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Found: aluminium block with some tapped holes
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ChrisLilley



Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)

PostPosted: Mon Mar 14, 2011 5:16 am    Post subject: Found: aluminium block with some tapped holes Reply with quote

I find myself in need of a custom join-it-all-together plate, which will connect a Newport 460 XYZ block with a long arca-swiss style clamp.

Basically a slab of aluminium, 90 x 80 x 15mm, with four holes tapped 1/4" 20 to bolt to the Newport and two countersunk holes flush 1/4" to bolt to the AS clamp.

I would welcome suggestions of places to have this made (or offers to make it, along with projected costs). I can describe the specific hole positioning and spacing in more detail on request.


Last edited by ChrisLilley on Tue Mar 29, 2011 3:36 pm; edited 1 time in total
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Mon Mar 14, 2011 5:37 am    Post subject: Reply with quote

draw it up and I can machine it...around 20 usd


i'm guessing you need something like this?


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Chris S.
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Joined: 05 Apr 2009
Posts: 3038
Location: Ohio, USA

PostPosted: Mon Mar 14, 2011 9:33 am    Post subject: Reply with quote

Don Wilson, the fabricator whose contact info is in the link in my signature below, makes this kind of thing for me all the time, and is happy to work long distance. The price is always reasonable.

Not to take away from Sonynut's offer, which is a good one. But if that doesn't work out for whatever reason, Don Wilson can take care of you. Depending on which stage it is, I might even have one in hand to show him (he's only a few minutes away from me). And if so, he's already made such a plate for this stage.

--Chris
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ChrisLilley



Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)

PostPosted: Mon Mar 14, 2011 10:43 am    Post subject: Reply with quote

Sonynut, Chris, thanks for the replies. I'm working on a scale diagram.

I have both of the items in-hand (the RRS B2-Pro/L 80mm clamp I have had for a while, and the Newport arrived this morning).

I would probably want to order the requisite Imperial bolts at the same time. Partly because they are difficult to get over here in metric-only Europe and partly because the thickness of the adapter depends to some extent on the lengths of the bolts.
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ChrisR
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Joined: 14 Mar 2009
Posts: 7826
Location: Near London, UK

PostPosted: Mon Mar 14, 2011 10:54 am    Post subject: Reply with quote

Quote:
...around 20 usd

I think you might be very popular Laughing
I'll prepare a list...
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Mon Mar 14, 2011 2:23 pm    Post subject: Reply with quote

ChrisLilley wrote:


I would probably want to order the requisite Imperial bolts at the same time. Partly because they are difficult to get over here in metric-only Europe and partly because the thickness of the adapter depends to some extent on the lengths of the bolts.



1/4" 20 threaded i would guess

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ChrisR
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Joined: 14 Mar 2009
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Location: Near London, UK

PostPosted: Mon Mar 14, 2011 4:09 pm    Post subject: Reply with quote

1/4" x 20 is very easily available in the UK, as Whitworth or UNC.
Plenty on ebay too, e.g cap head screws. ("Allen bolts")
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ChrisLilley



Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)

PostPosted: Mon Mar 14, 2011 4:46 pm    Post subject: Reply with quote

Here is what I had in mind. The plate is 3.5 inch (88.9mm) by 80mm.

The four holes to attach to the newport are on one inch centres in the Y dimension and three inch centres on the X dimension and tapped 1/4" 20.

The two holes to attach to the RRS clamp are on 45mm centres and allow a 1/4" bolt to pass, with the bolt head flush once fitted. I don't know the diameter or slope of the countersink, it depends on what the bolt uses.

Similarly the depth depends on how long the bolts are.



For reference here is a drawing of the Newport 460 XYZ. The dimensions labelled A, B, C are 1/4", 0.5" and 1" respectively.

The base plate is 6.3mm deep and the countersunk holes seem to be for cylindrical-headed bolts with 7mm or less diameter of the bolt head.


Image credit: Newport
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Mon Mar 14, 2011 7:19 pm    Post subject: Reply with quote

no problem..1/2" thick ok?



as for hardware.(and just about anything)..check out http://www.mcmaster.com

they are the best
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ChrisLilley



Joined: 01 May 2010
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Location: Nice, France (I'm British)

PostPosted: Tue Mar 15, 2011 4:55 am    Post subject: Reply with quote

SONYNUT wrote:
no problem..1/2" thick ok?


ChrisLilley wrote:

Similarly the depth depends on how long the bolts are.


... and I didn't know what lengths bolts come in. But thelink below indicates 1/2"bolts are widely available, should be right?.Or is that too long?

SONYNUT wrote:
as for hardware.(and just about anything)..check out http://www.mcmaster.com

they are the best


Thanks for the link. OK so I found some flush bolts that are 1/2" long including cap that look like they would suit (I don't kow anything about the grades of steel or the various specs). And the head on them is

Head Diameter
.531"
Head Height
.161"
Undercut Head
No
Head Angle
82°

Does that give enough info to cut the countersink for the two holes that attach to the arca plate?

The heads on the plain cap ones seem to be wider (3/8") than the countersunk cutout on the Newport .... checks ... no, should be okay.

Now to see what happens when I enter a French address and ask for shipping. Accepted, 'applicable' (but undisclosed) shipping will be added. Okay, hopefully I have bolts now.
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Tue Mar 15, 2011 5:04 am    Post subject: Reply with quote

1/4 20 machine/allen bolt head is about 5/16'

your arca uses 1/4 20 bolts then ,correct?
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ChrisLilley



Joined: 01 May 2010
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Location: Nice, France (I'm British)

PostPosted: Tue Mar 15, 2011 5:46 am    Post subject: Reply with quote

SONYNUT wrote:

your arca uses 1/4 20 bolts then ,correct?


Yes.

More precisely it has a single central 3/8 hole, which I don't plan to use and is not indicated on my sketch, plus two 1/4 20 holes which I will use. These are on 45mm centres and symmetric over the 80mm length of the clamp. Which is why I made the adapter plate 80mm.
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Tue Mar 15, 2011 6:12 am    Post subject: Reply with quote



if you could just reach out and touch it... Wink
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ChrisLilley



Joined: 01 May 2010
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Location: Nice, France (I'm British)

PostPosted: Tue Mar 15, 2011 6:26 am    Post subject: Reply with quote

SONYNUT wrote:


if you could just reach out and touch it... Wink


Coolness!

Since the bolts there obviously fit, if you could let me know how much for the whole thing with the piece and the bolts and shipping to France.
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SONYNUT



Joined: 22 Jan 2011
Posts: 634
Location: Minnesota USA

PostPosted: Tue Mar 15, 2011 7:21 am    Post subject: Reply with quote

it's on the way with bolts
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Last edited by SONYNUT on Tue Mar 29, 2011 5:54 pm; edited 1 time in total
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