- US Sales
- International Sales
- Technical Support
- Human Resources
Ro-Tap Sieve Shakers is a sieving machine that is widely accepted in standardized particle sizing test methods. The Ro-Tap generates 278 oscillations and 150 taps per minute, as specified in some ASTM and other sieving applications. These shakers have a horizontal, circular motion with a vertical tapping action to ensure accurate and consistent particle analysis testing results.
These rugged test sieve shakers are built for heavy-duty use and can be bolted to a solid table or sturdy benchtops for stable operation. All models feature a powerful 1/4hp motor for performing consistent particle analysis testing, an adjustable plate sieve support, and a built-in 99-minute x 0.1-second digital timer.
SS-30 8in Ro-Tap® Sieve Shaker holds up to six full-height 8in/200mm diameter test sieves with full-height pan or thirteen half-height sieves with a half-height pan, ISO 200mm sieves can also be used. Recommended for the separation of particle sizes ranging from No. 4–No. 635 (4.75mm–20µm).
SS-31 12in Ro-Tap® Sieve Shaker holds up to four full-height 12in/300mm diameter test sieves and pan, six intermediate-height sieves and pan, or eight half-height sieves and pan. 12in sieves have more than twice the effective sieving area as 8in sieves. Recommended for separations of particle sizes ranging from 1/2in–No. 500 (12.5mm–25µm).
SS-33 8in Duo Ro-Tap® ll Sieve Shaker performs tests on two separate 8in/200mm diameter test sieve stacks simultaneously with precisely the same action as Ro-Tap® single-stack models. Recommended for separations of particle sizes ranging from No. 4–No. 635 (4.75mm–20µm).
SS-30 & SS-33: 8in & 200mm
SS-31: 12in & 300mm
SS-30 & SS-33: No.4–No.635
Full-Height: (6) 8in Sieves or (4) 12in Sieves
Half-Height: (13) 8in Sieves or (8) 12in Sieves
Intermediate-Height: (6) 12in Sieves
SS-30: 115V / 60Hz / 7 Amps
SS-30F: 110/220V / 50Hz / 6.1/3 Amps
SS-30S: 230V / 60Hz / 2.2 Amps
SS-31: 115V / 60Hz / 4.4 Amps
SS-31F: 230V / 50Hz / 2.9 Amps
SS-31S: 230V / 60Hz / 2.2 Amps
SS-33: 115V / 60Hz / 4.4 Amps
SS-33F: 230V / 50Hz / 2.9 Amps
SS-33S: 230V / 60Hz / 2.2 Amps
SS-30 models: 28 x 21 x 25in (711 x 533 x 635mm) WxDxH
SS-31 models: 28 x 21 x 25in (711 x 533 x 635mm) WxDxH
SS-33 models: 30 x 27 x 26in (762 x 686 x 660mm) WxDxH
SS-30: 170.0lb (77.11kg)
SS-30F: 170.0lb (77.11kg)
SS-30S: 170.0lb (77.11kg)
SS-31: 190.0lb (86.18kg)
SS-31F: 190.0lb (86.18kg)
SS-31S: 190.0lb (86.18kg)
SS-33: 242.0lb (109.77kg)
SS-33F: 242.0lb (109.77kg)
SS-33S: 242.0lb (109.77kg)
Enter your name, email, and questions below and we will reply during business hours (8am - 5pm EST, Monday through Friday).