My stupid expensive mistake

DirtCleaner
has rocks in the head

Member since September 2013
Posts: 598

My stupid expensive mistake Mar 20, 2023 9:11:27 GMT -5 allbetzoff likes this

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Post by DirtCleaner on Mar 20, 2023 9:11:27 GMT -5

Was going to try to smooth the edges of a sphere before i put the grinding cups on. This was what happened within 2 seconds. I know they are polishing cups but I had no idea how fragile they were. I do now. These are 6" cups and cost me over $200.

And this is on the heels of busting off a grinding tip off of a 5" #80 grinding cup a few weeks ago. Hoping my replacement cup comes in today.

Last Edit: Mar 20, 2023 9:12:44 GMT -5 by DirtCleaner

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jasoninsd can identify rocks - even green ones I Wish I Knew Half The Stuff I Thought I Knew 30 Years Ago! Member since July 2020 Posts: 18,436	My stupid expensive mistake Mar 20, 2023 9:19:25 GMT -5 rockjunquie likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jasoninsd on Mar 20, 2023 9:19:25 GMT -5 I have one four-letter word...ouch! I'm sure you had some other four-letter words on those!!
	Favorite Quotes: "It always seems impossible until it is done." - Nelson Mandela "Life becomes easier when you learn to accept the apology you never got." - Robert Brault "You can't wait until life isn't hard anymore before you decide to be happy." - Nightbirde (RIP 2/19/22) My Etsy Shop: www.etsy.com/shop/MadBadgerLapidary

rockjunquie Global Moderator Member since March 2012 Posts: 35,035	My stupid expensive mistake Mar 20, 2023 13:29:43 GMT -5 jasoninsd likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by rockjunquie on Mar 20, 2023 13:29:43 GMT -5 Oh! Damn! I am so sorry! Glad no one was hurt, though.

hummingbirdstones
misunderstood rock expert

Member since October 2017
Posts: 14,145

My stupid expensive mistake Mar 20, 2023 18:43:44 GMT -5 jasoninsd likes this

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Post by hummingbirdstones on Mar 20, 2023 18:43:44 GMT -5

Holy crap! That hurts just looking at it.

Robin

"Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience."
~ C.S. Lewis

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realrockhound Cave Dweller Chucking leaverite at tweekers Member since June 2020 Posts: 4,538	My stupid expensive mistake Mar 20, 2023 19:16:01 GMT -5 via mobile rockjunquie and hummingbirdstones like this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by realrockhound on Mar 20, 2023 19:16:01 GMT -5 I dunno… I still feel like they shouldn’t have broke like that. Seems defective to me. I’d ask for a refund.

RWA3006 Cave Dweller Member since March 2009 Posts: 4,672	My stupid expensive mistake Mar 20, 2023 19:27:45 GMT -5 rockjunquie, Starguy, and 3 more like this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by RWA3006 on Mar 20, 2023 19:27:45 GMT -5 Find someone to blame it on and you'll feel better. I suggest jasoninsd would make a mighty fine scapegoat. Wonder if they have any kind of warranty.
	If we were able to carry the love and tolerance shown here into the world as a whole and get anyone to follow the example set, who knows what could be born from that? Stonemon RIP

AzRockGeek
has rocks in the head

Member since September 2016
Posts: 704

My stupid expensive mistake Mar 20, 2023 19:28:03 GMT -5 rockjunquie, hummingbirdstones, and 1 more like this

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Post by AzRockGeek on Mar 20, 2023 19:28:03 GMT -5

Mar 20, 2023 19:16:01 GMT -5 realrockhound said:

I dunno… I still feel like they shouldn’t have broke like that. Seems defective to me. I’d ask for a refund.

I agree! Probably a bad solder job on the diamond segments. I picked up a few core drilling bits from HD, I abuse the heck out of these things when truing up the sphere, I never lost a tooth.

What brand are these?

That is some nice Gneiss Schist!

jasoninsd
can identify rocks - even green ones

I Wish I Knew Half The Stuff I Thought I Knew 30 Years Ago!

Member since July 2020
Posts: 18,436

My stupid expensive mistake Mar 20, 2023 20:11:34 GMT -5 RWA3006, rockjunquie, and 1 more like this

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Post by jasoninsd on Mar 20, 2023 20:11:34 GMT -5

Mar 20, 2023 19:27:45 GMT -5 RWA3006 said:

Find someone to blame it on and you'll feel better. I suggest jasoninsd would make a mighty fine scapegoat.

Wonder if they have any kind of warranty.

Last Edit: Mar 20, 2023 20:13:01 GMT -5 by jasoninsd

Favorite Quotes:
"It always seems impossible until it is done." - Nelson Mandela
"Life becomes easier when you learn to accept the apology you never got." - Robert Brault
"You can't wait until life isn't hard anymore before you decide to be happy." - Nightbirde (RIP 2/19/22)

My Etsy Shop: www.etsy.com/shop/MadBadgerLapidary

drocknut no longer being taken for granite I'd rather be rockhounding Member since December 2008 Posts: 8,197	My stupid expensive mistake Mar 27, 2023 10:46:55 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by drocknut on Mar 27, 2023 10:46:55 GMT -5 Wow that is definitely a costly boo boo
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Roger
fully equipped rock polisher

Member since January 2013
Posts: 1,487

My stupid expensive mistake Mar 27, 2023 15:51:10 GMT -5 hummingbirdstones likes this

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Post by Roger on Mar 27, 2023 15:51:10 GMT -5

I never had one come apart quite like that before either. I agree with some of the other comments that it is likely a bad cup. There was probably a micro-fracture or small void in it from the manufacturing process.

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