how to unseize

[sunnybob]

In all those tools I got recently was a bosch POF50 router with plunge base.

Problem is the base is well and truly plunged.
Its been left fixed down to its lowest point for god knows how many years. The 2 steel plunge bars go through an alloy plate that holds the router.
One of the bars is seized solid inside the alloy.
Ive tried wd40, large hammer blows, blowtorch heat, and combinations of all three all to no avail.
I need to get sneaky or else this alloy will just break.
Help please.

 

[otter]

Galvanic corrosion


Buggered.


In the bin.

 

[Racers]

Get some proper penetrating oil plusgas etc and apply it to the router and wait, if you can apply a little pressure with a wedge that might help things to move.

Pete

 

[sunnybob]

Its apart.
All I have now is wd40 and the shops are all closed.

I'm afraid I resorted to what I know best.
If a big hammer doesnt work, get a BIGGER one.

Had to hammer the rod out through the base, then I could hammer the rod back and fore repeatedly untill it seperated.
All I have to do now is straighten the alloy base plate.

It wont be good enough for sign routing, but it will do any general stuff.

 

[Jacob]

Ali and steel end up tightly bonded. I recently had to dissolve a seat post and stem from a bike frame, using caustic soda. It worked, but slowly with a lot of recharges of caustic. Even the last few flakes were tightly stuck.

 

[sunnybob]

Once apart, you can see that the iron has corroded, not the alloy. Even the depth stop screw had corroded bad enough I barely got the plastic nuts off. Had to re tap the thread using an old metal nut.
Just washed everything in strong washing up liquid solution, its in the sun drying now, then a liberal wd 40 before reassembly should last another 10 years.
the base has deformed slightly under the stress of my administrations, but I've got it almost back to flat, at least good enough for any general work.
If I could have bought new I would have, but its obsolete, so a wonky router is better than no router.

 

[MusicMan]

The best penetrating oil in my experience is Ballistol. You can get it on Amazon. Developed for the German Army in the early 1900s to be compatible with metal, wood, leather and skin!

Keith

 

[Jacob]

Once apart, you can see that the iron has corroded, not the alloy. ......

Tother way round with my bike frame - the steel is now as clean as a whistle it was the alloy which deteriorated