GH foot
Standard horizontal mainstay.
High-power gear motors (750 W and above)
GH foot and GV vertical main drives — 0.75 / 1.5 / 2.2 / 3.7 kW. Torque to 1270 N·m. IP55, Class F.
0.75 / 1.5 / 2.2 / 3.7 kWRatios 3:1–1800:1To 1270 N·mGH foot / GV vertical1φ 110/220V · 3φ 220/380V
Mounting variants
GV vertical
Vertical axes, lifts, turntables.
GHM / GVM flange
Flange head, no foot. Do not hammer the lock when mounting.
GHD / GVD double shaft
Output both ends, one motor two loads.
Two-stage horizontal
High ratios, up to 1800:1.
Two-stage vertical
The same ratios in a GV envelope.
Output torque (N·m) — 0.75 kW and above
Rows are ratio. Columns are motor power. Empty cells are not offered. Two-stage ratios 200:1–1800:1 are quoted from the full table.
Sizing check: T (N·m) = 9550 × P (kW) / n × ratio × 0.90. Example: 1.5 kW 4-pole at 60:1 → 544.75 N·m.
| i | rpm | 0.75 kW | 1.5 kW | 2.2 kW | 3.7 kW |
|---|---|---|---|---|---|
| 3 | 473 | 13 | 26 | 38 | 60 |
| 5 | 284 | 22 | 45 | 67.2 | 110 |
| 10 | 142 | 45 | 91 | 137 | 220 |
| 15 | 95 | 68 | 135 | 201 | 326 |
| 20 | 71 | 90 | 181 | 268 | 436 |
| 25 | 57 | 112 | 226 | 336 | 539 |
| 30 | 47 | 135 | 271 | 403 | 647 |
| 40 | 36 | 175 | 349 | 520 | 863 |
| 50 | 28 | 219 | 524 | 651 | 1070 |
| 60 | 24 | 262 | 624 | 781 | 1270 |
| 70 | 20 | 315 | 708 | 925 | — |
| 80 | 18 | 355 | 771 | 1050 | — |
| 90 | 16 | 393 | 837 | 1130 | — |
| 100 | 14 | 432 | 1010 | 1260 | — |
| 120 | 12 | 518 | 1320 | — | — |
| 150 | 9 | 680 | 1480 | — | — |
| 180 | 8 | 768 | — | — | — |
| 200 | 7 | 828 | — | — | — |
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. High-power codes use 0.75 / 1.5 / 2.2 / 3.7 kW.
Frames 32 / 40 / 50 are ductile iron (grey as standard). Output shaft diameters through 50 (max 55) mm. Shafts can be lengthened or shortened.
IP55, Class F (155°C), S1 continuous duty, 50/60 Hz. Motor types: standard, brake, inverter-duty, inverter + brake. Power-off brake 220V AC; holding brake 24V DC.
Five reasons for high-power GH/GV
Heavy gears
20CrMoTi, dual heat treatment + dual hobbing, root case ≥1 mm, HRC60, teeth ~20% thicker.
Sealing
NAK triple-lip (main + auxiliary + dust). About 33% more seal path than a dual-lip ring.
Torque
3.7 kW at 60:1 delivers 1270 N·m. The table above is the selection file, not a brochure claim.
Inverter-ready
3–120 Hz motors with a forced cooling fan.
Specials
Shaft length, 24–660V, 600°C / −60°C, 3000–5000 m.
Seven order fields
Mount (GH/GV) · frame · kW · ratio · voltage · brake · inverter motor.
Shock loads and frequent reversing: step up a frame so the gear set is three-stage. Two-stage 200:1–1800:1 torque, inverter fan maps and 2-pole (2880 rpm) range are confirmed on the quotation.
Download the torque table or start selection
Catalog pages cover GH/GV frames. Engineering issues the two-stage sheet with the quote.