1
INTRODUCTION
The Gilson model HM-380R Dead-Weight Direct Shear
Machine is a motorized unit for direct shear testing of
soil samples and uses a 10:1 dead-weight beam load-
ing system to apply vertical confining pressures. These
compact, self-contained units are built for harsh labo-
ratory environments and require little floor space.
This Direct Shear Unit has a strain rate of 0.0001 –
0.3 in/min (0.0025 – 7.62 mm/min) with a maximum
shear displacement of 0.8in (20.3mm) and the travel
speed is set with the thumbwheels on the left side of
the unit. The residual shear force is determined by a
load cell while real time load settings and peak load are
displayed on the digital readout. Vertical load capacity
is 1,411lbs (640kg) and the maximum horizontal shear
force is 1,500lbf (6.67kN). Consolidation and shear dis-
placement are measured with analog dial indicators.
Shear boxes and weight sets are required and sold
separately.
FEATURES
• Total shear capacity of 1,500lbf (6.67kN)
• Stepper motor controls strain rates to +/- 1% from
0.0001 – 0.3in/min (0.0025 – 7.62mm/min)
• Teflon coated anodized aluminum water chamber
with drainage port included.
• Meets requirements for ASTM D3080 and AASHTO
T 236
REQUIRED ACCESSORIES (purchased separately)
Direct shear boxes are sold separately and are avail-
able in a wide range of inch and metric sizes with round
or square shapes. See all options at www.globalgilson.
com and in the chart.
Direct Shear Boxes & Accessories
Description
Shear Box
Cutters
Extruders
Porous
Stones
Round Direct Shear Boxes
50mm (1.97in) Diameter
2.0in (50.8mm) Diameter
60mm (2.36in) Diameter
2.42in (61.4mm) Diameter
2.5in (63.5mm) Diameter
100mm (3.94in) Diameter
4in (101.6mm) Diameter
HMA-733M
HMA-733
HMA-734M
HMA-734
HMA-735
HMA-737
HMA-736
HMA-743M
HMA-743
HMA-744M
HMA-744
HMA-745
HMA-747
HMA-746
HMA-763M
HMA-763
HMA-764M
HMA-764
HMA-765
HMA-767
HMA-766
GSA-208
GSA-210
GSA-213
GSA-217
GSA-219
GSA-231
GSA-232
Square Direct Shear Boxes
50mm (1.97in) Square
2.0in (50.8mm) Square
60mm (2.36in) Square
2.42in (61.4mm) Square
2.5in (63.5mm) Square
100mm (3.94in) Square
4in (101.6mm) Square
HMA-733MS
HMA-733S
HMA-734MS
HMA-734SA
HMA-735S
HMA-737S
HMA-736S
HMA-743MS
HMA-743S
HMA-744MS
HMA-744SA
HMA-745S
HMA-747S
HMA-746S
HMA-763MS
HMA-763S
HMA-764MS
HMA-764SA
HMA-765S
HMA-767S
HMA-766S
GSA-208S
GSA-210S
GSA-213S
GSA-217S
GSA-219S
GSA-231S
GSA-232S
Rev: 07/2020
HM-380R Standard Direct Shear
Machine, Dead-Weight
Dead-Weight Direct Shear Machine with Analog Dial
Indicators and Shear Box shown (Shear Box sold separately)
OPERATING MANUAL
PHONE: 800-444-1508
P.O. Box 200, Lewis Center, Ohio 43035-0200
740-548-7298
E-mail: [email protected] Product Web Page:
FAX: 800-255-5314
740-548-5314
