Bad movement help

RobertK

post tenebras lux
Gold Member
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Dec 1, 2010
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By far the best snap I have it on my cheap delrin bullnose. I've used this thing on everything, from apples to drywall, and the open and close snap is stiff and pleasant.

My classier 77 was smooth, but not as nice as the bullnose, but they all vary so much. Last Sunday I was fiddling with it and it was a little rough and gritty and wasn't really snapping open or closed. This one usually only cuts nail and tags off clothing. Real hardcore stuff. ;)

So I tried cleaning it out. Soap and water and moving it around. I then dried it and oiled it. It snaps a lot more now but it still feels very gritty. I'm assuming it's just dirty from (something)? But I'm at a loss for how o clean it more or better.
 
Very well could be a meal shaving.

I've had one ruin the action till I got it out.

I've had several brands do this.
 
Soap and warm water, dry, rubbing alcohol, WD40, repeat. Mix in some air in a can during the drying stage. I would continue to repeat this cycle until I got the desired result.
 
If the handle material isn't too classy, I would tie it in a sock and throw it in the laundry. Maybe not in the same load with underwear, if metal filings are suspected.
 
So I tried cleaning it out. Soap and water and moving it around. I then dried it and oiled it. It snaps a lot more now but it still feels very gritty. I'm assuming it's just dirty from (something)? But I'm at a loss for how o clean it more or better.

soap and water in a shallow pan.
work the blades in the soapy water.
use an old tooth brush to brush out the pivot area from all directions.
repeat for multiple stages of opening the blade (1/4 open, 1/2 open, 3/4 open, full open)
be sure to brush/clean the sides of the protruding spring at each stage.
Swish it around in the soapy water at each stage.
Dump the soapy water out replace with hot clean water and swish around at each stage to rinse.
Use the brush again with clean water if you want (can't hurt).
Dump out the water and hand dry the best you can, clean lint-less towel, at each stage.
Put the knife in the empty pan and douse it with WD-40.
Brush the pivot with WD-40 at each stage and work the blades.
Use compressed air to blow out the WD-40.
Let it air dry for an hour.
Mineral oil the knife.
Work the blades occasionally over 15 minutes.
take a hard cotton swab into the pivot areas after the working in the oil.
Add more clean oil and dab off the excess.
 
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