Orbital motor series · Size-specific catalogue review
BM1 / BYM shaft-distribution motors
Nine published orbital-motor sizes. Review one size’s reported rated and maximum values, then confirm its full shaft, flange, port and drain configuration.
Keep each size’s data in its own row
Select a size to reduce the table to one reviewed entry.
The official model page describes BM1 and BYM shaft-distribution motors with a 6/7-tooth inserted-roller rotor/stator arrangement. Its nine columns are transcribed below as rows. [1] Values remain supplier reports; no platform bench test is claimed.
All nine reviewed rows shown.
Paired cells read rated / maximum. The source uses “额定 / 最大”; these are not automatically re-labelled continuous/intermittent. A pair is not permission to combine maxima.
| Size | Displacement cm³/rev | Speed rpm | Torque N·m | Differential pressure MPa | Flow L/min | Mass kg |
|---|---|---|---|---|---|---|
| 50 | 51.3 | 675 / 775 | 100 / 100 | 14 / 14 | 35 / 40 | 6.7 |
| 80 | 80.6 | 650 / 750 | 160 / 190 | 14 / 17.5 | 55 / 60 | 6.9 |
| 100 | 100.8 | 520 / 600 | 200 / 240 | 14 / 17.5 | 55 / 60 | 6.9 |
| 125 | 124.9 | 420 / 475 | 250 / 292 | 14 / 17.5 | 55 / 60 | 7.2 |
| 160 | 157.2 | 330 / 375 | 320 / 363 | 14 / 16.5 | 55 / 60 | 7.5 |
| 200 | 199.2 | 265 / 300 | 330 / 358 | 12 / 13 | 55 / 60 | 8 |
| 250 | 252 | 200 / 240 | 352 / 352 | 11 / 11 | 55 / 60 | 8.5 |
| 315 | 314.5 | 165 / 190 | 360 / 360 | 8.5 / 8.5 | 55 / 60 | 9 |
| 375 | 370 | 135 / 160 | 420 / 420 | 8.5 / 5.5* | 55 / 60 | 9.3 |
* Size 375 has a source contradiction
The website prints rated differential pressure 8.5 MPa and maximum 5.5 MPa. We keep that transcription visible, but do not use it to approve operation or silently “correct” it. Obtain a corrected controlled sheet from the supplier. No series-wide numerical pressure rating is inserted into JSON-LD.
Maximum figures are not one operating point
The source explains rated speed/torque at rated flow/pressure and explicitly says the motor must not run at maximum speed and maximum pressure simultaneously. [1] Request the selected size’s speed/torque and efficiency curves and the allowed duty modes.
- Working-oil temperature
- Source states maximum 80°C
- Drain-dependent wording
- Outlet-pressure table is labelled “with drain connected”
A separate source table lists inlet and outlet pressures of 14 MPa rated / 17.5 MPa maximum for the family, with the outlet heading explicitly dependent on a connected drain. These are not the same quantity as the size-specific differential-pressure limits. Obtain the actual case/drain/return conditions before reviewing a series or parallel installation.
The website gives general running-in advice. It is not reproduced here as a universal commissioning procedure: request current instructions for the delivered code and assign competent installation responsibility.
The size number does not specify the installation
Mechanical definition
Return a full-code drawing for shaft, flange/pilot, mounting and envelope. Identify driven coupling and radial/axial loads with their limits. The family photograph cannot resolve a shaft option.
Hydraulic definition
Identify ports/rotation, drain/return routing, seals, fluid and cleanliness requirements. Match the block/circuit revision and any brake or load-holding components supplied.
Horey’s wider catalogue uses other-brand comparison headings. [2] No authorized relationship or direct replacement is authenticated. For replacement, submit the old full identification and installation documents; for a new drive, submit torque/speed/duty and load conditions.
Agree a measurable acceptance point
Specify the selected size/full code, speed/torque point, pressure/flow, fluid/temperature, measurement method and sampling. Request a report tied to the delivered identity, rather than interpreting catalogue maxima as measured order-lot performance.
ISO 4409’s publisher abstract covers steady-state performance/efficiency testing and presentation of results for rotating positive-displacement components. [3] It helps define the test discussion; it does not establish Horey conformity, endurance or complete-drive safety. Keep the assembled machine’s starting/braking, thermal and load checks separate.
Can size 315 deliver 360 N·m at its maximum speed?
The table does not establish that combined operating point. It distinguishes rated and maximum labels and prohibits simultaneous maximum speed/pressure. Obtain the exact performance envelope.
Does a BM1/BYM label mean identical shafts and mounting?
No complete order-specific interfaces are established by the family label. Confirm the offered drawing and full code.
Send one size and one installation definition
Sources & review
- Horey BM1/BYM detailed table ↗
Directly read nine size columns, rated/maximum values and operating footnotes. 375 maximum differential-pressure anomaly retained, not corrected without supplier evidence.
2026-10-11 - Horey company and catalogue context ↗
Motor, block, steering and drive-system offer. Other-brand headings do not authenticate interchangeability.
2026-10-11 - ISO 4409:2019 publisher scope ↗
Steady-state component performance/efficiency methods and test presentation; not a delivered Horey test or conformity claim.
2026-10-11
Specifications come from the manufacturer’s published information and the sources above; buying advice is written by CivilEquip with AI assistance. Ask the manufacturer to confirm the data for your configuration. Editorial policy · Report a correction.