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Making an alloy gear knob, help needed

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petro1head01/01/2018 13:25:34
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I want to make something like this **LINK**

I know how to up to a point but am struggling once I have made it how to drill the hole and thread it without damaging it.

Any suggestions, looked to YouTube but could not find anything

Tony Pratt 101/01/2018 13:28:07
916 forum posts
3 photos

I suggest tapered soft jaws or tapered split bush.

Tony

Edited By Tony Pratt 1 on 01/01/2018 13:28:47

Swarf Maker01/01/2018 13:31:43
78 forum posts
4 photos

I would have thought that the hole and thread is the starting point and from which you hold the raw stock to do the shaping operations. i.e threaded onto an arbor.

Malc01/01/2018 13:32:16
60 forum posts
5 photos

I think I would be looking to drill and tap the blank first, mount it on a matching threaded shaft. You could then hold the shaft in the chuck and turn the shape of the knob.

ASF01/01/2018 13:34:03
130 forum posts
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Yep, drill and tap then turn taper on threaded arbor then use ball turner and shape end over

Neil Wyatt01/01/2018 16:43:09
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Damn.

As a teenager and before I ever had a driving licence, let alone a car, (probably 17th birthday) my parents gave me a leather gear knob with a sterling silver insert.

If I could find it, I could fit it to my car, just nearly four decades late

JasonB01/01/2018 17:01:59
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As said drill, tap and cut the taper then screw it onto something while you round the end.

They are not the nicest things to use, my Ltd Edition Scooby has one, if it has been sitting in the sun you can't touch it and in winter it is like holding a block of ice.

petro1head01/01/2018 17:50:05
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609 forum posts
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It’s not for a car but a racing sim Ihave in the loft.

Can’t decide if it’s the correct one, or should I make it out of nylon instead of ally

petro1head01/01/2018 17:50:44
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609 forum posts
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Posted by Neil Wyatt on 01/01/2018 16:43:09:

Damn.

As a teenager and before I ever had a driving licence, let alone a car, (probably 17th birthday) my parents gave me a leather gear knob with a sterling silver insert.

If I could find it, I could fit it to my car, just nearly four decades late

Very retro

not done it yet01/01/2018 19:19:09
3494 forum posts
15 photos

So retro that it would likely need a thread on the forum of how to hold it while cutting a metric thread (to replace the imperial one) without damaging it.smiley

JasonB01/01/2018 19:24:39
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I bet Neil has also got the crochet backed driving gloves and cravat tucked away somewhere safe toosmile p

petro1head01/01/2018 19:40:03
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He probably also has bead seat covers

Neil Wyatt01/01/2018 20:21:40
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Posted by JasonB on 01/01/2018 19:24:39:

I bet Neil has also got the crochet backed driving gloves and cravat tucked away somewhere safe toosmile p

I think they are under the fluffy dice

I accept no gip from someone with gold alloys!

Neil

Ian S C02/01/2018 10:27:03
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7447 forum posts
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I suspect that the nylon / plastic on would be comfortable to the hand, it might be worth making a threaded brass insert with a parallel knurled outside to it, pressed into the nylon knob. Set up the hole first, and screw this on a short bit of thread, hold in the lathe chuck and turn the taper, then rough out the hemisphere and finish with a hand scraper as used in wood turning.

Ian S C

petro1head02/01/2018 12:01:52
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609 forum posts
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Posted by Neil Wyatt on 01/01/2018 20:21:40:
Posted by JasonB on 01/01/2018 19:24:39:

I bet Neil has also got the crochet backed driving gloves and cravat tucked away somewhere safe toosmile p

I think they are under the fluffy dice

I accept no gip from someone with gold alloys!

Neil

And what is wrong with gold alloys

img_0553.jpg

petro1head02/01/2018 12:02:26
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609 forum posts
112 photos

Well have enjoyed making my new knob

20180102_114922.jpg

not done it yet02/01/2018 12:33:41
3494 forum posts
15 photos

You got your lathe in your bedroom? Or aquick recovery from you sick bed, yesterday!smiley

Old Elan02/01/2018 12:40:25
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And what is wrong with gold alloys

Absolutely nothing!

elan89.jpg.jpg

petro1head02/01/2018 13:54:11
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609 forum posts
112 photos
Posted by not done it yet on 02/01/2018 12:33:41:

You got your lathe in your bedroom? Or aquick recovery from you sick bed, yesterday!smiley

Its just man flue so was sick of bed and decided to take my mind off it yt playing in the workshop with the heater full blast

Edited By petro1head on 02/01/2018 13:54:45

Swarf, Mostly!02/01/2018 13:58:42
498 forum posts
41 photos
Posted by petro1head on 01/01/2018 17:50:05:

It’s not for a car but a racing sim Ihave in the loft.

Can’t decide if it’s the correct one, or should I make it out of nylon instead of ally

I'm quite happy with the knob that Citroen provided (234,000-ish miles on the clock).

But, were a replacement ever needed, it would be a choice between fabric-based Tufnol or some off-cuts from an ex London Underground railway sleeper, Jarrah wood, polishes and waxes up nicely to a rich deep red/brown.

Best regards,

Swarf, Mostly!

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