Looks like some sort of heat sink. I'm going to guess for electrical equipment.
Looks like some sort of heat sink. I'm going to guess for electrical equipment.
It looks like something would diffuse air in a radial direction.
Why I know what that is...
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It’s my big ten inch…record of a band that plays the blues.
Okay, well, I'm not about to let all this brainpower go to waste for want of another photo or two. Here's the backside. It looks like someone actually hit it briefly with an orbital sander in a few places.
This pic without the ruler. I wonder if google still sees eyelashes?
I’m becoming suspicious that you’re pulling our legs.
Fin side shows two relatively large holes (likely for wiring to pass through) at the twelve and four o-clock positions and yet the back side only shows one such hole. Also, the six holes nearest the parameter are inset about 1/8 of the radius on the fin side but are almost at the edge of the back side.
poopshovel again said:I’m thinking it’s stationary and a fan mounts to it, no?
EDIT for clarity: I think the curved fins suggest that this part moves, but I'm not sure how strongly it suggests it. I guess if air was being blown through a case and diffused by it, the curve might be a way to add a little extra area per fin, and maybe there's a benefit to sending the air out at an angle, or with some swirl, in terms of airflow?
Ransom said:poopshovel again said:I’m thinking it’s stationary and a fan mounts to it, no?
EDIT for clarity: I think the curved fins suggest that this part moves, but I'm not sure how strongly it suggests it. I guess if air was being blown through a case and diffused by it, the curve might be a way to add a little extra area per fin, and maybe there's a benefit to sending the air out at an angle, or with some swirl, in terms of airflow?
Agreed, also notice that the fins terminate in a radius at the center but terminate in a right angle at the perimeter…air definitely enters at the center and radiates outward although it may be swirling to begin with rather than being swirled by this component.
RX Reven' said:I’m becoming suspicious that you’re pulling our legs.
Fin side shows two relatively large holes (likely for wiring to pass through) at the twelve and four o-clock positions and yet the back side only shows one such hole. Also, the six holes nearest the parameter are inset about 1/8 of the radius on the fin side but are almost at the edge of the back side.
The small holes at the edge on the backside are for mounting through the housing that this attaches to, but don't go all the way through. I originally thought guide pins, but OP states these are threaded. Same for the three small holes dead center on the back side that are in a straight line.
The large hole at the 4 o'clock position appears to line up with a small hole on the back side, could still be for wiring to pass through, perhaps with a connector that fits into the large hole.
My guess is this is mated to an electric motor, and that a cooling fan, if equipped, would mount to the top side using the 4 larger diameter regularly spaced holes, making the fins function to move air across the surface evenly to prevent warpage.
Makes an excellent ruler holder though.
Piece to an industrial clutch assembly? Or if the tall standoffs could mount blades maybe its the heatsinky center for an electric fan motor shaft. Like a casino size air conditioning fan.
Oh wait there's no center hole on the back.
Hi EastCoastMoJo,
Good points about the guide pins but the large holes appear to have a constant diameter as I think I’m seeing carpet texture fill both holes.
In reply to RX Reven' :
I can't see carpet in the 4 o'clock hole, but I can only zoon in so much on my phone. No CSI level zoom for me.
It appears to be a heatsink for a 10 inch LED downlight.
...Well that's my best guess.
EastCoastMojo said:RX Reven' said:I’m becoming suspicious that you’re pulling our legs.
Fin side shows two relatively large holes (likely for wiring to pass through) at the twelve and four o-clock positions and yet the back side only shows one such hole. Also, the six holes nearest the parameter are inset about 1/8 of the radius on the fin side but are almost at the edge of the back side.
The small holes at the edge on the backside are for mounting through the housing that this attaches to, but don't go all the way through. Same for the three small holes dead center on the back side that are in a straight line. The large hole at the 4 o'clock position appears to line up with a small hole on the back side, could still be for wiring to pass through, perhaps with a connector that fits into the large hole.
Thanks ECM!
There is only one through hole (one of the big ones). All the other holes are blind holes with tapped threads. Except, the through hole has a twin, but it doesn't actually go through.
Okay, last pic. Shows a little more depth, shot more from the edge instead of straight on.
"Air bearing heat exchanger" is the closest I can get to anything that looks like that danger frisbee
Unfortunately the website that hosts this pic requires a login to view any additional details.
It looks like it costs $19.95. And if I'm correct, you'll double my order.
This is a Friday exercise, and Friday ends in 19 minutes... here at least.
Other than danger frisbees they should melt down in a foundry quite nice.
In reply to 1988RedT2 :
If you rotated the backside pic so the pass-thru was at 12-o'clock, you'd see that it does indeed have y-axis symmetry.
In reply to AngryCorvair :
You are correct, sir! Thanks for pointing that out.
Cooling fan for an air cooled engine(a-la Briggs and Stratton)?
Nope, 
AngryCorvair said:In reply to 1988RedT2 :
If you rotated the backside pic so the pass-thru was at 12-o'clock, you'd see that it does indeed have y-axis symmetry.
I have to disagree. My phone unfortunately cropped the photo when I rotated it, but you can still see that the inner circle holes are not symmetrical left to right. The spacing is off.
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