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Switchmaster knob

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Post by NeilH on Thu Nov 21, 2019 12:57 am

I got the knobs that knicelyr sent last week, but couldn't do anything with them because my gallbladder hose that day to go wonky.
They look great for rough casting. I can't wait to get back in the shop and have a go at them. I think they'll look great.
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Post by NeilH on Sun Feb 02, 2020 11:31 pm

I returned to working in my garage for the first time since my surgery. I could have earlier, but it was cold and I’m a wimp. The first job was to start the trim on the aluminum knobs that knicelyr made.
I made a holder out of foamed PVC board, then clamped the knobs in place. It worked a treat. Two of the knobs turned out great, but the 3rd had a void. When the drill bit caught the edge of the void it tore out a bit of unsupported material, so now there’s a hole on the surface. The drilled hole is a bit off-center, but it’s true, so the knob will still work. I can backfill it with epoxy and it’ll be fine. Next operation will be to drill & tap for set screws, then it’s back to the lathe to turn the surfaces. I’ve already prepared an arbor for that.
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Post by corsair on Mon Feb 03, 2020 1:57 am

Excellent!!

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Post by Sgt. Vimes on Mon Feb 03, 2020 2:00 am

Good stuff!
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Post by Barry on Mon Feb 03, 2020 2:17 pm

I'm constantly amazed (and greatly appreciative) of the talented folks who have shown up over the years in our little corner of the Internet to keep our guitar babies working.
Band
Another huge thank to you Rick for diving into all this and making it happen! Dance 1

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Post by knicelyr on Tue Feb 04, 2020 2:26 pm

Glad to see they are going to work!
That was a very bad pour Sad
But like Doritos, we can make more Smile
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Post by NeilH on Tue Feb 04, 2020 6:35 pm

It may not have been a void, but an imperfection in the alloy. The chips coming out were grainy and brittle once I got 5mm in. The others turned and drilled smoothly and made nice chips.
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Post by Westbone on Wed Feb 05, 2020 2:01 am

NeilH wrote:It may not have been a void, but an imperfection in the alloy. The chips coming out were grainy and brittle once I got 5mm in. The others turned and drilled smoothly and made nice chips.
Seems like a bit of 'slag' got in that one.
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Post by NeilH on Sun Feb 09, 2020 3:43 pm

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I got the knobs drilled & tapped and made some janky grub screws. I only scrubbed them with Scotch Brite, and didn't fill them with epoxy yet, but couldn't wait to see how they looked black. I used Birchwood Casey aluminum black, but didn't clean or prep it, an didn't didn't stick. It revealed more voids, but those won't show once they're painted black.

Neil
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Post by TFi2397856 on Sat Apr 04, 2020 4:05 pm

Do you have any more of these? Happy to buy a few from you.

Thank you
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Post by Purge on Thu Apr 09, 2020 4:59 pm

A long long time ago, on a website far away... I made some of these. I used silicon molds to make resin casts of the ones on my mint condition Super Headless bass, then milled out the centre for some suitable sized aluminium tube which was then drilled and tapped for the grub screw. Later found that a 6mm hole would give a really tight fit, no need for the grub screw. I have about 50 incomplete ones (Just need the pot shaft hole milled out), they are as close to perfect replicas as I could get. Let me know if you'd like them.





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Post by Sgt. Vimes on Thu Apr 09, 2020 5:04 pm

Purge wrote:A long long time ago, on a website far away... I made some of these. I used silicon molds to make resin casts of the ones on my mint condition Super Headless bass, then milled out the centre for some suitable sized aluminium tube which was then drilled and tapped for the grub screw. Later found that a 6mm hole would give a really tight fit, no need for the grub screw. I have about 50 incomplete ones (Just need the pot shaft hole milled out), they are as close to perfect replicas as I could get. Let me know if you'd like them.






I could do with 3 of those beauties if you please!
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Post by Purge on Thu Apr 09, 2020 5:17 pm

No problem - well slight one, can't remember your address. PM please.
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Post by corsair on Thu Apr 09, 2020 5:37 pm

Ahh.... I remember those!! I believe I have some on an instrument somewhere!!

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Post by knicelyr on Fri Apr 10, 2020 11:22 am

Purge,

I am doing similar, can you give me the details on the resin and dye you are using?
I would also like 3 of them.

Thank you,
Rick
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Post by Sgt. Vimes on Fri Apr 10, 2020 11:25 am

Purge wrote:No problem - well slight one, can't remember your address. PM please.

Sent a pm, in case you didn't see it Wink
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Post by Purge on Fri Apr 10, 2020 3:03 pm

knicelyr wrote:Purge,

I am doing similar, can you give me the details on the resin and dye you are using?
I would also like 3 of them.

Thank you,
Rick
Was using, this was years ago. All I can remember is I got the resin and dye from www.tiranti.co.uk . The resin warped a bit if the grub screw was overtightened, tried experimenting with cold metal casting (30% resin 70% iron filings IIRC) which was too brittle before I settled on the aluminiuminserts or a very slightly too small hole for the pot shaft. PM me your address and I'll send you a few.

Pete (Or should I say Sgt at arms Keel? Ook!) yours should be posted on Monday.
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Post by Sgt. Vimes on Fri Apr 10, 2020 3:18 pm

Thanks buddy!
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Post by Purge on Fri Apr 10, 2020 3:21 pm

Ook
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Post by Sgt. Vimes on Fri Apr 10, 2020 3:21 pm

Tuesday, it's Bank Holiday Monday Very Happy
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Post by Sgt. Vimes on Fri Apr 10, 2020 3:24 pm

Purge wrote:Ook

Very Happy
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Post by Purge on Fri Apr 10, 2020 3:36 pm

OOK!!!
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Post by Sgt. Vimes on Tue Apr 14, 2020 5:49 pm

Purge wrote:OOK!!!
knob - Switchmaster knob - Page 2 BG9J0aK
OOK OOK! 
Thanks buddy, these are incredible!
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