RF-50 Centrifugal Disc Finisher: Double the Capacity, Still Compact
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The Economical Centrifugal Disc Finisher for Shops Ready to Scale Past Small-Batch Finishing
The RF-50 is the step up for manufacturers who need more centrifugal disc capacity than the RF-20, without the cost or footprint of the RF-100. At 1.5 cubic feet, it more than doubles the RF-20’s 0.7 cu ft capacity in a still-manageable footprint of 50″ x 37″ (about 13 sq ft).
Capacity isn’t the only upgrade. The RF-50’s 20″ x 15″ drum is much larger than the RF-20’s 11″ x 11.5″ tub, allowing parts up to ~6–7″ to tumble freely—sizes that would crowd or jam the RF-20. It eliminates the need to force oversized parts into smaller machines or finish them by hand.
A 2 HP motor (vs. 1 HP) powers the larger disc, maintaining consistent rotation under heavier loads. Variable frequency control provides the same flexibility as the RF-20—from gentle polishing to aggressive deburring—but sustained across larger batches.
Capacity: 1.5 cu ft
Working Capacity: 1.5 cu ft
Overall L x W x H: 50″ x 37″ x 44″
Drum Size: 20″ x 15″
Motor: 2 HP
Weight: 850 lbs
Voltage: 230v or 460v
RF-50 Operation: Bigger Drum, Same Simple Workflow
The RF-50 operates on the same centrifugal disc principle as the RF-20: a rotating disc at the bottom of an open-top drum creates a toroidal flow pattern that drives media against part surfaces at high energy. The difference is scale. The 20″ x 15″ drum holds more parts and media per batch, and the 2 HP motor sustains the disc speed under the heavier load.
Loading is manual—add media, compound, and water to the drum, set your speed and timer, then drop in your parts. The open-top design lets you add parts during operation, visually inspect the process at any point, and check surface quality without stopping the machine. This is one of the key advantages of centrifugal disc machines over centrifugal barrel finishers: you can see what’s happening and adjust in real time.
Unloading uses a dumping system: the drum tilts to separate parts from media and feeds them into a recovery bin positioned beneath the machine. The process is straightforward and doesn’t require the barrel-lid handling, cover lifts, or manual media sorting that centrifugal barrel machines involve.
The RF-50 supports both continuous-flow processing (water and compound circulate during operation) and batch processing (tub loaded, cycle completed, contents dumped). Continuous flow is preferred for most production applications because it keeps the media clean and flushes swarf away from part surfaces during the cycle.
Standard Features
- Variable Frequency Drive
- Digital Process Timer
- Polyurethane Lined
- Upflow Drain System (water is pushed up thru disc gap & drains toward top of machine)
- Finish Cycle Buzzer
- Ideal Unload Height
- Convenient Operator Control Console
- Hydraulic Disc Unload
- Variable Process Timer
- Amp Meter
- RPM Meter
RF-50 Features: What’s Included
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Feature |
Feature |
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20″ x 15″ drum—nearly double the RF-20’s working area The larger drum diameter means parts that crowded or jammed in the RF-20’s 11″ tub now tumble freely with proper media-to-part ratios. The additional depth accommodates heavier media loads for more aggressive deburring on harder materials. |
2 HP motor with variable frequency drive Double the RF-20’s motor power, matched to the larger drum and heavier batch loads. The VFD provides full speed control from gentle polishing to aggressive material removal—standard, not optional. The additional horsepower prevents speed drop-off under the heavier media charges the RF-50’s drum carries. |
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Hydraulic disc unload with dumping system At the end of a cycle, the drum tilts to separate parts from media and feeds them into a recovery bin below the machine. With 1.5 cu ft of batch volume, manual scooping would be time-consuming and inconsistent. The dumping system keeps changeover times short even at higher batch volumes. |
Polyurethane-lined drum and disc Durable polyurethane lining protects parts from metal-to-metal contact with the drum body and absorbs impact energy. The larger drum surface area means more liner is exposed to media wear—the polyurethane’s durability is important at this scale to maintain long service intervals. |
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Upflow drain system Water is pushed up through the disc gap and drains toward the top of the machine, keeping the drain above the media level. This prevents media clogging during continuous-flow operation—especially important on the RF-50, which runs heavier media loads than the RF-20 and generates more swarf per cycle. |
Digital process timer + RPM/amp meters Set precise cycle times and monitor machine performance in real time. For shops transitioning from the RF-20 to the RF-50, the same control interface means no retraining—operators adjust speed and timer settings the same way they did on the smaller machine. |
RF-50 Centrifugal Disc Basic Operation
To operate the RF-50 Centrifugal Disc Finisher, manually load the barrel with media, parts, and compound. Turn on the machine and set it to your desired speed. Then, drop in your parts and allow the machine to complete the cycle. Once the cycle is finished, press the “stop” button to stop the cycle. Position the recovery bin under the machine, and slowly tip the barrel to separate the parts from the media.
What the RF-50 Is Built For
The Step-Up for Daily Production Finishing
The RF-20 is the entry point—the machine for evaluating centrifugal disc finishing or running small batches in tight spaces. The RF-50 is what comes next: the machine for shops that have validated the process and need to run it as a daily production operation with meaningful throughput.
At 1.5 cubic feet, the RF-50 processes roughly twice as many parts per cycle as the RF-20. For a shop running 8–10 batches per shift, that capacity difference means processing twice the daily volume on the same number of cycles—or processing the same volume in half the cycles, freeing the machine and operator for other work. Either way, the per-part finishing cost drops.
Larger Parts That Don’t Fit the RF-20
The RF-50’s 20″ drum diameter is nearly double the RF-20’s 11″ tub. This isn’t just about volume—it’s about which parts physically fit. Components in the 4–7″ range that would crowd or jam in the RF-20’s tub tumble freely in the RF-50 with proper media spacing. Examples include:
- Mid-size stamped brackets and formed sheet metal components
- Larger machined fittings, valve components, and connector housings
- Cast and MIM components with wider profiles
- 3D-printed metal parts that exceed the RF-20’s tub dimensions
- Small gear blanks, sprocket components, and power-transmission hardware
Who Buys the RF-50
- Small-to-medium machine shops that deburr and polish parts daily and have outgrown the RF-20’s batch capacity—or are buying their first centrifugal disc machine and know from sample testing that they need more than 0.7 cu ft.
- Contract manufacturers and job shops that need an economical finishing machine to add as a secondary operation. The RF-50’s price-to-capacity ratio makes it practical for shops that can’t justify the RF-100’s larger investment but need production-level throughput.
- Production cells adding inline finishing where the finishing machine sits between machining and inspection. The 50″ x 37″ footprint fits into most cell layouts without major reconfiguration.
- Shops replacing vibratory equipment that want faster cycle times and better finish quality. The RF-50’s 1.5 cu ft capacity matches many common vibratory bowl sizes, making it a direct replacement with 10–30x faster processing.
Choosing the Right RF-Series Size: RF-20, RF-50, or RF-100
|
Factor |
RF-20 |
RF-50 |
RF-100 |
|
Capacity |
0.7 cu ft |
1.5 cu ft |
3.5 cu ft |
|
Drum Size |
11″ x 11.5″ |
20″ x 15″ |
(Verify from RF-100 page) |
|
Motor |
1 HP |
2 HP |
(Verify—likely 5+ HP) |
|
Footprint |
33″ x 33″ |
50″ x 37″ |
(Verify from RF-100 page) |
|
Weight |
575 lbs |
850 lbs |
(Verify from RF-100 page) |
|
Best For |
Process evaluation, R&D, small-batch, smallest shops |
Daily production finishing, small-to-medium shops, the economical step-up |
High-volume production, larger batch sizes, established operations |
Choose the RF-20 if you’re evaluating centrifugal disc finishing, your daily volumes are small, and your floor space is very limited. The RF-20 is the lowest-cost entry point.
Choose the RF-50 if you’re running centrifugal disc finishing as a daily production operation, you need more than 0.7 cu ft of batch capacity, your parts are too large for the RF-20’s 11″ tub, or you want the best capacity-to-cost ratio in the RF-Series. The RF-50 is the economical workhorse.
Step up to the RF-100 if your production volume demands 3.5 cu ft per cycle, you’re processing heavier parts and denser media loads, or your operation has scaled to the point where the RF-50’s capacity creates a bottleneck.
Not sure which size fits? Send us sample parts—we’ll process them free of charge and recommend the right machine.
Are You Interested in the RF-50?