Bushings are essential components in precision engineering, designed to ensure precise centring, alignment and protection against wear between moving mechanical parts.
OMGM manufactures precision bushings to customer drawings, using high-accuracy CNC machining processes to achieve tight tolerances and consistent quality.
A bushing is a cylindrical component used to guide, centre or support another part, such as a shaft or a pin. Depending on the application, bushings can perform several functions:
Mechanical bushings differ in function and geometry depending on their intended application. The main types include:
Used to ensure precise alignment between mating components, such as flanges or mounting plates.
Used in sliding systems or moulds, providing controlled and repeatable linear motion.ineari controllati e costanti.
Act as an interface between the shaft and its support, reducing wear and simplifying replacement during maintenance.
Manufactured to technical drawings and adapted to specific assembly or fitting requirements, with customised dimensions, holes and threads.
Bushings can be manufactured from a wide range of materials, selected according to operating conditions and the role the bushing plays within the mechanical assembly. Most frequently used materials in bushing manufacturing include:
1
CARBON STEELS
suitable for high-strength applications requiring rigidity, durability and resistance to heavy loads.
2
CAST IRON
valued for its vibration-damping properties and dimensional stability.
3
BRONZE
which reduces friction, limits wear and improves sliding behaviour, making it the preferred material for bushings used in continuous or high-precision motion.
4
LIGHTWEIGHT ALUMINIUM ALLOYS
ideal for applications requiring reduced weight, good corrosion resistance and high dynamic performance. Commonly used in automatic machinery, robotics and components designed to minimise mass and inertia.
Bushings are produced in-house using a machining cycle that combines multi-axis CNC technology with 3D metrology inspection.
The process includes turning, boring and grinding, ensuring precise geometries and controlled surface roughness.
Each component is inspected at different stages of production using certified measuring equipment to verify compliance with design tolerances.
Full in-house management of the entire manufacturing process ensures repeatability, traceability and consistent quality over time.
PARAMETER
Machinable diameters
Length
Materials
Geometric tolerances
Machining
processes
Heat
treatments
CAPACITY / DETAILS
Up to Ø450 mm
300 mm
Carbon steel, stainless steel, aluminium, brass, cast iron
Up to 5 µm
CNC turning, boring, internal/external threading, chamfers, grooves
Quenching and tempering, cementing, hardening, induction hardening, nitriding
PARAMETER
Surface
treatments
Finishes
Dimensional
inspection
Production batches
Types
CAPACITY / DETAILS
Zinc plating, passivation, phosphating, anodisation, nickel plating, painting, bluing
Roughness Ra ≤ 1.6 µm
EN 10204 3.1 material certificates, 3D dimensional inspection, FAIR
Single components and small batches up to 50 pieces
Plain, spacer, centring, taper and threaded bushings
Mechanical bushings are support and guiding components used wherever friction reduction, alignment, smooth motion and shaft protection are required. For this reason, they are employed across a wide range of industries:
Used in tool change systems, feed units, internal handling and positioning mechanisms, where maximum accuracy and repeatability are required.
The main application sector for mechanical cams. They are essential for synchronised motion, continuous high-speed cycles, pick-and-place systems, dosing units and complex movements typical of automatic machinery.
Applied in blister machines, dosing equipment, sterile packaging lines and high-cleanliness automatic systems, where controlled and consistent motion is critical for the end product quality.
Used in mechatronic systems, actuators, control mechanisms and kinematic assemblies operating under vibration and severe environmental conditions.
Used to synchronise processing and packaging operations, ensuring reliable performance in environments subject to frequent washdowns and repetitive high-speed cycles.
Employed in assembly systems, automated production lines, test benches and mechanisms requiring programmed motion and high resistance to wear.
A mechanical bushing is a precision component used in industrial applications and precision engineering to guide, support or centre moving parts.
Selection depends on load, type of movement, shaft material and operating environment. For precision applications, bushings manufactured to technical drawings with controlled tolerances and certified materials are recommended.
Replacement involves removing the worn bushing and installing the replacement bushing in its housing, checking correct squareness and alignment with the shaft. Accurate installation ensures durability and reliable system operation.
