Showerthought: The whole approach to traction sheave grooves has flipped in the last five years

I was doing a full rope change on a 15 story office building in Denver last month, and it hit me how different the groove inspection process is now. Five years back, the standard was to mic everything, check for even wear, and if you saw a 10% reduction from the original spec, you'd start talking about re-grooving or replacement. The focus was all on the numbers. Now, with these new composite ropes and different lubricants, I'm seeing shops look at groove shape and surface finish way more. A guy from a big OEM told me they've had machines run fine with deeper wear patterns than the old charts said was okay, as long as the groove profile isn't deformed. It feels like we're moving from a strict measurement rule to judging the overall condition. Has your shop changed how you call a sheave for replacement, or are you still sticking to the old wear limits?

3 comments

3 Comments

shah.matthew2mo ago

Wait, deeper wear is okay now?

blakefox2mo ago

It's always been okay if you ask me, @shah.matthew. The whole point is to use your stuff, not just look at it. Scratches and marks tell the story of what you've actually done with it. Keeping things perfect in a box seems like a waste. Real wear shows it was made for a life, not a shelf.

hernandez.jordan1mo ago

But what if you need to sell it later? @shah.matthew, some things lose most of their value the second you put a scratch on them. It's not about keeping it in a box forever, but being careful makes sense if you ever want to trade up or get your money back.