4 ms·

Yeah, this is compounded by the fact that our products go into marine environments - all our fasteners are 316 stainless but there are still sometimes galvanic

Yeah, this is compounded by the fact that our products go into marine environments - all our fasteners are 316 stainless but there are still sometimes galvanic issues.

Gracana 9y ago
Stainless fasteners are the worst. My company builds food equipment so they're a necessity, but... ugh. They gall terribly and they're squishy. If there happens to be a burr or crud in the threads, you might as well grab your angle grinder and drill, because that screw is not going to come out any other way.
- DanBC 9y ago
  It's interesting you say that, because I had a good experience with stainless! I used to use a lot of stainless bolts on machines that went into hostile[1] environments. We used a variety of hex socket bolts, with thread lock compounds and calibrated torgue drivers to put them in and uncalibrated drivers to take them out when they eventually came back for refurb. We rarely had problems putting them in or taking them out. I don't know why problems were so rare. I think it being a safety critical industry helped: we bought expensive bolts and tools, and people had some training to use them. [1] These were used on "Chock Control Interfaces". Here's a video. The box he's pushing buttons on is a chock control interface. https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s Here's an explanation of longwall mining and what a chock is (simply, powered roof supports that move forward as the cutting tool removes material): http://undergroundcoal.com.au/fundamentals/07_equipment_1chock.aspx http://undergroundcoal.com.au/fundamentals/07_equipment_1cho... https://en.wikipedia.org/wiki/Longwall_mining#Equipment https://en.wikipedia.org/wiki/Longwall_mining#Equipment
  - ironcan 9y ago
    > https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s Going on a tangent here, but are miners not supposed to wear any kind of breathing protection?!

Yeah, this is compounded by the fact that our products go into marine environments - all our fasteners are 316 stainless but there are still sometimes galvanic issues.

Gracana 9y ago

Stainless fasteners are the worst. My company builds food equipment so they're a necessity, but... ugh. They gall terribly and they're squishy. If there happens to be a burr or crud in the threads, you might as well grab your angle grinder and drill, because that screw is not going to come out any other way.

DanBC 9y ago
It's interesting you say that, because I had a good experience with stainless! I used to use a lot of stainless bolts on machines that went into hostile[1] environments. We used a variety of hex socket bolts, with thread lock compounds and calibrated torgue drivers to put them in and uncalibrated drivers to take them out when they eventually came back for refurb. We rarely had problems putting them in or taking them out. I don't know why problems were so rare. I think it being a safety critical industry helped: we bought expensive bolts and tools, and people had some training to use them. [1] These were used on "Chock Control Interfaces". Here's a video. The box he's pushing buttons on is a chock control interface. https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s Here's an explanation of longwall mining and what a chock is (simply, powered roof supports that move forward as the cutting tool removes material): http://undergroundcoal.com.au/fundamentals/07_equipment_1chock.aspx http://undergroundcoal.com.au/fundamentals/07_equipment_1cho... https://en.wikipedia.org/wiki/Longwall_mining#Equipment https://en.wikipedia.org/wiki/Longwall_mining#Equipment
- ironcan 9y ago
  > https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s https://www.youtube.com/watch?v=WmwEB4DY_jc&t=169s Going on a tangent here, but are miners not supposed to wear any kind of breathing protection?!