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1970s Design Indulgence |
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Graham Slee 
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Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 15497 |
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 Posted: 03 Jun 2023 at 8:17am |
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Found a more affordable nutsert kit at shopfer... Edited by Graham Slee - 03 Jun 2023 at 8:20am |
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Graham Slee
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Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 15497 |
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Posted: Yesterday at 3:30pm |
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Drat! Setback = thickness + bend radius. How could it be any different? So, I'm pleased this is soft metal and the pan brake is really tough... So far I found it impossible to set the setback with an engineers rule. What is required is some sort of thickness gauge. Double drat! Obviously with the apron raised and the fingers clamping the correct material (but set under a little), it requires an offcut of the same material plus the bend thickness, from the bending tables, and the setback adjusted so they're only just nipped. So where do I get a 0.6mm thickness? Feeler gauges! Except that I gave up car servicing ages ago and I have a diesel. Bezos to the rescue (triple drat). Hopefully the Draper feeler gauge set will arrive by 1pm tomorrow. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Graham Slee
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Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 15497 |
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Posted: Yesterday at 7:16pm |
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Impatient as always, I found sufficient shim material to make 1.85mm and set the setback against it. I scribed a line 4.76mm off the Vernier from the 1.2mm 1050 aluminium offcut edge. I placed it by sight under the brake's fingers, clamped it firm and hoped for the best. I rotated the apron about 3 degrees over 90 on the Trend magnetic angle gauge to ensure a 90 degree bend. It turned out to be about 93 degrees outside angle and so I'll not over-rotate in future! After coaxing it back on the edge of my desk, I then measured the internal and external fold dimensions. It was over at 5.15mm. 5.00mm intended.  Internal, it was 4.00mm. 3.8mm intended.  My measurement accuracy must therefore be in the order of 0.05mm (2 thou). The internal measurement used the Vernier's step measuring faces which is round the back.
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