01-08-2015, 05:06 PM | #1 |
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Prussian blue
Can anyone explain how to use Prussian blue? tia
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01-08-2015, 05:18 PM | #2 |
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Re: Prussian blue
Use a small brush, such as the small flat acid brush plumbers use, then wipe a thin coating on the gear teeth. Turn the driving gear back and forth so it wipes across the blue and shows a pattern of contact. You want to see the pattern on the drive side of the teeth, and on the coast side of the teeth. Old Motors Manuals have a section showing how to read the patterns.
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01-08-2015, 05:30 PM | #3 |
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Re: Prussian blue
Prussian blue can be used in just about any machining/checking operation.
Its lightly brushed on and filed, milled, ground or worn off to show contact/noncontact area. In most automotive stuff I find it tedious. To check tooth contact I use white grease and to check valve face/seat contact I use pencil. These are far easier to remove for recheck after adjustment. But, the blue is fine if thats what you chose. |
01-08-2015, 05:37 PM | #4 |
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Re: Prussian blue
In the shops I used to work in, it was mostly used to play jokes on guys. A little dab on the back side of a knob of his machine and after a while he was blue all over and mad as hell.
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01-08-2015, 05:38 PM | #5 |
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Re: Prussian blue
I've used blue, but I like black magic marker better on gearing.
Joe K
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01-08-2015, 05:53 PM | #6 |
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Re: Prussian blue
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01-08-2015, 06:30 PM | #7 |
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Re: Prussian blue
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01-08-2015, 06:37 PM | #8 |
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Re: Prussian blue
Commode handles or the front lip of the seat, too.
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01-08-2015, 08:20 PM | #9 |
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Re: Prussian blue
You guys had too much fun
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01-08-2015, 09:04 PM | #10 |
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Re: Prussian blue
I use Dykem as it is a fast drying liquid. Not as messy as blue and wipes off with a little solvent. Rod
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01-08-2015, 11:55 PM | #11 |
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Re: Prussian blue
Anyone ever use it to check engine bearing contact?
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01-08-2015, 11:59 PM | #12 |
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Re: Prussian blue
Yes, it shows amount of contact or voids
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01-09-2015, 12:55 AM | #13 |
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Re: Prussian blue
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01-09-2015, 02:21 AM | #14 |
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Re: Prussian blue
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01-09-2015, 06:38 AM | #15 |
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Re: Prussian blue
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01-09-2015, 09:48 AM | #16 |
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Re: Prussian blue
Dykem is a great layout fluid but it is actually too thick for a high spot "paint".
It tends to flake off or bunch up in tight (Say, .001 clearance) places. Prussion High spot blue must be nearly all wiped off to avoid having an indication of a contact where none exists. It must be thinly applied. Terry |
01-09-2015, 10:25 AM | #17 |
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Re: Prussian blue
It has never caused me a problem as long as it is cleaned off and re-applied between checks if adjustment is needed. Rod
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01-09-2015, 12:10 PM | #18 |
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Re: Prussian blue
Bluing was commonly used to layout parts on sheet metal using a scratching awl and to check contact between rubbing surfaces.
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01-09-2015, 02:52 PM | #19 |
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Re: Prussian blue
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01-09-2015, 06:24 PM | #20 |
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Re: Prussian blue
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