OF 2200 partial corrosion

[CADru]

Just looking to see if another's have experienced same:

After noticing a slight indication of "rusting" at the shaft where it enters the router body I removed the black cover plate (image shows plate removed) to investigate further. Attached images show a slight corrosion in a couple areas. This router rarely leaves the shop and is usually always mounted in my CMS table. Shop space is a conditioned space. Last project was milling some PVC so I don't see it as a material moisture issue. I'm looking to understand what may have caused this, any ideas, not normal I assume.

 

[Crazyraceguy]

If it is in a table most of the time, that surface is pointed up. All of the dust/shavings would fall or be drawn there by the extractor. Any moisture from that would be opened up to this area, plus any natural moisture in the air too. As you said this area is not really open to the eye a lot, so time is working against you too. It could also have been there from day-one. Who knows how long it was in storage before you got it? Wipe it off, add some kind of corrosion inhibitor and keep going, it's not "damage".

 

[Chainring]

Besides the rust, is anyone seeing wear on that gear in the first picture? Sure looks like teeth have been worn down.

 

[squall_line]

Besides the rust, is anyone seeing wear on that gear in the first picture? Sure looks like teeth have been worn down.

Those are the teeth for the ratchet to lock and unlock the collet, correct?  I'd be much more concerned if they were drive teeth.  I'd imagine there's still plenty of bite left to open and close the collet.

That said, is it possible that the ratchet mechanism is stuck or wobbling under use and hitting the gear?

 

[guybo]

Hi, sometimes the plating is not great and copper is exposed (micro pits) creating a green rust bloom,as on the shaft by the snap ring and then bloomed on the raw metal, as was said clean it you are fine. btw that gear if it was hitting would not last long @10000 to20000 rpms. [smile] or the ratchet lock [smile]

 

[CADru]

Hi, sometimes the plating is not great and copper is exposed (micro pits) creating a green rust bloom,as on the shaft by the snap ring and then bloomed on the raw metal, as was said clean it you are fine. btw that gear if it was hitting would not last long @10000 to20000 rpms. [smile] or the ratchet lock [smile]

Agree with clean and move on, no major damage simply corrosion. Got it cleaned up and coated with some Ballistol. Was curious as to why as if touched with hands or high/excessive exposure to moisture. The corrosion was mostly on that side (shown in picture), not consistent across that snap ring and gear. Speaking of gear, others also mentioned the wear on the teeth. Same here but don't see that being from ratcheting wear, this is the only time that gear sees any action besides the springs on the ratcheting lever are stable and would not allow that thumb lever to "freely" contact the gear without having to engage it by hand. Another member made a mention of a condition possibly existing from day one as in "out of box". Maybe the condition of the gear existed "out of box". If those teeth were making contact during use I'm sure I'd notice that.

 

[Coen]

Some materials have only surface rusting, which seals the material.

Note that tools that rust tend to be stronger than those that dont. Stainless steel is weaker. You can see this with cutlery; forks and spoons of higher end cutlery are made of 18/10 stainless steel. But the knifes wouldn't last, so they are made of 18/0 stainless steel; stronger, attracted by magnets but a bit more prone to rust. Often packaged sealed when bought new.