Products · Orbital Motors
BM4 Heavy-Duty LSHT Orbit Motor
Gradeability torque within a tight undercarriage envelope — the frame that fits where radial piston motors cannot, proven in 1–5 ton mini excavator travel drives.
BM4 sits in the middle of the BM3–BM6 heavy-duty family, sharing the direct-mount flange and reinforced construction that let the range deliver up to 3,000 N·m continuous without an intermediate gearbox.
Its signature application is mini excavator travel drive (1–5 ton class) — BM4 delivers the required gradeability torque within the tight undercarriage envelope where radial piston motors cannot physically fit.
Also applied in concrete pump drives and combine harvester systems alongside BM5 and BMR family motors.
Specifications · BM4 (BM3–BM6 family)
| Type | Heavy-duty LSHT orbit (cycloid) motor |
| Family displacement | 80 – 1,250 ml/r (BM3/4/5/6) |
| Family torque | 194 – 3,000 N·m |
| Speed range | 10 – 805 r/min |
| Max flow | 65 – 160 L/min |
| Configurations | Output shaft / Wheel type · Speed sensor option |
| Typical drives | Mini excavator travel · Concrete pump · Compact track drives |
Used in these application guides