Mechanical motor driven shaker for use when performing sand equivalent tests. Synchronous gear drive assures 175 ( ±2) stroke per minute accuracy, eliminating errors inherent in hand shaking. Direct drive means no belts to replace and less maintenance between tests. 3-position electronic timer has presets for 45 seconds, 10 minutes or continuous. Available in 115v and 220v models. Dimensions: 12 x 24 x 24 in LWH (31 x 61 x 61cm).