smallbrother
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Post by smallbrother on Sept 17, 2019 14:01:40 GMT
I need to red line the gauge on my 7.5 Bagnall.
In the past I have taken gauges apart and put a line inside.
There must be something that will stick to the glass - anyone got ideas?
Pete.
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uuu
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Post by uuu on Sept 17, 2019 14:25:03 GMT
Nail varnish?
Wilf
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Post by simplyloco on Sept 17, 2019 14:39:36 GMT
Acetone?  John |
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mbrown
Elder Statesman
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Post by mbrown on Sept 17, 2019 15:33:34 GMT
The problem with marking the glass is that you are likely to get an increased parallax error as the needle is further from the glass than the scale...
Malcolm
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flyingfox
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Post by flyingfox on Sept 17, 2019 16:07:49 GMT
And the glass can rotate, not a good idea.
I thought that this method of gauge marking was banned by the powers that be?
regards
Brian
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Post by GWR 101 on Sept 17, 2019 17:19:31 GMT
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JonL
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WWSME (Wiltshire)
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Post by JonL on Sept 17, 2019 19:51:11 GMT
Our boiler inspector recently politely rejected a locomotive boiler for having the line marked on the glass. However in this case the glass was able to rotate a little and therefore the reading changed.
When I was in flight test I used to mark gauges from scratch. We used letraset.
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Post by GeorgeRay on Sept 17, 2019 20:23:04 GMT
Pete
Marking on the glass is not permitted. If you cannot mark the dial a mark on the bezel is the only permitted alternative and then only if the bezel cannot rotate.
George Ray
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Post by springcrocus on Sept 17, 2019 20:52:00 GMT
Acetone? John  Steve |
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on Sept 18, 2019 9:32:15 GMT
OK. Plan B it is!
Pete.
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Post by keith6233 on Sept 18, 2019 9:41:44 GMT
A slither of red sticky tape on the dial. |
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Post by delaplume on Sept 20, 2019 7:37:16 GMT
Pete Marking on the glass is not permitted. If you cannot mark the dial a mark on the bezel is the only permitted alternative and then only if the bezel cannot rotate. George Ray Hello all---------Thank you George...I think that must be the definitive answer then... |
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on Sept 20, 2019 16:34:34 GMT
I have put a thin strip of red sticky tape on the bezel.
See how long it lasts.
Pete.
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Post by delaplume on Sept 20, 2019 18:59:02 GMT
I have put a thin strip of red sticky tape on the bezel. See how long it lasts. Pete. Maybe some clear varnish to secure it ?? |
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on Sept 21, 2019 8:07:32 GMT
I have put a thin strip of red sticky tape on the bezel. See how long it lasts. Pete. Maybe some clear varnish to secure it ?? I'm thinking keep the tape in my toolbox and stick some more on! Pete. |
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Midland
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Post by Midland on Sept 23, 2019 9:58:57 GMT
Our boiler inspector recently politely rejected a locomotive boiler for having the line marked on the glass. However in this case the glass was able to rotate a little and therefore the reading changed. When I was in flight test I used to mark gauges from scratch. We used letraset. I was told that if you do mark the glass make sure the mark goes onto the body of the gauge you can verify that the glass has not moved. Not the best of worlds of course. D |
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denis M
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Post by denis M on Sept 23, 2019 13:45:10 GMT
I use automotive pin stripping tape as it sticks well on the face of the dial and is easily removed if needed. Also the thickness of the tape is exactly 10 PSI on my gauge.
Denis M
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Post by delaplume on Sept 23, 2019 14:59:37 GMT
From George Ray earlier on}-----"Marking of the glass is not permitted".....
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Post by Cro on Sept 23, 2019 15:51:58 GMT
Sorry have I missed something, Pete whats wrong with just marking the dial? If it were me I would deem tape on the bezel, and on the dial personally, as bad as marking the glass as it can easily peel off.
I see the only proper solution on this is red paint line on the gauge dial and its fairly simple to do.
Adam
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uuu
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Post by uuu on Sept 23, 2019 16:25:50 GMT
The Pumphouse team have found a number of gauges with bezels that are very reluctant to come off. They do give way eventually, but it can be a bit fraught trying to do it without damage.
Wilf
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