6GU 120–250W
Top of the K-series envelope. Heavy gearhead, Ø14 mm shaft. Ratios 1:3–1:180.
Standard gear motors (120 W–400 W)
The band between compact K-series and high-power GH/GV — 120–250W 6GU frames and GH/GV 0.1–0.4 kW (100–400 W).
120W–400W6GU · GH/GV 0.1 / 0.2 / 0.4 kWRatios 3:1–1800:1GH foot / GV vertical1φ 110/220V · 3φ 220/380V
What sits in this class
GH/GV 0.1 kW
100W GH foot / GV vertical. Aluminium frames 18 / 22 / 28.
GH/GV 0.2 / 0.4 kW
200W and 400W main drives. Same mounting kit as the rest of the GH/GV family.
Output torque (N·m) — 0.1 / 0.2 / 0.4 kW
Rows are ratio. Empty cells are not offered. Two-stage ratios 200:1–1800:1 are quoted from the full table. 750 W and above: see high-power gear motors.
Sizing check: T (N·m) = 9550 × P (kW) / n × ratio × 0.90.
| i | rpm | 0.1 kW | 0.2 kW | 0.4 kW |
|---|---|---|---|---|
| 3 | 473 | 1.9 | 3.7 | 7 |
| 5 | 284 | 3.1 | 6.2 | 12 |
| 10 | 142 | 6.2 | 12.4 | 24 |
| 15 | 95 | 9.1 | 18 | 36 |
| 20 | 71 | 12 | 24 | 48 |
| 25 | 57 | 14 | 30 | 60 |
| 30 | 47 | 18 | 36 | 72 |
| 40 | 36 | 22 | 46 | 93 |
| 50 | 28 | 28 | 57 | 116 |
| 60 | 24 | 34 | 69 | 139 |
| 70 | 20 | 43 | 80 | 162 |
| 80 | 18 | 48 | 92 | 184 |
| 90 | 16 | 52 | 103 | 207 |
| 100 | 14 | 58 | 115 | 230 |
| 120 | 12 | 69 | 138 | 277 |
| 150 | 9 | 91 | 183 | 363 |
| 180 | 8 | 103 | 207 | 408 |
| 200 | 7 | 116 | 229 | 432 |
Code, frames and electrics
Example GH28-200-30-S-B = GH foot / frame 28 / 200 power code / ratio 30 / S 3φ 220·380V / B brake. The 200 power code is 0.2 kW — inside this standard band.
Frames 18 / 22 / 28 are ADC12 aluminium. IP55, Class F (155°C), S1 continuous duty, 50/60 Hz. Standard 4-pole 1420 rpm.
On an inverter, keep normal gear-motor frequency below 60 Hz. A brake on a VFD needs its own 220V single-phase supply.
Need 750 W or above?
High-power gear motors start at 0.75 kW. Compact 6W–90W is a separate page.