BML Forestry Grapple Rotator Hydraulic Motor

BML hydraulic motor for forestry grapple rotation

Olive Branch Hydraulics manufactures hydraulic orbital motors for equipment builders and replacement enquiries. The BML catalogue section covers a shaft distribution motor for wood grapple and log handling rotation, with five installation forms and an illustrated valve block.

Select the mounting form, gear interface and hydraulic circuit together. The photograph illustrates the square-flange grapple motor arrangement and does not represent every displacement or installation form.

Drive gear, valve block and connection options

The output gear table specifies 14 teeth, module 5, 20° pressure angle and a 70 mm pitch diameter, with nominal 78 mm outside diameter. A separate six-tooth shaft section is also drawn; it is a different interface and must not be confused with the 14-tooth output gear.

The catalogue describes an internal spline drive arrangement, internal sealing and a valve block that may be configured to the equipment circuit. Confirm the complete gear profile, mating component, tolerances, axial engagement and valve functions against an approved drawing.

Ports A and B control rotation, with a separate T drain shown in the schematic. Facing the output shaft, A inlet/B outlet gives clockwise rotation; B inlet/A outlet gives anticlockwise rotation.

Catalogue performance data and model identification

Printed pages P80–82 show a 630 cc/rev performance row under BML headings, but the row itself is marked BMH. The figures below are transcribed reference data pending configuration confirmation; they do not establish BML/BMH interchangeability.

Maximum flow, operating temperature, allowable case pressure, radial/axial loads and peak duty duration are not tabulated in these five pages. Obtain verified limits for the ordered assembly and do not combine maximum speed, pressure and torque into one operating point.

Five installation forms: dimensions and ports

Forms 4 and 5 share the following dimensional size table. These six nominal sizes have no separate performance ratings in this section; 625 must not be relabelled 630, and 395 must not be changed to 400.

L and L1 refer to the labelled drawing references. Check the complete mounting geometry, shaft projection, pilot fit and hose clearance for the chosen form; a similar flange outline does not prove a replacement match.

Equipment matching and RFQ checklist

1. Identify the connection form and complete original motor code.
2. Provide mating gear data, mounting dimensions and available installation space.
3. Specify flow, pressure, required starting/running torque, speed and duty cycle.
4. Describe return pressure, case drain, fluid condition, temperature and external loads.
5. Confirm valve functions, braking and load control separately with the equipment designer.
6. State quantity, destination, documentation and packaging requirements for quotation.

No specific machine model, OEM part number or third-party equivalence has been verified for this BML section. A pressure valve or internal sealing feature must not be described as a certified load-holding brake or a guarantee against movement.

BML model searches and multilingual identification

Identification variants include BML 630, BML630 and BML-630 grapple motor, plus BML 245 / BML245 / BML-245, BML 310 / BML310 / BML-310, BML 395 / BML395 / BML-395, BML 490 / BML490 / BML-490, BML 625 / BML625 / BML-625 and BML 800 / BML800 / BML-800. These are search spellings and catalogue size references, not complete order codes.

Related enquiry terms include forestry grapple rotator hydraulic motor, wood grab rotation motor and log grapple orbital motor. Other suppliers use BML for unrelated miniature motors; send the complete drawing rather than relying on the three-letter name.

Español: motor hidráulico para rotador de pinza forestal BML. Français : moteur hydraulique de rotation pour grappin forestier BML. Русский: гидромотор поворота лесного захвата BML. Keep the original part marking with every translated enquiry.

Frequently asked questions

What equipment is the BML section intended for?

Wood grapple and log handling rotation. Exact machine compatibility requires the mounting, gear, circuit and operating duty to be checked.

Why is BMH shown in the 630 performance table?

The source has BML page headings and a BMH row label. The 630 figures remain reference data until the selected configuration is confirmed; no automatic BMH substitution is claimed.

Can the 630 ratings be used for BML625 or BML800?

No. The six sizes on forms 4–5 are dimension references without a rated performance table here, and 625 and 630 remain separate identifiers.

Is 220 bar a continuous pressure rating?

No. The reference row marks 22 MPa as peak pressure; its sustained working pressure entry is 15 MPa. Verify both limits and allowable duration for the ordered assembly.

Are all five mounting forms interchangeable?

No. Flange shape, hole pattern, orientation, lengths and port connections differ. Use the full drawing for the chosen form.

Does the 14-tooth gear identify the complete shaft?

No. The 14-tooth module-5 output gear table and separate six-tooth section describe different features. Confirm the full mating geometry, tolerances and engagement.

Does the valve block replace a load-holding brake?

No brake rating is provided in these pages. Confirm braking, overrun and load control functions separately for the machine.

What is needed for an EXW quotation?

Send the original code, connection form, drawings, duty, quantity and destination. Sample terms, MOQ, delivery schedule, test documents and packaging are confirmed in the quotation.

Related hydraulic motor families

See the separately documented B2K disc valve motor and B6K disc valve motor for other drive enquiries. Their interfaces and ratings must not be transferred to the BML grapple motor.

Request a configuration review from Olive Branch Hydraulics with the checklist above for an EXW Hebei quotation.