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Frame
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Clamping Speed
The speed at which the grip jaws close or open can be adjusted by the flow control valves located on the
speed control manifolds. A speed control manifold is located on the rear of each crosshead. A separate
flow control valve is provided for the clamping speed and unclamping speed, see Figure 13. To adjust a
flow control valve:
1. Loosen locknut (see Figure 13).
2. Turn the adjustment knob as desired; increase speed by turning the knob counterclockwise and
decrease speed by turning the knob clockwise.
3. Tighten the locknut.
4. Check jaw operation before inserting a specimen or performing a test.
Factory clamping speed is set to 4 mm/sec (0.16 in/sec) closure rate or less. A hazard to
operators may be created if the clamping speed is adjusted faster than 4 mm/sec (0.16 in/
sec).
Use caution if adjusting the clamping speed of the jaws. The jaws can be adjusted to move
very quickly. Keep fingers and hands free of jaws.
Figure 13. Clamping speed adjustment - flow control valves
Upper grip close
Upper grip open
Lower grip open
Lower grip close
Adjustment knob
Locknut
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