How does a rotary table shot blasting machine work?

A rotary table shot blasting machine is a closed cabin with a horizontal rotating table and the blast wheel mounted above it. It is an airless machine: the wheel throws media by centrifugal force, with no compressed air and no nozzle. Rotation brings every part through the direct flow, and each part also sits inside the rebound, so media bouncing off the cabin liners and off the parts reaches every exposed face. Every face except the one in contact with the table, which never sees media. The cycle is automatic; loading and unloading are the manual part and can be automated.

What sizes and load capacities are available?

Four standard sizes. Size 5: Ø500 x H450 mm, 500 kg (Ø20 x H18 inches, 1100 lbs). Size 10: Ø1000 x H450 mm, 1000 kg (Ø40 x H18 inches, 2200 lbs). Size 14: Ø1400 x H450 mm, 1400 kg (Ø55 x H18 inches, 3100 lbs). Size 18: Ø1800 x H450 mm, 1800 kg (Ø71 x H18 inches, 4000 lbs). These are the real workable envelope, not the physical table diameter. Working height is 450 mm as standard and can be modified according to the parts to process.

How do I choose the right table blaster size?

Four steps. First, make sure your biggest part fits inside leaving about 20% of room, because that margin is what gives optimum media coverage. Second, measure how long it takes to load parts in and out: that timing is what limits your production capacity, not the cycle time, so focus there. Third, check the equipment fits in your shop or production line — it can usually be shortened if needed, but remember you need walkable space around the machine for maintenance and safety. Fourth, accept that you will have to compromise anyway: list your wishes, then compromise where needed. The right upgrade, a fixture or a cart, can solve plenty of issues for a little extra paid upfront.

Which parts is this layout best suited to?

It works best on 2D parts, where length and width dominate and height stays modest. Simple extrusion dies are the clearest example: flat, one face to clean, nothing to take apart. Springs are another, for descaling after heat treatment or for shot peening, both on classic coil springs and on the flat springs used in automatic transmissions. Other common work includes glass mold cleaning, tire mold cleaning, post heat treatment descaling and casting deburring.

What are the limits of a single blast wheel rotary table machine?

The side of the part facing the table is not blasted and needs flipping, which adds cycle time. Complex geometries may need more than one blast wheel to reach full coverage. Parts occupying 80 percent or more of the available workable envelope need a coverage analysis, because that is where blind spots appear in the blast pattern. Satellite fixtures and drum configurations are available where the parts justify them.

What control system does it use and can it be integrated into a line?

Siemens as standard for CPU, HMI and drives, with an Allen Bradley version available. The control system handles automatic media gate control and one-button recall of pre-programmed blasting and peening setups, so operators switch process without entering parameters manually. Load and unload automation is available in several configurations where the volume justifies it. The dust collector is a built-in unit sized on the cabin, configured to ATEX or NFPA 660 depending on the destination market.

What are satellite fixtures on a rotary table shot blasting machine?

Satellite fixtures — planetary tables outside the US, the same thing under two names — are the typical upgrade. Plates on the main table each turn on their own axis while the table turns, and the wheel fires from one fixed point, so the impact angle changes continuously instead of repeating the same sweep.

Do satellite fixtures make the cycle faster?

On blast time yes, on production less than you will be told. Five minutes of blasting comes down to three: 40 percent. Add the operator, about five minutes to unload and reload a 1000 mm table, and the full cycle goes from ten to eight: 20 percent. Part-specific plates cost a minute more on loading, so nine against ten: 10 percent. If you are buying satellites for throughput, the honest figure is the last one.

How uniform is the coverage with satellite fixtures?

Uniform enough to hold a specified peening intensity, and it works the same way in finishing. On a trial for the supplier of a car manufacturer, on flat springs for automatic transmissions, the Almen readings across a 20-piece sample were so consistent that the repeatability was questioned and the residual stress X-ray was recalibrated before anyone accepted them. It is a consistency argument, not a throughput one, and consistency is what gets specified.

What do satellite fixtures take away?

Usable surface, table capacity and flexibility. Of a physical table taken as 100, about 80 is workable, because the edge is never properly covered and shadows take the rest; fit satellites and about 50 is left. A table rated 1000 kg carrying 300 kg of spider leaves 700 kg of parts, though uprated tables are available. And a plate built around one part runs that part and nothing else.

Why does a satellite table need an odd number of satellites?

Because the spider must not be symmetrical. The wheel fires from one fixed point: when the gap between two satellites passes under the blast, a symmetrical arrangement shows a gap on the opposite side at the same moment, and the media reaching across finds nothing. An odd count always leaves something on the far side to catch it. Satellites also raise the plane where parts meet the blast, so the wheel aim has to be corrected.

What does a satellite spider cost to own?

The frame is manganese steel and lives under the blast every cycle, so treat it as consumable — not on a short interval, but it will need work. Maintenance means welding with filler metal done properly, or the repair will not last. Be equipped in house, find someone who is, or keep a spare. They are made to specification, so not cheap. Write into the purchase contract that the executive drawings of the fixtures come with the machine: later, with the builder on another continent, what hurts is not the price but getting one.

Can loading the whole satellite assembly recover the lost time?

Partly. Work on a spider outside while the machine runs and swap it when it stops: five minutes becomes four, three at best. Then the part no trial run shows you — the operator does it for eight hours, handling 100 to 300 kg, easily unbalanced, with parts secured but not firmly because they must stay exposed to the media. Three minutes held across every shift is more ideal than real. Automated handling is what changes it.

When are satellite fixtures worth the money?

Start from the technical requirement, not the price. Three questions: uniformity or surface delicacy problems, parts extremely consistent in size and weight, a part-specific poka-yoke plate that would help the process. Three yes and they are seriously worth evaluating, the first weighing most because the changing angle is what stops the blast insisting on the same points. A fourth question misleads: needing more production capacity is not what satellites deliver. Only then price: machine X, satellites 10 to 15 percent of X, with poka-yoke plates 20 to 30 percent, inside an automated loading system around 2X.

TAB: Rotary Table Shot Blasting Machine — Single Blast Wheel

Q: What blast wheel and media flow rate does it use?

The standard blast wheel is a 5.5 kW (7.5 hp) direct drive unit, upgradable to 11 kW (15 hp). Media flow rate runs from 90 to 140 kg/min (200 to 310 lbs/min). Compatible media: steel shot, stainless steel shot and derivatives below 50 HRC, aluminium shot, cast iron grit and steel grit. Above 50 HRC a carbide kit is worth having. Ceramic media runs with its own dedicated kit.

Silvio Ruiu

Feb 24

10 min read

Updated: Oct 23

A rotary table shot blasting machine is a closed airless cabin with a horizontal rotating table and a single blast wheel mounted on top; it works on batch and by cycle time, in manufacturing plants where parts come in quantity.

Parts are laid flat on the table, the table turns them through the direct media flow, while the rest of the time rebounding media keeps the process going.

One face never gets treated in one single cycle: the one resting on the table.

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What a table blast machine does well in manufacturing

A table blast machine works best on 2D parts — length and width dominate, height stays modest. Simple extrusion dies are the clearest example: flat, one face to clean, nothing to take apart. Springs are another: descaling after heat treatment or shot peening, both on classic coil springs and on the flat springs used in automatic transmissions.

Huge plus: the operator has direct access to the cabin, so in principle it gets inspected every cycle. Load and unload can be automated in several ways where the volume justifies it.

Technical 3D preview of TAB based on CM T10 - Request full footprint for plant layout — **TAB 3d sample drawing** - *footprint available upon request accordingly with the size requested.*

Where turntable shot blasting machines are used:

Glass industry — mold cleaning
Aluminium extrusion — die maintenance
Tire manufacturing — mold cleaning
Post heat treatment descaling
Casting industry deburring
Shot Peening

...and a long list of others. If your part/process is not here, ask.

Table type shot blasting machine: sizes and capacity.

Workable Dimension (mm)	Max Load (kgs)	Size Equipment	Max Load (LBS)	Workable Dimension (inches)
Ø 500 x H 450	500	5	1100	Ø 20 x H 18
Ø 1000 x H 450	1000	10	2200	Ø 40 x H 18
Ø 1400 x H 450	1400	14	3100	Ø 55 x H 18
Ø 1800 x H 450	1800	18	4000	Ø 71 x H 18

TAB size 10 workable specs and media pattern based on CM T10 layout.

How a rotary table shot blasting machine works

A rotary table shot blasting machine — also sold as table type shot blasting machine or turntable shot blasting machine — is a closed cabin with a horizontal rotating table and the blast wheel mounted on top, aimed so the jet covers the parts laid on the table.

Overview about how the machine works and deep dive on the main components here, while the batch equipment spectrum is here.

How to choose your table blaster size in 4 steps

Make sure your biggest part fits inside, leaving about 20% of room for optimum media coverage.
Measure how long it takes to load parts in and out; this timing is what limits your production capacity, not the cycle time — focus here.
Make sure the equipment fits in your shop or production line, if needed it can be usually shortened; remember for maintenance and safety you need walkable space around the machine itself.
You will have to compromise anyway, so list your wishes then compromise where needed, the right upgrade like a fixture or a cart can solve plenty of issues with a little extra to pay upfront.

Existing equipment, buy new or refurbish?

On a table machine the technical answer is easy to reach. Forget the accessories for a moment — filter, elevator, the blast wheel itself — and look at the cabin alone.

Case A. The cabin is still square, confirmed by the doors closing properly, and the table runs well.
Case B. The cabin is out of square and the table runs badly. Seals cost nothing: change them first, and if media still escapes it is not the seals, the fit is gone.

In case A it is worth having a look to see what needs doing, build the shopping list and check the total amount; in case B forget it, the machine has to be changed.

Satellite / planetary table fixtures

Satellite fixtures — planetary tables, outside the US — are the typical upgrade on a rotary table machine. They are also the one most often bought for the wrong reason.

How satellite fixtures change the impact angle

On a plain table the part lies still while the table carries it through the blast. Fit satellites and each plate turns on its own axis while the main table turns. The blast wheel does not move: it fires from one fixed point. So the angle at which the media hits the part changes continuously, instead of repeating the same sweep every revolution.

Shot peening springs on planetary system and how it all works.

That single change is the whole story. Everything below — what you gain and what you give up — comes out of it.

Satellite cycle time in a rotary blaster: 40%, 20%, 10%

The number you will be quoted is the first one. A cycle that runs 5 minutes on a plain table typically comes down to 3 with satellites. That is 40% off the blast time, and it is real.

Then put the operator back in. On a 1000 mm (3 ft) table, unloading and reloading takes about 5 minutes with an average operator. The full cycle was 10 minutes, now it is 8. The gain is 20%, not 40%.

Then make the plates part-specific, which is where satellites do their best work. Loading gets slower — unloading does not change, but placing parts into shaped seats costs about a minute. Six minutes of handling plus three of blasting is nine. Against the original ten, you are at 10%.

Forty, twenty, ten. None of them is wrong, they answer three different questions. If you are buying satellites for throughput, the honest figure is the last one.

What you actually buy with planetary: coverage uniformity and repeatability

Start from the process, not from the machine. What the changing impact angle buys is uniformity of coverage, and it buys it the same way in finishing as in peening. Same phenomenon, nothing different to learn.

How uniform: years ago I ran a trial for the supplier of a car manufacturer, on a table machine fitted with satellites. The parts were flat springs for automatic transmissions. Working to a given peening intensity specification, the results measured on Almen strips came back so consistent across a 20-piece sample that the repeatability itself was called into question — the parent company, which held the X-ray equipment for residual stress, called a technician in to recalibrate it. Our customer then asked for a second sampling run half an Almen higher, to show the car maker a margin.

That is what a well calibrated table machine with satellites does. It is not a throughput argument. It is a consistency argument, and consistency is what gets specified.

Dedicated plates: the part-specific fixture

When the parts are always the same, the plate itself can be built around the part. At that point the fixture stops being a holder and becomes part of the process: the part only goes in one way, so it cannot be loaded wrong. That is poka-yoke, built in steel.

The price is flexibility, and the price is all of it. A plate shaped for one part runs that part. Anything else goes back on the flat table, or waits for another fixture.

And it costs the minute of loading counted above.

What satellites take away: usable surface and table capacity

On a table machine what you are buying is available surface, and it is smaller than the table.

Take the physical table as 100. The workable surface is about 80: the edge is never properly covered, from the throw to the end of the pattern, and shadows take the rest. This holds for a single wheel machine, which is 80 to 90% of what is installed; a second wheel on top changes the picture somewhat.

Fit satellites and you are left with about 50, if it goes well. Whether that matters depends on the parts. It is not a defect, it is an arithmetic to do before signing.

The same applies to weight. The table comes rated, and almost every manufacturer offers an uprated table on request. A table rated 1000 kg (2200 lbs) carrying 300 kg (660 lbs) of satellite spider leaves you 700 kg of parts. The satellites themselves are rated too, and they can be built heavier. All of it moves the price.

Fitting them right: odd numbers and wheel aim

Two things decide whether a satellite set works or wastes media.

Use an odd number of satellites — put differently, the spider must not be symmetrical. The wheel fires from one fixed point towards the table. As the spider turns, the gap between one satellite and the next passes under the blast; if the arrangement is symmetrical, the position diametrically opposite is showing a gap at the same moment, and the media that reaches across finds nothing. With an odd count there is always something on the far side to catch it.

Second, satellites raise the plane where the parts meet the blast. The wheel aim has to be corrected for the new height, or you are treating the air above the parts.

The satellite spider is a consumable: spares, repair and the drawings

The frame carrying the satellites, built properly, is manganese steel, and it is not light. It lives under the blast for every cycle the machine runs. Depending on the media, treat it as consumable material — not on a short interval, but it will need work.

Maintenance here means welding with filler metal, and it has to be done well: a poor repair does not last under blast. Either you are equipped to do it in house, or you find someone who is, or you keep a spare spider on the shelf. These are made to specification, so they are not cheap, and the usual reaction is to look at the object and wonder what justifies the price. Wrong question. The question is what it does for the process and whether you need it.

Which brings up the one thing to settle before you sign. Manufacturers are, understandably, protective of their drawings and build specifications. Purchase is the moment to write into the contract that the executive drawings of the fixtures come with the machine. Later, especially if the builder is on another continent, what hurts is not the price of the spider but the logistics of getting one — on an item that is, in the end, a consumable.

Loading the whole fixture, and what happens over eight hours

There is a way to get some of the lost time back. Instead of loading parts one by one inside the machine, load and unload the whole satellite assembly: while the machine runs you work on the spider outside, and when it stops you swap it.

It helps. It does not transform anything. The assembly is large and awkward, and if a person is still doing it by hand, five minutes becomes four, three at best.

Then there is the part no trial run shows you. The operator does this for eight hours, not three times for a stopwatch. He is handling 100 to 300 kg (220 to 660 lbs), easily unbalanced, with parts on it that are secured — but not firmly, because they have to stay exposed to the media. Three minutes, held across a shift and every shift after, is a number that is more ideal than real. That is my experience, not a specification.

What genuinely changes the picture is automated handling: a robot, or a system that loads and unloads without a person carrying anything. Then the three minutes hold, and the 40% you were quoted at the start begins to appear.

Satellites in a rotary table blasting machine: yes or no

The question is not what the fixture costs. It is what the process requires. There are several boundary conditions and two or three of them decide the matter.

Uniformity or surface delicacy problems? Yes / No
Parts extremely consistent in size and weight? Yes / No
A part-specific poka-yoke plate would help the process? Yes / No

The first one comes first for a reason: the changing impact angle is precisely what stops the blast insisting on the same points, cycle after cycle. If that is your problem, satellites address it directly.

Three yes, and satellites are seriously worth evaluating, prabably a good go.

Then there is a fourth question, and it is the one that sends people down the wrong road. Do you need to increase production capacity? If that is the reason you are looking at satellites, this is not how you get there. Read the forty, twenty, ten again.

Only once the technical answers point to yes does the price become the subject:

the table machine itself: X

satellites: 10 to 15% of X

satellites with part-specific poka-yoke plates: closer to 20 or 30%

the same machine inside an automated loading system: around 2X

Every case stands on its own and has to be analysed properly.

Table blaster: coverage and technical details

Workable dimensions. These are the real workable envelope, not the physical table diameter. See the blast pattern drawing. If parts occupy 80% or more of the space available, a coverage analysis is needed — that is where blind spots appear.

Working height. 450 mm (18 inches) as standard on all sizes. Working height can be modified according to the parts to process — a size 10 built at 750 mm for extrusion dies is shown below.

Coverage. The side facing the table needs flipping. Complex geometries may need more than one blast wheel, which is established by coverage analysis before the layout is fixed.

Blast wheel. 5.5 kW (7.5 hp) direct drive as standard, up to 11 kW (15 hp). Media flow rate from 90 to 140 kg/min (200 to 310 lbs/min).

Media. Steel shot, stainless steel shot and derivatives below 50 HRC, aluminium shot, cast iron or steel grit. Above 50 HRC a carbide kit is worth having. Ceramic media runs with its own kit.

Dust collector. Built-in unit, sized on the cabin. ATEX or NFPA 660 configuration depending on the destination market.

Automation and control. Siemens as standard for CPU, HMI and drives, Allen Bradley available. Automatic media gate control, with pre-programmed blasting and peening setups recalled by the operator on one button.

How a wheel blast machine is built, component by component: Blaster or Peener: How a Wheel Blast Machine Works.

Layout and footprint. Footprint drawings for plant layout are issued on request, 2D/3D and DWG. Downloadable tech specs:

Comparing quotations on a table shot blasting machine

Assuming the machine fits your plant and holds your parts, the first thing to compare is the cabin itself. The wider cabin wins on usable space: if one day something bigger has to go in, it goes in. How much bigger is worth paying for is a judgement, but the direction is clear.

Read the table load rating the same way. More weight capacity is always better than less. Paying a little more here buys future versatility, and that can turn out to matter a great deal.

Everything else — footprint in height, running costs, control panel, software backups, filter sizing, service contracts — is common to any wheel blast machine and can be discussed separately.

If you have two or three quotations on the table and want a hand reading them, get in touch through the contact page, or if you simply need more information.

All dimensions and information here stated are for informative purposes only and subject to change without notice. Please refer to drawings and specs attached to your own quote.

Sample of standard machine with customized height - 750mm.

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