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The Sieving Riffler™ is designed to handle larger quantities of powder than the Rotary Micro Riffler™. Additionally, particles larger than a particular size and/or foreign bodies can be excluded from the riffling process by attaching a sieve to the top of the hopper.

The Sieving Riffler has three basic components: an aluminum cylindrical vibrating hopper, a rotating sample collector table and a replaceable sieve. The collector is divided into eight (8) removable stainless steel compartments. The sieve is mounted on top of the vibrating hopper. The Sieving Riffler offers the same controls over collector speed and delivery rate as the Rotary Micro Riffler.

To divide a sample, the hopper is filled or partly filled with sample. The vibrator amplitude is set to automatically feed the powder into the rotating collectors. After all the material has been delivered, further reduction in sample size may be achieved by emptying the contents of one or more collector back into the hopper for additional splitting. When the amount of sample to be re-riffled is no longer reasonable for the Sieving Riffler™, smaller samples can be obtained by splitting the contents of one compartment on the Rotary Micro Riffler. The durable stainless steel collectors are appropriate for both laboratory and industrial environments.

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