73
Pneumatic Grips
Product Support: www.instron.com
How Operator Protection works with grips
When in SET UP mode, pneumatic grips close at a reduced initial grip pressure. The
lower the pressure, the lower the force and speed at which the grips close. You should
therefore set this speed to the minimum required to close the grips and grip the
specimen within a reasonable time, but taking into account that even low pressures can
cause injury.
The default value is 15 psi. The following table lists recommended initial grip pressures
for the pneumatic grips listed in Table 9 on page 72:
Minimum pressure may be slightly higher or lower for any given grip due to age,
environmental conditions and use.
Be aware that even at these recommended initial grip pressures, the force exerted
by the closing grips can cause injury.
For example, a 10 kN grip closing at the default initial pressure of 15 psi exerts a
minimum force of 4kN (900 lbf). The same grip closing at 7 psi exerts a minimum force
of 1.9kN (420 lbf), still a significant force that can cause injury.
Be aware also that setting initial grip pressure too low may result in the grip not
closing completely at the initial grip pressure. This may cause a hazard when the
grips transition to full pressure.
If the grips do not close completely at the initial pressure, they will close at full force
when the grips transition to full pressure.
Grip model number Grip capacity
Recommended initial grip
pressure - psi (bar)
2712-051 50 N 15 (1.03)
2712-052 250 N 12 (0.83)
2712-041 1 kN 9 (0.62)
2712-042 2 kN 5 (0.34)
2712-045 5 kN 8 (0.55)
2712-046 10 kN 7 (0.48)
To Next Page
Loading...
