Replacement Pestle for KIMBLE® KONTES® Tenbroeck Tissue Grinder, all-glass, 1/Case

• Manufactured from borosilicate glass 3.3
• All-glass construction
• Popular style which affords the choice of hand or motor operation
• Pestle is tooled for an appropriately sized single-hole rubber stopper (not supplied)
• These grinders can be motor-driven at slow speeds by inserting one end of a short metal rod in the stopper and inserting the other end into the motor chuck
• Replacement components are available and completely interchangeable
• Clearance between pestles and tubes is 0.004 " to 0.006 "

KIMBLE® KONTES® Tenbroeck Tissue Grinder, all-glass produce homogenates by a combination of shearing and compression actions. The tissue sample is progressively ground (sheared) into smaller pieces at the rounded end of the pestle as the spinning pestle is lowered into the tube. As the pestle is forced lower into the tube, the sample is displaced and forced between the straight outside wall of the pestle and the inside wall of the tube, compressing the tissue cells until they rupture. When the tube is pulled away from the pestle, a slight vacuum is created that pulls the sample back past the compression area, resulting in an additional homogenization stroke. The degree of homogenization is controlled by the clearance between the pestle’s and tube’s cylindrical section (radial distance usually 0.002 - 0.003 inches), the rotational speed of the pestle, and the number of compression strokes made.

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