Handrail manufacturers often weld straight pipes to elbow connectors, then must grind the welds smooth. To speed this task, some use contraptions like this MB 650 RV product by German power tool manufacturer GeBrax, which attaches to an angle grinder to turn it into a flexible strip sander:

Other German companies, like Flex Tools and Fein, make dedicated pipe sanders:

There are also a host of sketchy-looking "As Seen on TV"-type companies flogging their own angle grinder attachments…

…but I think I'd stick with the reputable German brands.

always wondered how they got those so nice.

We downsized our communal motorcycle workshop recently and I inherited one of these.  Still have no use for it but it's too cool to throw away! 

I could use one of those.  'Doubt they are available at the local hardware.

If you need to grind pipe, are you really not going to use a product called a pipe sniper? https://www.eisenblaetter.de/shop/en/rohr-sniperr-802-ht-grundset-us.html Or maybe a Gladius? https://www.eisenblaetter.de/shop/en/belt-grinding/belt-grinders/gladiusr-1802-ht.html Either way, they win the award for best product naming

Same idea as a crankshaft grinder. Not a new idea 

Just using the same method of crankshaft grinding that's been In business for years. Nothing really new

I’m a lapsed industrial designer. I was born in NYC and figured I’d die there, but a few years ago I abandoned New York to live on a farm in the countryside with my wife. We have six dogs.

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