{"id":2035,"date":"2026-04-17T09:32:20","date_gmt":"2026-04-17T09:32:20","guid":{"rendered":"https:\/\/planetary-gear-box.top\/product\/ever-power-ep-ctd3700-planetary-gearbox-replacement-of-brevini-riduttori-ctd3700\/"},"modified":"2026-04-17T09:32:20","modified_gmt":"2026-04-17T09:32:20","slug":"ever-power-ep-ctd3700-planetary-gearbox-replacement-of-brevini-riduttori-ctd3700","status":"publish","type":"product","link":"https:\/\/planetary-gear-box.top\/nl\/product\/ever-power-ep-ctd3700-planetary-gearbox-replacement-of-brevini-riduttori-ctd3700\/","title":{"rendered":"EVER POWER EP-CTD3700 Planetary Gearbox Replacement Of Brevini Riduttori CTD3700"},"content":{"rendered":"

EP-CTD3700 Flagship Planetary Track Drive Gearbox ?? 37,000 Nm<\/h1>\n

Brevini CTD3700 Compatible Replacement | EVER POWER<\/p>\n

The EP-CTD3700<\/strong> is EVER POWER’s most powerful planetary track drive gearbox ?? the flagship of the CTD replacement series. Engineered to replace the Brevini riduttori CTD3700, this unit delivers a class-leading 37,000 Nm<\/strong> output torque and a maximum ratio of 300:1<\/strong> from a single sealed housing, serving the largest hydraulic mining excavators, ultra-heavy crawler cranes and extreme-duty offshore tracked platforms where performance and reliability are non-negotiable.<\/p>\n

\"EP-CTD3700<\/p>\n

Product Overview<\/h2>\n

Target machines: 70-100 t+ hydraulic excavators, large-class crawler cranes (600 t+ lifting), TBM backup crawler track systems, heavy tracked launch and recovery systems for subsea equipment, and industrial tracked furnace car drives in steel mills<\/strong>. The EP-CTD3700 uses 18CrNiMo7-6 vacuum-arc-remelted steel<\/strong> throughout all gear stages ?? the same material specification used in aircraft landing gear gearboxes ?? delivering maximum core toughness for peak shock loads that would fracture lower-grade materials.<\/p>\n

Optional integrated dual oil temperature monitoring<\/strong> (input and output sump) combined with vibration monitoring<\/strong> provides a comprehensive health data stream for any predictive maintenance platform.<\/p>\n

Technical Parameters<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/thead>\n
Model<\/td>\nEP-CTD3700<\/td>\n<\/tr>\n
Replaces<\/td>\nBrevini riduttori CTD3700<\/td>\n<\/tr>\n
Max Output Torque<\/td>\n37,000 Nm<\/td>\n<\/tr>\n
Gear Stages<\/td>\n3 – 4<\/td>\n<\/tr>\n
Ratio Range<\/td>\n40:1 – 300:1<\/td>\n<\/tr>\n
Max Input Speed<\/td>\n2,000 rpm<\/td>\n<\/tr>\n
Continuous Thermal Limit<\/td>\n65 kW<\/td>\n<\/tr>\n
Overload Capacity<\/td>\n3.0x rated (momentary)<\/td>\n<\/tr>\n
Gear Steel Grade<\/td>\n18CrNiMo7-6 VAR<\/td>\n<\/tr>\n
Tooth Accuracy<\/td>\nDIN ISO 1328 Class 5<\/td>\n<\/tr>\n
Housing Material<\/td>\nGGG50 + C5M marine epoxy<\/td>\n<\/tr>\n
Lubrication<\/td>\nPAO VG 460 (factory filled)<\/td>\n<\/tr>\n
Protection Class<\/td>\nIP68<\/td>\n<\/tr>\n
Operating Temp.<\/td>\n-35 degC to +90 degC<\/td>\n<\/tr>\n
Approx. Weight<\/td>\n~158 kg<\/td>\n<\/tr>\n
Monitoring<\/td>\nDual oil temp (PT100) + vibration sensor boss<\/td>\n<\/tr>\n
Brake<\/td>\nSpring multi-disc failsafe \/ hydraulic release<\/td>\n<\/tr>\n
External Fasteners<\/td>\nStainless A4-80<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Working Principle<\/h2>\n

\"EVER<\/p>\n

The 4-stage coaxial arrangement achieves 300:1<\/strong> in a single housing by stacking four planetary stages. Stage 1 accepts the high-speed motor input at up to 2,000 rpm; each successive stage multiplies torque while reducing speed. The final output stage uses a large-bore taper roller bearing assembly<\/strong> factory-shimmed to zero axial play ?? essential for carrying the combined chain tension, sprocket offset and overturning loads of a 90 t excavator track system.<\/p>\n

The dual oil temperature monitoring<\/strong> uses a PT100 probe in both input-side and output-side oil sumps. Comparing temperatures between the two positions detects abnormal heat generation in individual gear stages before it manifests as visible damage ?? enabling predictive maintenance action with 3-4 weeks’ advance notice based on real operating data from multiple fleet installations.<\/p>\n

Core Advantages<\/h2>\n\n\n\n\n
\n
◆ Class-Leading 37,000 Nm<\/strong>
Top of the CTD series ?? no compromise for the largest tracked machines in operation.<\/div>\n<\/td>\n
\n
◆ 300:1 Single Housing<\/strong>
Eliminates tandem gearbox complexity for very high reduction applications.<\/div>\n<\/td>\n<\/tr>\n
\n
◆ VAR Steel Throughout<\/strong>
18CrNiMo7-6 vacuum-arc-remelted steel in all gear stages ?? aircraft landing gear specification.<\/div>\n<\/td>\n
\n
◆ Dual Temperature Monitoring<\/strong>
Input and output sump temperature comparison enables stage-specific fault detection.<\/div>\n<\/td>\n<\/tr>\n
\n
◆ C5M Marine Epoxy + A4-80 Fasteners<\/strong>
Full offshore corrosion protection ?? suitable for acid mine drainage and saltwater environments.<\/div>\n<\/td>\n<\/tr>\n<\/table>\n

Structure and Material Technology<\/h2>\n

All gear blanks in every stage are precision-forged from 18CrNiMo7-6 VAR steel<\/strong>, vacuum degassed to minimise inclusion content. Carburising depth is controlled to 1.0-1.5 mm; hardness profiles are documented per unit in the quality record. Tooth flanks are ground to DIN ISO 1328 accuracy class 5<\/strong>. The housing interior is shot-peened<\/strong> in all bore and seat zones to improve fatigue resistance. All exterior threaded fasteners are stainless steel A4-80<\/strong> ?? no galvanic corrosion risk in wet mine or offshore environments. The output flange registers are ground to 0.010 mm total runout for accurate sprocket mounting on large-class machines.<\/p>\n

Typical Application Scenarios<\/h2>\n\n\n\n\n\n\n\n
Industry<\/th>\nMachine \/ Use<\/th>\nKey Requirement<\/th>\n<\/thead>\n
Mining<\/td>\n90 t excavator, hard rock open cast<\/td>\nVAR steel handles peak shock loads from buried blasted rock; monitoring prevents unplanned stops.<\/td>\n<\/tr>\n
Crane<\/td>\n550 t crawler crane undercarriage<\/td>\n300:1 ratio provides precise ultra-slow travel during lift setup on soft ground.<\/td>\n<\/tr>\n
Tunnelling<\/td>\nTBM backup crawler system<\/td>\nContinuous 24\/7 slow push; dual temperature monitoring tracks stage health continuously.<\/td>\n<\/tr>\n
Steel Mill<\/td>\n200 t furnace car track drive<\/td>\nUltra-slow precise load movement; spring brake holds 200 t car on inclined transfer route.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Selection Guide<\/h2>\n
    \n
  1. Machine Class (t)<\/strong> ?? Provide operating weight and worst-case drawbar pull for torque confirmation.<\/li>\n
  2. Stage Count<\/strong> ?? 3-stage for 40:1-120:1; 4-stage for 120:1-300:1.<\/li>\n
  3. Monitoring Level<\/strong> ?? Basic (output sump only) or dual (input + output) temperature monitoring.<\/li>\n
  4. Environment<\/strong> ?? Specify acid mine drainage, saltwater or standard for appropriate coating and fastener grade.<\/li>\n
  5. Classification Society<\/strong> ?? For offshore, state DNV, BV or ABS requirement at order.<\/li>\n
  6. Motor<\/strong> ?? Provide hydraulic motor model, displacement and maximum pressure for complete system design.<\/li>\n<\/ol>\n

    Engage EVER POWER senior engineers<\/a> for a complete heavy-machine track drive system study.<\/p>\n

    Brevini CTD3700 vs. EVER POWER EP-CTD3700<\/h2>\n

    Important Notice:<\/strong> EVER POWER references the Brevini riduttori CTD3700 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-CTD3700 is an independently designed and manufactured product that is dimensionally and functionally compatible.<\/p>\n\n\n\n\n\n\n\n\n\n
    Aspect<\/th>\nBrevini CTD3700<\/th>\nEVER POWER EP-CTD3700<\/th>\n<\/thead>\n
    Price<\/td>\nHighest OEM European tier<\/td>\nSubstantially lower total cost<\/td>\n<\/tr>\n
    Lead Time<\/td>\n14-22 weeks<\/td>\n5-8 weeks<\/td>\n<\/tr>\n
    Gear Steel<\/td>\nStandard alloy steel<\/td>\n18CrNiMo7-6 VAR ?? aircraft grade<\/td>\n<\/tr>\n
    Max Ratio (single unit)<\/td>\nStandard range<\/td>\nUp to 300:1<\/td>\n<\/tr>\n
    Dual Temp Monitoring<\/td>\nNot available<\/td>\nStandard option<\/td>\n<\/tr>\n
    Class Society Inspection<\/td>\nAvailable at premium<\/td>\nDNV\/BV\/ABS at competitive rate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Complete heavy track drive packages ?? gearbox + high-torque hydraulic motor + installation hardware ?? available from EVER POWER. Request a turnkey drive package.<\/a><\/p>\n

    \"EVER
    \nQuality Certifications and Service Commitment<\/h2>\n