I am in the process of cleaning my engine and hogshead. I noticed as the grease and grim is removed, it looks like the hogshead is brass or bronze. What am I seeing? The engine is a 1919 with starter.
Is it magnetic?
It is magnetic, so it must be brass. I was just surprised of the color. I would have thought that it would be pot metal.
Be careful Paul...
I once did the refrigerator magnet trick on a 16...it stuck...so when I went to grab and pull yank taking the hogsheads off...it almost went airborne and I twisted a knee! It was aluminum, and the refrig magnet just happened to "see" the flywheel magnets.
Paul, you have a double rarity there. Magnetic brass is the first. Second would have been 'pot metal' with a starter motor mounting. Cast iron covers were introduced in 1916, three years before the starter motor.
Or have I miss read your posts?
Allan from down under.
It will not be brass or pot metal it will be cast iron. Magnets only attract to IRON, COBALT AND NICKEL most stainless steel grades are not attracted to a magnet. It is possible that somebody painted it with brass paint. Try scraping some off and you will find cast iron under it.
Oddly, aluminum bronze (aluminum + copper alloy) is magnetic. ?!? What th' ?!? I'm pretty certain no hogsheads from any year were cast from aluminum bronze !
As others have stated, brass in not magnetic.
Now, what are you actually calling the hogshead? Do you mean the removable cover that the pedal shafts are installed in? Or, in other words, the top half of the transmission housing? THAT is the hogshead and they are either aluminum or cast iron. The lower half, which also forms the lower engine pan, is stamped steel, with lots of brazing, (i.e. brass), melted all over it to seal off the and strengthen the rivet holes, where the pan arms are attached. Many folks mistake this as being a brass pan, when in fact it's just steel slobbered with brass.
There are plenty of cast brass transmission inspection plates/covers out there, they were made many years back. I come across them from time to time. They look great polished.
I wondered if Paul was meaning the magneto post fitting ? He says "I would have thought that it would be pot metal", but surely no one would think the Transmission cover would be "Pot metal". After all, it holds the pedals and retains & controls the bands.
Or is he confused as to what "Pot Metal" is ? The term normally associated with low strength aluminium-Zinc diecast alloys.