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Tool Talk Discussion Forum

broke off drive in zerk fitting

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bil b va

11-25-2006 14:41:37




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i have a couple of broke off 3/16 drive in zerk fittings i need to replace . whats the best procedure ? drill out ? i have the part diassembled . can i just drive them on through ? don't want to damage the hole and not be able to install new ones .




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vally farm

11-26-2006 07:04:54




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 Re: broke off drive in zerk fitting in reply to bil b va, 11-25-2006 14:41:37  
If you can find reverse twist drill bits, use them to grill out for the easy-out. 99% of the time they will back out what you are working on, be it a bolt, stud, grease zerk, etc. Mike



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Charles (in GA)

11-25-2006 20:19:23




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 Re: broke off drive in zerk fitting in reply to bil b va, 11-25-2006 14:41:37  
I have to remove these things at work ocassionally, commonly used in airplane landing gears, where they cannot thread the hole, as the threads would cause a stress riser and a crack would form.

Drive in fittings are aluminum and barbed. No kind of ezz-out will get them out, there are no threads to back them out of. If the part is steel and is open all the way thru, take a punch and drive it thru, th aluminum fitting will not hurt it. If it is a blind hole, use a sheet metal screw and thread into the remains of it and use the screw to pull it out. Do not hit the new one with a hammer, it will ding the head of it and the grease gun won't seal on it and you'll have grease everywhere. Use a 1/4 drive deep socket that will just slip over the head of it and seat on the flange of the fitting and drive on this.

Charles

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Don-Wi

11-25-2006 16:12:43




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 Re: broke off drive in zerk fitting in reply to bil b va, 11-25-2006 14:41:37  
If it's already a through hole and it's off, you should be able to pound it through. Then I'd look at drilling and tapping it for a 1/4-28 threaded zerk instead. Of course, there's nothing wrong w/ a drive-in type as long as they all take grease....

Donovan from Wisconsin



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JOHN HARMON

11-25-2006 15:00:45




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 Re: broke off drive in zerk fitting in reply to bil b va, 11-25-2006 14:41:37  
I use a square tapered "Ez-out" that I got at Farm and Fleet if I remember right. Most Tool Supply Houses have round EZ-Outs which are spiral and will not remove a drive in zerk base in my experience. Just tap it in slightly and it will tighten as you turn it with a wrench.



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