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TB-4 Tumble Barrel

Most applications today using directional blasting cabinets require hand-held guns for part processing but there are some parts that process better and faster using batch loads. This is the function of all tumble basket and tumble barrel models.

All Media Blast Tumble Barrels are listed as machine options. While the option can't be purchased without purchase of a machine model, this does allow the option to be added to any machine model, wet or dry, with and without pneumatic conveyor, for standard to ultra-fine abrasive.

The TB-4 is a full production Tumble Barrel Option with a square cabinet design and no manual blasting station. It can use the largest barrel size, 22" diameter, but also is available with a smaller barrel installed for short part loads. Because it's a barrel and not a basket it has the fastest random part mixing for the fastest possible cycle time only requiring a single gun inside the barrel. The TB-4 uses two variable speed drives, two 1-1/2" diameter support shafts and two 22" diameter barrels for up to 50-pound part loading or one smaller barrel for smaller short loads. This unit normally has a cycle time of 20 minutes for 50-pound part loads.

This model is commonly used to remove heat-treated scale, prepare and clean parts for centerless grinding application or surface finish parts in batch loads before assembly. It is available with two dust collector sizes depending on the basket size. Two TB-3 machines with a total of 880 sq.ft. of filter area will produce more volume than the TB-4 model. Because the part load protects the barrel during operation, the TB-4 unit will be able to extend barrel screen life when processing short or small part loads when a smaller barrel is installed.

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  • 2 each variable speed DC drives 0-29 rpm ½ H.P.
  • 2 each 22-inch diameter barrel or one smaller barrel for short loading
  • 2 each 1-1/2 inch diameter rotation shafts with bearings
  • Rotation shaft guards
  • 2 each safety door interlocks
  • 2 each 50 cfm boron carbide blast nozzles
  • Solenoid operated guns
  • Fixed gun holder assemblies
  • 2 each Jog control circuits
  • 2 each 0-60 minute solid state plug-in timers
  • Perforated metal grate overlay
  • Special flat window cabinet
  • Observation view window
  • Expanded 440 sq.ft. cartridge dust collector
  • Automatic timed pneumatic cleaning cycle
  • Single power source indicated by customer upon purchase


  • Ambient air dryer
  • Rubber dipped parts barrel
  • Barrel pop-out shield for light parts
  • Side table (s) available with height correct for jog barrel unload into customer supplied tote pans
  • Timed reverse pulse cleaning cycle upgrade
  • Maintenance hour meter
  • Timed part blow-off cycle
  • Visible end cycle indicate light
  • Can be purchased less dust collector for operation using central dust collector

NOTE: Standard Features are included with every model. Available Options can be added at additional cost and may require custom machine work, which may increase machine delivery time.

Technical Information: TB-4 Option
Option Tumble Barrel (can be added to any industrial mode, wet or dry)
Compressed Air Usage TB-4 Option: 56 cfm @ 100 psi each barrel, total 112 cfm @ 100 psi (most tumble machines operate at higher pressure because of the distance of the nozzle to the parts)
Suggested Air Compressor:

TB-4 operation requires compressed air in addition to the air usage required by the machine it's being added to. Check line pressure making sure it's 100 psi or higher for proper operation of any TB model.  Distance from the nozzle to the part requires higher than maximum impact velocity blasting pressure, and while lower pressure will work, the loss of frictional heat can increase processing time.
Air compressors vary greatly, check the cfm output on the compressor being used or visit Air Basics for more information on compressor selection.
Pro Tip: Never buy a compressor using the displacement cfm number, always use the second cfm volume number listed with 90-100 psi inside the tank, because tank pressure reduces performance.

Recommended Abrasive Size: 60 to 150 mesh for internal separator reclaimer, 80 to 240 mesh for pneumatic conveyor operated machine or external separator reclaimer
Most Used Abrasive Type Glass Beads, Aluminum Oxide and Silicon Carbide...due to distance to parts the processing pressure may be higher than maximum impact velocity
WARNING: Abrasive Restrictions and Warning
Paint Specification: Environmentally friendly, high-grade polyurethane high gloss paint. Standard colors include MBA beige and high gloss light gray. Custom color matching is available using customer supplied color sample, please call 866-204-7068 for pricing.
TB-4 Barrel
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48" x 36" x 36"H
Door 30" x 31"H
60" x 51" x 90"H 440 sq.ft. cartridge
700 cfm blower C-III
Internal Separator
Timed pneumatic cleaning cycle
Single power source
Wood crate
1600 lbs