# SINOTUP TF55 Micro Cycloidal Reducer

![SINOTUP TF55 Micro Cycloidal Reducer](https://trymaglev.com/parts/img/ac-sinotup-tf55.webp)

Chinese TwinSpin-style micro cycloidal reducer for humanoid and arm joints; 82 N·m rated, 0.8 kg.

- Maglev ID: ac-sinotup-tf55
- Brand: SINOTUP
- MPN: TF55
- Category: actuators / Cycloidal & RV Reducers
- Origin: CN (maker HQ, factory not confirmed)
- Maker: SINOTUP (拓朴智行) (brand, CN)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8483.40.50
- MOQ: 1 · Lead time: unknown
- Confidence: REPORTED

## Price
- 1+: $630 (distributor, 2026-11-03, https://aifitlab.com/products/sinotup-tf55-reducer; USD 630.00, Shopify variants 11/31/51/91 all listed at 630.00; mass 0.8 kg on same page)

## Specifications
- Ratio: Axis rotation 21-81 (store: 11/31/51/91)
- Rated output torque: 82 N·m
- Max. accel./decel. torque: 162 N·m (emergency stop 240 N·m)
- Backlash class: P0-P2 (values not stated)
- Outer diameter (housing flange): Ø70 mm
- Hollow shaft: unknown
- Mass: 0.8 kg
- Overall axial length: 34.5 mm
- Input bore (keyed H7 bore for motor shaft): Ø8 H7

## Links
- Product: https://aifitlab.com/products/sinotup-tf55-reducer
- Datasheet: none
- CAD: none

## Equivalents
- Spinea TwinSpin TS 70 Cycloidal Reduction Bearing (T series) (ac-spinea-ts70-75-tb)

## Sources
- https://aifitlab.com/products/sinotup-tf55-reducer (reseller spec table, price, stock, drawing/STEP listed; price USD 630.00 (seen 2026-11-03))
- https://cdn.shopify.com/s/files/1/0673/6848/5000/files/SINOTUP-TF55-Drawing.pdf?v=1780388337 (Outer diameter (housing flange) (researched 2026-11-03); Overall axial length (researched 2026-11-03); Input bore (keyed H7 bore for motor shaft) (researched 2026-11-03))