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Old 05-15-2019, 07:26 AM   #541
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Default Re: Using 80/20

Quote:
Originally Posted by Graphite Dave View Post
One method of thermally isolating a 80/20 structure from the van steel:

https://www.boellhoff.com/us-en/prod...-rivnut-av.php

Aluminum is a very good conductor. When the extrusions are directly bolted to the van steel the aluminum gets close to the temperature of the steel van body.
What are thoughts about using sill seal (polyethylene foam gasketing strips) like used on a building foundation to isolate the 80/20?
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Old 05-15-2019, 09:48 AM   #542
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Default Re: Using 80/20

Iím not entirely convinced it makes that much of a difference, though others may differ. I think any metal just feels colder in general, especially in colder temperatures. Itís one reason why I like the all wood interior of my van, though the van Iím converting right now is using 8020 as the cabinetry framework.


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Old 05-15-2019, 01:09 PM   #543
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Default Re: Using 80/20

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Originally Posted by akadventurecpl View Post
What are thoughts about using sill seal (polyethylene foam gasketing strips) like used on a building foundation to isolate the 80/20?
That would definitely make a difference.

Aluminum is the fourth most conductive (common) metal, scoring 237W/m.K, compared to 54W/m.K for carbon steel and under 40 for stainless steels.

For comparison, polyurethane is 0.02W/m.K and wood tops out at 0.1. Virtually all rubber and plastic materials will score under 1W/m.K.

Even a strip of electrical tape between the parts will make a noticeable difference. Because you have a steel bolt connecting the two parts, you donít need perfect insulation, just a reduction in connection area.

I am currently looking for insulating material myself, as my build starts next week. I am looking for something that is 1mm to 2mm thick, and is very stiff so the parts donít have enough freedom to loosen the bolt by vibration.

I plan to walk the aisles of my hardware store to find a stiffer gasket material than the sill seal mentioned, starting in the weather stripping section.
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Old 05-15-2019, 01:27 PM   #544
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Default Re: Using 80/20

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Originally Posted by Gski View Post
Even a strip of electrical tape between the parts will make a noticeable difference. Because you have a steel bolt connecting the two parts, you donít need perfect insulation, just a reduction in connection area.

I am currently looking for insulating material myself, as my build starts next week. I am looking for something that is 1mm to 2mm thick, and is very stiff so the parts donít have enough freedom to loosen the bolt by vibration.
I also insulated the bolt heads from the angle extrusion with plastic spacers. One spacer between the extrusion and van steel and one spacer between the bolt head and the extrusion.

Spacer source: https://product-components.com/plast...pacers/spacers

Used 1/2" plywood between roof rib and extrusion to hang top overhead cabinet extrusion from the rib. Angle on rib to plywood with plywood bolted to extrusion. Cabinet bottom is 1/2" plywood bolted to lower extrusion on one end and to the wall at the other.
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Old 06-08-2019, 09:13 PM   #545
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Question Re: Using 80/20

I have not found any reference to how best to make a 5/16" tap on the end of the smooth profiles with the x shaped center ... the 5/16" tap bit just wants to bind when I attempt it. Any advice?
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Old 06-08-2019, 09:19 PM   #546
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Default Re: Using 80/20

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Originally Posted by akadventurecpl View Post
I have not found any reference to how best to make a 5/16" tap on the end of the smooth profiles with the x shaped center ... the 5/16" tap bit just wants to bind when I attempt it. Any advice?
Make jig with a 5/16" threaded hole to clamp to the t-slot that will position and hold the tap on centre while entering the t-slot x-hole.
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Old 06-08-2019, 09:24 PM   #547
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Default Re: Using 80/20

Quote:
Originally Posted by akadventurecpl View Post
I have not found any reference to how best to make a 5/16" tap on the end of the smooth profiles with the x shaped center ... the 5/16" tap bit just wants to bind when I attempt it. Any advice?
Use a spiral tap.
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Old 06-08-2019, 11:37 PM   #548
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Default Re: Using 80/20

Like this.
http://www.toolinghost.com/productdi...asp?series=761
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Old 06-08-2019, 11:52 PM   #549
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Default Re: Using 80/20

I agree with above comments. For profiles with slotted center hole a spiral tap is practically required. I tried with straight flutes tap and it was nerve-racking.
https://www.amazon.com/HARKY-Vanadiu...gateway&sr=8-1

Just make sure you keep the tap very straight as you start tapping.
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Old 06-11-2019, 05:55 AM   #550
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Default Re: Using 80/20

I used the Dewalt combo drill-tap, and found it worked better than just the spiral tap itself.

https://www.amazon.com/DEWALT-DWADT5.../dp/B014R19N8M


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