Lufkin Gears / Allen Gears gearboxes and couplings

Complete transmission units, couplings and spare parts for industrial projects and equipment replacement. We work from the duty specification, drive layout and connection drawings.

High-speed parallel-shaft gearboxes

Lufkin Gears and Allen Gears transmission units for turbomachinery and industrial drives. Define the operating duty and shaft arrangement before specifying the complete gearbox or replacement assembly.

Portfolio speeds up to 70,000 rpm
Portfolio power up to 100 MW
Cast or fabricated casings
Lubrication and condition monitoring

Lufkin Gears low-speed gearboxes

Transmission solutions for heavy industrial machines, pumps, mills and conveyors. Specify the shaft arrangement, ratio, mounting interfaces and required auxiliary systems for a complete replacement project.

Multiple input and output shafts
Horizontal and vertical arrangements
Lubrication and instrumentation
Application-specific configurations

Allen Gears epicyclic gearboxes

Epicyclic and combined transmission arrangements for industrial and marine duties. Identify each power path and the location of a replacement stage within the complete assembly.

Epicyclic transmission stages
Parallel-shaft combinations
Bevel gear combinations
Assembly-based specification

Marine gears and propulsion systems

Lufkin Gears and Allen Gears marine transmissions can integrate propulsion auxiliaries. Define the boundary between the main gearbox and the vessel systems before comparing equipment packages.

Propulsion thrust bearings
Clutches and brakes
Turning gear and shaft locks
Oil systems and control units

Lufkin Gears AFC gear couplings

A compact gear coupling series for industrial transmission duties. Supply the full designation, shaft bores, fitting details, shaft-end separation and operating speed when requesting a quotation.

Shaft diameters up to 265 mm
Centering ring construction
Application-based balancing
Defined coupling-half scope

Lufkin Gears AFX gear couplings

A gear coupling series for heavy industrial duties and high loads. A partial replacement requires documented compatibility with the retained coupling elements and the existing shaft interfaces.

Shaft diameters up to 900 mm
Removable sleeve covers
Heavy industrial applications
Custom configurations

Transmission portfolio and project scope

Lufkin Gears and Allen Gears are presented within the Baker Hughes industrial power transmission portfolio. The range includes parallel-shaft, helical, bevel, epicyclic and combined arrangements, together with gear couplings and integrally geared solutions.

The equipment connects prime movers and driven machinery in industrial and marine applications. A project enquiry should identify the actual transmission function rather than use a brand name as the complete specification.

Describe the prime mover, the driven machine and the intended operating duty. For an installed unit, attach its nameplate and general arrangement drawing.

Historical documentation may use an earlier company designation; retain the complete record so that the unit can be identified without relying on a shortened description.

Duty data for a complete gearbox

State the required power, input and output speeds, ratio, operating pattern and installation orientation. Include the available space, shaft positions, mounting arrangement and connection drawings.

Distinguish the normal operating condition from any other condition that the project requires the equipment to accommodate. Mark customer requirements separately from values copied from an existing nameplate.

The high-speed parallel-shaft portfolio includes configurations reaching 70,000 rpm and 100 MW. These are portfolio limits and do not describe every unit or a single universal operating point. A replacement specification must use the ratings and interfaces applicable to the actual machine.

The complete package should identify both the main gearbox and its auxiliaries.

Low-speed and heavy industrial applications

Lufkin Gears low-speed products serve applications including pumps, mills, conveyors and other heavy industrial machinery. The manufacturer describes multiple shaft arrangements and application-specific accessories.

For an equipment replacement, document the mounting interface, shaft locations, ratio and relationship to the retained machinery. This gives the engineering enquiry a clear physical and functional boundary.

List the components that remain in service, such as the motor, coupling, foundation or lubrication package. Attach the existing drawings and identify any previous modifications. A replacement proposal can then distinguish an unchanged interface from an interface requiring adaptation.

Nominal power alone is insufficient to describe this scope.

Epicyclic and combined transmissions

Allen Gears solutions include epicyclic transmissions and combinations with parallel-shaft and bevel stages. A combined arrangement needs a power-flow description showing each input and output. When replacing an internal stage, identify its position in the assembly and its drawing reference.

For a complete unit, define the connections to the surrounding drive and the installation envelope.

Separate mandatory project interfaces from changes that may be considered during engineering. State whether the existing foundation, shaft line, control system and oil system must remain. Include the relevant documents for each retained component.

The enquiry should make these requirements visible before alternative transmission arrangements are compared.

Marine propulsion package interfaces

Marine transmission configurations can include thrust bearings, clutches, brakes, turning gear, shaft locks, oil systems and control units. The equipment boundary therefore extends beyond the main gear casing.

Identify the propulsion arrangement, input machinery, required output and all auxiliary systems included in the project. Supply the installation drawing and the technical requirements for the vessel application.

A replacement project should also identify retained pumps, instruments, control equipment and shaft connections. Keep the documentation and acceptance requirements in the same scope sheet as the mechanical package.

This supports comparison of offers on a consistent basis and clarifies which integration tasks belong to the vessel installation.

Specifying AFC and AFX couplings

The AFC series is a compact gear coupling range, while AFX addresses heavy industrial applications and uses removable sleeve covers. The manufacturer describes AFC shaft diameters up to 265 mm and AFX shaft diameters up to 900 mm.

The series name and shaft diameter are starting points for identification; the complete designation and the application data are still required.

Provide both shaft bore details, fitting requirements, shaft-end separation, operating speed and the coupling drawing. State whether the enquiry covers a complete coupling, one half or individual components. Where a spacer is used, include its drawing dimension.

A partial replacement must be checked against the retained elements, rather than selected from visual similarity.

Lubrication, bearings and monitoring

The transmission portfolio includes lubrication and monitoring systems, together with journal and thrust bearing technologies. For a project package, define which oil-system components and instruments are included with the main unit.

Attach the system diagram and identify the required connections to the plant. For a replacement component, provide its own marking and drawing reference as well as the gearbox number.

Separate an individual instrument or filter element from an assembled subsystem with piping and accessories. If an operating symptom initiated the enquiry, include the relevant observations and inspection record.

Those records help formulate the request; they do not replace the equipment instructions or an engineering assessment of the cause.

Equipment identification and spare parts

For spare parts, send a readable photograph of the full nameplate, a general view and the relevant assembly drawing. Record the serial number, model and item reference exactly as shown. Keep revision marks and suffixes.

If a removed component is photographed or measured, distinguish observed dimensions from nominal drawing values and record any known previous repair.

Define whether the requirement is a single gear, a shaft assembly, a bearing unit, a seal, a coupling component or a complete replacement gearbox. The agreed scope should describe the supplied items in terms that can later be checked at receipt.

This avoids treating an informal component name as a complete purchase specification.

Assessment, repair or replacement

The manufacturer describes an engineering assessment before deciding whether equipment or a component should be repaired or replaced. For an enquiry, prepare the inspection report, photographs and available operating history. Separate observed symptoms from a proposed explanation.

A list of parts alone does not establish that the complete drive has been restored to its required condition.

Alternative scopes may cover parts for an approved repair, a replacement assembly or a complete reserve gearbox. Compare their interfaces, included auxiliaries, documentation and acceptance requirements. The method of repair and the return-to-service criteria belong to the specific engineering plan.

Manufacturer service capabilities should not be confused with the scope of a procurement enquiry.

Purchase specification and receipt checks

Prepare an itemised scope sheet with the equipment designation, quantity, drawings and required documents. Distinguish the main transmission, couplings, oil system, instruments, controls and installation accessories. Identify customer-retained items explicitly.

This creates one reference for the enquiry, technical clarification and subsequent receipt inspection.

At receipt, compare markings, quantities and visible completeness with the agreed specification. Retain package and nameplate photographs and keep assemblies together until their item list has been checked.

Installation and commissioning follow the applicable equipment documentation and the approved project procedure. Record any discrepancy against the specific item before incorporating it into the drive.

Lufkin Gears / Allen Gears and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Lufkin Gears / Allen Gears and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.