BGB

BGB contact details

BGB (UK) head office and manufacturing

Dysart Road
Grantham, Lincolnshire NG31 7NB
United Kingdom

Telephone +44 1476 576280

Website bgbinnovation.com

BGB sales

Unit 1&2 Turnpike Close, off Swingbridge Road
Grantham, Lincolnshire NG31 7XU
United Kingdom

Telephone +44 1476 576280

Web bgbinnovation.com/contact-us

BGB (USA)

1060 Port Walthall Drive
Colonial Heights, VA 23834
United States

Telephone +1 804 451 5211

Web bgbinnovation.com/contact-us

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Contact details as published by BGB (family-owned; legal entity name not stated on its website), checked 2026-10-30. Specify Motion is not affiliated with BGB (family-owned; legal entity name not stated on its website).

BGB product lines

Who BGB is

BGB is a British manufacturer of rotary transfer products: slip rings, complete slip ring assemblies, fibre optic rotary joints (FORJs) and hydraulic rotary unions. It is based in Grantham, Lincolnshire, with a second manufacturing plant in Virginia, USA. Engineers in renewable energy know BGB best for wind turbine slip rings: the company says it has sold more than 1,000,000 rotary solutions into the wind industry and describes itself as the market leader in rotary solutions for renewable energy, primarily wind.

For UK OEMs, BGB is one of the few slip ring makers that designs and builds in Britain, which matters when a project wants a local partner for custom assemblies, repairs or refurbishment of existing units.

History and ownership

BGB’s history page tells the story of a family business:

• 1976: founded by three work colleagues; the name comes from the initials of their wives, Beryl, Geraldine and Barbara. The business began making carbon brush holders.
• Late 1970s: the partnership shrinks to two, Gordon and David, working from a makeshift workshop in Leicestershire.
• 1980s: after renting space in Grantham, they take over a former shoe factory on Dysart Road, still the main site. The partnership dissolves, leaving David Holt Snr as sole owner, and slip ring production begins.
• 1990s: the first packaged slip ring assembly for the wastewater industry, and the first wind-specific pitch control slip ring, supplied to turbine makers through a Danish agent.
• 2009: the Dysart Road expansion is completed and BGB wins the Queen’s Award for Export. The FORJ is developed in the same decade.
• 2012: BGB Technology Inc. is formed in Richmond, Virginia, to serve the Americas.
• 2013: entry into induction power transfer, with a lighting system for luxury yachts.
• 2017: a second Grantham site opens for R&D, testing and commercial staff.
• 2019: under David Holt Jnr, all divisions are brought together under the single BGB brand.

BGB marks its 50th year in June 2026. Its website does not give a legal entity name, headcount or current shareholding, so we have not stated them.

Product portfolio

Our series records summarise what BGB publishes for each line. BGB publishes few numeric ratings, because much of its work is built to order.

• Wind turbine slip rings: hub and pitch control power and signal assemblies (for example 10/11, 14 and 35-way units) and 3-way power slip rings, new and as aftermarket replacements for widely used turbine platforms. BGB also offers through-bore, pancake, high-current, capsule and fibre optic types for wind.
• Modular and barrel slip ring assemblies: packaged units for slow to medium speeds, with modular types carrying power up to 30 A plus signals, built with mounting, termination and sealing for wastewater and industrial plant.
• Pancake slip rings: flat face-type rings where axial length is limited, including 3-way and 17-way catalogue parts, for robotics, aerospace, marine and revolving doors.
• FJ1 FORJ: a stainless steel fibre optic rotary joint, single-channel multimode as standard with single-mode and multi-channel (FJ2, FJ3) on request. It is sealed to IP68, tested to military vibration standards and offered with ST, SC, LC or FC connectors. Miniature, L-type and wavelength-division variants are also listed.
• Rotary unions: hydraulic unions with a four-port flagship design and custom builds, often combined with a slip ring or FORJ in one package for cranes, excavators and wind turbine pitch systems.

BGB also makes brush holders, aftermarket wind brushes, lightning protection systems and condition-monitoring upgrades, and runs a slip ring repair and refurbishment service.

Technologies and standards

BGB’s strengths are custom electromechanical design, combined slip ring, FORJ and rotary union packages, and lifecycle service. It tests FORJs to EN 2591-601 for optical insertion loss, and uses in-house and UKAS-accredited facilities for vibration testing. For guidance on specifying a ring of this kind, see how to specify a slip ring, our pages on slip rings for wind turbines and fibre optic rotary joints, and the rotary union type page.

Industries served

BGB lists wind and renewable energy, wastewater and utilities, construction plant, rail, shipping and EV charging, industrial machinery, media and film, simulators, and aerospace applications such as drones, ROVs and radar. Its primary European export markets are Scandinavia, Spain and Germany.

Global and UK presence

BGB runs two sites in Grantham, one on Dysart Road and one at Turnpike Close, plus the US plant at Colonial Heights, Virginia. It exports to more than 77 countries, with exports making up over 90 % of turnover, and lists distribution partners on its website. UK engineers can deal with the Grantham team directly.

What to send when specifying a BGB slip ring

Give the number of power and signal circuits with current and voltage for each, any data bus or fibre count, bore and envelope, speed, environment (temperature, IP, vibration), expected life, and any hydraulic or pneumatic passages. For a replacement, the existing part number or turbine platform helps.

Specify Motion is independent of BGB. Our engineers can help source BGB products or propose equivalents from our supply network on published figures; see find a replacement or the slip rings hub.

BGB history: key dates

1. 1976Founded by three colleagues; the name comes from the initials of their wives, Beryl, Geraldine and Barbara
2. 1980sMoves into a former shoe factory on Dysart Road, Grantham; slip ring production begins
3. 1990sFirst wind-specific pitch control slip ring supplied
4. 2009Dysart Road expansion completed; Queen's Award for Export
5. 2012BGB Technology Inc. formed in Richmond, Virginia, for the Americas
6. 2017Second Grantham site opened for R&D, testing and commercial teams
7. 2019All divisions brought together under the single BGB brand
8. 2026Marks its 50th year in June 2026

BGB slip rings

Slip rings

Wind turbine slip rings

Pitch-control, hub and power slip rings for wind turbines, supplied new and as aftermarket replacements for major turbine platforms, with through-bore, pancake, high-current, capsule and fibre optic variants.

Pancake slip rings

Pancake slip rings

Flat face-type slip rings for installations where axial length must be minimised, configurable for power, data or both, including 3-way and 17-way face-type catalogue parts.

Slip rings

Modular and barrel slip ring assemblies

Packaged barrel and modular slip ring assemblies for slow to medium speeds, carrying power up to 30 A and signals, built with mounting, termination and sealing for continuous rotation in industrial and wastewater plant.

Fibre optic rotary joints

FJ1 FORJ

Stainless steel fibre optic rotary joint, single-channel multimode as standard with single-mode and multi-channel (FJ2, FJ3) on request, IP68 sealed and tested to military vibration standards.

Rotary unions and hybrid joints

Rotary unions

Hydraulic rotary unions with a four-port flagship design (ports can be blocked off) and custom builds, often combined with BGB slip rings or FORJs in a single package.

Frequently asked questions

What is BGB's website?

BGB's official website is bgbinnovation.com. It covers slip rings and slip ring assemblies, wind turbine slip rings and spares, pancake slip rings, fibre optic rotary joints, rotary unions, brush holders, lightning protection, repair services, a product catalogue, company history and a contact page with its UK and US sites.

What is BGB's phone number?

BGB publishes +44 (0)1476 576280 for enquiries to its UK head office and sales team in Grantham, and +1 804 451 5211 for callers in the USA. Its contact page also offers sales and US sales email links, but the addresses are hidden behind a protection script, so we have not reproduced them.

Where is BGB based?

BGB's main UK site is on Dysart Road, Grantham, Lincolnshire NG31 7NB, with a sales and R&D site at Unit 1&2 Turnpike Close, Grantham NG31 7XU. Its US site is at 1060 Port Walthall Drive, Colonial Heights, Virginia 23834.

Who owns BGB?

BGB began in 1976 as a family-owned business. Its history page says co-founder David Holt Snr became sole owner after the original partnership dissolved, and that under David Holt Jnr the divisions were combined under the single BGB brand in 2019. The website does not state its current legal entity or shareholding.

Is BGB a UK slip ring manufacturer?

Yes. BGB designs and manufactures slip rings, fibre optic rotary joints and rotary unions at two sites in Grantham, Lincolnshire, and also manufactures in Virginia, USA. It says more than 90 % of its turnover comes from exports, to over 77 countries.

What does BGB make?

BGB makes slip rings (barrel, modular, pancake, capsule and fabricated), complete slip ring assemblies, wind turbine pitch and power slip rings, fibre optic rotary joints, hydraulic rotary unions, brush holders and brushes, and lightning protection systems, and it repairs and refurbishes slip rings.

Sources

1. BGB: Contact us
2. BGB: History
3. BGB: Company profile
4. BGB: Home page
5. BGB: Slip rings
6. BGB: Slip ring assemblies
7. BGB: Wind turbine slip rings
8. BGB: Pancake slip rings
9. BGB: FORJ (fibre optic rotary joints)
10. BGB: Rotary unions

Figures are summarised from the sources above and from manufacturers' published data on the date shown. Always confirm against the current datasheet for your exact part.