Description
- TMotor UAV Brushless Motor U8II KV85
- Offers centrifugal air-cooling system
- Built-in array for efficient heat dissipation
- Open structure for better cooling performance
- Capability of passing 48h salt spray test
- Ingress Protection Level: IP55
The TMotor UAV Brushless Motor U8II KV85 offers a centrifugal air-cooling system and a built-in array for efficient heat dissipation. The terrific cooling performance guarantees reliability during running. It can operate in a 50 °C environment disdainfully.
U8LITE and U8M are with the same magnetic circuit design, Imported German 7075 aviation aluminum alloy assists in motor toughness while the motor cap is simplified with 15%+ weight reduction. An open structure offers a better cooling performance.
Imported Custom Silver Wires: Fast current flow on silver wires surface improves motor response speed for easy control over aircraft. Silver winding greatly reduces copper loss and helps lower motor heat by 30%.
Magnetic Circuit Optimization: The curved magnets in the new U8 have less magnet space. Optimized design help save energy during flight.
Heavy Load: with the fall of motor temperature, the max thrust of the new U8 reaches 7.3 kg from 5 kg doubling the aircraft payload.
Imported Custom Bearings Dual Bearing Protection: Simulated analyses are carried out based on the stress under the operating condition in axial and radial directions. Redesign of custom bearing contributes to prolonging the bearing life to 1000h+ under normal operation. Property of anti-rust and anti-corrosion from dual bearing protection gets the motor through 6h salt spray test.
Safety: The silver wire lead avoids soldering. Say no to faulty and cold soldering. Imported German 7075 aviation aluminum alloy reinforces the motor structure by 20%.
Sliver leads the trend with intelligence: FOC ESC: Smooth control, Low noise, High efficiency. The latest ultra-light 28-inch carbon fiber prop weighs only 55g (the weight of a standard 28-inch CF prop is 98g). An increase of 12% in-flight time and weight loss of 320g (quadcopter) is attainable once U8LITE and the ultra-light prop are on your aircraft.
- 1x TMotor UAV Brushless Motor U8II KV85
- KV: 85
- Idle Current ( 18 V): 0.5 A
- Internal Resistance: 225 ± 5 mΩ
- Peak Current (180s): 19.1 A
- Max. Power (180s): 916.8 W
- Rated Voltage (Lipo): 12 S
- Propeller Recommendation: 28 - 29 inch
- Quadcopter (28 CF): 10 kg
- Hexacopter (28 CF): 15 kg
- Octocopter (28 CF): 20 kg
- Service life: 1500 flights (40 mins / flight)
- Ingress Protection Level: IP55
- Motor Weight (Incl. Cable): 277 g
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at RoboItchi's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RoboItchi's troubleshooting process or of a verified shipping error by RoboItchi.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A ¥10,000 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RoboItchi's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
- Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items — Standard catalogue products not stocked by RoboItchi and ordered specifically to fulfill a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
To request a return, submit a support ticket from your account under My Support Tickets to obtain a Return Authorization (RA) number. Returns without an RA number will be refused.




