OzVMX Forum
Clubroom => Tech Talk => Topic started by: LWC82PE on October 14, 2018, 02:30:43 pm
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Can anyone tell me the hole dia in the perforated sheet heat guards on the Bassani pipes? I thought it was 3/8 but i am struggling to find 18g (1.2mm) with that hole size. I can find 1.5 or 16g but its a bit thick i reckon. I did find some with 1/4 holes so maybethey used that? I have a sales add and it says the shields were made of 18g. Maybe someone can confirm the thickness as well thanks.
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My Mic comes in at 0.344/8.74, Thats complete with paint and a few years of corrosion so Id go with 3/8th
Bit difficult to measure thickness as its edges are folded and I cant get the Mic in there as its too close to the pipe.
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Thanks. I have a lot of photos but its hard to work out the thickness. I can get 9.5mm holes in 1.5mm thickness but i tend to think this would be too thick to fold the edges over. i might see what is out there in 5/16 or 8mm too.
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Bit difficult to measure thickness as its edges are folded and I cant get the Mic in there as its too close to the pipe.
If you can push something through one hole to hold behind another hole you can measure the depth with the end of a Vernier
My guess would be 1.0 or 1.2mm, I highly doubt they used 1.5mm
Large holes like 3/8" or 10mm would mostly be made with a thick material like 1.5 because most perf is made for industrial applications.
If you really want it to look original then get a piece laser cut or go through the pain and drill a sheet, most of the work is marking out the centers
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Good thinkin GMC .
Via a dodgy pocket knife blade as a backing we get 1.02 as plate thickness.
I dont have a decent hosting account or I could post a pic. I will stick a close up on the Facebook page for perusal.
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Prett much every place i have found so far only lists 3/8 holes in 1.5mm thickness but i was not looking for 1mm though. Just 1.2
Everything i want is always hard to find!
Not keen on drilling hundreds of holes
I will contact some places and see what i can come up with but since you guys think it would not be 1.5mm thick then i wont get that.
By the way i did find a Bassani ad that said the shields were 18G and the pipe cones 22G but the 22g sounds too thin for a pipe so i was wondering if the shield was correct too.
Would you be able to tell me the distance between the centers of the holes too?
Am just not finding anything with 8-9mm holes that is under 1.5mm thick but i am finding a few places that look like they will make anythign you want so i will probably ask them
Thanks
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Prett much every place i have found so far only lists 3/8 holes in 1.5mm thickness but i was not looking for 1mm though. Just 1.2
Everything i want is always hard to find!
Not keen on drilling hundreds of holes
I will contact some places and see what i can come up with but since you guys think it would not be 1.5mm thick then i wont get that.
By the way i did find a Bassani ad that said the shields were 18G and the pipe cones 22G but the 22g sounds too thin for a pipe so i was wondering if the shield was correct too.
Would you be able to tell me the distance between the centers of the holes too?
Am just not finding anything with 8-9mm holes that is under 1.5mm thick but i am finding a few places that look like they will make anythign you want so i will probably ask them
Thanks
Sketch a drawing of the shape and hole positions and have it laser cut.
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Rectangle 700 x 200 qty 5 or 6. Who would do that?
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If you don't have anyone locally to do it I can organize it for you
I would need to know the pitch of the holes in both directions if they happen to be different
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Looks like it might be GMC to the rescue then.
I just need to work out the spacing. From what i am seeing around 40% open area is pretty common
Pokey can you check please?
Hopefully this photo show up
(https://hjvw0q.bn.files.1drv.com/y4pxbHc2sGNlL2y7mmc1OFThTEWt8wZTwEyLFWfoHu2GI5nhTdymsP2xZ-mAiMA_GBY094mCHSABANOBSobp7MyZCjAP5UtoO-B4pDKmA5yq-FfO0_3RXtnMJcB63sAQXTV7cYJLFlptxptnMeR8Mf8yClj49jcHCVHLinPcD7UR4aMuJs-Hh6l66WxHctSt7UabcUcllx6GJnU97C_VXRUFQ/185b.jpg?psid=1)
This looks right but just too thick
https://www.ebay.com.au/itm/GALVANIZED-STEEL-PERFORATED-METAL-SHEET-MESH-380mm-X-300mm-10mm-ROUND-HOLES/122029035944?hash=item1c697f51a8:g:vqoAAMXQMXRQ9L2y:rk:10:pf:0
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Rectangle 700 x 200 qty 5 or 6. Who would do that?
There are numerous online laser cutting services.
For other work I have made templates with a solid margin to allow for welding. Spec your holes as 8 on 16 say: 8 diameter, 16mm pitch.
Stainless steel is more expensive but has properties that might make it a better material choice.
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I enlarged a a photo on my screen so the holes were about 9.5mm or 3/8 and it looks like the spacing is 16 to 17mm
With laser cutting do you need specify slightly smaller holes than the finished size you want?
I prefer plain mild steel as its to be welded to mild steel pipe at least one anyway. I may make a screw on one fr another pipe.
If you have links to online laser cutters that would be good. I was prepared to by this sheet cut to my required size from USA for around US $27 a piece until i found out 16g 1.5mm? was going to be too thick so if the laser cutting is in that range, a little less or more that would be good if i get what i want.
I am thinking of going with 1.2mm or 18G thickness? I am not exacty sure on that now because the sites i am using are giving conflicting answers on sheet metal gage to mm. One says 16g is 1.2mm and another says 18g is 1.2mm so i am a bit confused now?????
it seems like 3/8 holes with 0.563 (14.30mm) spacing which is 40% open is a industry standard but if the the holes in the Bassani are full 3/8 i think the spacing is more than that but i admit that scaling it off my screen is probably not the most accurate though. With holes around 8.5mm the spacing seems to be around 14.5mm. My gut tells me that since they are US made that the holes would have been 3/8" and not 8.5 or 9mm so this is why i am leaning towards 3/8".
Thanks guys
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LWC82PE have a Google for laser cutters; there are quite a few around the country- or take up Geoff's kind offer.
1.2mm sheet thickness would normally be regarded as 18 gauge, 1.6 as 16 gauge, .95 as 20 gauge.
The laser cutter will cope with far thicker material and the programmer will do the required calculation to get your diameter.
Be aware that the laser cut sheets' hole appearance will be different from the likely punched hole on the original. :)
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While you can scale close from photos you would be better to go from measurements where you can.
Obviously you want the shields to look like originals so best to get it as close as you can otherwise you could use any old thing.
No ones going to notice whether they are 10mm or 3/8" holes but a different pitch will stand out.
As Momus says 1.2 =18# and 1.5 = 16# however the US may run different specs?
Perf sheet is usually punched out a row of holes at a time, you can get perf made in a turret punch but they will only punch one hole at a time, even though the sheet will be moved around by CNC it is still a slow process and needs to have the right size punch fitted to the machine.
Laser cutting is great for cutting out intricate shapes but there will be a small dag where the laser stops and starts in the hole but it is usually very minor. A plasma will leave a bigger dag
It will produce what ever size hole you draw, any difference is not worth measuring
My CZ heat shields I have laser cut in 1.2
(http://www.geoffmorrisconcepts.com/inc/shop/images/e5c7530d1a558b0d42ada12d56f3669b.jpg)
Plenty of laser and water jet cutters these days, water is slower and best suited to thick materials
Most will charge you a programming fee
I get stuff laser cut all the time and draw up my own CAD files, can easily draw up your perf if I have the dimensions and get a quote for you or you can use the file to get your own quotes
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Also most places have minimum charges, fair enough when you consider the guy on the fork lift has to get the sheet out of the rack and take it to the machine where it has to be lined up and then the program loaded into the machine.
Its not usually economical to cut a one of but laser cutters are happy to cut any shapes out of the same material so the more bits you need the better.
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I looked on google but was only getting places that do the laser cutting in plastic signs and more into 'craft' type stuff and di not look like they had sheet metal so i think GMC is the way to go here once i confirm hole size, thickness and spacing i want. i got a feeling one site saying 16g was 1.2mm was a wire gauge, not sheet gauge so thats why i had 2 sites telling me different things. I tested a piece of 1.2mm sheet and it bent easily with pliers so i think i will go with 1.2mm for sure as its is equal to 18G and is what the Bassani sales brochure says they used. 1mm might be a little thin?
I specifically like the look of the Bassani guards so i want that look. Other brands used much smaller holes that i don't like the look of those
With the small dag i am prepared to run a file through the holes or drill bit to clean them up so i think that wont be a problem.
So once i get details on hole spacing and or draw up something on paper so i can get a better visual idea of the hole size/spacing i will get in contact with you.
Thanks
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33.5 horizontal and 22.5 verticle.
That's measured outside to outside with a hole 8.9
I will stick some more pics on the fb post.
Cheers
https://www.facebook.com/groups/OzVMX/permalink/1038287466353969/
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Something like this?
(https://www.freesites.com.au/login/members/imagemanager/images/89fcd07f20b6785b92134bd6c1d0fa42/Misc%20Photos-1/Bassani-heat-shield-2.jpg)
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Some time ago i was looking for perforated mesh and vaguely remembered that locker group around moorabbin or "Clayton or similar had many types of mesh
May be worth a "Google"
They have both expanded and perforated mesh
Locker.com.au
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Not quite GMC but close. The hole arrangement isn't square and vertices measurement is directly above.
Remember guys these were Yankee devices so would be US gauge and US imperial measurements and it's not symetrical. On my phone so techy stuff is difficult.
http://www.kingdamesh.com/Perforated-Metal-Mesh/Mild-steel-perforated-panels-245-1.htm
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Gotcha;
(https://www.freesites.com.au/login/members/imagemanager/images/89fcd07f20b6785b92134bd6c1d0fa42/Misc%20Photos-1/Bassani-heat-shield-2B.jpg)
Also 1.2 sheet will most likely measure 1.1mm
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Spot on buddy. You should start a business making those things ;D
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Yeah, I could call it Red Cross Engineering ;D
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weird stuff happens to your eyes if you look at that pattern long enough :o
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I put a subliminal message in it that will make you want to make Paypal gifts to me ;D
Next step is to work out what size piece you really need.
Laser cutters quote their work based on the total length of cutting and how many stops and starts.
This piece looks to me to be bigger than what is needed so it would be wise to trim it down otherwise you will be paying for the cutting of a lot of holes that you are going to throw in the bin
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wait til you see the heat guard i made for the husky...15 mins, a jig saw and a rule of thumb...im giving it 1/2 to 3/4's of a lap around blackwood...
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I put a subliminal message in it that will make you want to make Paypal gifts to me ;D
i put that pic into a file and played it backwards it said
Kawasaki's Are evil and GMC does the work of beelzebub.
been hiding under my bed ever since with a clove of garlic.
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;D gold....
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Now now boys, Real men know that Kawasaki's aren't evil,
Everything worth writing about those other brands can be found on a T shirt
(https://www.freesites.com.au/login/members/imagemanager/images/89fcd07f20b6785b92134bd6c1d0fa42/Harrow-2018-3.jpg)
wait til you see the heat guard i made for the husky...15 mins, a jig saw and a rule of thumb...im giving it 1/2 to 3/4's of a lap around blackwood...
1/2 to 3/4's of a lap eh?
Are you intending on crashing out or breaking down?
If you are able to define the spot a bit better it would be a great help to the sweeps that are going to tow you out :o
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im suspecting it will fall off after a major structural failure....i will only realise when my leg gets hot! i plan to beat the sweeps back!
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Looks great but i want the hole rows the otherway around like below pic. I just emailed you that info now. Thanks
LOTS of places have mesh but i have not bee able to find any that have 1.20mm or 18g with 3.8 holes in mild steel.
3/8 holes only come in sheets 1.5 or 1.6mm thick
Maybe 9mm holes is the go rather than 3/8 too. Another guy is also checking his Bassani
my 700x200 allows for extra so is not ultra critical. I have a friend who wants some too so i am waiting to see what size would work for his pipes so then we can just get the sheets all one size hopefully rather than a few at different sizes.
I think 1.1 should still be ok?. I know 1mm sheet is often around .90mm but thats getting too thin.
(https://beta-static.photobucket.com/images/h357/30782/0/b1958e52-cdb7-48ab-ab3d-d4bc51be5aa0-original.jpg?width=1920&height=1080&fit=bounds)
(https://beta-static.photobucket.com/images/h357/30782/0/49fd02cd-d27d-4881-9b09-3cc69c7b3134-original.jpg?width=1920&height=1080&fit=bounds)
(https://beta-static.photobucket.com/images/h357/30782/0/d5ef986b-ea56-4379-b5f8-5fc72cd66b21-original.jpg?width=1920&height=1080&fit=bounds)
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so it would be wise to trim it down otherwise you will be paying for the cutting of a lot of holes that you are going to throw in the bin
Hmmm, what happens when you throw a lot of holes in the bin? Do they fall out the bottom and just keep on going?
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that will only happen with rimless race holes :o
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I dont think i will want to reduce the size too much. Maybe 25mm off length and width. Lets see what the quote is first.
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a lot of holes that you are going to throw in the bin
Hmmm, what happens when you throw a lot of holes in the bin? Do they fall out the bottom and just keep on going?
I was wondering a similar thing to Canam370. A hole by definition is a space or absence of matter. So are you saying GMC that you would in fact be throwing nothing in the bin? :o
Tex