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Parts Finishing, Vibratory Finishing Equipment

LR-SERIES VIBRATORY BOWLS

Extended Processing Time. Improved Part Flow. Proven Performance.

The ALMCO LR Series combines the proven reliability of the OR platform with an extended long-radius bowl design engineered for continuous processing applications. Available in 5, 9, and 16 cubic foot capacities, these machines provide increased dwell time, smoother part flow, and improved handling of longer components while maintaining the durability and finishing performance manufacturers have trusted for decades.

Unlike standard OR-Series bowls, every LR Series machine includes a standard internal media and part separation system, making them ideal for continuous “once-around-and-out” processing operations. The extended bowl geometry also helps reduce bridging, wedging, and part hang-ups, making the LR Series an excellent choice for difficult, elongated, and high-value components.

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MODEL COMPARISON

COMPARE AVAILABLE MODELS

OR-5VLR Vibratory Bowl
OR-5VLR Vibratory Bowl

OR-5VLR Vibratory Bowl

Compact long-radius bowl providing extended dwell time and integrated media separation.

  • Standard internal separation system
  • Longer processing path
  • Improved handling of longer parts
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OR-5VLR Vibratory Bowl
OR-9VLR Vibratory Bowl

OR-9VLR Vibratory Bowl

Versatile long-radius finishing system combining increased throughput with enhanced process control.

  • Extended dwell time
  • Improved part flow characteristics
  • Ideal for continuous processing applications
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OR-16VLR Vibratory Bowl
OR-16VLR Vibratory Bowl

OR-16VLR Vibratory Bowl

High-capacity long-radius bowl engineered for maximum throughput and continuous production.

  • 16 ft³ capacity
  • Standard internal separation
  • Designed for larger and longer components
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Why Choose the OR Series?

  • Proven Performance – A time-tested bowl design trusted by manufacturers for generations.
  • Flexible Part Handling – Optional dividers allow multiple parts or part families to be processed while minimizing part-on-part contact.
  • External Separation Capability – Ideal for applications requiring specialized media separation or difficult part geometries.
  • Multiple Sizes Available – Choose from 3, 5, or 10 cubic feet of capacity to match your throughput requirements.

COMMON APPLICATIONS

  • High-volume production environments
  • Large batch processing
  • Automotive and transportation components
  • Machined, stamped, cast, and forged parts
  • Applications requiring part separation during processing

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LR Series Model Comparison

Spec OR-5VLR OR-9VLR OR-16VLR
Working Capacity 4.2 7.6 15.2
Motor Size 3 5 10
Overall Dimensions (In) 54 x 54 x 36 80 x 66 x 44 96 x 84 x 50
Channel Cross Section 8.25″ 10″ 12.5″
Power Consumption at 480v, 3 Phase (amps) 3.75 6.25 12.5
Ceramic Media Required (lbs) 399 722 1444
Steel Media Required (lbs) 1260 2280 4560
Plastic Media Required (lbs) 273 494 988
Maximum Part Size 5″ Diameter 7″ Diameter 9″ Diameter

SYSTEM DETAILS

LR Separation

Internal Separation

The standard internal separation system makes it easy to unload parts from the machine. This can either be in a continuous mode where the parts are constantly making their way over the screen deck after one rotation around the bowl, or the dam can raise once the process is complete.

The LR series comes with a manually operated dam in its standard configuration. This can be upgraded to a pneumatic system operated at the control panel for an additional cost. With PLC integration options available, the process is capable of full automation and integration with other ALMCO systems like washer and drying units.

LR Lined Bowl

LR Lined Bowl

Urethane Lined Process Bowl

The machine’s processing bowl consists of a weldment fabricated from two spun-metal sections and a rigid vibrator mounting plate. The bowl rests on machine base springs, and during operation these springs allow the bowl to rapidly “wobble” as the center-mounted vibrator spins. This vibrating action of the bowl imparts energy to the process parts and abrasive media within the bowl, causing the parts to be deburred by the media.

The 5 cubic foot processing bowl (or “tub”) is a gusseted, circular weldment. The interior of the bowl weldment has a U-shaped cross section that is lined throughout with 3/8″ thick cast polyurethane to provide a smooth interior with no seams, crevices or ridges for parts to hang up within the bowl.

OR Spray System

OR Spray System

Spray System

The machine is equipped with a spray system designed to inject water (and/or liquid compound) into the processing bowl to keep the finishing media clean and free cutting by flushing fines and other contaminants out of the bowl through a perforated (replaceable) molded drain plate in the bottom of the bowl.

LR-How it Works

LR-How it Works

How it Works

The vibrating motion of the machine’s spring-mounted processing bowl is generated by the bowl vibrator assembly. This unit consists of a vertical shaft having a counterweight mounted on each end, with the shaft turning in a pair of spherical roller bearings pressed into precision-machined housings. The vibrator assembly is bolted to the bowl such that the vertical shaft runs down through the hollow center of the bowl, extending beneath the bowl within the machine base.

In operation, the out-of-phase counterweights on the spinning vibrator shaft create an imbalance that causes the spring-mounted processing bowl to rapidly “wobble” on its springs. This vibrating action in turn causes the mass of parts and media within the bowl to vibrate, roll, and progress around the bowl in an orderly fashion. The “action” (roll and progression) of parts and media within the bowl can be controlled by adjusting the speed of the vibrator shaft, changing the amount of upper and/or lower counterweight, and also by changing the angular relation between the upper and lower counterweights.

Drive Unit

The vibrator assembly is driven by a 3 HP, 1800 RPM TEFC electric motor powered by an AC variable frequency drive. The motor mounts to the machine base, and the drive sheave on the motor is connected by V-belt to a companion sheave on the vibrator assembly. Frequency of vibration is variable and can be adjusted between from 800 to 1400 cycles per minute by turning a potentiometer dial located on the main electrical enclosure.

OR Control Panel

OR Control Panel

Electrical Controls

Electrical controls are housed in a free-standing enclosure. Components within the enclosure are finger-safe and are Allen-Bradley brand unless noted otherwise. Components include a main disconnect switch, fuse holders and branch circuit fuses (as needed), Panduit wireways, terminal strips, a G.E. 115 Volt control circuit transformer, master control relay, and a PowerFlex variable frequency drive.

All other process control pushbuttons and indicating lights are mounted on the front door of the main electrical enclosure. Buttons and lights are Allen-Bradley brand. The machine is wired in accordance with NEC (NFPA 70) and NFPA 79 standards, ready for connection to your electrical service.

Machine Base

  • The machine base is a cylindrical weldment fabricated of a rigid 3/16″ thick rolled steel. The top of the base includes a flat ring-shaped plate used to mount six coil-wound springs that support the machine’s processing bowl. The bottom of the base includes a motor mount and four floor pads used to secure the machine in place. A hinged inspection door provides access to the bowl drive and to the lower portion of the vibrator assembly.

OPTIONS & UPGRADES

OPTIONS & UPGRADES

OR Sound Hood

Sound Hood

The integrated sound hood helps reduce the noise level of the machine. The metal revolving door and frame are lined with acoustic foam to dampen vibration noise.

OR Spray System

Compound Dosing

ALMCO offers flexible options for delivering compound to your process. These include both machine and wall mounted systems.

Automated Part Separation

With flexible screening options and PLC control packages unloading the machine can become totally automated to fit your production.

Water Recycling

Depending on your application, ALMCO offers a variety of solutions to treat the waste water generated during the tumbling process.

FREQUENTLY ASKED QUESTIONS

What makes the OR Series different from the AB, SBB and LR Series?

Compared with the AB, LR or SBB series bowls, the processing channel of OR Series bowls is level around the entire diameter creating the ability for dividers and consistent finishing during the process.

The large bottom discharge chute allows for the use of external separation units instead of having it built in to the bowl itself.

What machine size do I need?

Machine size depends on:

  • Part dimensions
  • Batch volume
  • Daily production requirements
  • Required cycle time

ALMCO technicians will help you calculate capacity based on part volume, media-to-part ratio, and desired throughput.

What finish can I achieve?

Typical finishing objectives include:

  • Deburring
  • Surface smoothing
  • Edge radiusing
  • Satin finishing
  • Bright polishing
  • Burnishing
  • Pre-paint or pre-plating preparation

The final finish depends on the machine, media, compound, and cycle time.

Which media should I use?

Common media options include:

  • Ceramic media – aggressive deburring and polishing
  • Plastic media – suitable for softer metals and delicate parts
  • Steel media – burnishing and bright finishing
  • Organic media (corn cob, walnut shell) – drying and final polishing

Media selection is one of the most important factors affecting performance and finish quality. ALMCO technicians will help you determine the best media for your application.

Can one machine handle multiple part types?

Yes, you can utilize different media and parts in the same bowl. Different parts and materials may require different size and shaped media depending on their outside geometry. If the same media works for multiple size components then you can run them consecutively.

Does it come with sound-dampening features?

The sound level is highly dependent on the type of tumbling media and the parts running in the tub. ALMCO offers an integrated acoustic sound lid to help dampen the noise. Some customers choose to build an insulated room around the tub to further eliminate sound.

What operating costs should I expect?

Cost of ownership includes

  • Replenishing the media as it wears down in size
  • Cleaning compounds
  • Water consumption
  • Electricity to run the machine motors depending on the amperage
  • Maintenance and spare parts

Media consumption and compound usage often represent the largest recurring expenses.

Is automatic separation available?

A key feature of vibratory bowls is their ability for internal separation. The SBB-8s spiral bottom design allows media and parts to flow easily around the processing channel and up to the separation screen deck when a gate is engaged.

The SBB line can be equipped with:

  • Pneumatic gate
  • A gate clearing sequence that runs the machine in reverse
  • Automated timers and automatic speed adjustment to slow down the process as parts leave the machine.

These features reduce labor and improve production efficiency.

Should I choose a vibratory bowl or a vibratory tub?

Vibratory bowls are best for:
• Parts smaller than six inches in diameter
• High-volume batch production
• Automatic media separation
A vibratory tub is usually preferred for:
• Long parts
• Larger parts that require separation using dividers
• Heavy components
• Parts that could become damaged in a bowl’s circular action

What are the questions I need to answer before buying an ALMCO machine?

  1. What is my daily production volume?
  2. What finish do I need?
  3. What are my part dimensions and material?
  4. Which media will be required?
  5. Do I need wet or dry processing?
  6. Do I need automatic separation?
  7. What is my budget for both equipment and consumables?
  8. How much floor space is available?
  9. What level of automation do I require?
  10. What ROI or throughput improvement am I expecting?

These are the questions most industrial buyers ask when evaluating ALMCO vibratory bowl and other finishing equipment.

What cycle time should I expect?

Cycle times are dependent on:

  • The surface hardness of the material
  • Starting surface roughness of the part
  • Burr type
  • Surface finish requirements
  • Media type

Some cleaning applications or very light edge break may be accomplishing in one pass through the bowl. Heavy deburring or polishing applications can require several hours.

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