The GFB305 is a planetary gearbox designed for compatible hydraulic swing drive and rotational power transmission applications. It reduces input speed and transmits torque to the driven mechanism according to the selected reduction ratio. Configuration selection depends on the required output torque, operating speed, hydraulic motor interface, braking requirements and mounting dimensions.
The supplied product data lists a rated output torque of 5,000 Nm, a maximum output torque of 7,500 Nm and multiple single-stage, two-stage and three-stage reduction ratios. These parameters can be used as a starting point for equipment selection or replacement evaluation.
For replacement projects, confirm the original gearbox model, mounting dimensions, output connection, motor interface and operating limits before ordering. Similar model names or nominal torque ratings do not establish direct interchangeability.
Model: GFB305.
Rated output torque: 5,000 Nm.
Maximum output torque: 7,500 Nm.
Single-stage reduction ratios: 4.3 and 6.2.
Two-stage reduction ratios: 15.3, 18.1, 24.5 and 38.4.
Three-stage reduction ratios: 63.1, 77.2, 105 and 178.
Listed hydraulic motor options: OMS, OMT and A2FM45, A2FM56 and A2FM63.
Maximum brake torque: 500 Nm, as listed in the supplied product data.
The following table consolidates the supplied GFB305 specifications. Confirm the applicable ratings, available ratio combinations and motor interfaces against the technical documentation for the selected configuration.
| Parameter | Specification |
|---|---|
| Model | GFB305 |
| Rated Output Torque | 5,000 Nm |
| Maximum Output Torque | 7,500 Nm |
| Single-Stage Reduction Ratios | 4.3 / 6.2 |
| Two-Stage Reduction Ratios | 15.3 / 18.1 / 24.5 / 38.4 |
| Three-Stage Reduction Ratios | 63.1 / 77.2 / 105 / 178 |
| Listed Hydraulic Motor Options | OMS / OMT / A2FM45 / A2FM56 / A2FM63 |
| Maximum Brake Torque | 500 Nm |
Technical note: Rated output torque and maximum output torque represent different operating limits. The listed maximum brake torque is a separate parameter and should not be interpreted as the gearbox's output torque rating. Confirm the applicable operating conditions and braking configuration before final equipment selection.
The planetary gear arrangement reduces input speed and transmits torque to the driven mechanism. The appropriate reduction ratio depends on the required output speed, operating torque and duty cycle.
The supplied data lists single-stage, two-stage and three-stage ratio options. Confirm the availability and applicable torque limits of the specific ratio required for your application.
OMS, OMT and A2FM45, A2FM56 and A2FM63 are listed as hydraulic motor options. Compatibility must be confirmed for the exact motor model, displacement, mounting flange, shaft or spline connection and operating conditions.
The supplied product data lists a maximum brake torque of 500 Nm. Confirm the required brake arrangement, relevant operating conditions and system-level load-holding requirements with the supplier.
The GFB305 may be evaluated for compatible swing drive and rotational power transmission applications where the required torque, reduction ratio, mounting arrangement and hydraulic configuration are suitable.
Construction and mobile equipment with compatible rotational drive systems.
Drilling machinery requiring planetary speed reduction.
Industrial equipment with hydraulic motor-driven rotation.
OEM machinery projects requiring a specified planetary gearbox configuration.
Replacement or retrofit projects where the existing mechanical interfaces can be verified.
These are potential application categories rather than confirmation of suitability for every machine. Final selection should account for the driven equipment, load characteristics, duty cycle and installation requirements.
Compare the equipment's rated operating torque with the gearbox specifications. Identify any peak loads, frequent starts or other operating conditions that could affect the required torque rating.
Provide the required input speed and target output speed so that a suitable reduction ratio can be evaluated. Confirm the corresponding torque and speed limits for the selected ratio.
Provide the hydraulic motor model, displacement and connection dimensions if the gearbox will be used with a hydraulic motor. Confirm the exact motor-to-gearbox interface before ordering.
Compare the gearbox mounting dimensions, bolt pattern, shaft or spline connection, output interface and installation space with the equipment drawing.
Confirm whether the application requires a brake and identify the applicable brake specifications. Do not assume that a particular brake configuration or certified lifting rating is included unless it is specified in the final technical documentation.
The following image is retained from the original product page as a visual reference. Verify that the displayed product corresponds to the GFB305 configuration being offered.
To help evaluate a suitable configuration, please provide the following information when requesting a quotation.
Existing gearbox model and nameplate photograph, if available.
Required rated output torque and target output speed.
Required reduction ratio and maximum input speed.
Hydraulic motor model and interface details.
Mounting dimensions and output connection drawing.
Brake requirements and the intended application.
Required quantity and delivery destination.
For replacement applications, compatibility should be confirmed using technical drawings and operating specifications. A similar model designation or nominal torque rating alone does not guarantee direct interchangeability.
Payment: The supplied terms are a 30% deposit and a 70% balance before shipment, generally by T/T. Confirm final payment terms in the order agreement.
Lead time: The original product information states approximately 35–40 days after receipt of payment. Confirm the schedule for the selected configuration before ordering.
Packaging: Wooden crates are listed as the standard packaging method. Confirm the packing dimensions and shipping requirements for the final order.
The supplied product data lists a rated output torque of 5,000 Nm and a maximum output torque of 7,500 Nm. Confirm the applicable ratings for the selected configuration and duty cycle.
The listed single-stage ratios are 4.3 and 6.2; the two-stage ratios are 15.3, 18.1, 24.5 and 38.4; and the three-stage ratios are 63.1, 77.2, 105 and 178.
The supplied product information lists OMS, OMT, A2FM45, A2FM56 and A2FM63 motor options. Confirm the exact motor model and mounting interface for the selected configuration.
The supplied product data lists a maximum brake torque of 500 Nm. Confirm the brake configuration and applicable operating requirements for your application.
Replacement suitability depends on the reduction ratio, torque requirements, mounting dimensions, output connection, motor interface and brake configuration. Provide the existing gearbox model and technical drawings for compatibility review.
Configuration requirements can be reviewed based on the required output torque, speed, shaft form, reduction ratio, hydraulic motor interface and intended equipment. Confirm the available options with the supplier.
The original product information does not specify a minimum order quantity in this section. Confirm the quantity and availability with the supplier when requesting a quotation.
