Harv
Member
Posts: 91
One Bad Motor Scooter
Des Moines, Iowa
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« on: July 16, 2015, 04:24:08 PM » |
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After finally getting my new exhaust on I was putting the crash bars back on and discovered I had a stripped hole in the frame and a buggered up bolt. I got the bolt repaired and went to re thread the hole. You guessed it I broke the tap off in the hole. Any suggestions or should I try to find a machine shop to get it out and re-tap the hole. Thanks for any suggestions.
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Harv  |
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art
Member
Posts: 2737
Grants Pass,Or
Grants Pass,Or
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« Reply #1 on: July 16, 2015, 04:46:00 PM » |
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Don't know how a machine shop would do it in the frame but having a good machinist look at it is a good idea. That is part of their expertise. Lot depends of the location of the hole an weather or not a machinist can get his tools there to work it out or machine it out. Some of the cutters to remove a broken tap are very hard and brittle and will break if not handled correctly. I have removed many broken taps and each one is different.
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98valk
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« Reply #2 on: July 16, 2015, 05:16:37 PM » |
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suggest u don't do anything else yourself. get a good machinist. a good one can do miracles.  |
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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Tfrank59
Member
Posts: 1364
'98 Tourer
Western Washington
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« Reply #3 on: July 16, 2015, 06:55:43 PM » |
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After finally getting my new exhaust on I was putting the crash bars back on and discovered I had a stripped hole in the frame and a buggered up bolt. I got the bolt repaired and went to re thread the hole. You guessed it I broke the tap off in the hole. Any suggestions or should I try to find a machine shop to get it out and re-tap the hole. Thanks for any suggestions.
Well I'm a machinist, but I'm in Washington  . What a machinist would probably do is either try and work the tap loose maybe try a tap extractor, or as a last resort break it up and take it out in pieces. Since it's on the bike using a hand drill motor with a carbide drill probably isn't an option. Is it a through hole, or a blind hole? I'm guessing since it's your crash bars it's a blind hole for the frame mount, and blind holes are more difficult to extract a broken tap from. I wish you luck my friend  |
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-Tom
Keep the rubber side down. USMC '78-'84
'98 Valkyrie, ‘02 VTX 1800, '96 Royal Star, '06 Drifter, '09 Bonneville, '10 KTM 530, '04 XR 650, '76 Bultaco, '81 CR 450, '78 GS 750...
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da prez
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« Reply #4 on: July 17, 2015, 05:38:58 AM » |
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Harv , a better explanation will help as in the previous post. I have removed many broken taps. They be shattered of torched out. I am sure someone will question this method tho. I will pm you my phone number if you want to talk about alternatives. Some explanations would be to long to post.
da prez
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signart
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« Reply #5 on: July 17, 2015, 06:01:24 AM » |
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How far below flush is it broken?
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Harv
Member
Posts: 91
One Bad Motor Scooter
Des Moines, Iowa
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« Reply #6 on: July 17, 2015, 08:26:33 AM » |
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Thanks everyone for your replies. Signart, a little bit (1/16" approx) is sticking out. Thanks for your offer Ross. It's guys like you who make this club so great! I already went ahead and took the bike to Wolfe Machinery, a local machine shop. I figured I had done enough damage.  |
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Harv |
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da prez
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« Reply #7 on: July 21, 2015, 04:07:21 PM » |
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Harv , did you get your bike back yet. Just being nosey. (bump)
da prez
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signart
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« Reply #8 on: July 21, 2015, 04:22:08 PM » |
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Thanks everyone for your replies. Signart, a little bit (1/16" approx) is sticking out. Thanks for your offer Ross. It's guys like you who make this club so great! I already went ahead and took the bike to Wolfe Machinery, a local machine shop. I figured I had done enough damage. That's good. Leaves the machinist a lot of options, no need for any of my suggestions. |
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Ricky-D
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« Reply #9 on: July 22, 2015, 06:42:58 AM » |
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Using a tap to repair buggered up threaded holes is not the thing to do and you know
what can happen as reported in this thread. They make special tools for repairing threaded
holes and they are called thread chasers. They are designed in a special configuration to
follow the original threads and not start cutting new threads. Naturally a bit of mechanical
ability is required to use these type tools.
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2000_Valkyrie_Interstate
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Harv
Member
Posts: 91
One Bad Motor Scooter
Des Moines, Iowa
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« Reply #10 on: July 22, 2015, 08:09:36 AM » |
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I did not know that, about the thread chaser. I used an IRWIN 8 mm - 1.25 High Carbon Steel Plug Tap. I have used this type before in similiar situations with no problem but next time I will use the proper tool, the thread chaser, that's for sure. Thanks for the info Ricky-D.
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Harv |
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Harv
Member
Posts: 91
One Bad Motor Scooter
Des Moines, Iowa
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« Reply #11 on: July 22, 2015, 08:14:34 AM » |
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Harv , did you get your bike back yet. Just being nosey. (bump)
da prez
Yes Da Prez, I got it back the same day. It took them less than an hour. They charged me $75, which I thought was reasonable. I got it back together and am really enjoying the quiet ride of the stock IS pipes over my Mark T exhaust ... at least for now!  |
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Harv |
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