- SAINER
- Xianning City,Hubei,China
- lead time: 30-50 days
- a monthly capacity of 10 million
Electric Shunting Locomotive Axle Gearbox
This electric shunting locomotive axle gearbox features a two-stage spiral bevel-helical hard tooth surface transmission structure, tailored for heavy-load plant and mining traction. Perfectly matching AC/DC and battery electric locomotives, its core gears use 20CrMnTi alloy steel. Carburized, quenched, and double-sided ground to 56–62HRC, they offer exceptional impact and wear resistance.
The housing uses integrated HT250 high-strength cast iron for high rigidity and oil leakage prevention. With an IP54 sealing grade, it adapts well to dusty, humid environments in steel mills and chemical parks. Splash or forced circulation lubrication ensures stable heat dissipation and low temperature rise during continuous low-speed heavy-load operations.
Featuring a compact axle-hung mounting structure, this gear unit allows easy disassembly for daily maintenance. Gear ratios are customizable for 5 to 100-ton electric shunters. Widely used in steel plants, underground mines, and port warehouses, it serves as a reliable heavy-duty power transmission solution for electric rail transport vehicles.
Heavy-Duty Axle-Hung Bevel Helical Gearbox for Electric Industrial Locomotives and Plant Shunters
The Pain Point: Standard gearboxes are often designed for continuous high-speed rotation. When applied to yard shunters that operate at low speeds with maximum traction effort, these units suffer from inadequate oil splash, leading to localized overheating, lubricant breakdown, and premature gear scoring.
Our Solution: This Low Speed Electric Yard Locomotive Axle Reducer is engineered with a specialized two-stage spiral bevel-helical hard tooth surface transmission structure. Unlike generic designs, this configuration ensures effective lubrication distribution even at minimal RPMs. Combined with an optional forced circulation lubrication system, it guarantees stable heat dissipation during continuous heavy-load traction, preventing thermal failure in frequent start-stop cycles.
The Pain Point: Shunting operations involve constant direction changes and heavy impacts. Conventional gears with lower hardness or precision often experience pitting, spalling, or tooth breakage under these shock loads, leading to costly unplanned downtime.
Our Solution: We utilize 20CrMnTi alloy steel for all gears and shafts, subjected to carburizing quenching and double-sided grinding. Achieving a tooth hardness of 56–62 HRC and Precision Class 6, this Battery Electric Locomotive Wheelset Gearbox offers superior impact resistance. The hardened surface resists deformation under shock loads, significantly extending service life in harsh mining or steel plant environments.
The Pain Point: Dust, moisture, and chemical particulates in factories and mines can rapidly degrade internal components if sealing is insufficient. Standard seals often fail, allowing contaminants to mix with lubricant, causing abrasive wear.
Our Solution: Our Industrial Electric Railcar Axle Drive Gear Unit features a robust sealing system comprising multi-lip skeleton oil seals and heavy-duty rolling bearings, achieving an IP54 sealing grade. Integrated with a high-rigidity HT250 cast iron housing, this design effectively isolates the internal mechanism from external dust and humidity, ensuring reliable operation in chemical parks and open-pit mines.
| Parameter | Specification | Value Translation for Buyer |
|---|---|---|
| Gear Material | 20CrMnTi Alloy Steel | Provides high core toughness and surface hardness, reducing replacement frequency by resisting fatigue failure. |
| Tooth Hardness | 56–62 HRC | Ensures the gearbox can handle peak torque spikes during heavy shunting without surface pitting. |
| Manufacturing Precision | Grade 6 (Double-Sided Grinding) | Reduces meshing noise and vibration, lowering energy loss and improving transmission efficiency. |
| Housing Material | HT250 High-Strength Cast Iron | Offers superior damping capacity to absorb shocks from track irregularities, protecting internal gears. |
| Sealing Rating | IP54 | Protects against dust ingress and water splashes, critical for outdoor or wet workshop applications. |
| Mounting Type | Axle-Hung | Simplifies the drivetrain layout, reducing unsprung mass and easing maintenance access. |
| Speed Limit | < 100 km/h | Optimized gear ratios for traction rather than speed, maximizing pulling power for loads up to 100t. |
| Lubrication | Splash + Forced Circulation (Optional) | Adaptable cooling solution ensures longevity whether operating in intermittent or continuous duty cycles. |
Vs. Standard Soft-Tooth Gears: Many competitors use medium-carbon steel with normalized treatment (approx. 200-250 HB). While cheaper initially, these gears deform under the high torque of a 50t+ shunter. Our 20CrMnTi carburized gears (56-62 HRC) provide 3x the surface durability, specifically validated for the high-impact nature of shunting.
Vs. Welded or Split Housings: Some manufacturers use welded steel housings to cut costs. These are prone to distortion under heat and stress, leading to bearing misalignment. We use integrated HT250 casting, which provides inherent rigidity and vibration damping that welded structures cannot match, ensuring precise gear alignment over decades of use.
Vs. Generic Sealing: Standard lip seals often leak after a few thousand hours in dusty mines. Our multi-lip skeleton oil seal arrangement creates multiple barriers against contamination, specifically tested for the high-dust environments of cement and coal handling facilities.
Steel Mill Slab Transfer: In high-temperature, high-dust steel plants, locomotives must move molten metal ladles and heavy slabs. Our gearbox handles the extreme thermal radiation and heavy static loads during frequent stops, relying on its high-rigidity housing and heat-resistant lubrication options to maintain integrity.
Underground Mining Haulage: Battery electric locomotives in narrow-gauge tunnels face damp, corrosive conditions. The IP54 sealed Battery Electric Locomotive Wheelset Gearbox prevents moisture ingress while delivering the high starting torque needed to pull ore cars up gradients from a standstill.
Port Container Logistics: Port shunters operate continuously with heavy container loads. The Industrial Electric Railcar Axle Drive Gear Unit supports the relentless cycle of acceleration and braking, with precision-ground gears minimizing energy loss and maximizing battery range for electric units.
Material Certification: All 20CrMnTi steel batches undergo spectrographic analysis and heat treatment lot testing to verify hardness depth and core toughness.
Precision Verification: Every gear set is tested for contact patterns and backlash according to ISO 1328 Class 6 standards before assembly.
Sealing Integrity: Random sampling of assembled units undergoes pressure testing to validate IP54 compliance before shipment.
Design Scope: Strictly limited to <100km/h applications, ensuring no component is ever undersized for high-speed passenger use, maintaining a focused safety factor for industrial traction.
Customization Range: Successfully deployed in configurations ranging from 5-ton light shunters to 100-ton heavy haulers, demonstrating versatile torque capacity.
Durability Metrics: The combination of Class 6 precision and 60 HRC hardness typically results in a maintenance-free operational lifespan significantly exceeding industry averages for similar duty cycles.
Adaptability: Proven compatibility with both AC and DC traction motors, making it a future-proof choice for facilities upgrading from legacy DC systems to modern AC drives.
No. This Electric Plant Shunter Axle Gearbox is strictly designed for speeds below 100km/h. It is optimized for high torque at low speeds. Using it for high-speed EMU or metro applications would violate safety parameters and void warranties.
Yes. We understand that a 10-ton shunter has different torque requirements than a 100-ton hauler. We offer customizable gear ratios to match your specific locomotive tonnage and motor characteristics, ensuring optimal tractive effort.
Standard models use splash lubrication which is sufficient for most shunting. However, for extreme continuous duty cycles, we offer an optional forced circulation lubrication system. This actively pumps oil to critical contact points, ensuring stable temperatures even under maximum load.
Absolutely. As a mechanical transmission component, this Battery Electric Locomotive Wheelset Gearbox interfaces with the wheelset and motor mount. It is fully compatible with both traditional DC traction motors and modern AC induction motors commonly found in new industrial railcars.
The axle-hung design is chosen for its simplicity. Daily maintenance primarily involves checking oil levels and inspecting the multi-lip seals for leaks. The compact structure allows for easy disassembly and inspection of gears and bearings without removing the entire traction motor, reducing workshop time.
