Table- Lift Adjustments w/ Plunge Router - Router Forums
 
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post #1 of 5 (permalink) Old 06-11-2012, 03:49 AM Thread Starter
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Default Table- Lift Adjustments w/ Plunge Router

I'm having two annoyances with one of my 3 router tables.

This router table has a cheap/sacrifice 2.5HP plunge router. When the router is out of the table and in normal orientation, the plunge springs are a bit stiff. When in the table (inverted), when adjusting lift, it is stiffer. Adjusting seems to be a lots of effort on the adjustment knob. Occasionally the offside plunge shaft binds/locks until I give it a hard slap with my hand. (To free it up)

Sometimes I take the plunge springs out and this seems to work, but I do worry about the router lifting, as without any springs, there's nothing to stop it from lifting except that router weights 17 pounds. I don't really know that this fear is really valid as normally the router plate just sits down in it's landing and is not screwed down or secured in any way.

Do you think cutting some coils off the springs or replacing them with weaker springs would help/correct these two problems?
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post #2 of 5 (permalink) Old 06-11-2012, 07:02 AM
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Originally Posted by MAFoElffen View Post
I'm having two annoyances with one of my 3 router tables.

This router table has a cheap/sacrifice 2.5HP plunge router. When the router is out of the table and in normal orientation, the plunge springs are a bit stiff. When in the table (inverted), when adjusting lift, it is stiffer. Adjusting seems to be a lots of effort on the adjustment knob. Occasionally the offside plunge shaft binds/locks until I give it a hard slap with my hand. (To free it up)

Sometimes I take the plunge springs out and this seems to work, but I do worry about the router lifting, as without any springs, there's nothing to stop it from lifting except that router weights 17 pounds. I don't really know that this fear is really valid as normally the router plate just sits down in it's landing and is not screwed down or secured in any way.

Do you think cutting some coils off the springs or replacing them with weaker springs would help/correct these two problems?
Hi Mike - I think that most remove the springs from a plunge router when table mounting. Just for the reasons you stated. I seriously doubt a 17# router is going to climb the guide shafts. Also, most bit profiles will tend to push the router back down. The obvious profile that will try to pull the router up is a large dovetail bit and, to a lesser extent, an upcut spiral.

John Schaben

The problem with experience is I usually get it immediately after I need it.
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post #3 of 5 (permalink) Old 06-11-2012, 07:44 PM
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I have discovered that STP oil treatment ( a few dollars in an auto parts store) works wonders on gears and other lubrication needing tools. It stays where you put it as it is so viscous and boy does it lubricate. Try it and see if the router lifter will work like it was brand new.
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post #4 of 5 (permalink) Old 06-14-2012, 06:03 AM
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I agree with the suggestion about removing the plunge spring when the unit is inverted, if the router weighs 17 pounds, the rise and fall components (everything except the the base and columns, would be in the order of 14 pounds, so to provide positive lift at the end of a cut the springs would be rated at around 20 pound.

Inverted this means that the raising mechanism has to cope with about 20 lbs from the spring and 14 pounds from the rise and fall components, so is working much harder. Without the spring, the unit should be easier to raise than it would be to plunge operating upright with the spring.

There should be a plunge lock at the column somewhere near the handles to lock the height when plunging. Use it to lock the height once you have adjusted it for table use.

If the head is skewing on the columns and jamming, check if there is dust trapped between the column and the far end of the motor housing. This can cause the motor to skew on the column.
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post #5 of 5 (permalink) Old 06-14-2012, 06:59 AM
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While STP is a great lubricant it would also attract dust and dirt. A dry lube is a better choice in this application. Binding is most often caused by dust accumulation but could also be an alignment problem.

Mike
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