Gilson HM-381 Operating Manual

HM-381 & HM-381F Standard Pneumatic Direct
INTRODUCTION
The Gilson HM-381 Standard Pneumatic Direct Shear
Machine is a tabletop unit that provides direct or di-
rect/residual shear values for evaluating the strength
and stability of soils. Manufactured in cooperation with
Karol-Warner, this device utilizes a pneumatic loading
piston for applying the vertical load to the sample. A
calibration chart is included for setting the high load or
the low load via the Fairchild Regulator while a built-in
digital readout displays the vertical load in psi.
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. Consolidation and
shear displacement are measured with analog dial in-
dicators.
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
• T eflon 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
available in a wide range of inch and metric sizes
with round or square shapes. See all options at
www.globalgilson.com and in chart below.
– Direct Shear Boxes and Accessories
PHONE: 800-444-1508
740-548-7298
Shear Machine
P.O. Box 200, Lewis Center, Ohio 43035-0200
E-mail: customerservice@gilsonco.com Product Web Page:
OPERATING MANUAL
Direct Shear Boxes & Accessories
Description Shear Box
Round Direct Shear Boxes
50mm (1.97in) Diameter HMA-733M
2.0in (50.8mm) Diameter HMA-733
60mm (2.36in) Diameter HMA-734M
2.42in (61.4mm) Diameter HMA-734
2.5in (63.5mm) Diameter HMA-735
100mm (3.94in) Diameter HMA-737
4in (101.6mm) Diameter HMA-736
Square Direct Shear Boxes
50mm (1.97in) Square HMA-733MS
2.0in (50.8mm) Square HMA-733S
60mm (2.36in) Square HMA-734MS
2.42in (61.4mm) Square HMA-734SA
2.5in (63.5mm) Square HMA-735S
100mm (3.94in) Square HMA-737S
4in (101.6mm) Square HMA-736S
• A constant supply of compressed air at 90psi (6.2
bar) is required for use.
UNPACKING & SETUP
• Inspect your HM-381 for damage, remove from the
pallet.
• Place Direct Shear Machine on a sturdy, level sur-
face, such as a bench top or HMA-95 Pneumatic
Shear Machine Rolling Cart.
• Review the Connections section and install neces-
sary components.
www.globalgilson.com
1
HM-381
Cutters Extruders
HMA-743M HMA-763M
HMA-743 HMA-763
HMA-744M
HMA-764M
HMA-744 HMA-764
HMA-745 HMA-765
HMA-747 HMA-767
HMA-746 HMA-766
HMA-743MS HMA-763MS
HMA-743S HMA-763S
HMA-744MS
HMA-764MS
HMA-744SA HMA-764SA
HMA-745S HMA-765S
HMA-747S HMA-767S
HMA-746S HMA-766S
FAX: 800-255-5314
740-548-5314
Porous
Stones
GSA-208
GSA-210
GSA-213
GSA-217
GSA-219
GSA-231
GSA-232
GSA-208S
GSA-210S
GSA-213S
GSA-217S
GSA-219S
GSA-231S
GSA-232S
Rev: 05/2020