What sizes are available in the TMB tumble blaster range and what are their capacities?

The TMB range offers four sizes. TMB 500: 27 litres / 65kg / 1 cubic foot. TMB 650: 52 litres / 120kg / 1.8 cubic feet. TMB 900: 125 litres / 300kg / 4.4 cubic feet. TMB 1000: 250 litres / 600kg / 8.8 cubic feet — this size requires two blastwheels to ensure adequate media coverage across the larger belt area. All sizes share the same rubber belt tumbling principle; the size 500 is the most compact and includes all operating components built in.

What is the shape factor analysis and why is it mandatory for TMB tumble blasting?

Shape factor analysis evaluates whether parts can tumble freely on the rubber belt without nesting into each other, floating above the belt surface, or being carried along without tumbling. Parts that nest block each other from media exposure; parts that float receive inconsistent treatment; parts that are carried rather than tumbled wear unevenly. The belt must be covered by parts during blasting to protect the rubber surface. Each application requires an engineering analysis before specifying the TMB configuration — the shape factor outcome determines whether the TMB is the correct layout and what belt speed and load parameters apply.

What is the difference between a jointed belt and a seamless belt on the TMB?

The jointed belt is constructed from rubber with a mechanical joint connecting the ends — the lower-cost option with a service life of approximately 2,000 hours. The seamless belt is built as a heavy-duty continuous rubber tire with multiple fabric reinforcement layers, eliminating the joint weakness — significantly more expensive but lasting approximately 5,000 hours. Belt replacement is a critical maintenance task, particularly on larger sizes where it can require up to four days of downtime. Specifying the correct belt type at commissioning based on production volume and part type is an important TCO decision.

What blastwheel specifications are available on the TMB and what media flow do they deliver?

The standard installation is a 5.5kW Direct Drive blastwheel delivering approximately 90kg of media per minute. This can be upgraded to 11kW, increasing media flow to approximately 140kg per minute. The upper limit of media flow is constrained by the belt's drainage capacity — determined by the hole diameter and number of holes in the belt. Exceeding the belt's drainage rate causes media accumulation that disrupts part tumbling. The TMB 1000 uses two blastwheels to provide adequate coverage across the larger belt area.

What throughput is achievable with a TMB 500 equipped with load/unload automation?

The TMB 500, despite being the smallest and most compact unit in the range, can process more than 500kg of steel parts per hour when equipped with load and unload automation. At the TMB 1000 size with full workstation automation, throughput exceeds 2 tons per hour. Without automation, the load and unload cycle becomes the production bottleneck regardless of blast cycle speed — automation investment is therefore essential to realize the full throughput potential of the equipment, and becomes mandatory on larger sizes to meet ergonomics and safety regulations.

What applications is the TMB tumble blaster most commonly used for?

The TMB is used for bulk production of: 3D printing part finishing and de-powdering, fasteners, fittings and connectors, sintered parts, shot peening of small bulk components, aluminum casting cleaning, steel casting cleaning, forging descaling, descaling after heat treatment, and aluminum can slugs processing. The common characteristic across all applications is high-volume bulk processing of parts that can tumble freely — the TMB converts what would otherwise be a labor-intensive manual or semi-automated operation into a controlled, repeatable industrial process.

TMB - Tumble Blaster - Rubber Belt.

Silvio Ruiu
Feb 27
3 min read

Updated: 3 days ago

TMB Layout features.

The TMB range combines the mechanical tumbling action on a continuous rubber belt with a high-velocity abrasive stream from top-mounted blastwheel(s). This design is ideal for bulk-load processing, though an engineering analysis is essential to evaluate the "shape factor" and ensure parts can tumble freely without nesting or floating; productivity can be really massive if the load/unload part of the process is engineered for it. The belt MUST be covered by the parts while blasting.

Get support on this model/type blaster.

TMB 500 layout drawing 27liters 52kgs capacity — TMB 500 sample drawing - *footprint available upon request accordingly with the size requested.*

Features:

Volume	Capacity	Size	Capacity	Volume
27ltrs	65kgs	500	143lbs.	1 cubic feet
52ltrs	120kgs	650	265lbs	1.8 cubic feet
125ltrs	300kgs	900	661lbs	4.4 cubic feet
250ltrs	600kgs	1000 (2 blastwheels)	1,323lbs	8.8 cubic feet

Main Key Technical Notes:

Working features: shown below is the 500, with the media pattern as well; increasing the size of the cabin adopting 2 blastwheels became mandatory ⬇️:
This "small" unit if equipped with load/unload automation is capable of more than 500kgs (of steel parts) per hour, as the size increase production follows; to ensure an adequate dimensioning of all the items involved a proper analysis is a must, each application is different. The video in the end clarify better than words about a fully equipped workstation capable of more than 2 tons per hour, while here with the gif it's possible to see the parts moved by the belt:
Belt: it is the most important item of the cabin and must be designed accordingly with the media size to guarantee its drain and to not to stop or stuck of the parts motion. It may be built from a rubber belt with a joint (the poorest) or like an heavy duty rubber tire seamless with several layers of fabric to improve the strength; second one is an expensive spare part and it last about twice than the first one; replacing belt is a critical task specially with the bigger size, can take up to 4 days before getting it done. To give numbers a belt with joint is normally lasting about 2,000 hours, while a well built semless belt can reach 5000 hours.
Blastwheel: Installed is a 5.5Kw unit direct drive, can be increased up to 11Kw; related media flow rate is from 90kgs/minute to 140kgs/minute; top limit is related to the quantity of media the belt is capable to drain, it goes with holes diameter and number of them.
Media: steel shots, stainless steel shots and derivates below 50 HRC, Aluminum shots, Grit as cast iron or steel, if hardness is above 50HRC carbide kit is beneficial; Zirblast Ceramic media with its own kit. Media kits specs are here listed as option.
Filter: built in unit according to the cabin size ATEX/NEC standards; some applications like aluminum slugs require extra care.
Automation Control: Siemens standard for CPU, HMI and drives, Allen Bradley version available; automatic media gate control to use preprogrammed blasting/peening setups by "one button" recall from operator or bar code reader.
Layout & Footprint: Detailed 2D/3D drawings and DWG footprints are available upon request.

Pros: the smaller size (500) is a compact equipment with everything needs to operate built in; ideal for "small" bulks process without the operator attending it beside load/unload and extremely cheap to run; adding automation can turn into fully automated workstation with barely a minimum human labour involved, same automation became mandatory with the bigger size to fulfill ergonomics and safety regulations when production becomes really massive.

Cons: approaching first time this layout it is highly recommended test and analysis to understand how and if the shape factor influence nesting, floating and eventual "carrying on" of the parts by the belt; the belt itself remain a critical part that is affected by aging and needs to be received in the right time window for the replacement.

Boosters: specific accessories can improve productivity, mostly the loading systems to be customized accordingly with products to process, while a vibrating channel is a great item to speed up downloading time getting the parts clean from media while it is recovered to the machine itself. Once again, a little efforts spent on designing the process would be priceless while in operations.

Popularly used in: bulk productions like 3d printing, fasteners, fittings and connectors, sinterized parts, shot peening, aluminum casting, steel casting, forging and descale after heat treatment, slugs for aluminum cans and other materials/use.

Feel free to reach if you are thinking this layout would fit your needs.

Downloadable Tech Specs TMB Blaster memo:

https://www.youtube.com/watch?v=TFoBAW-0p-c

Size 1000 tumbleblaster workstation in operations.

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

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