Precision Angle plate & V-block

[mklotz]

I was suggesting that once X is defined by someone, not me, its definition could be used to deduce, via geometry, the largest diameter that would be consistent with that value of X.

I'm not proposing that what I wrote is the correct (or only) way to specify cylinder size for a V block, just that it's a possible one.

[DIYSwede]

Marv, I wasn't picking - merely trying to state a formula for establishing the max dia to sit in the V,
rather than to ride its edges.
Then - I jokingly stated what's needed to establish the angle.

Admitted - late here in Stockholm, I gotta get some sleep too.

-'Night, Gentlemen!

[DIYSwede]

Yet another (hopefully humoristic) slight detour from the topic of this thread,
I want to share Example 7, "Solving Right Triangles" from the following:

https://opencurriculum.org/5483/appl...ht-triangles/:



"The machine tool diagram on the right shows a symmetric V-block,
in which one circular roller sits on top of a smaller circular roller.
Each roller touches both slanted sides of the V-block.
Find the diameter d of the large roller, given the information in the diagram."

Theoretical engineering at its best! Data given is assuming the following:
First: Just make the rollers such that they only have an infinitesimally thin line of contact between each other,
while both having same against the V-groove's sides (Piece of cake...)
Next: Measure the distance between the two roller's contact points at the V-groove,
where its included angle is 74 degrees...

Reminds me of similar phrases from my books some 40 years back:
"Omit friction, aerodynamic loads and the beam's own weight in your calculations."

[Toolmaker51]

Theoretical engineering! The operative scope of Unlimited Resources, like an infinite diameter range of gauge pins.
Suggested method by percentage looking better all the time...measure width, know 1/2 the included angle, get the sine.
Occurs to me, while two contacting pins quite hard to determine, two decent size cylinders measured separately would achieve result easily.
But then; it's 0145 Pacific Time...

[DIYSwede]

On-topic now, just a refresh of Doug's excellent and beautiful build from 2 years ago:

V Step Angle Plate

Question unrelated to the above link:
-All you users of these angle plates, how do you keep all those screw holes, t-slots and undercuts clean,
as not to bring grinding dust or other Schmutz to your meticulously cleaned surface plates and mag chucks?

Tips welcome, as always.

Odd-ball line of thought:
-I remember spraying shaving foam into the coolant channels when refitting auto engine heads waaay back-
as I didn't want any eventual remaining debris from them to drop into the refurbished cylinders.
Good enuff to hold the stuff in during refit, then drying up into nothing overnite.
A final blast of air thru the channels would show up nothing, but better safe than sorry.