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

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

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

All details and results: Please click here.

Published papers:

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)

Book on powder technology

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

More information


© 1996-2018 Dietmar Schulze. All rights reserved.
Last updated 23 May 2018.