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What To Do When "Grabit" Fails?
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SpromoSapiens
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SpromoSapiens
Joined: 26 Feb 2010
Posts: 102
Location: Boise ID
Expertise: I live coffee

Espresso: Riviera Eagle, '91 Livietta,...
Grinder: Vario, KA ProLine, Sozen...
Drip: Clever, V60
Roaster: Behmor 1600
Posted Mon Oct 1, 2012, 5:19pm
Subject: What To Do When "Grabit" Fails?
 

Ay yay yay, this grinder's driving me nuts. I wanted to swap out the burrs for a new set but of course the screws were super stuck; I posted here for counsel regarding food-safe penetrating oils to help get them going, and I do appreciate the info & entertainment. :) In the end it was easier to find a manual impact driver, although I was considering using both. Now I wish I had!

The impact driver proved to be worth every penny of its mere $20. Thanks, Wayne, for that tip -- I'm happy to have it, and it did great, but not great enough. It helped me knock 5 out of 6 screws right outta there, but the sixth was awfully stubborn. I then went for the ol' "Grabit" screw extractor, which has never failed before but which I was too concerned about damaging the burr carrier to use right off the bat. Emboldened by my impact driver success, I started working on the stuck slotted screw with the Grabit, but no dice! I'm just wearing down the head without making any kind of tread for the grabbing side of the bit to grab.

If the head of this screw is worn totally away -- am I then the one that is screwed?
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,722
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Oct 2, 2012, 8:15am
Subject: Re: What To Do When "Grabit" Fails?
 

You are now into "advanced screw removal" LOL!

Sorry about the troubles and  I am glad that the impact driver helped.

The next step is to drill out the center of the screw so that a screw extractor can be inserted and you might get it to work. These look like a screw that you turn the other way, they screw down into the hole you drilled and as they get tight in the same way the screw loosens, it will unscrew the stub of the screw. I have about 50% luck with them. After that, it is drill out all of what is left, the hole is drilled out larger and a threaded insert is installed, not for the faint of heart and it helps if you have done it before.

Click Here (www.lowes.com)

These are hardened steel and as such, they can be easily broken and these can not be drilled out as they are as hard or harder than the drill bit so caution and taking your time is advised.

Screw extractors are for removing broken screws, not really stuck ones so ........ good luck!

It might be time to think about having a "pro" do the work, just something to think about.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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mavrick1903
Senior Member


Joined: 17 Mar 2011
Posts: 75
Location: Madison WI
Expertise: I love coffee

Espresso: Isomac Relax
Grinder: Nuova Simonelli MCF
Posted Tue Oct 2, 2012, 8:53am
Subject: Re: What To Do When "Grabit" Fails?
 

If you can drill the screw down to where the head meets the shaft, you might be able to remove the stubborn part, exposing a portion of the shaft. with luck, the reduced tension may also allow for backing the screw shaft out. I've had luck with this technique in the past (not on a grinder, but principal is the same).
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