Dead-Weight Direct Shear Machines are motorized units for direct and direct/residual shear testing of soil samples and use a 10:1 dead-weight beam loading system to apply vertical confining pressures. These compact, self-contained units have similar designs but differ in instrumentation for data measurement and collection. Both are built for harsh lab environments and require little floor space.
The strain rate is precisely controlled from 0.0001 to 0.3in/min (0.00254 to 7.62mm/min) ±1% by an advanced stepper-motor drive system. The maximum shear displacement is 0.8in (20.3mm). The vertical load capacity is 1,411lb (639.9kg), and the maximum horizontal shear force is 1,500lbf (6.6kN). Easily adjust the settings using the digital thumbwheel controls.
A solid 1.25in (31.75mm) base for the shear box assembly is mounted on a sturdy powder-coated steel cabinet and stand with heavy-duty casters for easy mobility. An anodized aluminum crossbar, drainage plates, a loading block, and a water chamber with a drainage port are included. For additional durability, the water chamber has a corrosion-resistant Teflon™ coating.
Round or square direct shear boxes are available in a variety of sizes and are purchased separately. Shear box counterbalances are designed to offset the top-half weight of shear boxes and are also purchased separately. Two options are available, based on the size of the shear box. Weight sets are purchased separately, and at least one US or Metric weight set is required for proper operation.
The HM-380R Standard Dead-Weight Direct Shear Machine features an HM-424D 1,500lbf (6.6kN) Load Cell with a digital readout to display shear force and analog dial indicators to measure vertical and shear displacement.
Accessories can be purchased separately to upgrade the HM-380R for partial or complete electronic measurement and data collection. These include the HM-739 Linear Variable Displacement Transducers (LVDTs), which have a 1in (25.4mm) range with 0.0001in (0.00254mm) resolution to measure horizontal and vertical displacement. The LVDTs must be connected to two HM-418 Two-Channel or HM-419 Four-Channel Data Readouts. Using the HM-419 Four-Channel Data Readout provides an additional channel to collect force measurements from the load cell. The readouts display real-time values on a large, bright display that includes GetData 5 software to transfer data to a computer with a Windows operating system.
The HM-380D Digital Dead-Weight Direct Shear Machine performs both direct and residual shear measurements and is configured for complete electronic measurement and data collection. It uses a load cell to measure shear force and LVDTs to measure horizontal and vertical movements, all processed through an HM-419 Four-Channel Data Readout. The included GetData 5 software transfers data to the user’s Windows-based computer via a mini USB port for analysis, enabling the creation of reports and graphs from a spreadsheet application. HMA-610 Direct/Residual Shear Data Acquisition Software, listed separately, works with the Data Readout to record real-time test data, calculate results, and prepare reports following ASTM and AASHTO requirements.
Features:
- Motorized units test direct or direct/residual shear of soil samples
- A simple 10:1 dead-weight beam loading system applies vertical confining pressures
- Compact machines are built for harsh lab environments
- Electronically collect and calculate direct/residual shear testing data
- Mounted on a sturdy steel cabinet with heavy-duty casters for easy mobility
Included Items:
- HM-380R Standard Dead-Weight Direct Shear Machine (120V, 50/60Hz or 230V, 50/60Hz)
- S-Type load cell, 1,500lbf
- Built-in digital display
- Analog dial indicators
- Anodized aluminum crossbar
- Drainage plates
- Water chamber with drainage port
- Loading block
- HM-380D Digital Dead-Weight Direct/Residual Shear Machine (120V, 50/60Hz or 230V, 50/60Hz)
- S-Type load cell, 1,500lbf
- Four-Channel Data Readout
- Linear Variable Displacement Transducers
- Anodized aluminum crossbar
- Drainage plates
- Water chamber with drainage port
- Loading block
- GetData software
Accessories:
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