CubeMars RI80 V2.0 KV75 Frameless Inrunner Torque Motor
Low-cost 85 mm frameless inrunner kit with 40.5 mm bore for cobot arms and exoskeleton joints; Hall and no-Hall versions.
Specifications
| Peak torque | 4.1 Nm |
|---|---|
| Continuous torque | 1.45 Nm rated |
| Outer diameter | 85 mm |
| Axial length | 27 mm overall |
| Voltage | 24/36/48 V |
| Mass | 411 g |
| Through bore | 40.5 mm |
| KV | 75 rpm/V |
| Rated current | 9.4 A |
| Torque constant | 0.155 Nm/A |
| Rated speed | 2430 rpm @ 48 V (1135/1785/2430 @ 24/36/48 V) |
| No-load speed | 2960 rpm @ 48 V (1480/2220/2960 @ 24/36/48 V) |
Who makes it
CubeMars and T-MOTOR are one manufacturer group (Sanrui Intelligent, Nanchang, Jiangxi), already in Maglev's actuator benchmark pool as CN002; contact on file is info@cubemars.com. Ask about custom windings and which country each part is made in.
Landed cost in the US
Total US duty on this part by where it is made (2026-10-29). Mexico shown before USMCA preference; qualifying goods enter duty free. Your factory choice, not the shipping port, sets the origin.
Loading duty data…
Compliance
| HTS classification | 8501.31.40.00 typical, not a ruling |
|---|---|
| NDAA | unknown |
| Blue UAS | unknown |
| FCC | n/a |
Equivalents from other makers
Works with
Sources
- https://www.cubemars.com/product/ri80-v2-0-kv75-frameless-inrunner-torque-motor.htmlspecs, STEP/2D drawing downloads; note page lists peak current as 27.6 A in one table and 9.4 A in another; Torque constant (researched 2026-11-03); Rated speed (researched 2026-11-03); No-load speed (researched 2026-11-03)
- https://store.cubemars.com/products/ri80price $132.90, sold out
Record confidence: VERIFIED. VERIFIED means the maker's own documents; REPORTED means a credible third party; UNVERIFIED means a single weak source. Anything we could not confirm says unknown.