Full specification
| Parameter | Value |
|---|---|
| Frame / size | Φ70 × 75.4 mm |
| Ratios | 51:1 / 101:1 |
| Rated torque @2000 rpm input | 6.6 / 9.6 N·m |
| Average output torque | 8.6 / 13.5 N·m |
| Start–stop peak | 23 / 34 N·m |
| Instantaneous max | 43 / 66 N·m |
| Weight | 812 g |
| Encoder | Dual absolute encoder |
| Brake option | Documented from Φ52 up — confirm the variant |
| Force-control version | ±0.5% FS, 0.1% FS resolution, 8 kHz sampling |
Source: EYOU (Yiyou Robot) selection manual 2026.08, pp. 3–5. Figures verified November 2026 — confirm the exact variant against the datasheet issued with your order.
When this is the right choice
- 34 N·m start–stop vs 23 N·m at 51:1. The 101:1 build is 48% stronger on acceleration, which is what an elbow actually does all day.
- Force control at Φ70. Enough signal for insertion and wiping tasks without an external sensor — the smallest frame where that build is genuinely useful.
- 812 g including the brake option. That is the whole elbow actuator, not a motor plus a reducer plus an encoder bracket.
- Shares the Φ70 mount with PHA14H, so a prototype can swap to the instrumented version without redrawing the arm.
When it is the wrong choice
- 167 g heavier than PHA14H at the same rated torque. You are buying the encoder pair, the brake and the force-control path — not more newton-metres.
- 51:1 costs 33% of rated torque. 6.6 N·m is a big drop; only choose 51:1 if the output speed is the constraint.
- Not a shoulder. 13.5 N·m average will not hold a forearm plus a 2 kg payload through a lever — that is PHU17H-80 or above.
- The brake build is longer than the drawing. Check the axial envelope before committing.
Alternatives at a similar level
- EYOU PHA14H-101-C — Same 9.6 N·m at 645 g, no brake, single encoder
- EYOU PHU17H-80 — 30 N·m at 1,143 g — the shoulder frame
- Tongchuan TCHL-14 — Comparable envelope with brake and sensor variants
Quote this model
Model, quantity and destination is enough to start — we come back with price, availability and the datasheet.
PHU14H-70 FAQ
Is this the right frame for an elbow?
For a 3–8 kg arm, yes — 34 N·m start–stop accelerates a 1.5 kg forearm and a 700 g hand comfortably, and 66 N·m instantaneous covers a caught payload. Above 8 kg total arm mass, step up.
Do I order the force-control build?
Only if the elbow has to feel contact or be moved by hand. The dual encoder alone gives you position and velocity; contact detection through motor current is coarser and drifts with temperature.
How long does it take to ship?
Confirmed per order at quotation. Brake and force-control configuration drive the date more than quantity at this frame.
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