Description
Harmonic Drive FHA-17C-50-H-C1024 – Hollow Shaft Servo Actuator for High-Precision Positioning
The Harmonic Drive FHA-17C-50-H-C1024 is a compact hollow-shaft servo actuator that combines a zero-backlash Harmonic Drive gearset with a built‑in brushless servo motor and incremental feedback. From my experience, this size hits a sweet spot for small robot joints, pick‑and‑place axes, and precision indexing where you need high torque density without adding bulk. The 50:1 reduction is ideal when you want smooth motion, fast settling, and repeatable accuracy without fighting gear lash.
Our Order Process & Guarantees
- Warranty period: 365 days
- Delivery time: 1 week for in-stock; no more than one month at the latest
- Payment: 50% advance payment; full payment before delivery
- Express delivery methods: FedEx, UPS, DHL
Key Features
- Hollow shaft form factor – Route cables, air lines, or shafts through the center; simplifies routing on compact rotary axes.
- 50:1 reduction, zero-backlash gearing – Harmonic gearing delivers high torsional stiffness and repeatable positioning, typically with excellent smoothness at low speed.
- Integrated brushless servo motor – Fewer parts to source and align; shortens the build cycle for OEM machines.
- Incremental encoder C1024 – 1024 PPR channels (A/B/Z) for tight velocity/position control with mainstream servo drives.
- Direct load support – Cross‑roller bearing (on the FHA‑C family) supports external loads at the output, so you can mount plates, pulleys, or arms directly.
- Compact and lightweight – In many cases, the 17C size fits inside small housings or robot elbows where space is tight.
- Clean integration – You might notice that wiring is straightforward: motor phases + encoder leads; no fieldbus embedded at the actuator level.
- Common use cases – Collaborative robot joints, semiconductor wafer handling, medical device positioning, small rotary tables, and camera gimbals.
Technical Specifications
| Brand / Model | Harmonic Drive FHA-17C-50-H-C1024 |
| Gear Ratio | 50:1 |
| Encoder Type | Incremental, 1024 PPR (A/B/Z) |
| HS Code (typical) | 850151 – AC motors, multi‑phase, output ≤ 750 W (classification may vary by region and configuration) |
| Power Requirements | Driven by a compatible multi‑phase AC servo drive; encoder supply typically 5 VDC; drive mains commonly 200–240 VAC (to the drive). |
| Signal I/O Types | Motor phase leads; incremental encoder A/B/Z (TTL/line driver per option); shielded cabling recommended. |
| Communication Interfaces | None on the actuator (no fieldbus). Interface is via the servo drive’s encoder and power connections. |
| Dimensions & Weight | Compact “17C” frame; outer diameter typically around 90 mm; overall length commonly under 90 mm; weight approx. 1.2–1.8 kg depending on options. |
| Operating Temperature | 0 to +40 °C (non‑condensing, indoor industrial environment) |
| Installation Method | Flange mounting with central through‑hole; direct load support via integrated bearing. |
Related & Supporting Products
- Harmonic Drive FHA-17C-100-H-C1024 – Same size with 100:1 ratio for higher torque and finer positioning (lower output speed).
- Harmonic Drive FHA-14C-50-H-C1024 – More compact option when space is extremely tight, with reduced torque capacity.
- Harmonic Drive FHA-25C-50-H-C1024 – Larger frame for significantly higher output torque on heavier loads.
- Alternative encoders: FHA‑17C variants with higher‑resolution incremental or absolute encoders (e.g., multi‑turn absolute) are available when the control requires it.
- Supporting components: Compatible multi‑phase AC servo drives that accept incremental encoder feedback; shielded motor/encoder cables; zero‑backlash output couplings or direct‑mounting plates.
Installation & Maintenance
- Mounting – Use a rigid, flat machined surface. Align the hollow shaft carefully to avoid misalignment on through‑shaft or cable routing. Torque mounting bolts per manufacturer guidelines.
- Cabinet & wiring – Place the servo drive in a ventilated control cabinet (IEC/UL recognized). Use shielded motor and encoder cables; ground both ends as recommended to reduce noise.
- Thermal & environment – Operate in 0–40 °C, non‑condensing. Provide airflow around the actuator body; avoid dust ingress where possible.
- Safety – Lock out power during installation. Verify brakes (if fitted) and ensure loads are supported before removing hardware.
- Routine checks – Inspect connectors and cable strain relief every 3–6 months. Confirm zero‑position in the control after any mechanical changes. Firmware updates apply to the servo drive, not the actuator itself.
- Lubrication – FHA‑C gear units are factory‑lubricated; in most cases they are maintenance‑free over their service life under rated conditions.
Quality & Certifications
- CE and RoHS compliance for the FHA‑C family, typically documented per shipment.
- Manufacturing under ISO 9001 quality systems.
- Manufacturer warranty standard; our store coverage is 365 days from delivery.
One thing I appreciate is how predictable these actuators are when paired with a well‑tuned servo drive. We often see customers drop cycle time simply by switching to the 50:1 variant and gaining stiffness at the output. A robotics OEM told us the hollow shaft saved them hours on each build by letting them pass slip‑ring lines straight through the center—less clutter, fewer failure points.
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