SPAM: Backplates for sale

We just finished a run and I have a couple extra's to offer at the bro
discount for my friends on rec.scuba.

Regular size only, 1/8" 316L.

We had a friend with a CNC router run a chamfer tool on all the edes, holes
and slots, so the edges are gorgeous, and not a chance of ever cutting
anything.

Ping me off line if you want one.

"Scott" <pugetsounddiver@gmail.com> sputtered:

> Ping me off line if you want one.

Drop it off at the Peace Arch.

*** Posted via a free Usenet account from http://www.teranews.com ***

Scott wrote:
> We just finished a run and I have a couple extra's to offer at the bro
> discount for my friends on rec.scuba.
>
> Regular size only, 1/8" 316L.
>
> We had a friend with a CNC router run a chamfer tool on all the edes, holes
> and slots, so the edges are gorgeous, and not a chance of ever cutting
> anything.
>
> Ping me off line if you want one.
>
>
I'm still waiting for the brass backplates

--
“TANSTAAFL”

__________________________________________________ __________________________
"A prudent man foresees the difficulties ahead and prepares for them;
The simpleton goes blindly on and suffers the consequences." - Proverbs 22:3

“The strength of the pack is the wolf”
Rudyard Kipling

"dazed and confuzzed" <dedmann@comcast_remove.net> wrote in message
news:ffKdnfyr9MSvIOHZnZ2dnUVZ_t2dnZ2d@comcast.com. ..
> Scott wrote:
> > We just finished a run and I have a couple extra's to offer at the bro
> > discount for my friends on rec.scuba.
> >
> > Regular size only, 1/8" 316L.
> >
> > We had a friend with a CNC router run a chamfer tool on all the edes,
holes
> > and slots, so the edges are gorgeous, and not a chance of ever cutting
> > anything.
> >
> > Ping me off line if you want one.
> >
> >
> I'm still waiting for the brass backplates

If you are serious, you are going to have to be ready to drop $250 or so.

In article <1149048078.033292.251220@h76g2000cwa.googlegroups .com>,
Grumman-581 <grumman581@gmail.com> wrote:

€ Scott wrote:
€ > If you are serious, you are going to have to be ready to drop $250 or so.
€
€ I had been under the impression that brass / bronze was cheaper than
€ stainless steel... Of course, it's definitely a hell of a lot easier to
€ machine...
€
€ Checking at www.onlinemetals.com, I find the following:
€
€ Full sheets of the material is 36"x48"...
€ Assuming approximately 0.125 thickness needed...
€
€ Stainless 316 (4.9594 lbs/sq-ft) is approx $29 / sq-ft
€ Brass (5.554 lbs/sq-ft) is approx $47.73 / sq-ft
€ Copper (5.796 lbs/sq-ft) is approx $82.58 / sq-ft
€ Aluminum 6061 T6 (1.764 lbs/sq-ft) is approx $9.58 / sq-ft
€ Titanium (2.934 lbs/sq-ft) is approx $198 / sq-ft

Hmmm, for about $500, I could have the ultimate travel plate



€
€ Prices from a local supplier should be considerably cheaper than
€ through this web site though...
€
€ Of course, if you're going to have a brass backplate, you *must* have
€ the rest of your hardware brass, right? Hell, you could even machine
€ yourself out a few weights out of 1.5"x3" solid rectangle stock (16.578
€ lbs / linear foot) for the ultimate "pimp my dive gear"
€ configuration... <grin> Kind of expensive at $123.30 / linear foot
€ though... Hmmm... That works out to $7.43 / lb... Damn... Sounds about
€ like what some of the local dive shops like to charge for weights...
€
€ Still, you gotta have at least brass D-rings and keepers... They can
€ probably be cut out of the same brass sheet that the backplate was
€ being cut of out so as to waste as little metal as possible...
€

"Alan Street" <agstreet@nonono_san.rr.com> wrote in message
news:300520062128488253%agstreet@nonono_san.rr.com ...

> Hmmm, for about $500, I could have the ultimate travel plate

Material alone would be around $300, at that price.

Sometimes you can luck out at Boeing surplus, but you would have to be there
very day.

http://www.boeing.com/assocproducts/...locations.html

Also, because of the higher strength of titanium (try to get a piece of
6AL4V), and since you arent worried about weight or trim, you wouldnt need
anywhere near a 1/8" plate, you could do very well with a piece of .06"
plate.

Scott wrote:
> How about not.

Awh, come on... Where's you're sense of humor / adventure? It seems
that there is a certain segment of the truck and Jeep owners who want
the diamond plate added to certain parts of their vehicles... You see
it in the truck bed tool boxes, tailgate protectors, and rail guards...
It only follows that they would also want their backplate in the same
thing, right? It would be a niche market, but I would not be surprised
if some guys wouldn't buy one even though they might already have an
aluminum plate... The market might not be such that you would have
people buying it instead of a regular plate, but you might get some
people to buy it as an additional plate even though they really don't
need an additional plate.. Cost wise, it should cost about the same
since the prices for the whole sheets are nearly the same...

$136.33 for a 36"x48" sheet of 0.125" diamond plate
$115.00 for a 36"x48" sheet of 0.125" regular aluminum sheet

I don't have a ruler handy, so I can't measure your plate right now...
Best I remember, it's around 16" long, right? What was the width of
the blank before the bends? Rough guess is that a 36"x48" sheet should
be able to produce at least 6 plates... Thus, a material cost of $22.72
for the diamond plate vs $19.17 for the regular aluminum sheet.. An
extra $3.55 per backplate in material costs... I suspect that the labor
costs for the rest of it would remain the same... The only concern
might be the alloy since it's 3003-H32 instead of 6061-T6...

If a company was mass producing the plates, they would be considerably
cheaper... They could be stamped out instead of being milled... Since a
backplate lasts nearly forever, I seriously doubt that the market is
there for that sort of thing...

Hey, here's an idea... How about anodized aluminum diamond plate? All
you would need is to rig up some LED edge lights around the tank like
some of these kids put on their coffee can muffler rice-cars these
days... <snicker>

Grumman-581 wrote:
> Scott wrote:
> > How about not.
>
> Awh, come on... Where's you're sense of humor / adventure? It seems
> that there is a certain segment of the truck and Jeep owners who want
> the diamond plate added to certain parts of their vehicles... You see
> it in the truck bed tool boxes, tailgate protectors, and rail guards...

On fire engines, we used it to hide "scabs".

I've seen a backplate made from diamond brite, but I don't remember who
had it.

>From what I remember from building firetrucks, it bent ok on the brake
with a decent radius toolset, but it didn't do well on the Fasti folder.

"Grumman-581" <grumman581@gmail.com> wrote in message
news:1149087677.040657.297830@c74g2000cwc.googlegr oups.com...
> Scott wrote:
> > How about not.
>
> Awh, come on... Where's you're sense of humor / adventure?

I have plenty of things to waste time and money on as it is.

> I don't have a ruler handy, so I can't measure your plate right now...
> Best I remember, it's around 16" long, right? What was the width of
> the blank before the bends? Rough guess is that a 36"x48" sheet should
> be able to produce at least 6 plates... Thus, a material cost of $22.72
> for the diamond plate vs $19.17 for the regular aluminum sheet.. An
> extra $3.55 per backplate in material costs... I suspect that the labor
> costs for the rest of it would remain the same... The only concern
> might be the alloy since it's 3003-H32 instead of 6061-T6...

Go right ahead, I'll send you the CAD files.

It would have to be 5053 or 3003, 6061 T6 doesnt bend worth a damn at those
tight radii, it splits.

"Grumman-581" <grumman581@gmail.com> wrote in message
news:1149129061.191093.213480@i39g2000cwa.googlegr oups.com...
> Scott wrote:
> > Go right ahead, I'll send you the CAD files.
>
> Awh, 'ell, I might just do it if you'll send the CAD files...
>
> How do you normally cut the plates out with? Abrasive water jet, some
> type of milling machine, or some sort of heat based method?

Depends upon the material and thickness.

Sometimes laser, some times water jet, some times milling machine and CNC
router.