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stuper
member


Reged: 09/12/08
Posts: 70
Loc: Central California
Thickness of Aluminum Pier Plate
      #3040281 - 04/12/09 06:42 PM

I'm planning to make a 12-inch diameter concrete pier for my 10" LX200. If I use aluminum for the pier plate, how thick should the aluminum be?

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Telescopeman54
Vendor - Trapezium Telescopes & Services, LLC.


Reged: 08/17/07
Posts: 1715
Loc: New Hampshire
Re: Thickness of Aluminum Pier Plate new [Re: stuper]
      #3040313 - 04/12/09 07:07 PM

1/2" to 3/4" should be more than enough.

Steve

--------------------
Stephen Forbes - President
Trapezium Telescopes & Services, LLC
10013 Calle de Palencia
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1.850.736.3559 (Cell)
Web: http://TrapeziumTelescopes.com
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A whole bunch of stuff mostly mounted on a Mini Tower Super Charger.


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stuper
member


Reged: 09/12/08
Posts: 70
Loc: Central California
Re: Thickness of Aluminum Pier Plate new [Re: Telescopeman54]
      #3040366 - 04/12/09 07:49 PM

I can save a few bucks with 3/8". Would that be thick enough?

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fetoma
Carpal Tunnel


Reged: 09/26/06
Posts: 1851
Loc: Southern New Jersey
Re: Thickness of Aluminum Pier Plate new [Re: stuper]
      #3040479 - 04/12/09 09:07 PM

I would go for an inch thick. 3/8 is too thin. How much weight is the scope and mount together? This is what I used but you can go smaller in diameter:

http://www.speedymetals.com/pc-2458-8368-12-rd-6061-t6511-aluminum-extruded.aspx

--------------------
Frank in the NJ Pinelands

Vixen GP-DX w/AutoStar * Orion Atlas EQ-G
Meade SN-10 * Meade 8" f/6.3 SCT * Intes-Micro M73 * Stellarvue 80/480 LOMO Triplet * Takahashi FS-60C *

http://www.jerseydevilastronomy.com


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DeanS
Carpal Tunnel


Reged: 07/12/05
Posts: 2560
Loc: Central Kentucky
Re: Thickness of Aluminum Pier Plate new [Re: fetoma]
      #3040485 - 04/12/09 09:15 PM

I did a 1/2" plate that was 12" x 12" and it was too thin. 3/4" was better, 1" would be even better.
Also you may have to tap some threads in it and 1/2" would be more difficult to do.

--------------------
AP900GTO, AP1200GTO,
Tak Epsilon 160, FS60C, SV80
12.5" F/3.8 AGO Newtonian,
C9.25, 8" LX200GPS,
18" Starmaster w/Zambuto F/4.3,
FLI ML8300,
QSI640WSG-8
ST2000XM, Lodestars
Some Uncle Al's glass hand grenades


www.doghouseastronomy.com







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Strgazr27



Reged: 10/04/04
Posts: 7104
Loc: StonyHill Observatory
Re: Thickness of Aluminum Pier Plate new [Re: DeanS]
      #3040562 - 04/12/09 10:14 PM

Mine is 1" X 12" X 12" 7075 Plate Plenty strong enough.....

--------------------
Bobby

http://www.strgazr27.zenfolio.com


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stuper
member


Reged: 09/12/08
Posts: 70
Loc: Central California
Re: Thickness of Aluminum Pier Plate new [Re: Strgazr27]
      #3044169 - 04/14/09 08:14 PM

Sorry, been away for a while. Thanks for the tips. I didn't realize extruded rod came in such large diameters. I was pricing it as flat plat, which is more expensive. I will get a 1" thick piece of 8" or 9" diameter rod. Is 6061-T6 sufficient, or should I get 6262-T6511 or 7075-T651 or something else?

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fetoma
Carpal Tunnel


Reged: 09/26/06
Posts: 1851
Loc: Southern New Jersey
Re: Thickness of Aluminum Pier Plate new [Re: stuper]
      #3044198 - 04/14/09 08:32 PM

It all depends on what $$$ you want to spend. I used 6061, but 7075 is better, but more expensive.

--------------------
Frank in the NJ Pinelands

Vixen GP-DX w/AutoStar * Orion Atlas EQ-G
Meade SN-10 * Meade 8" f/6.3 SCT * Intes-Micro M73 * Stellarvue 80/480 LOMO Triplet * Takahashi FS-60C *

http://www.jerseydevilastronomy.com


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stuper
member


Reged: 09/12/08
Posts: 70
Loc: Central California
Re: Thickness of Aluminum Pier Plate new [Re: fetoma]
      #3045212 - 04/15/09 11:55 AM

Frank, does yours made from 6061 work OK? How thick is it? What kind of scope/mount do you have on it?

Edited by stuper (04/15/09 11:56 AM)


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fetoma
Carpal Tunnel


Reged: 09/26/06
Posts: 1851
Loc: Southern New Jersey
Re: Thickness of Aluminum Pier Plate new [Re: stuper]
      #3045280 - 04/15/09 12:35 PM

Mine is 1" thick 6061 with a CGE on top. Works just fine.

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/3024425/page/2/view/collapsed/sb/5/o/all/fpart/all/vc/1

--------------------
Frank in the NJ Pinelands

Vixen GP-DX w/AutoStar * Orion Atlas EQ-G
Meade SN-10 * Meade 8" f/6.3 SCT * Intes-Micro M73 * Stellarvue 80/480 LOMO Triplet * Takahashi FS-60C *

http://www.jerseydevilastronomy.com


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DrBuck
professor emeritus


Reged: 12/10/08
Posts: 506
Loc: Susanville, No. Calif.
Re: Thickness of Aluminum Pier Plate new [Re: fetoma]
      #3049847 - 04/17/09 08:32 PM Attachment (26 downloads)

My CGE is mounted on a one inch aluminum adapter plate that I had machined to fit the CGE base. I then drilled and tapped it to fit the screws and bolted it to my 3/4 inch stainless steel leveling plate with a 1/2 inch bolt.

Attachment

--------------------
DrBuck

Roll off Roof Observatory,
MI 250 on concrete and steel pier
Takahashi FS 152 apochromatic refractor
Astro-Tech Ritchey Chretien 12 inch
Televue 85MM Apochromatic refractor
Nikon D-90 with 18-200mm AF VR lens
DMK-21
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Hank w
member


Reged: 09/10/08
Posts: 51
Loc: Loveland, Colorado
Re: Thickness of Aluminum Pier Plate new [Re: DrBuck]
      #3049906 - 04/17/09 09:18 PM

Try this link " http://www.sandsmachine.com/alumweb.htm "best price and perfect for a pier plate. I've made several with there product
Hank

--------------------
9 1/4 celestron gps pier mount and fork mount
stellarvue 102 ed
AT80ED
AT RC6
CGEM
celestron 15-70 bino's
criterion RV-6
dsi 1,11,111 color
pentax K-5
olympus 620
etc.....


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