Thermostat housing

Synchro909 said:
So am I. It seems some industries haven't caught up. That said, it is obvious that all of the systems work in a similar way and work just fine. It is when we try mixing them that the troubles start. IMO, we should dump BSPT and NPT and all go metric as a world wide standard. I'm not holding my breath on that though.
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Synchro,I fear you are too late with your metric unification idea. ISO has already adopted for metric pipe and tube the BSP system including the Whitworth 55 degree thread form and pitch range. For port threads, metric sizes and pitches are used with O rings or washers.
So we have NPT with 60 degree threads and (very!) slightly different pitches for all sizes except 1/2, 5/8 and 3/4 where ISO, BSP and NPT are all 14 tpi and taper threads all use the same taper. So they fit together in these 3 sizes but the threads forms are different, so a good seal cannot be obtained.
This is a constant trap and annoyance in my shop.
The larger pipes from 1 inch to 2 inch differ only by 1/2 tpi. ISO and BSP are 11 tpi but NPT is 11.5 tpi. When up a ladder using a large pipe wrench and sealant-lubricated threads, roughly cut as pipe threads often are, fitting mismatched pipes together can be rather confusing.
SAJ in NZ
 
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nkaminar said:
So I should keep my pre-war Whitworth spanners?
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Hi Nkaminar. Well that depends how you are for shed space. You can of course grind them wider so they may become useful for maybe a specific use. And of course if you are a fisherman .............................
Question. Have you seen art objects made of old tools?? cheers, gary
 
nkaminar said:
So I should keep my pre-war Whitworth spanners?
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Here is some artwork I spoke about. (below). I'm sure you have similar in America. The artist who did these is confined to a wheel chair as he had polio as a kid. cheers again, gary.

I don't seem to be able to upload these so I will send them to Mercman and he will do it with ease.
 
woofa.express said:
No, it did go well. That is for those born in the 70's and later. But Gary (born 1947) still becomes confused or uncertain at times.
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Maybe where you are, but here, gas is still gallons, milk in quarts and Football field is 100 yards.

If you think cars are a mess, you should see CNC machines. You need a machinery bible and mcmaster carr catalog to adapt anything.

John
 
SAJ said:
Synchro,I fear you are too late with your metric unification idea. ISO has already adopted for metric pipe and tube the BSP system including the Whitworth 55 degree thread form and pitch range. For port threads, metric sizes and pitches are used with O rings or washers.
So we have NPT with 60 degree threads and (very!) slightly different pitches for all sizes except 1/2, 5/8 and 3/4 where ISO, BSP and NPT are all 14 tpi and taper threads all use the same taper. So they fit together in these 3 sizes but the threads forms are different, so a good seal cannot be obtained.
This is a constant trap and annoyance in my shop.
The larger pipes from 1 inch to 2 inch differ only by 1/2 tpi. ISO and BSP are 11 tpi but NPT is 11.5 tpi. When up a ladder using a large pipe wrench and sealant-lubricated threads, roughly cut as pipe threads often are, fitting mismatched pipes together can be rather confusing.
SAJ in NZ
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I am aware that the British system of pipe threads has been adopted world in the metric system. So where does NPT fit? I would suggest only in a country that still uses the antiquated imperial system of pounds, gallons, miles etc and there are only three of those. U.S., Liberia and Myanmar. I don't know about Liberia and Myanmar, but the system used by the US is different from the "proper" imperial system.
I am fortunate that my whole career is all about measurements so I have no trouble flicking back and forth between the different systems and some even less used these days than feet and miles, like links and chains (which is a semi metric system.)
 
johnneilson said:
Maybe where you are, but here, gas is still gallons, milk in quarts and Football field is 100 yards.

If you think cars are a mess, you should see CNC machines. You need a machinery bible and mcmaster carr catalog to adapt anything.

John
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I have seen Mcmaster Carr mentioned here before and assume it is some hardware business or industry supplies. Otherwise, I have never heard of them. If that is so, and you need their catalogue to adapt to anything, as you say, maybe it would be a good idea to dump the system virtually no one else uses.
Metric conversion was trying for the older people when it was done here in 1974 but they have all either passed on by now or learned it and we are way ahead compared to where we would have been if we had not converted. There are only 3 countries in the whole world that have not either converted to, or have always been metric.
 
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483687


Woofa Express
 
Arnold, you think the metric system would be better, you want to try metric hydraulic fittings, Japanese metric is different to French metric ,is different to German metric, there are different japanese metric depending on weather Komatsu, Kato, Hitachi, IHI and Kobelco, all different.
Give me UNF and UNC any day.
Lawrie
 
>>Maybe where you are, but here, gas is still gallons, milk in quarts and Football field is 100 yards.

Your gallons are different to ours. We only got a pint of milk years ago. Our cows must be smaller. Football here is nothing like yours so it is not compatible.

With the early internet software was given away for free so as to standardize it everywhere. Maybe pipes should be given away for free?
 
Synchro909 said:
I have seen Mcmaster Carr mentioned here before and assume it is some hardware business or industry supplies. Otherwise, I have never heard of them. If that is so, and you need their catalogue to adapt to anything, as you say, maybe it would be a good idea to dump the system virtually no one else uses.
Metric conversion was trying for the older people when it was done here in 1974 but they have all either passed on by now or learned it and we are way ahead compared to where we would have been if we had not converted. There are only 3 countries in the whole world that have not either converted to, or have always been metric.
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McMaster Carr is in fact an industry supplier. The catalogs are very good reference material, accurate, that makes a huge difference.
I doubt that anyone will change to a world standard, that was attempted and this is the mess we currently have. Better to adapt than complain.

But, if you don't like something you can purchase, feel free to make it yourself.

Best regards, John
 
updraught said:
>>Maybe where you are, but here, gas is still gallons, milk in quarts and Football field is 100 yards.

Your gallons are different to ours. We only got a pint of milk years ago. Our cows must be smaller. Football here is nothing like yours so it is not compatible.

With the early internet software was given away for free so as to standardize it everywhere. Maybe pipes should be given away for free?
Click to expand...

The software battles are over, AutoCad was distributed for free to schools with the thought that first exposure to a platform would ensure success. To a degree this worked, what was not anticipated was the progression of hardware and solid modeling became the rage. You can design in whatever units you wish and the model is true in either form. I have spent years working with international companies on design and manufacturing, the software models have no translation issues.

Software now is built on a subscription model, it makes the cash position of the software developers more consistent and is easier for users to afford multiple platforms to maximize available tools.

You are correct, football here is different and I don't understand any of it. I'll leave it at that. My point was not a metric sized/designated field.

Enjoy the day, John
 
Speaking of McMaster-Carr, here's a picture of an old McMaster-Carr catalogue, before they went digital!
It's about 2-3/4" thick X 6" X 9", or 6.75cm thick X 15.5cm X 23cm
 

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I want to have a temp gauge and a heater and I don't think that can be done the way he makes them (he told me that he would make one with another fitting on the other side it would just take awhile). I'm not aware of a temp gauge sender that can go in a smaller than 1/2" (NPT) hole. Can somebody shed some light on this question for me?
 
Go online and look at digital temp gauges. They fit the housing but not the style of our cars. A temp gauge of any type wouldn't please the purists but even I think twice about a digital one
 
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