For general purpose mixing use in laboratories
 
High rates of shear (rates of shear that exist in circulation of the drilling fluid in wells) are best obtained when there is little clearance between the stator and the rotor, or when the mud is pumped through a small orifice or opening.
 
Waring blenders, in which the blades rotate in a recessed section at the bottom of container, provide high shearing rates, and are suitable for shearing small quantities (about a liter) of mud. They can only be used for short periods of time because the temperature rises rapidly, with consequent loss of water by evaporation. The Waring Blender, with its high shear mixing impeller, is specified in several API test procedures for preparation of samples.
 
Single Speed Blenders
Specifications
RPMs: 22,000 RPM 
Capacity: 40oz (1.2 Liter) 
Heat Resistant Glass Container w/Cover 
Epoxy Coated Base, Stainless Steel Blades
 
Two Speed Blenders
Specifications
Push-Button Solid State Control 
RPMs: 18,000 & 22,000 
Capacity: 40oz (1.2 Liter) 
Heat Resistant Glass Container w/Cover 
Epoxy Coated Base, Stainless Steel Blades 
 
Seven Speed Blender
Specifications
Push-Button Solid State Control 
RPMs: 3,500 - 7,000 - 11,500 - 14,500 - 17,000 - 19,000 - 22,000 
Capacity: 40oz (1.2 Liter) 
Heat Resistant Glass Container w/Cover 
Epoxy Coated Base, Stainless Steel Blades 
Blender Base, Single Speed