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20th Apr 2019, 9:25 pm | #1 |
Heptode
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
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“Spun” knob inserts
Had a go at making some knob inserts.
Only 15 though thick but had a sharp little parting tool and some nice ally bar. They look a bit “new” but will dull down with age |
21st Apr 2019, 8:41 am | #2 |
Octode
Join Date: Mar 2015
Location: Yorkshire, England.
Posts: 1,301
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Re: “Spun” knob inserts
As an apprentice at Ferranti's l would have knocked out a few dozen of these on a Saturday morning when the "important" jobs got done.
Those look very good and would completely fool me from across a room.
__________________
Regards, Ken. BVWS member |
22nd Apr 2019, 8:05 am | #3 |
Heptode
Join Date: Jun 2006
Location: Eindhoven, Netherlands.
Posts: 642
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Re: “Spun” knob inserts
Great job!
How did you make them? Jac |
23rd Apr 2019, 11:07 am | #4 |
Octode
Join Date: Apr 2007
Location: Hampshire, UK.
Posts: 1,577
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Re: “Spun” knob inserts
Here are some I made for a Roberts R606MB (picture attached). One of the push button ones and one of the tone control ones are original, the rest are home made. In my case I bored the knobs out a little so that the metal could be left thicker, that made parting them off a bit easier.
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23rd Apr 2019, 8:59 pm | #5 |
Heptode
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
|
Re: “Spun” knob inserts
Jac.
I turned a length of free machining aluminium bar down to the right diameter. Faced it off with a sharp lathe tool and played about with the feed until the surface looked right, then with a parting tool, parted thin “slices” off at the correct thickness |
24th Apr 2019, 6:56 am | #6 |
Heptode
Join Date: Jun 2006
Location: Eindhoven, Netherlands.
Posts: 642
|
Re: “Spun” knob inserts
Thanks!
The end result looks excellent. Jac |