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Cars are commonly engineered to be driven for 8000h which corresponds to 15 years lifetime. Different story for commercial vehicles of course. Fun fact: cars a

by sonium 5y ago

Cars are commonly engineered to be driven for 8000h which corresponds to 15 years lifetime. Different story for commercial vehicles of course. Fun fact: cars are commonly designed to be operated for 8h in reverse gear over lifetime. Another fun fact: Electric drills are used for an _average_ of 8 minutes over their lifetime.

martyvis 5y ago
> Electric drills are used for an _average_ of 8 minutes over their lifetime. I did see that somewhere, and I think it was in the context that every home has an electric drill, but most might only get used for 1 or 2 projects a year. You would hope though that this might be only a design guide for one of those $30 stocking stuffers. I'm an owner builder and I am pretty sure my drills and impact drivers have racked up many tens of hours.
- amalcon 5y ago
  Also "used" in this context clearly just means "spinning". I did a modest project the other day involving my electric drill. It involved 20 holes, each hole drilled in two steps (pilot with a jig in place, full depth with the jig removed), for 40 spins. I'll guess that each spin took about 3 seconds (because that makes the math easy), so 2 minutes total. I couldn't exactly share the drill with a neighbor in the approximate hour that I spent measuring and repositioning the jig between uses. In the context of duty cycle lifetime, maybe 8 minutes isn't that low -- but I am definitely using it for more than 8 minutes.
  - phaedrus 5y ago
    Using a hole saw and cutting into metal, I'm pretty sure I could spend 8 minutes per hole. Of course I prefer to use the drill press for this, but some projects can't fit and must be done with a hand drill. Then there's the grit wheel or flap disc, which might have me axially loading the drill for 30 minutes at a time (such as for stripping paint or sanding rust off an iron engine block). I think they must be including a lot of people who buy or receive a drill as a gift and never use it at all, to get to 8 minutes average. I do find it believable that the cheaper ones might have a design life of 8 minutes, but that's a sad state of affairs.
    - amalcon 5y ago
      Yeah, that was just the most recent project. When I had to drill through tile back in November, it was definitely several minutes per hole (on the slow speed dictated by the special tile bit). You're probably right about the stat including people who never use the drill at all, or only ever use it to tighten screws.

by sonium 5y ago

martyvis 5y ago

> Electric drills are used for an _average_ of 8 minutes over their lifetime. I did see that somewhere, and I think it was in the context that every home has an electric drill, but most might only get used for 1 or 2 projects a year. You would hope though that this might be only a design guide for one of those $30 stocking stuffers. I'm an owner builder and I am pretty sure my drills and impact drivers have racked up many tens of hours.

amalcon 5y ago
Also "used" in this context clearly just means "spinning". I did a modest project the other day involving my electric drill. It involved 20 holes, each hole drilled in two steps (pilot with a jig in place, full depth with the jig removed), for 40 spins. I'll guess that each spin took about 3 seconds (because that makes the math easy), so 2 minutes total. I couldn't exactly share the drill with a neighbor in the approximate hour that I spent measuring and repositioning the jig between uses. In the context of duty cycle lifetime, maybe 8 minutes isn't that low -- but I am definitely using it for more than 8 minutes.
- phaedrus 5y ago
  Using a hole saw and cutting into metal, I'm pretty sure I could spend 8 minutes per hole. Of course I prefer to use the drill press for this, but some projects can't fit and must be done with a hand drill. Then there's the grit wheel or flap disc, which might have me axially loading the drill for 30 minutes at a time (such as for stripping paint or sanding rust off an iron engine block). I think they must be including a lot of people who buy or receive a drill as a gift and never use it at all, to get to 8 minutes average. I do find it believable that the cheaper ones might have a design life of 8 minutes, but that's a sad state of affairs.
  - amalcon 5y ago
    Yeah, that was just the most recent project. When I had to drill through tile back in November, it was definitely several minutes per hole (on the slow speed dictated by the special tile bit). You're probably right about the stat including people who never use the drill at all, or only ever use it to tighten screws.