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I was torqueing BNC connectors by feel for 3 years until a loose one bit me on a CRJ
Last Tuesday I was chasing an intermittent GPS flag on a CRJ 200 in Tulsa and finally traced it to a BNC connector I had hand-tightened myself two weeks before. The center pin felt fine but the shell was loose enough to wiggle, and my multimeter showed the shield resistance jumping between 0.2 and 4 ohms when I tapped the rack. I had always gone by feel because the spec calls for 12 inch-pounds and my wrench felt too big for that little nut. Bought a 5/16 crowfoot and a small torque wrench the next morning, went back through every connector on that rack, and found two more that were under spec. How are you all torquing the small BNCs in tight spots, crowfoot or something else?
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robin_wright7d ago
Ever tried just using a stubby wrench with a 5/16 socket? That little nut on a BNC is a pain in tight spots, and a crowfoot on a breaker bar is overkill for 12 inch-pounds. I keep a small inch-pound wrench in my bag and it works fine once you get the feel for the click. Two weeks of chasing a flag because of hand tight is exactly how you learn. Check your whole fleet now, not just that one rack.
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