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post #1 of 30 (permalink) Old 03-31-2009, 11:25 AM Thread Starter
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Default stripped the threads out on my router base

while trying to find the right length of bolts to mount my router to the table i accidentally stripped the threads out on one of the holes. i figure i can drill and tap some new threads in that hole or go ahead and do all the holes. what type threads should i tap? should i go bigger? its a dewalt 618 router. its supposed to have the M4 metric threads but 8-32 seemed to thread just fine. only reason i messed it up is i cut one of the bolts shorter on my bench grinder and i guess i threaded it in wrong. i was thinking of going to 10-24 threads but wanted to see what you guys think
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post #2 of 30 (permalink) Old 03-31-2009, 11:43 AM
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Hello Mike, sorry that that happened. Drilling and taping is about the easiest. make sure that you have enough material to hold it. You can also get metric tap and go that route.

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post #3 of 30 (permalink) Old 03-31-2009, 12:12 PM
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HI Mike

Just my 2 cents

10-24 will be just fine if fact it's better than what is was..but do all the holes...no just one..Then pickup some Allen bolts from ACE hardware and replace them all..the Allen screws will have a smaller OD on the head size so you should not need to rework the plate.. ( counter sink holes)


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while trying to find the right length of bolts to mount my router to the table i accidentally stripped the threads out on one of the holes. i figure i can drill and tap some new threads in that hole or go ahead and do all the holes. what type threads should i tap? should i go bigger? its a dewalt 618 router. its supposed to have the M4 metric threads but 8-32 seemed to thread just fine. only reason i messed it up is i cut one of the bolts shorter on my bench grinder and i guess i threaded it in wrong. i was thinking of going to 10-24 threads but wanted to see what you guys think



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post #4 of 30 (permalink) Old 03-31-2009, 12:44 PM
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I will not go 10-24 because that is a course type thread.

You need a fine type thread either metric or imperial.

Fine type threads do not get loose easily and that's why equipment subject to vibration have fine type threads.

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post #5 of 30 (permalink) Old 03-31-2009, 12:55 PM
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Hi Nicolas

I will need to disagree with you on that one,, most of the router bases are Alum.the norm...and the course thread will not strip and easy...the threads are just cut a little bit deeper ...and you have more meat to hold on to..so to say..

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I will not go 10-24 because that is a course type thread.

You need a fine type thread either metric or imperial.

Fine type threads do not get loose easily and that's why equipment subject to vibration have fine type threads.

Nicolas



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post #6 of 30 (permalink) Old 03-31-2009, 06:00 PM
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Quote:
Originally Posted by Mike Gager View Post
while trying to find the right length of bolts to mount my router to the table i accidentally stripped the threads out on one of the holes. i figure i can drill and tap some new threads in that hole or go ahead and do all the holes. what type threads should i tap? should i go bigger? its a dewalt 618 router. its supposed to have the M4 metric threads but 8-32 seemed to thread just fine. only reason i messed it up is i cut one of the bolts shorter on my bench grinder and i guess i threaded it in wrong. i was thinking of going to 10-24 threads but wanted to see what you guys think
Don't change the thread size or form. Go to your engineer and get him to insert a Helicoil. They are a stainless thread insert which after tapping out the stripped hole with a special tap the insert is threaded in, restoring the thread to original size for very small cost

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post #7 of 30 (permalink) Old 03-31-2009, 06:08 PM
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HI Murray

65.00 USA dollars to put a screw back in place, he could almost buy a new base for that..

M4 metric Helicoil repair kit ,I have many Heli-Coil kits and they are not cheap..

Amazon.com: M4 X .70 Time-Sert Thread Repair Kit: Your Store

http://www.amazon.com/Heli-Coil-Thre...8537399&sr=1-2


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Last edited by bobj3; 03-31-2009 at 06:11 PM.
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post #8 of 30 (permalink) Old 03-31-2009, 07:59 PM
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Hi,

Either re-thread it to 10-24, 10-32 or metric. Spending a few dollars for new screws is cheap compared to having a repair shop do it for you.

Ken

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post #9 of 30 (permalink) Old 04-01-2009, 12:17 AM
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Another thing I did not know bobj

As always, you are right on

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post #10 of 30 (permalink) Old 04-03-2009, 12:40 AM
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you should be able to just tap the 8-32 stripped hole with a 10-32 tap, without drilling
what threads that are left in the hole will help to "lead" the tap as it has the same number of threads per inch
btw, a #10 screw is only 0.026" larger than a #8

the most common size in router bases (which all are die cast aluminum) is 10-32
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