- Project report – fan bearing replacement, paint shop, Offenbach area
Replacing a fan bearing in an automotive paint shop – maintenance in the Offenbach area
1.40-metre fan including motor removed on a self-fabricated rail system
Bearing replacement and overhaul precisely within the weekend shutdown
When a fan bearing wears out in a paint shop, every day counts. The plant's fans run practically non-stop during production – in the worst case, a bearing failure can shut down the entire painting line.
At a large automotive industry company in the Offenbach area, we were entrusted with exactly this task: replacing the fan bearing on a large process air fan of an industrial paint shop.
The special feature: the fan impeller measures around 1.40 metres in diameter and sits directly on the drive motor – so the complete motor and fan unit had to be removed.
Our concept: one day of preparation, one day of execution – timed precisely to the plant's weekend shutdown. On Monday, production was running again as usual.
Project profile
- Project: Replacing a fan bearing in an automotive paint shop
- Location: Large automotive industry company in the Offenbach area (Rhine-Main region)
- Project duration: 2 working days – 1 day of preparation, 1 day of execution during the weekend shutdown
- Scope:
- Replacement of the fan bearing on a process air fan (impeller approx. 1.40 m in diameter)
- Fabrication and welding of a rail system for the removal on site
- Removal of the complete motor and fan unit with a gantry crane
- Electrical disconnection and reconnection by our own electricians
- Overhaul of the motor and installation of the new bearing
- Reinstallation, sealing and fixing of the unit
What role does the fan play in a paint shop?
Industrial paint shops permanently require large quantities of conditioned air.
Powerful fans ensure controlled airflow in the paint booths – and thus consistent paint quality.
These fans run almost without interruption during production. Their bearings are therefore among the most heavily stressed wear parts of the entire plant. If a worn bearing is not replaced in time, there is a risk of vibration, consequential damage to the motor and impeller – and, in the worst case, an unplanned shutdown of the paint shop.
That is why a bearing replacement is ideally carried out as a planned job: in a fixed maintenance window, with complete preparation – exactly as on this project.
Why was the removal so demanding?
The short answer: because the bearing was not freely accessible.
The approx. 1.40-metre fan impeller sits directly on the motor – and the complete unit is buried deep inside the plant.
Simple access from outside was not possible. To get to the bearing, the entire motor and impeller unit had to be pulled out of the plant in a controlled manner
– without damaging the adjacent control cabinets, cladding and pipework, and in the tightest of spaces between the plant components.
How do you pull a fan out of the plant "as if on rails"?
Our solution: a custom-made rail system on which the motor and fan unit could be run out of the plant like a train.
On the preparation day, our fitters fabricated and welded the rail system from square steel tubing directly on site – aligned exactly to the fan's withdrawal direction. The photos show clearly how the rail structure runs through the narrow aisle between the control cabinets right up to the plant.
In addition, a gantry crane was used. With it we were able to lift the motor and fan unit safely off its mounting stand after running it out and make it accessible for the overhaul.
This combination of rail system and gantry crane has two decisive advantages: the unit, weighing tonnes, moves in a controlled and guided manner at all times – and the removal also works where there is simply no room for a forklift or overhead crane.
Electrics from a single source:
Disconnection and reconnection by our own electricians
Before removal, the motor was properly disconnected by our own electricians – after the overhaul, they likewise handled the complete reconnection.
For the customer this means: no additional trade, no interface problems, no waiting times between mechanical and electrical work.
Mechanical removal, electrical work and recommissioning all come from a single source at Omega Mounting – a workflow that pays off especially in tight maintenance windows.
Overhaul, bearing replacement and reinstallation in one day
On the execution day, every step then dovetailed with the next:
- Disconnection of the motor by our electricians
- Running the motor and fan unit out on the rail system
- Lifting the unit off the mounting stand with the gantry crane
- Overhaul of the motor and installation of the new bearing
- Removal and refitting of the fan impeller
- Pushing the complete unit back in on the rail system
- Sealing and fixing the unit
- Reconnection and function check
The close-ups show the details of this work: the removed fan impeller, the taper bush of the hub and the neatly terminated terminal box after reconnection.
By the end of the weekend the plant was fully reassembled, sealed and ready for operation – production could start on Monday without restriction.
We bundle maintenance and repair in Offenbach under Maintenance and servicing in Offenbach.
Why Omega Mounting for industrial maintenance?
Our range of services for your job
As an installation and maintenance company from Rodgau, we are on site with industrial customers in the Offenbach area and throughout the Rhine-Main region in the shortest possible time. What sets us apart:
- Mechanical, welding and electrical work from a single source
-
Our own solutions for difficult removal situations
(rail systems, gantry crane, special structures) - Experience with maintenance in tight shutdown windows
- Complete work preparation: material, tools and team are ready before the plant stops
- Clean handover including sealing, fixing and function check
Conclusion – replacing a fan bearing in an automotive paint shop
A 1.40-metre fan, a deeply buried motor, a tight weekend window – and a solution tailored precisely to the situation:
With a self-fabricated rail system, a gantry crane and our own electricians, we replaced the fan bearing, overhauled the motor and put the plant back into operation on schedule.
For our customer from the large-scale automotive industry, this meant:
- no production downtime
- no coordination of trades
- a single point of contact
– and a plant that runs reliably again.
Does your plant need maintenance or repair?
Whether paint shop, ventilation equipment or production plant:
We take on maintenance, bearing replacement and repair – including in tight maintenance windows at the weekend or at night.
From Rodgau, we are quickly with you in Offenbach, Frankfurt, Hanau, Dietzenbach and the entire Rhine-Main region. What else we take on for paint shops – from new builds with the plant manufacturer to repairs during shutdowns – is described on our page installing, converting and maintaining paint shops. Further images from the same paint shop – chain conveyors, dryers and the inspection zone with light tunnel that we installed – can be found under maintenance in a running plant.
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About the author
Tobias Schott
Managing director of Omega Mounting GmbH, Rodgau · more than 20 years of hands-on experience in installation and maintenance
A trained mechatronics technician, at home in maintenance, servicing and industrial installation since 2004 – first alongside his father, and since 2012 with Omega Mounting: from the overhead conveyor in Frankfurt to the crane system in a new-build hall. As appointed person for lifting operations, he plans and leads lifting operations in data centers and on industrial sites in the Rhine-Main region, is an instructor and examiner for cranes, aerial work platforms and telehandlers, and a safety officer. On assignments abroad he is known as the "German Troubleshooter" – the one you call when things get stuck on site. He did not learn what quality means from a manual, but from his father: Made in Germany as a standard for his own work, not as a label. That is why quality comes first at Omega Mounting – before speed and before price. The project diary shows the jobs his team has planned and carried out – without customer names, but with everything that can be learned from them.
Frequently asked questions (FAQ) – Offenbach
Everything you need to know about our services
Why do fan bearings in paint shops have to be replaced?
The fans of a paint shop run almost without interruption during production. Their bearings therefore wear over time – often noticeable as vibration or running noise.
A timely, planned bearing replacement prevents consequential damage to the motor and impeller and protects against unplanned production downtime.
How do you replace the bearing on a large industrial fan?
If the impeller sits directly on the motor, the complete unit usually has to be removed. On this project we fabricated a rail system on site for this purpose, ran the unit out in a controlled manner, lifted it off the mounting stand with a gantry crane and reinstalled it in reverse order after the overhaul.
Can a bearing be replaced during a weekend shutdown?
Yes – with the right preparation. On this project, the rail system was fabricated and everything made ready on the preparation day; the actual removal, overhaul and reinstallation took place on a single day during the weekend shutdown. On Monday, production was running normally again.
Why is a rail system used instead of a crane?
In many plants there is simply no room for a forklift or overhead crane. A custom-made rail system guides the heavy unit in a controlled manner in the withdrawal direction – combined with a compact gantry crane, the load can be lifted and set down safely even in the tightest of spaces.
Does Omega Mounting also take on the electrical work?
Yes. Our own electricians disconnected the motor before removal and reconnected it after the overhaul. Mechanical, welding and electrical work come from a single source with us – without interfaces between different companies.
Does Omega Mounting carry out maintenance in the Offenbach area?
Yes. Our head office is in Rodgau in the Offenbach district –
maintenance and servicing jobs in Offenbach, Frankfurt, Hanau and the entire Rhine-Main region are part of our core business.
Short-notice jobs and weekend shutdowns can also be planned.
Contact & location near Offenbach
On site with you soon - with flexibility and reliability
- Hügelstraße 5, 63110 Rodgau
- Service area: Offenbach, Frankfurt, Hanau and the entire Rhine-Main region
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