PASCO Specialty & Mfg. Materials Testing Machine ME-8236 Manual De Usuario

Model No.ME-8236

 Operation

Loosen but do not remove the hex nut on each clamp. The 
jaws of the clamp are spring loaded, so the moveable jaw 
will separate from the fixed jaw. Screw the clamp with the 
shorter threaded section into the load cell. Put the threaded 
section of the other clamp up through the hole in the load 
bar, and use the sample nut to hold the upper clamp. NOTE: 
Do not completely tighten the sample nut yet.

Carefully place one end of a coupon between the jaws of the 
bottom clamp. While holding the moveable jaw to keep it 
aligned with the fixed jaw, use the tee-handle and socket to 
tighten the hex nut. CAUTION: Each coupon is fragile. Do 
not let the moveable jaw twist out of alignment with the 
fixed jaw as this might bend the coupon. 

Turn the upper clamp so that it is aligned with the lower 
clamp. Adjust the position of the load bar so that you have 
room to carefully put the other end of the coupon between 
the jaws of the upper clamp. Keep the movable jaw aligned 
with the fixed jaw so that the coupon does not twist or bend. 
Once again, tighten the hex nut. 

Hold the upper clamp so it remains parallel to the lower 
clamp and tighten the sample nut slightly to remove any 
slack in the coupon.

Attach the Velcro® hook material on the two safety shields 
to the Velcro® loop material on the front and back of the 
Load Bar and adjust the position of the shields if needed. 

The Materials Shear Accessory consists of two pieces of 
hardened steel - a front piece and a back piece - held together 
by a pair of permanent screws, and a package of Materials 
Shear Samples. The front piece can slide vertically relative 
to the back piece, which is designed to be mounted on the 
load cell using an included hex key (allen wrench). The two 
pieces have pairs of matching holes with four different diam-
eters to fit a variety of samples for testing. The hole diame-
ters are approximately 1/16”, 3/32”, 1/8”, and 5/32”. The 
Materials Shear Samples includes three 1/8” diameter rods 
each of three metals: aluminum, brass, and mild steel. 
NOTE: Do not use a sample with a hardness greater 
than mild steel.

Use the two mounting screws and the included hex key 
(allen wrench) to attach the back piece of the Materials Shear 
Accessory to the top of the load cell. Note that when the 
front piece is raised by hand as far as it will go, the holes in 
the front piece align with the matching holes in the back 
piece. 

Insert the test sample through the pair of holes that best 
match the diameter of the sample. Use a sample that is long 
enough so that it extends about 1/4” (6 mm) beyond the front 
and back pieces. Doing this makes it easier to remove the 
sample remnants from the accessory after the test.

Metal 

Coupon

Plastic 

Coupon

0.067”, 

1.7 mm

0.099”, 

2.5 mm

0.161”, 

4.0 mm

0.130”, 

3.3mm