I'm looking for a device or tool that can be modified or ganged to field tighten four 1/2" bolts at the same time. If it works, I may try eight or sixteen 1/2" bolts and/or another joint with three or six 3/8" bolts. All bolts are closely spaced, the 1/2" bolts are in square groups of four, 1 1/4" apart, the 3/8" bolts are 1" apart in groups of three in straight lines. Currently we use a single 1/2" electric impact. The problem is that the worker has to touch each bolt several times because due to joint geometry and field conditions, tightening one bolt tends to loosen an adjacent one. And the noise makes it simply impossible to communicate besides being a hearing and health hazard. I'm looking for a quieter mode of operation. We recently had a project with (4,000) joints each with (16) 1/2" bolts on one side and (12) on the other side. The worker's time and then mine to inspect all joints was a PITA. I would prefer a hydraulic solution that would apply torque to individual bolts at the same time and could be turned off when the operator noted that all bolts stopped turning. I'm open to any ideas no matter how crazy, I can get almost anything machined or customized. I'd make my own with four 1/2" air or electric impact guns but am looking for a more elegant, quieter and lighter solution. Any thoughts, experience or guidance would be greatly appreciated. If this is not the best forum, please re-direct me...
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