Liners

Precision Machined Liners

Pattern Fasteners manufactures custom liners and precision-machined liner components for engineering, machinery and industrial applications.

Liners are commonly used to provide a controlled internal surface, protect a housing or bore from wear, improve alignment, or create a replaceable interface between moving or mating components.

We manufacture liners to customer drawings, samples and individual specifications, including non-standard diameters, wall thicknesses, lengths, flanges, shoulders, grooves and other machined features.

Custom & Bespoke Liners

Where a standard liner is unavailable or unsuitable, Pattern Fasteners can manufacture components specifically for the application.

Custom liner features can include:

• Precision internal bores

• Non-standard outside diameters

• Controlled wall thicknesses

• Stepped diameters

• Shoulders

• Flanges

• Counterbores

• Grooves and undercuts

• Cross holes

• Internal or external threads

• Chamfers

• Special end forms

Liners can be produced as simple cylindrical sleeves or as more complex machined components incorporating several functional features.

What Are Liners Used For?

Liners are used across a wide range of mechanical and engineering assemblies.

Typical functions include:

• Protecting housings from wear

• Providing a replaceable internal surface

• Supporting shafts or moving components

• Maintaining alignment

• Controlling fit between mating parts

• Acting as a sleeve or spacer

• Reducing direct contact between components

• Extending the service life of larger assemblies

Sleeve Liners

Sleeve-style liners are typically fitted into a bore or housing to provide a controlled internal diameter.

They may be used as a wear surface, locating feature or replaceable insert where it is preferable to replace the liner rather than the complete surrounding component.

Flanged Liners

Flanged liners incorporate an enlarged section at one end.

The flange can help control installation depth, provide axial location or create an additional bearing surface against the surrounding assembly.

Pattern Fasteners can manufacture flanged liners with custom flange diameters, thicknesses, bores and overall lengths.

Stepped & Shouldered Liners

Where different sections of an assembly require different diameters, liners can be manufactured with stepped or shouldered profiles.

These features can help:

• Improve location

• Control insertion depth

• Interface with multiple bore sizes

• Provide additional support

• Combine several functions within a single component

Liner Materials

Pattern Fasteners can manufacture liners from a wide range of engineering materials, including:

• Mild and carbon steels

• Alloy steels

• Stainless steels

• Aluminium

• Brass

• Bronze

• Copper and copper alloys

• Nickel alloys

• Specialist engineering materials

Material selection will depend on factors such as wear resistance, corrosion resistance, operating temperature, strength and compatibility with mating components.

Stainless Steel Liners

Stainless steel liners are suitable for applications where corrosion resistance and durability are important.

They can be manufactured in a range of grades to suit industrial, outdoor and specialist engineering environments.

Brass & Bronze Liners

Brass and bronze can be suitable for liner applications where good machinability, corrosion resistance or bearing characteristics are required.

The appropriate material will depend on the loading, movement and operating conditions of the assembly.

Liners Made to Drawing

Many liner requirements are application-specific, particularly where bore size, outside diameter, wall thickness or flange dimensions need to be closely controlled.

Pattern Fasteners can manufacture directly from your engineering drawing, physical sample or dimensional specification.

This is particularly useful for:

• Replacement components

• Obsolete machinery

• Prototype assemblies

• Specialist equipment

• Repair and refurbishment

• Bespoke engineering systems

Precision & Tolerances

Where a liner performs a locating, wear or bearing function, dimensional accuracy can be critical.

Bore diameter, outside diameter, concentricity, wall thickness, overall length and shoulder positions can all be manufactured to suit customer-defined tolerances.

Specific surface finishes can also be reviewed as part of the quotation process.

UK Manufacturer of Custom Liners

Pattern Fasteners manufactures special fasteners and precision-engineered components in the West Midlands.

Whether you require a simple sleeve liner or a more complex flanged, stepped or threaded component, we can manufacture to your drawing or specification.

Need a Custom Liner?

Send us your drawing, sample or specification and our team can review the material, dimensions, tolerances and manufacturing requirements for your component.