today's work

[He Who Shall Not Be Named]

Is that ferric chloride " the acid " to use for etching prior to painting or just your favorite. I used sandblasting metal parts in the past, yet my small sandblaster ( dental tech) is insufficiant for larger pieces

Jörg

Chemical machining is acid-etching is rapid oxidation of the metal. I acid treat all copper bearing alloys and aluminum to microscopically pit the metals surface which acts to increase the surface area of the work and to provide 'tooth' so that primer will bond better to it.

Yes, when I photo-etch I use Ferric Chloride acid, heated and agitated. To prepare surfaces for primer I simply brush the stuff on till the oxides form (a darker color than the metal), rinse the work in fresh water, scrubbing off the acid, followed by a dunking in fresh water doped with baking soda.

[JHapprich]

Thank you. I just ordered it!

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

[DrSchmidt]

Awesome...I need a lathe.

[JHapprich]

Yup.what he says...

[He Who Shall Not Be Named]

Awesome...I need a lathe.

In the absence of a lathe -- and the semi-permanent foot-print it takes in your shop, here's a viable alternative:

[redboat219]

In the absence of a lathe -- and the semi-permanent foot-print it takes in your shop, here's a viable alternative:

I know the number 5,6,8 are blade indexing guides for those specific bladed prop but what are the numbers 36 and 48 for?

[He Who Shall Not Be Named]

I know the number 5,6,8 are blade indexing guides for those specific bladed prop but what are the numbers 36 and 48 for?

****! I don't know! Crap comes into my head and the hands obey -- I'm often left out of that loop.

For example, I got up from my hedious nap late afternoon ready to work and found that I had already uploaded some shop photos of today's work... I don't remember that!

And sometimes I can hear Ellie in some dark corner giggling and shaking her head at me when I make a dumb move in the shop.

Gett'n old is a roller-coaster ride. Long as I don't **** the bed, I'm good with it!

36, 48... I don't have a clue (lottery numbers?)

[redboat219]

Ran it throught Google Gemini-

For a propeller template, the most straightforward and contextually relevant interpretation is that 36^\circ and 48^\circ are specific propeller pitch angles that the tool is designed to set or measure. 36^\circ: A finer (lower) pitch setting.
48^\circ: A coarser (higher) pitch setting.

The other numbers (5, 6, 8) are for indexing based on the number of blades.