coefficient of friction against steel, allowing it to "wear in" perfectly and handle the sliding motion safely.
In high-reduction ratios (usually above 30:1), the friction angle is such that the output gear cannot turn the input shaft. This is a vital safety feature for lifting applications as it prevents the load from falling if power is lost.
While the bronze gear is designed to be the "wear part," if properly lubricated with the correct grade of gear oil, these pairs can last for decades in industrial environments.
No. High-reduction bronze pairs are specifically designed for high-torque, low-to-medium speed applications. For ultra-high speeds, different gear geometries like helical or spur gears are typically used.
Maintenance is required if you notice an increase in backlash (play between teeth), excessive heat at the gearbox casing, or if the oil contains fine bronze particles during a routine change.
Shipping fee and delivery date to be negotiated. Contact supplier now for more details.