A keyway is an important connection feature that enables gears, pulleys, couplings, sprockets, and similar mechanical power transmission components to be securely connected to a shaft. To ensure reliable torque transmission between the shaft and hub, the keyway must be machined to the correct dimensions and appropriate tolerances.

At Erdişli Makina, we provide keyway cutting and machining services for machinery manufacturing, maintenance, overhaul, and spare-part requirements.

We perform precision keyway machining on machine components of various sizes according to technical drawings, existing samples, or specified connection dimensions.

What Is a Keyway?

A keyway is a machined slot designed to accommodate a key between a shaft and a gear, pulley, coupling, or other machine component mounted on the shaft.

The key mechanically transmits rotary motion and torque between the shaft and hub. For this purpose, appropriately sized keyways may be machined both on the shaft and inside the bore of the component mounted on it.

A correctly machined keyway helps ensure a secure connection and reliable torque transmission between the shaft and the connected component.

Erdişli Keyway Machining Service

During keyway machining, the width, depth, length, and position of the keyway must be determined according to the operating requirements of the component.

At Erdişli Makina, we provide keyway machining services for machine components with various dimensions and geometries.

Keyway machining can be performed on components such as:

• Gears

• Chain sprockets

• Timing pulleys

• Pulleys

• Couplings

• Bushings

• Hubs

• Flywheels

• Machine shafts

• Gearbox components

• Custom-manufactured machine parts

Internal Keyway Machining

For machine components with hubs, an internal keyway may be required inside the bore to provide a secure connection to the shaft.

Internal keyways are commonly used to secure gears, pulleys, chain sprockets, couplings, and similar components to shafts.

The keyway width and depth are determined according to the shaft diameter and the dimensions of the key to be used.

Accurate positioning and sizing of the internal keyway are essential to ensure proper installation of the component onto the shaft.

Shaft Keyway Machining

The other side of a keyed connection is the keyway machined into the shaft.

Keyways can be machined on machine shafts according to the required key dimensions and the specifications of the component to be connected.

The width, depth, length, and position of the shaft keyway should be suitable for the transmitted torque and the technical requirements of the connection.

In addition to newly manufactured shafts, keyway machining can also be performed on existing machine shafts for maintenance, overhaul, or connection modification requirements.

Keyway Machining for Gears

One of the important stages in gear manufacturing is preparing the hub and keyway for the shaft connection.

At Erdişli Makina, we can perform application-specific keyway machining on:

• Spur gears

• Helical gears

• Bevel gears

• Chain sprockets

• Timing pulleys

• Worm gears

• Bronze gears

• Cast polyamide gears

• Custom-manufactured gears

This enables us to complete not only the tooth geometry of the gear but also the mechanical connection details required for shaft mounting.

Machining from Technical Drawings or Samples

Keyways can be machined according to dimensions specified in technical drawings.

For maintenance and overhaul applications where technical drawings are unavailable, the required dimensions can also be determined from an existing shaft, hub, key, or sample component.

This capability provides an important advantage particularly for older machinery, imported equipment, and custom-built systems where technical documentation is unavailable.

Why Is Precision Important in Keyway Machining?

A keyed connection transmits torque within a mechanical system. Therefore, a keyway that is too narrow or too wide can negatively affect the performance of the connection.

An excessively narrow keyway can cause assembly problems, while excessive clearance can lead to impact, vibration, and wear during operation.

Similarly, incorrect positioning or improper keyway depth can prevent the key and shaft-hub connection from operating correctly.

For this reason, machining keyways according to the required dimensions and tolerances is essential for reliable operation.

Keyway Dimensions

Keyway dimensions are primarily determined according to the shaft diameter, key type, and technical requirements of the connection.

Before machining, parameters such as the following should be evaluated:

• Shaft diameter

• Key width

• Key height

• Keyway depth

• Keyway length

• Hub length

• Component material

• Transmitted torque

• Connection type

Where required, key and keyway dimensions can be machined in accordance with relevant technical standards.

Keyway Machining in Different Materials

Keyway machining is not limited to steel components. Depending on the technical properties and machinability of the component, keyways can also be machined in various other materials.

Depending on the application, keyways can be machined in components made from:

• Steel

• Alloy steel

• Bronze

• Aluminum

• Cast polyamide and suitable engineering plastics

Material properties are taken into consideration when determining the appropriate machining method and cutting parameters.

Applications of Keyway Machining

Keyway machining may be required in almost every industrial field involving mechanical power transmission.

Typical applications include:

• Machinery manufacturing

• Gearbox manufacturing and repair

• Industrial maintenance and overhaul

• Production lines

• Conveyor systems

• Agricultural machinery

• Textile machinery

• Packaging machinery

• Food processing machinery

• Metalworking machinery

• Automation systems

• Heavy industrial equipment

• Custom machinery manufacturing

Keyway Machining for Maintenance and Overhaul

Over extended periods of operation, wear may occur on the key or keyway in industrial machinery.

Particularly in connections where excessive clearance has developed, repeated impact during operation can gradually increase keyway deformation.

During maintenance and overhaul operations, the condition of the existing component can be evaluated and, where appropriate, the component may be re-machined or a new component can be manufactured with a suitable keyway.

This helps restore reliable operation of connections within the machine's power transmission system.

Custom Keyway Machining

For machinery and equipment requiring dimensions outside standard specifications, we provide custom keyway machining services.

Keyway width, depth, length, and position can be determined according to technical drawings or specific application requirements.

This enables us to provide tailored solutions particularly for custom-built machinery, older equipment, and non-standard shaft-hub connections.

Gear Manufacturing and Keyway Machining from a Single Source

With Erdişli Makina's gear manufacturing capabilities, we can provide not only keyway machining but also the production of the required gears and power transmission components.

From machining the gear tooth geometry and preparing the hub and shaft bore to cutting the keyway and completing the final component dimensions, various manufacturing stages can be managed within a single production process.

This approach helps provide greater control over the manufacturing process, particularly for custom production and replacement-part projects.

Why Erdişli Makina?

With experience in machine gear and spare-part manufacturing since 1987, we provide solutions for the manufacturing and machining requirements of industrial power transmission components.

Through machining based on technical drawings or existing samples, we provide keyway machining services for new production as well as maintenance, overhaul, and spare-part projects.

For gears, shafts, pulleys, couplings, sprockets, and various machine components, our goal is to provide precise and reliable machining according to the dimensions and connection requirements of each application.

For keyway cutting, internal keyway machining, shaft keyway machining, or custom keyway requirements, contact Erdişli Makina.