The Rotary Micro RifflerTM easily and automatically divides samples into eight (8) smaller representative samples for analysis. By repetitive divisions of the collected smaller samples, the desired final sample size can be easily obtained. The Rotary Micro RifflerTM has two basic components: a circular vibrating bowl and a sample collector. The vibrating bowl is amplitude variable and controls the delivery rate of the initial powder sample. The collector consists of a rotating splitter holding eight test tubes. The size of the test tube may be varied to accommodate the initial sample size. Test tubes afford simple filling, emptying and cleaning. To accommodate a variety of materials the Rotary Micro RifflerTM has two sets of controls: one for the delivery rate and the second for the rotation rate of the collectors. By varying these two controls, accurate divisions of any powder may be achieved, regardless of particle size or density, in a reasonable time. To divide a sample, up to 120 cm3 of powder is loaded into the vibrator bowl. The vibrator bowl automatically feeds the collector and the test tubes rotating below the feed chute. After all the material has been delivered into the test tubes, further reduction in sample size may be accomplished by emptying the contents of one or more of the test tubes into the bowl and repeating the procedure until the desired sample size is achieved. The Sieving RifflerTM is designed to handle larger quantities of powder than the Rotary Micro RifflerTM. 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 RifflerTM has three basic components: a 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 RifflerTM offers the same controls over collector speed and delivery rate as the Rotary Micro RifflerTM. 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 RifflerTM, smaller samples can be obtained by splitting the contents of one compartment on the Rotary Micro Riffler.TM The durable stainless steel collectors are appropriate for both laboratory and industrial environments. Physical measurements, such as particle size, surface area, density, etc. often require reduction of large quantities into smaller samples. Therefore it is necessary that the powder sub - sample used for analysis be representative of the initial lot or batch for reproducible and valid data. Quantachrome's rifflers are designed to accurately and reproducibly prepare such representative powder samples from larger laboratory or bulk quantities using the statistically superior method of spin, or rotary, riffling. Note: When ordering the Sieving Riffler, please specify the sieve size you require. Microns 2360 2000 1700 1180 1000 850 710 600 500 425 355 300 250 212 180 150 125 106 90 75 63 53 45 Mesh 8 10 12 16 18 20 25 30 35 40 45 50 60 70 80 100 120 140 170 200 230 270 325 SIEVING RIFFLER Rotary Micro Riffler Specifications Max. Capacity: Collector Tube Volumes: Max. Particle Size: Electrical: Height: Width: Depth: Weight: 120 cm3 4 cm3 and 15 cm3 2.5 mm 110-120V or 220-240V, 50/60 Hz 33 cm (13") 20 cm (7.75") 18.5 cm (7.25") 7.3 kg (16 lbs.) ROTARY MICRO RIFFLER™ ™ Sieving Riffler Specifications Max. Capacity: Collector Compartment Volume: Max. Particle Size: Sieve Diameter: Sieve Material : Electrical: Height: Width: Depth: Weight: 2500 cm3 300 cm3 5 mm 5" Brass (some sizes also available in Stainless Steel) 110-120V or 220-240V, 50/60 Hz 51cm (20") 51cm (20") 51cm (20") 29 kg (63 lbs.)