FHB21 Slewing Drive
Heavy-load drives with bronze worm gear. Heavy-load slewing drives with bronze worm-wheel teeth for higher drive torque and scuffing resistance, and two shaft seals (outer and inner ring). Built to withstand large axial dynamic loads; available with two worms and two motors for double the torque.
Performance
| Model | FHB21 |
|---|---|
| Series | FHB Series |
| Type | Heavy-load drives with bronze worm gear |
| Max. output torque | 28,700 N·m (21,169 lbf-ft) |
| Max. tilting moment | 203,000 N·m (149,733 lbf-ft) |
| Holding torque | 107,000 N·m (78,923 lbf-ft) |
| Max. axial load | 1,600 kN (359,680 lbf) |
| Max. radial load | 650 kN (146,120 lbf) |
| Gear ratio | 90:1 |
| Tracking precision | ≤ 0.15° |
| Backlash | 0.1° |
| Unit weight | 372.6 lb (169 kg) |
Maximum ratings. Our engineers will confirm the drive for your duty cycle.
Load chart
Tilting moment vs. axial load. Click to enlarge.
Get this drive
Standard lead time 14–16 weeks; expediting available for an additional charge. Pricing quoted within 1–2 business days. 3D models available on request.
Request a Quote1 FHB21 configuration on file
Drives we have already engineered: with hydraulic motors, DC gear motors, SEW-EURODRIVE or NORD AC gear motors integrated in-house, planetary gearboxes, encoders and brakes, or built to mate with the customer’s own gearbox or motor. Click a configuration to see what it includes. Need something different? New designs are added often.
FHB21-90M-BH-2R-BM3Y-315-DHydraulic motor
| Hydraulic motor | 315 cc/rev displacement |
|---|---|
| Motor ports | toward bottom mounting face |
| Hydraulic pressure | 14 MPa (2,031 psi) |
| Hydraulic flow | 30 L/min (7.9 gpm) |
| Output speed | 0.94 rpm |
| Input | 6B spline bore (21.8 mm) |
| Worm far end | Hex head (manual drive) |
| Worm shafts | 2 (double torque) |
| Worm hand | Right hand |
| Ratio | 90:1 |
| Mounting threads | Metric |
| Mounting holes | Blind threaded holes on inner and outer rings |
| 3D model | Available on request |
Talk to an engineer
Need help selecting the right part? Our engineers will size it, cross it, and quote it — usually within 1–2 business days.
Not in the catalog? We design to your application, with no engineering charge.