Welcome to Electro Inductors Ltd & Aluminium Inductors Ltd

With more than 50 years experience in coil winding, Electro Inductors Ltd, together with its subsidiary Aluminium Inductors Ltd, has earned international recognition of its expertise in the field for quality and design.

We offer a bespoke service and specialise in small to medium batch and production one-offs.

We are always pleased to discuss your requirements and invite you to call us on +44 (0)1954 – 789696

Coil Winding

Contactor coils, relay coils, brake coils and clutch coils.

General coil winding and associated items produced using our wide variety of machines and processes. Wound in all sizes using bobbins supplied by the customer, made in-house or bought in. For lifts/elevators, escalators and other equipment and machinery.

Orthocyclic Winding

Our speciality is perfect layer winding using copper wire. Perfect layer or orthocyclic windings are produced by layering each turn of wire into the groove of the turns underneath. It is the most space efficient type of winding using round wire and has the best thermal conduction and physical strength.

Welcome to Aluminium Inductors

AI have been providing a highly specialised design and manufacture service world-wide since 1964.

As an ISO9001 quality assured company, all our products are manufactured to a high quality standard as well as an individual customer specification. We are also conflict mineral free.

We are vastly experienced in many industry sectors and have been providing companies in the traction, mining and marine industries for a number of years.

Aluminium or Copper?

This is a common question asked when trying to get the best performance and cost efficient results for your coils.


Copper has one of the highest electrical conductivity rates among metals, which allows it to be soldered with ease. It also makes it possible for smaller conductors to be used to transmit power loads. Smaller conductors are easier to transport and install, and they cost less, which helps manage wiring costs. Copper doesn’t undergo the same extreme expansion and contraction cycles as aluminium so it is a more stable material to use.

Due to its high ductile properties, copper can be formed into very fine wire making it more versatile. Copper has a high tensile strength as well, so it can undergo extreme stress but show minimal signs of wear and tear. This makes the wiring more durable than aluminium. Copper wire has great resilience, high durability, low maintenance, and high performance.


Due to its lightweight nature, aluminium is malleable and easy to work with, whereas copper is heavier which can add to the difficulty in wiring.  Less support is required for Aluminium reducing the cost further.  Aluminium also reduces corona, an electric discharge associated with high power transmissions.

When it comes to cost, Aluminium is more affordable than copper wire. With Aluminium you will require about half the amount you would if copper wire were used instead.