The Original Schulze Ring Shear Testers for powders and bulk solids.
(powder testers - shear testers - flowability testers).
Measure f
lowability - compressibility - consolidation - caking - attrition - wall friction - internal friction.


Our New Small Ring Shear Tester:
The "small" automatic, digitally controlled Ring Shear Tester RST-XS.s for the measurement of flow properties of powders (flowability, caking, wall friction). Automatic, computer-controlled test procedure. Very small specimen volume (standard: only about 30 ml* , smallest approx. 3.5 ml).

More information: Please click here.

*) 1 ml = 1 cm3 = 0.061 in3

Shear cell 3.5 ml
RST-XS.s

New version of "SILO STRESS TOOL" (Please click here)
Program for the assessment of stresses in silos, bins, and containers
- adjusted to requirements of Microsoft Windows 7, 8, and 10* -
*) Windows 7, Windows 8 and Windows 10 are trademarks of Microsoft Corp., USA

Results of Round Robin Test on Ring Shear Testers RST-XS and RST-01.pc

D. Schulze: Round Robin Test on Ring Shear Testers,
Advanced Powder Technology 22 (2011) 2, pp. 197-–202 (in English)

D. Schulze: Ringversuch mit Ringschergeräten,
Schüttgut 16 (2010) 3, pp 146-153 (in German)


ASTM standard on Ring Shear Tester:
D6773: Standard Shear Test Method for Bulk Solids Using the Schulze Ring Shear Tester (please click here to visit the ASTM website)


Recent book on powder technology

Powders and bulk solids
Behavior, characterization, storage and flow
by Dietmar Schulze
(published by Springer)

More information


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Last updated 24 April 2016.