Gilson Rotary Sifter

Gilson Rotary Sifter: The Gold Standard for Aggregate Gradation

The Gilson Rotary Sifter, model SS-20, is a modern take on a traditional design, trusted by state departments for its precision in aggregate gradation. This high-quality sifter combines robust construction with quiet, safe, and durable operation, ensuring both efficiency and longevity. It strictly adheres to specification requirements, making it ideal for accurate particle size testing.

Key Features & Benefits:

• Precision Testing: Accurately tests construction aggregates and granular materials in the 1in–No.635 (25mm–20µm) size range.
• Versatile Sieve Compatibility: Easily adjusts to accommodate 8in (200mm) or 12in (300mm) diameter test sieves.
• High Capacity: Holds up to ten 8in/200mm full-height sieves or six 12in/300mm full-height sieves. For half-height sieves, it can manage twenty 8in/200mm or thirteen 12in/300mm sieves, plus a pan.
• Effortless Operation:
  • No Clamping Needed: Simply place the sieve stack, close the door, tilt, and press start.
  • Automated Agitation: Continuously rotates sieves with rubber-covered stainless-steel drive rollers, while mechanical hammers tap each sieve for optimal particle separation.
  • User-Friendly Controls: Features an ergonomically positioned side knob for easy tilting and a digital countdown timer with a bright 0.5in LED display.
• Enhanced Safety & Durability:
  • Enclosed Cabinet: Made from CNC machined MDF board, it effectively controls airborne dust (quartz, silica, crystalline particles) and reduces noise.
  • Robust Construction: Heavy-duty commercial-grade hinges for the full-width door and a sturdy, powder-coated ASTM A513 steel tubing stand.
  • Safety Interlocks: A door safety interlock switch stops operation if the door is opened during testing, and bearing and rod covers eliminate exposed moving parts, complying with OSHA regulations.
  • Durable Components: Tapping hammer assemblies are crafted from 6061 aluminum alloy with Ultra High Molecular Weight (UHMW) Polyethylene heads.
• Reliable Performance: Powered by a dependable 1/4hp continuous-duty motor.
• Precise Timing: The digital timer accurately controls operations up to 99 minutes and 59 seconds (±1 second), ensuring consistent repeatability. It includes a pause function, saves settings between tests, and features a 5-second audible alarm upon completion.

Specifications:

• Sieve Frame Diameter: 8in (203mm), 12in (305mm), 200mm, 300mm
• Particle Size Range: 1in–No.635 (25mm–20µm)
• Motion/Agitation: Rotary/Tapping
• Sieve Capacity (with pan):
  • Full-Height: (10) 8in/200mm Sieves or (6) 12in/300mm Sieves
  • Half-Height: (20) 8in/200mm Sieves or (13) 12in/300mm Sieves
  • Intermediate-Height: (10) 12in Sieves
• Mounting Capability: No
• Timing Capacity: 99 minutes, 59 seconds (±1sec)
• Electrical: 115V, 60Hz, 1/4hp
• Product Dimensions (WxDxH): 19 x 24 x 58in (483 x 610 x 1,473mm)

For those seeking an even quieter option, explore our Gilson Silent Laboratory Sifters, designed with modern noise reduction and worker protection in mind.