Core Technical Specifications (Custom Range)
- Voltage Range: 12V to 96V (fully custom winding and insulation)
- Power Range: 200W to 5,000W
- Gear Ratios: 1:6 to 1:24 (custom calculated for your motor and speed target)
- Gear Materials: 20CrMnTi standard, 20CrNiMo for extreme loads, or your specified alloy
- Output Shaft: Custom diameter, length, splines, or keyway per your drawing
- Mounting Interface: Bolt pattern, flange thickness, and center bore matched to your frame
- Housing: Die-cast aluminum, extruded aluminum, or steel fabricated per duty and cost target
- Protection Level: IP54 to IP68 depending on application environment
- Controller Integration: We supply matched programmable controllers with your custom speed-torque curve
- Lubrication: Grease-packed standard, oil-bath available for high-speed or continuous-duty designs
- Working Temperature: Custom seal and grease selection for -40C to +60C if needed
- Warranty: 12 months standard, 24 months available for validated designs
Why Choose Us
Factory Strengths
- ISO9001:2015 certified since 2016 with full MES + ERP digital management
- National High-Tech Enterprise recognized by the Chinese government
- 13 years focused exclusively on electric vehicle drivetrain components
- Over 1,000 direct customers across 30+ countries
- In-house CNC machining center for rapid prototype housing and shaft production
- 3D scanning and reverse-engineering capability for competitor sample analysis
- Gear design software (KISSsoft licensed) for custom ratio and tooth profile optimization
- Prototype-to-production lead time: 2 weeks for first article, 3-4 weeks for production ramp
Customization Services
- Complete drivetrain design: We do not just sell a differential. We calculate motor-differential-wheel matching for your exact vehicle weight, tire size, grade requirement, and top speed.
- Private labeling: Logo laser-etched on housing, custom color, branded packaging, English/Spanish/Arabic manuals
- Regulatory support: We provide technical documentation for EEC, DOT, or local homologation requirements
- Exclusive supply agreements: Lock in design ownership and geographic exclusivity for annual commitments over 1,000 units
- Quality agreement customization: AQL levels, inspection reports, and SGS third-party inspection arranged per your procurement policy
- Engineering liaison: Direct access to our gear design engineer via WeChat/Teams for real-time questions during development
- Low MOQ: 100 units per model for custom designs (not 1,000 like most factories)
Real Customer Case Study: Canadian Electric Vehicle Startup
Customer: Toronto-based startup developing a heavy-duty electric cargo trike for last-mile delivery in Canadian winters
Before Finding Kehuan:
- Supplier 1 (domestic Canadian): Quoted $280/unit at 500-piece MOQ, 16-week lead time, no custom ratio
- Supplier 2 (European): Quoted 190 euros/unit at 1,000-piece MOQ, 12-week lead time, refused to share gear design files
- Supplier 3 (Chinese generalist): Promised custom design, sent a standard unit with a different paint color
- Startup challenge: Needed a custom 1:14.5 ratio for 72V 2,500W motor with -30C cold-start requirement
- Timeline pressure: Pilot fleet of 50 units required within 10 weeks for investor demo day
- Budget constraint: Target landed cost under $140 USD/unit
Working with Kehuan:
- Week 1: Startup sent CAD files, motor specs, and performance targets. Our engineer proposed 3 gear ratio options with simulated acceleration and top speed data.
- Week 2: Startup selected option B. We CNC-machined prototype housing and cut custom spiral-bevel gear set.
- Week 3: First article shipped to Toronto via air freight. Startup tested in -25C chamber. Passed.
- Week 4: Minor seal specification adjustment for extreme cold. Second article approved.
- Week 6: Production of 50 pilot units completed.
- Week 8: Units landed in Toronto, 2 weeks before investor demo day.
- Pilot results: 50 units operated for 8 months in Toronto winter with zero cold-start failures
- Follow-on order: 400 units at $132/unit landed (FOB + shipping + duties)
- CTO quote: "Kehuan was the only factory that treated 50 units like a real project. They sent gear simulation data, flew a prototype in 3 weeks, and hit a price point that let us compete with gas trikes. That is why we signed a 2-year exclusive supply agreement."
Key data point: The electric vehicle differential box custom design MOQ 100pcs capability that won this customer is standard practice at Kehuan, not a special exception.
Frequently Asked Questions
Q: What do you need from me to start a custom differential project?
A: Send us your motor specification (voltage, power, rated RPM, peak torque), your target vehicle speed, tire rolling diameter, and any mounting constraints. If you have a physical sample of an existing differential, ship it to us for 3D scanning. Within 72 hours we return a technical proposal with gear ratio options, predicted performance, and unit pricing.
Q: Who owns the intellectual property for a custom gear design?
A: You do. For the OEM ODM electric trike differential gearbox factory China engagement, we sign a design ownership agreement before starting work. Your custom gear profiles, housing dimensions, and controller mapping files remain your exclusive property. We will not resell your design to other customers.
Q: How do you handle quality control for custom designs that have no historical production data?
A: First article inspection is 100% dimensional and functional. We run the first unit at 150% rated load for 1 hour and provide a complete test report with vibration spectrum and temperature data. For production lots, we inspect to AQL 1.0 unless you specify a different level. Third-party inspection by SGS, BV, or Intertek is available at your cost.
Your Custom Differential Project Starts With an Email
Stop accepting catalog parts that almost fit. We engineer differentials that exactly match your vehicle.
