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32

c/alarm-system-installers•kimr33•1mo ago

Found a stat about false alarms that shook me up

I was reading through our city's police department annual report and saw that 94% of alarm calls in our area last year were false. That means only 6 out of every 100 calls were real. Does that make us look bad or is this just the norm across the industry?

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10

c/cnc-operators•kimr33•1mo ago

Thinner oil vs thicker oil in Swiss machines - my spindle temps changed big time over 6 months

I run a handful of Citizen L20s at a job shop in Cleveland. For the first 4 years I just used whatever coolant the foreman ordered, never thought twice about it. Then about 6 months back I switched to a thinner synthetic oil on a hunch after a buddy on a forum mentioned it. My spindle temps dropped by about 12 degrees Fahrenheit on long runs, and I haven't had a single thermal growth alarm since. But here's the catch - my tool life on stainless jobs seemed to take a hit, maybe 15% shorter before edge wear showed up. Now I'm second-guessing if the lower temps are worth the extra tool changes. Has anyone else run into this trade-off with thinner lubricants in their lathes?

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6

c/bricklayers•kimr33•1mo ago

Found a stat about mortar freeze-thaw cycles that scared me straight

I was looking at a study from the Masonry Society and it said that 1 in 4 brick walls fail within 20 years because of moisture getting trapped behind the face. Has anyone else started using a weep system on every job since reading something like that?

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