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Plunge Router accident routs my workbench

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Forum topic by Tom8021 posted 02-26-2011 08:14 PM 1974 views 0 times favorited 12 replies Add to Favorites Watch
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Tom8021

73 posts in 2701 days


02-26-2011 08:14 PM

Topic tags/keywords: router

I have a Porter Cable 890 type 1 with an older style plunge base. I tighten the depth gauge knob as hard as I think it will go. After just a few plunges, it will plunge right through the work piece and into my work top! I am routing a shallow basin in 3/8 in pieces of wood. So it doesn’t take much to go through it. It is just frustrating and dangerous. Unfortunately my work top is also my router table and I went right into the aluminum track. I notice bits of metal and raise the router bit immediately.

I have emailed Porter Cable to see if this is a problem with this base. Has anyone else have this problem?


12 replies so far

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Loren

8302 posts in 3111 days


#1 posted 02-26-2011 08:28 PM

Your bit may be slipping in the collet. Spiral upcut mortising bits are
especially prone to slipping in the collet.

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Tom8021

73 posts in 2701 days


#2 posted 02-26-2011 08:31 PM

No I am using Dish cutting bit from MLCS 1” cutter with 1/2” shaft. It isn’t moving.

View Rick  Dennington's profile

Rick Dennington

5177 posts in 2657 days


#3 posted 02-26-2011 09:16 PM

Here’s what I’m thinking, and I may be way-off base on this one: Did you ” 0” out the router bit before starting? What I mean by that is, did you set the router on the work piece (being off, of course) and bring the router bit down to touch the piece? You then lock it down, and set your depth gauge to the desired depth you want the cut. Turn the appropiate stop to where the depth gauge will bottom out. Lock the depth gauge with the knob, and release the plunge lever and let the router bit go back up. Your depth is now set for the depth of cut. Now when you start routing and when it gets to the right depth, it will bottom out on the stop. If you set it right, it’ll make the same depth cut every time…..Hope I didn’t confuse you..now I’m confused…...lol.

-- At my age, an "all--nighter" is not having to get up and pee...!!!

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Tom8021

73 posts in 2701 days


#4 posted 02-26-2011 09:30 PM

The bit I am using is a pattern bit bearing on the top. The bottom line is that I can rout several pieces of wood at the correct depth, then if I forget to check the tightness of the depth gauge and plow through the next piece. So, the depth is right. It is the action of the plunge hitting the stop that seems to be loosening up. The porter Cable model I have has a swivel type stop so that you can make your cuts in steps without resetting your final depth. I don’t use that feature on this project, I am only cutting about 1/8” deep total . Because the stop rotates the tightener is “funky”? Hard to tighten.
Does anyone else have this issue?

View teejk's profile

teejk

1215 posts in 2148 days


#5 posted 02-27-2011 11:07 PM

I have recently seen the same problem with mine in the 690 series. the lock-bolt doesn’t seem to want to lock onto the depth rod. I think it is the plastic wing spinning on the threads (i.e. it is not a problem with the female threads in the housing or the male threads on the bolt). from what I can see it is simply steel going into plastic without the brass insert that one sees on many tools.

if it ever warms up here I’ll confirm and try some epoxy. otherwise time for a new plunge router I guess.

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Tom8021

73 posts in 2701 days


#6 posted 02-28-2011 12:48 AM

I think you are right. I emailed Porter Cable but I haven’t received an answer back (just been a day ago). If I get any info, I’ll post it.

View Vicki's profile

Vicki

1043 posts in 2807 days


#7 posted 02-28-2011 07:51 AM

I Googled the problem and there’s some good info here:

http://lumberjocks.com/topics/23343

-- Vicki on the Eastern Shore of MD

View Greedo's profile

Greedo

470 posts in 2423 days


#8 posted 02-28-2011 01:57 PM

welcome to the “i routed into my workbench by accident” club!

View BobG's profile

BobG

172 posts in 2425 days


#9 posted 02-28-2011 02:39 PM

I did that. Made a real mess, so much of a one, I’m still mad at myself for being so dumb! This was my fault. Hope you find the solution or sell the router on Ebay.

-- BobG, Lowell, Arkansas--------My goal in life is to be the kind of person my dog thinks I am! Make more saw dust!!

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Tom8021

73 posts in 2701 days


#10 posted 03-03-2011 12:12 AM

Here is the response:

“I am sorry but, in order to help you I suggest you take the complete machine to the factory service center. They will inspect the machine and determine how to assist you in this mater.”

I guess they don’t think it is an issue? I do have a service center sort of close by (20 Miles) . I ‘ll try to get in there one of these days and see what if anything they have to say.

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Tom8021

73 posts in 2701 days


#11 posted 03-03-2011 12:37 AM

Here is the response:

“I am sorry but, in order to help you I suggest you take the complete machine to the factory service center. They will inspect the machine and determine how to assist you in this mater.”

I guess they don’t think it is an issue? I do have a service center sort of close by (20 Miles) . I ‘ll try to get in there one of these days and see what if anything they have to say.

View mainwoodworks's profile

mainwoodworks

112 posts in 2111 days


#12 posted 03-05-2011 09:51 PM

I too have had the same problem. The screw that holds the depth guage has backed out on me more than a few times. I am thinking of useing locktite on it. I have learned to look at the depth rod and screw before I plunge. It is a hassel but it is better than going to deep. Once I am at the depth I have not had any problems. If you come up with a solution let us all know.

-- Measure twice, cut once, and hope for the best.

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