Stuart Triple glands

This topic has 7 replies, 4 voices, and was last updated 25 March 2022 at 07:00 by JasonB.

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24 March 2022 at 13:23 #591414
Matt Stevens 1
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@mattstevens1
Hi All,

So it seems the glands provided by Stuart models for the piston rods/lower cylinder covers on the triple are cast undersize. The drawing calls for a finished diameter of 3/8" and the cast part is already less than that so impossible to machine! Of course I have finished the cylinder covers so I cannot adjust that size.

Whilst I wait to see if Stuart will do something about it (right now they are claiming they have always been like that….what, not to drawing!!), its likely I will have to fabricate something from bar stock.

Question I have is – will brass suffice or does it need to be gun metal or bronze?

Has anyone else seen this on Stuart Triple castings?

Thanks

Matt
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24 March 2022 at 13:23 #28634
Matt Stevens 1
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@mattstevens1
24 March 2022 at 13:27 #591416
JasonB
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@jasonb
You could just turn the spigots to say 5/16 and Loctite on a 3/8" OD sleeve which could happily be from brass.

If making from solid then bronze is the better material for the rods to slide against
24 March 2022 at 13:59 #591419
Dalboy
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@dalboy
I would have thought that they should replace it with suitable sized material as the stock they sent "Was not fit for purpose"

Claiming that they always do it that way means they fully well know that it is wrong and should alter the way they do it, I am glad that I did not buy one of their kits now as that is what I was going to do.
24 March 2022 at 14:11 #591421
Matt Stevens 1
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@mattstevens1
Hi Jason – Yes that could be a good idea thanks.

Hi Derek – You might be right, but i like to give people the benefit of the doubt. It could be that there is some variance in the castings and i just got some bad ones. I asked if they can measure a few samples to check…. however if they are all bad and this has been the case for some time, then yes, i would expect an amendment drawing into the kit. What is important to me is how they handle the situation from a customer service point of view.
24 March 2022 at 14:19 #591423
Matt Stevens 1
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@mattstevens1
Just as an update – Stuart have found some castings that are slightly bigger and are getting them in the post to me. Hence great service there….

However it does seem that most of the parts they have are similar to what i have….therefore i recommended a drawing amendment to prevent the problem in future.
25 March 2022 at 06:18 #591505
Hopper
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@hopper
Chances of a drawing amendment may be slim. Most of those drawings were done at some point in pre-history when there were people about who knew how to do such things. They are model kit suppliers these days, not designers.
25 March 2022 at 07:00 #591509
JasonB
Moderator
@jasonb
There are errata sheets supplied with some of the kits which address some errors, one problem with these is that if a kit passes through more than one pair of hands they can get lost or people are often asking for copies of drawings rather than pay for a set and may come by older drawings.

Funny how they have brought out a few new kit designs in the last couple of years, I assume someone has had to design those the 10V feed pump may even be drawn in CAD if the image is anything to go by

Edited By JasonB on 25/03/2022 07:01:57
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