When a company says that its clamp can extert X amount of force, what does that mean? Before the clamp will snap? That a user will not be able to tighten it any further?
Specifically I am interested in the specs on the "Quick-Grip One-Handed Bar Clamp / Spreader" shown here: http://www.coastaltool.com/cgi-bin/welcome.pl?ref=froogle+page=/clamps_vises/quick-grip/qg_bar_clamp.htm
It says that the clamp "Exerts up to 250 lbs of clamping pressure". I've used this clamp and tightened it as best I could by hand, squeezing the trigger. Assuming I have a "normal" strength grip, would that mean that at that point the clamp is exerting 250 pounds? What might the multiplier be? What if I used another clamp to squeeze the trigger of the first clamp? TIA. -- Igor