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Forum topic by ctc posted 11-25-2008 12:06 AM 1155 views 0 times favorited 7 replies Add to Favorites Watch
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ctc

11 posts in 3674 days


11-25-2008 12:06 AM

Can anyone suggest why I have burned up (or at least broken) two router bit guides for my Rockler dovetail jig. I tried to follow the instructions carefully.
Thanks,
C.T.


7 replies so far

View Julian's profile

Julian

880 posts in 3605 days


#1 posted 11-25-2008 01:21 AM

You must be pushing pretty hard to break the bits. I’ve had the rockler dovetail set for a few years, and have never even had to replace the bits.

-- Julian, Park Forest, IL

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Bob #2

3809 posts in 4101 days


#2 posted 11-25-2008 01:32 AM

What do you mean by “two router bit guides ”?
Can you give us a picture?
Have you a book or instruction manual that you could refer to.

Bob

-- A mind, like a home, is furnished by its owner

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ctc

11 posts in 3674 days


#3 posted 11-25-2008 03:58 AM

No, no, no….....I didn’t break the bit…....it was the guide bushing. The little tit that follows the jig. It broke, or melted, or something…...thereby allowing the bit to bite into the jig. This only happened after I had done three pieces of my jewelry box….....

Is it an alignment problem ?
C.T.

View John Ormsby's profile

John Ormsby

1288 posts in 3816 days


#4 posted 11-25-2008 04:21 AM

The guide bushing on the router should not be touching the router bit or or bit shaft. You must put the guide on the base of the router and tighten the lock nut. Then install the bit. the router bit shaft must be long enough to be able to clear the bottom of the guide bushing. Is the bushing spinning? It should not be spinning. If so, you have a problem. The guide is just supposed to rub on the dovetail template guides.
Also, the guide bushing tip may also be too long. There are long ones and short ones. You may have to use a short one. Take a look at your guide bushing kit and see if you have the short version. It might solve the problem about being able to install a shorter shank dovetail router bit.

-- Oldworld, Fair Oaks, Ca

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ctc

11 posts in 3674 days


#5 posted 11-25-2008 04:44 PM

Yep, Bentlyj, that is the very guide bushing. The guide seemed to be working fine for three pieces of the box I was building, then it started smoking and by the time I had stopped the jig was ruined. About 2/3rds of the guide was gone and the bit was eating into the jig. The only thing I can imagine is that I was pushing the work too fast and in forcing the bit around the jig pushed too hard, it got hot and brittle and broke. Next time I’ll take more time.
Thanks for your input.
C.T.

View lew's profile

lew

12204 posts in 3834 days


#6 posted 11-25-2008 04:58 PM

Is it possible that the “lock nut”, holding the bushing in place, is vibrating loose and allowing the bushing to drop down onto the spinning bit?

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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ctc

11 posts in 3674 days


#7 posted 11-25-2008 09:02 PM

Yeah, that started happening. I noticed that the lock nut was vibrating and slowly rotating loose. So, I stopped and tightened it using pliars so it didn’t happen again.
C.T.

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