A motion-engineering trade fair is not a shop. It is a compressed map of who actually makes what, and it is one of the few places where a bearing buyer can compare a dozen suppliers of the same product family in a single afternoon without booking a single flight. The value is not in the catalogues you collect - it is in the questions you ask and the evidence you take home.
This guide is about method. It explains what a motion show actually exhibits across drives, gearing, linear systems, and bearing and sealing technology, why a bearing buyer should care, and how to turn two days on a stand floor into a shortlist of suppliers that can survive a real qualification. It deliberately avoids quoting any particular edition's dates or visitor numbers, because those change every year and none of them help you choose a supplier.
- Shortlist before you travel. Decide the product families you need and book meetings, rather than walking the floor hoping to be found.
- Ask for evidence, not catalogues. A drawing, a measurement report and a sample protocol tell you more than a glossy brochure ever will.
- A manufacturer and a trader are both legitimate - they answer different questions and belong on different lines of your shortlist.
- A fair is not an audit. Qualification still requires samples, dimensional measurement and repeat orders after you get home.
What a motion fair actually shows
A motion show is a category of event rather than a single exhibition, and the floor is normally organised around four product groups that a machine builder buys together: drive technology, gearing, linear motion, and bearing and sealing technology. The reason to walk all four is that a bearing rarely fails alone - it fails inside a system whose misalignment, lubrication or preload was set by the components around it.
The bearing and sealing halls are where you find manufacturers covering the full geometry range: deep groove ball bearings, angular contact pairs, tapered roller and self-aligning roller designs, and the sealing and lubrication technology that keeps them alive. A trade fair is unusual in the industry because it places a company that makes only 20 mm bore spindle bearings next to one that makes 2 m slewing rings, and lets you read both the same day. The same hall can hold a range from an 8 mm bore miniature bearing to a 500 mm bore spherical roller, spanning tolerance classes from P0 to P4.
The four product groups you will walk past
Most visitors walk the floor by geography. A buyer should walk it by function, because each group answers a different part of the same sourcing question.
| Product group | Typical exhibits | What a bearing buyer takes from it |
|---|---|---|
| Drive technology | Motors, gearmotors, converters, couplings | RPM, torque and duty cycle that set the bearing speed and load case |
| Gearing | Gearboxes, worm drives, planetary units | Where the high radial and axial loads concentrate, and which shaft positions carry them |
| Linear motion | Ball screws, profile rails, guides | Preload, stroke and contamination control that mirror rolling bearing practice |
| Bearing and sealing | Ball, roller, plain and mounted bearings; seals and lubricants | The actual product families, tolerance classes, cages and greases you can order |
Why a bearing buyer should care
The case for attending is commercial before it is technical. A buyer sourcing bearings across many product families needs to know, at a minimum, who manufactures rather than relabels, who can hold a tolerance class, and who can show a measurement report for the actual lot rather than a certificate in a frame. A fair compresses that reconnaissance into days instead of quarter-long email cycles.
The second reason is geography. Motion shows cluster around the same industrial regions that supply the bearings themselves, which is why the bearing production clusters and their nearest trade fairs should be planned as one trip rather than two. Seeing the exhibitor list of a show is a quick way to map which regions are active in which product family right now. If your requirement is a specific machine type rather than a part, the industry pages translate an application into the bearing positions that drive it, and the bearing type selection guide works the mapping from duty to family.
What a fair will not give you is verification. An exhibition stand is a presentation; a qualified supplier is a measurement history. The whole skill of using a fair is knowing which of the two you are looking at.
How to prepare before you travel
Preparation is what separates a buyer from a visitor. Two weeks of planning turn a two-day show into a shortlist; the absence of it turns the same two days into a bag of catalogues.
Shortlist by product family, not by brand
Start from your actual bill of materials, not from the exhibitor list. Group your open positions by product family - deep groove ball, tapered roller, angular contact, self-aligning, mounted units - and for each family write the dimensions, the load case, the speed and the tolerance class you need. A supplier who is excellent in one family is often absent from another, and the exhibitor list becomes far shorter once you filter it against that list.
Book meetings rather than walking the floor
Book a 15-minute slot with each target supplier before you travel, and say what you want to see. A booked meeting with a stated topic gets you the engineering contact; an unannounced stand visit gets you a sales script. Ask them to bring a measurement report for a bearing of the size you care about.
| Stage | Action | Output you must leave with |
|---|---|---|
| Three weeks out | Group open positions by product family with dimensions and duty | A one-page target list per family |
| Two weeks out | Filter the exhibitor list against the target list | 8 candidates, not 60 |
| One week out | Book meetings and state the topic and the size you want to discuss | A timed agenda with named contacts |
| Day before | Prepare a drawing, a specification list and a sample request | A printed pack you can hand over |
| On the floor | Ask the stand questions, collect reports, agree the next step | A named contact and a dated follow-up action |
What to ask at the stand
A catalogue tells you what a company makes. A few pointed questions tell you whether they can hold a specification. Ask for the answer in writing where possible, because the quality of the written answer is itself evidence.
- Clearance and fit. Can they state the internal clearance class and the recommended shaft and housing fits for the exact size, and quote the numbers rather than the class letter alone? Clearance ranges come from ISO 5753 and fits from the ISO 286 tables; a C3 band on a 25 mm bore, for example, spans roughly 10 to 20 µm.
- Cage design. Stamped steel, polyamide or machined brass, and what each does to the speed ceiling and the temperature limit - a polyamide cage is typically limited to about 120 °C and a machined brass cage to about 250 °C.
- Measurement report. A dimensional report for a real lot, showing bore, outside diameter, width and runout against ISO 492, typically to a few micrometres and with runout held within 5 µm or better, not a generic certificate of conformity.
- Traceability. Can they trace a finished bearing back to the steel lot and the heat-treatment batch?
- Sample and protocol. Will they supply a sample with a stated test protocol, and who signs the result?
- Rating basis. Which load rating do their tables use, and is the life calculation under ISO 281 done on their own rating or on a nominal one?
A question set per product family
The same three or four questions do most of the work in every family, but the emphasis shifts.
| Product family | Question to ask | A good answer looks like |
|---|---|---|
| Deep groove ball | What clearance class and grease fill are standard, and can both be varied? | A quoted clearance range in micrometres and a named grease class |
| Tapered roller | Are the cups and cones matched, and how is the assembled width controlled? | Cone and cup recorded separately with a mounting-width tolerance |
| Angular contact | What universal matching and preload do you offer, and how is it verified? | DT, DB and DF sets with a stated light or medium preload |
| Self-aligning roller | What misalignment can the design take, and what limits it? | A stated angle range and the cage or seal that constrains it |
| Mounted units | What housing material and insert fits are used, and is the grease releasable? | A specified housing grade and a relubrication path |
If a stand cannot answer clearance, fit or cage questions, that is not a reason to walk away - it is information about which line of your shortlist the company belongs on.
Manufacturer versus trader at the same fair
Both a manufacturer and a trading company exhibit at motion fairs, and both are legitimate. They simply answer different questions, and confusing the two is the most common sourcing error made on a show floor.
What each one is good at
A manufacturer can answer a design question, change a clearance, run a special batch and explain a heat-treatment choice, because they own the process. A trader can consolidate many families into one shipment, carry stock across brands and handle the paperwork, because they own the relationship instead. Neither is automatically better; the mistake is asking a trader for a design answer or asking a manufacturer for a mixed-brand consolidated delivery.
The practical rule is to place a manufacturer on the lines where the specification is hard to hold, and a trader on the lines where the value is in breadth, stock and logistics. Both should be able to name the other's role honestly. A supplier who claims to be a manufacturer and cannot describe a grinding line or a heat-treatment furnace is telling you something useful by omission.
How to follow up after the fair
The follow-up is where the fair either pays for itself or does not. A business card in a pocket is worth nothing; a request for quotation with real data is worth a qualification cycle.
Send data, not a greeting
Within a week, send the supplier a short RFQ that includes the dimensions, the quantity, the duty, the tolerance class, the clearance and the lubrication you need, plus a reference to what was discussed at the stand. A supplier who can respond to that with a drawing and a quotation has already passed the first test. A supplier who replies with a generic catalogue and no numbers has told you where they sit.
- Reference the conversation. Name the contact and the product family you discussed, so the engineer rather than the receptionist gets the message.
- State the specification. Dimensions, tolerance class, clearance, cage, seal and grease, with the standard each is defined by.
- Ask for a sample plus protocol. A sample without a stated test method proves only that the supplier can post a box.
- Set a review date. A follow-up with a date attached converts into a sample order; one without a date converts into nothing.
Step-by-step: turn a fair visit into a qualified supplier
The sequence below is the one we recommend to buyers who use a show as the front end of a sourcing project rather than as a day out.
- Define the positions. List each open bearing position with its dimensions, load, speed and tolerance class.
- Group by family. Group the positions by product family so that one stand conversation maps to several lines of your list.
- Filter the exhibitor list. Keep only suppliers whose declared range covers your families.
- Book and brief. Book short meetings and state the size and the question in advance.
- Interrogate at the stand. Ask the clearance, cage, measurement and traceability questions and collect written answers.
- Classify the contact. Record whether each supplier is a manufacturer, a trader, or both.
- Issue a data-based RFQ. Follow up within a week with a specification, not a greeting.
- Order samples. Ask for a sample and a test protocol tied to the specification you sent.
- Measure on receipt. Check the sample against ISO 492 and your own fit requirements before you judge the supplier.
- Trial and repeat. Place a small repeat order and review performance before adding the supplier to your approved list.
The practical limits of a trade fair
A fair is a reconnaissance tool, not a qualification. Nothing you see on a stand, however convincing, replaces a sample measured on your own bench, a dimensional report checked against your drawing, and a repeat order that proves the first good lot was not a hand-picked one.
Treat the show as the point at which a name becomes a candidate, and use it to cut the long list to a short one you can afford to sample and audit properly. The interchange lookup is where a candidate's part numbers become comparable to what you already run, the brand directory shows the ranges we already stock, from SKF to our own ANDGE line, and our contact desk is where a shortlist turns into a sample request. Buyers who plan the show around those three steps get a supplier; buyers who plan it around the floor plan get a carrier bag.
Frequently asked questions
Why should a bearing buyer visit a motion engineering trade fair?
A motion fair compresses weeks of supplier reconnaissance into two days. You can compare several manufacturers of the same product family face to face, ask design questions, and read the exhibitor list as a map of which regions are active in which family. It is a fast way to build a candidate list, but it is not a qualification.
What should I prepare before a bearing trade fair?
Start from your bill of materials, group every open position by product family, and record the dimensions, load, speed and tolerance class for each. Filter the exhibitor list against that target list, book short meetings with a stated topic, and print a pack containing a drawing, a specification list and a sample request you can hand over.
What is the difference between a manufacturer and a trader at a bearing fair?
A manufacturer owns the process and can change a clearance, run a special batch or explain a heat-treatment choice. A trader owns the relationship and can consolidate families, carry stock across brands and handle paperwork. Both are legitimate. The error is asking a trader for a design answer or a manufacturer for mixed-brand consolidation.
What questions should I ask at a bearing supplier's stand?
Ask about the internal clearance class and the recommended shaft and housing fits, the cage material, the tolerance class, and the grease fill. Then ask for evidence: a dimensional report for a real lot, traceability back to the steel lot, and a sample with a stated test protocol. Written answers are themselves evidence of process control.
How do I follow up after meeting a bearing supplier at a fair?
Send a short RFQ within a week that names the contact and the product family, and states the dimensions, quantity, duty, tolerance class, clearance and lubrication. Ask for a drawing, a quotation and a sample with a test protocol, and set a review date. A supplier who replies with real numbers has passed the first test.
Can a trade fair replace a supplier audit?
No. A fair shows you a presentation; qualification requires evidence. You still need a sample measured against your drawing, a dimensional report checked to the relevant tolerance standard, and a repeat order that shows the first good lot was reproducible. Use the fair to build a shortlist, then audit and sample the candidates that survive it.