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EP-CTD3150 Planetary Track Drive Gearbox ?? 31,500 Nm
Brevini CTD3150 Compatible Replacement | EVER POWER
The EP-CTD3150 enters EVER POWER’s mid-to-heavy track drive range, delivering 31,500 Nm output torque in a sealed, brake-integrated planetary housing. Designed as a direct replacement for the Brevini riduttori CTD3150, this unit is optimised for 18-25 t tracked construction and earthmoving equipment where reliability over long operating hours is the primary purchasing criterion.
Product Overview
The EP-CTD3150 primarily serves 18-25 t hydraulic excavators, large tracked dumpers, tracked road planers and medium crawler cranes. Its 3-stage planetary arrangement supports a ratio range of 25:1 to 130:1, and its cross-roller output bearing handles the unusually high moment loads generated when large excavators push lateral force against a trench wall during slope grading operations.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | EP-CTD3150 |
| Replaces | Brevini riduttori CTD3150 |
| Max Output Torque | 31,500 Nm |
| Gear Stages | 3 |
| Ratio Range | 25:1 – 130:1 |
| Max Input Speed | 2,800 rpm |
| Efficiency | >= 96% per stage |
| Backlash | <= 10 arcmin |
| Output Bearing | Cross-roller slewing ring |
| Housing Material | Ductile Iron GGG50 |
| Lubrication | Synthetic ISO VG 220 (factory filled) |
| Protection Class | IP68 |
| Operating Temp. | -30 degC to +85 degC |
| Approx. Weight | ~78 kg |
| Brake | Spring multi-disc / hydraulic release |
Working Principle
Three cascading planetary stages reduce speed and multiply torque from the hydraulic travel motor. The cross-roller slewing ring output bearing is the key structural element ?? it replaces the standard back-to-back tapered roller arrangement used in lighter units and provides equivalent axial, radial and overturning moment capacity in a narrower axial space. This allows the EP-CTD3150 to fit the same track frame pocket as the Brevini CTD3150 while handling the higher moment loads of large excavator grading operations.
Core Advantages
|
▲ Cross-Roller Output Bearing
Handles combined axial, radial and moment loads from trench-wall lateral forces without separate thrust bearing. |
▲ 25:1 – 130:1 Ratio Range
Wide range covers both fast tramming speed and maximum grading torque in one platform. |
|
▲ IP68 Deep-Submersion Seal
Tested to 3 m submersion ?? handles flooded excavation pits and river-crossing work. |
▲ -30 degC Cold Start
Arctic-grade synthetic oil and low-temperature FKM seals ensure clean cold-morning start. |
|
▲ Direct CTD3150 Replacement
Same flange, spline and brake port layout as the Brevini unit ?? zero adaptation required. |
Structure and Material Technology
The cross-roller slewing ring is manufactured from 42CrMo4 through-hardened steel, raceways ground to P5 accuracy class. Planet gears use 17CrNiMo6 carburised steel ground to DIN 5 accuracy. The output flange register face is precision-turned to 0.02 mm total runout for accurate sprocket mounting without shim adjustment. The housing exterior carries a two-coat epoxy primer + polyurethane topcoat paint system rated to 500 hours salt spray.
Typical Application Scenarios
| Industry | Machine / Use | Key Requirement |
|---|---|---|
| Earthmoving | 20 t excavator, slope grading | High lateral moment load during slope trimming ?? cross-roller bearing essential. |
| Road Building | Large tracked cold planer, 18 t class | High thrust force at slow milling speed; wide ratio range provides correct speed. |
| Crane | 24 t tracked crane undercarriage | Cross-roller bearing handles boom swing moment transmitted through undercarriage. |
| Mining | Medium dump crawler, open cast coal | High-cycle travel over rough terrain; IP68 seal handles water and coal dust. |
Selection Guide
- Lateral Moment Load (kNm) ?? Slope grading and dozing operations generate high moment; confirm cross-roller bearing is adequate.
- Required Ratio ?? 25:1 for fast large-machine tramming; 130:1 for maximum grading torque.
- Cold Start Temperature ?? Specify if operating below -20 degC for cold-grade oil and seal.
- Submersion Depth ?? Standard IP68 to 3 m; deeper service available on request.
- Motor Shaft ?? Provide motor model for direct spline/flange confirmation.
Contact EVER POWER application engineers for a bearing load analysis for your machine.
Brevini CTD3150 vs. EVER POWER EP-CTD3150
Important Notice: EVER POWER references the Brevini riduttori CTD3150 model number solely to assist customers in identifying a compatible replacement. We do not manufacture, sell, or claim any affiliation with Brevini riduttori. No trademarks or intellectual property of Brevini are reproduced. The EP-CTD3150 is an independently designed and manufactured product that is dimensionally and functionally compatible.
| Aspect | Brevini CTD3150 | EVER POWER EP-CTD3150 |
|---|---|---|
| Price | OEM premium (European) | Competitive ?? significant saving |
| Lead Time | 10-18 weeks | 3-5 weeks |
| Output Bearing | Tapered roller std | Cross-roller slewing ring std |
| IP Rating | IP67 standard | IP68 standard |
| Warranty | 12 months | 18 months |
Matched hydraulic travel motors for EP-CTD3150 are available from EVER POWER. Enquire about motor packages.
Quality Certifications and Service Commitment
- ISO 9001:2015 ?? Full batch traceability.
- CE Marking ?? Machinery Directive 2006/42/EC.
- 18-month warranty from dispatch.
- Cross-roller bearing inspection certificates provided on request.
See our quality policy at EVER POWER About Us.
Case Studies ?? Engineer Field Notes
| Country | Application | Customer Feedback |
|---|---|---|
| Sweden | 22 t excavator fleet, slope grading project, 6 units | “Lateral bearing loads from slope trimming destroyed our previous supplier’s output bearings every 2,000 hours. The cross-roller bearing in the EP-CTD3150 is still showing no measurable wear at 3,500 hours.” ?? Equipment Manager, Stockholm. |
| India | Large cold planer, highway resurfacing, NH-44 | “The 130:1 ratio gave us exactly the milling speed we needed without motor replacement. Installation took half a day per side.” ?? Project Engineer, Chennai. |
| New Zealand | 24 t crawler crane undercarriage, wind farm construction | “Operating on soft coastal terrain with frequent water crossings. IP68 seal handled conditions that would have failed a standard IP67 unit within months.” ?? Site Manager, Northland. |
Frequently Asked Questions
Q: Can the cross-roller bearing be replaced in the field?
A: Yes. The bearing is a discrete replaceable cartridge. A skilled mechanic can replace it in approximately 6 hours with standard tools. EVER POWER stocks the bearing cartridge separately.
Q: Is the IP68 rating certified to a specific depth?
A: Standard IP68 is tested to 3 m continuous submersion for 30 minutes. Deeper service (up to 5 m) is available as an option ?? specify at order.
Q: What sprocket mounting is compatible?
A: The output flange carries a standard bolt circle and register diameter matching the Brevini CTD3150. Custom bolt circles are available with 3-week lead time.
Partner With EVER POWER
Whether you need a single emergency replacement or a fleet-scale OEM supply programme, EVER POWER delivers. Browse our planetary drive replacement range or get in touch today. Learn more at planetary-gear-box.top.
