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5 speed knob reproduction?


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GongZ,

Here is a snapshot of the eBay listing for the acrylic watch dome to make this thread longer lasting. Great idea on using a router! Nice graphic showing the process of making a map.

Mike

post-18366-14150820979774_thumb.jpg

Edited by Mikes Z car
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Hi all,

My idea for the badge is to use a piece of clear plastic and engrave it on a CNC router (I have ordered a Chinese made one for other purposes). This would allow an accurate reproduction of the raised letters and shapes.

Cheers

Ian

This has been my plan from day1-just as Carl said-cut from one thick piece of Acrylic-just waiting on tiny(I mean seriously small-I believe they are being made specifically for me) router bits to make the corners of the numbers sharp instead of rounded. I want it to look exactly right, not "good enough".

If that does not work, I will use my cnc milling machine to mill a mold in some fortal, and cast them.

Pocket cutting always gives the inside "corners" of the pockets the radius of the tool used to cut the pocket-instead of a sharp corner-doing the final cuts with a fine diameter tool will lower that radius-hopefully to unnoticeable, but fine milling plastic with such a small bit may not give acceptable results-even with good sized bits plastic likes to melt/burn with high speed tools.

In the alternate method I can get as sharp an edge as I want on a corner, while it will still be pocket cutting, the areas that need to be sharp have room for crossing cuts to produce sharp(er) edges.

FWIW

Will

Edited by hls30.com
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post-26437-14150821040192_thumb.jpgI purchased one of those fat shiny knobs but it just doesn't feel good in my hand and when I saw this thread I got an idea.

Found an old metric bolt that fit it, cut off the head mounted it in the drill press. Using a coarse file and 4 different grades of sand paper brought it down to this, not really original looking but much more comfortable and I can see and feel the wood grain now.

post-26437-14150821039634_thumb.jpg

post-26437-14150821039968_thumb.jpg

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  • 3 weeks later...

I wonder if it'd be simpler/better to have the shift map stamped in metal. No worries about it breaking, could be painted to owner's taste, and topped with the watch bevel or a clear filler.

http://www.universalmarking.com/dies.html

http://www.pryormarking.com/marking-products/engraved-dies/embossing-a-debossing-dies.html

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Hi again all,

Firstly, I take all of your points WIll. I have only just received my (faulty so far) CNC machine, so I have nil experience with milling plastics .

I look forward to hearing how your experiments proceed.

On a related issue;

Does anyone have an original 'skinny' 4 or 5 speed knob and an accurate way of measuring the wood section?

I bought a new "Genuine Nissan" 4 speed shift knob and I would like to either reshape this knob (using grannyknot's clever drill press approach) or make a new wood section.

This diagram shows what I (and others I assume) would like to have measurements for.

post-22920-14150821407604_thumb.jpg

I hope someone can help out.

Cheers

Ian

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Hi again all,

Firstly, I take all of your points WIll. I have only just received my (faulty so far) CNC machine, so I have nil experience with milling plastics .

I look forward to hearing how your experiments proceed.

On a related issue;

Does anyone have an original 'skinny' 4 or 5 speed knob and an accurate way of measuring the wood section?

I bought a new "Genuine Nissan" 4 speed shift knob and I would like to either reshape this knob (using grannyknot's clever drill press approach) or make a new wood section.

This diagram shows what I (and others I assume) would like to have measurements for.

[ATTACH=CONFIG]58336[/ATTACH]

I hope someone can help out.

Cheers

Ian

Ian-G'day Mate!

If no one beats me to it I'll measure and post all of it later today. I moved my Mill/Drill/Lathe last weekend, and still have a healthy amount of putting it back together and recalibrating to do to bring it operational-and with the heart of the holidays here, I don't know how much time I'll have to put into this over the next 35 days. I have had several knobs disassembled waiting for me to get time-it looks like I am still time challenged-so I will take the measurements and post them for you.

My intention was to restore used, original knobs by replacing /refinishing what needed it, and keeping what didn't-a properly restored piece is more valuable to me than an all new reproduction.

I don't think making everything new represents any challenge-other than actually matching the original wood species.

I planned to have two sift knobs for my Z-one restored original, and one original knob resto-modded with the metal emblem from a later knob.

Will

Edited by hls30.com
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I found my original notes on this!

There is a little variation between the three examples I originally measured, but middle measurements are:

W1 1.510"

W2 1.095"

W3 1.061"

H1 1.755"

H2 1.225"

I measured the insert as well if you need it.

Will

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and one original knob resto-modded with the metal emblem from a later knob.

That's pretty much what I ended up with. One thing to watch for is that the metal cloisonné style maps are a little smaller in diameter than the plastic ones. That's the reason for the flat ring at the top of my knob. I modeled my wood just like the original wood knobs, but with the shift map smaller, you end up with a narrow flat. If the map were slightly larger in diameter, then the flat width would be reduced:

2done1.jpg

It doesn't bother me and I didn't even realize it until I went back through this thread and looked at the other five speed knobs.

The point is, that if you're trying to put the cloisonné map into an older knob, you'll have to deal with the moat around the edge where the new map rattles around in the larger opening.

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That looks just about like I envisioned it-Sharp! My plan for the space between the 5 speed metal emblem and the existing opening was to machine a stepped ring to fill the space with-and to give the emblem a concentric circle similar to the one the plastic emblem and the metal 4 speed emblem have-I also considered removing the glass, and filling the recessed area of the emblem with body color matched paint.

Edited by hls30.com
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  • 3 months later...

Here are some pictures for the original green 4 speed knob. I know it's not the 5 speed but this could help those that want original 4 speed knobs.

The picture of my original that came with my car 11/75 - 76 280, a picture of the new (looks never used) insert I purchased on Ebay last week. I also made a drawing from the new one. Hope this helps someone.

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post-13827-14150823453892_thumb.jpg

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Here is the knob I was referring to, it was off of a 75 Fairlady Z. Looks just like the wood USDM 4 speed that came on the 240z, but with a 5th speed on it. I believe the seller is on this site, but this is the only picture I have that the seller sent me of the knob before it broke. I have a friend that has a nice one I will see if he can post it later.

[ATTACH=CONFIG]57175[/ATTACH]

I have three of these knobs. They came with the Aussie cars which all had 5 speeds. You may want to ask around here. I bought the last one for $15. Happy to post detailed pics if wanted.

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I wonder how many of those $200 5spd shift knobs they sell each year? It is pricing like that keeps people away from these cars along with the fact that many of the parts owners really need are no longer made. Absolutely disappointing! GM and Ford support almost all of their classic cars either by still offering many parts at dealerships or allowing companies to re-produce parts. Nissan needs to get it over itself and either truly support their classic cars with in stock parts at reasonable prices or let other companies do it for them like MSA, Classic Datsun, and the like.

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I wonder how many of those $200 5spd shift knobs they sell each year? It is pricing like that keeps people away from these cars along with the fact that many of the parts owners really need are no longer made. Absolutely disappointing! GM and Ford support almost all of their classic cars either by still offering many parts at dealerships or allowing companies to re-produce parts. Nissan needs to get it over itself and either truly support their classic cars with in stock parts at reasonable prices or let other companies do it for them like MSA, Classic Datsun, and the like.

Get over itself? The thing is, Nissan doesn't need to do anything. Are you suggesting Nissan tools up for tiny production runs of parts for cars they made 40 years ago? That's never going to happen.

It's all about the market. Compare the production numbers of Mustangs to the S30 and you'll have the answer of why they're better supported.

With that said, there are reproductions being made for plenty of Z parts, just look at MSA's site. I don't think Nissan is stopping anyone. I also don't think a $200 shift knob on ebay keeps people away from these cars. Frankly, the cheap price of entry into the Z-world reflects the opposite and thus the Z populace generally seems notoriously cheap (compared to other vintage car owners).

I wouldn't mind prices of Z parts going up at all, it'll make my hoard more valuable. LOL

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I wonder how many of those $200 5spd shift knobs they sell each year? It is pricing like that keeps people away from these cars along with the fact that many of the parts owners really need are no longer made. Absolutely disappointing! GM and Ford support almost all of their classic cars either by still offering many parts at dealerships or allowing companies to re-produce parts. Nissan needs to get it over itself and either truly support their classic cars with in stock parts at reasonable prices or let other companies do it for them like MSA, Classic Datsun, and the like.

The biggest issue with that knob for me is that it although it may be Nissan, it is clearly not a period knob - the original knobs were much narrower. A period knob recently went for $400 on Yahoo Japan.

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  • 9 months later...

Anyone have an update? I mailed the remains of my 5 speed to one of the members here soon after I started this thread with promises of close to finishing the final product/restoring my own and using it to display the reproduction, but I have not heard back or had my last 2 PMs replied to since. Any luck OILUJ?

Edited by Decoy12
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Made two more attempts at reproducing a decent insert that failed.

I'm working on getting access to another 3D printer to make a "positive" from polyurethane, from which I could make a soft silicone mold.

I looked into having a custom prototyping shop print one, but the cost was prohibitive.

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  • 4 months later...
Get over itself? The thing is, Nissan doesn't need to do anything. Are you suggesting Nissan tools up for tiny production runs of parts for cars they made 40 years ago? That's never going to happen.

It's all about the market. Compare the production numbers of Mustangs to the S30 and you'll have the answer of why they're better supported.

With that said, there are reproductions being made for plenty of Z parts, just look at MSA's site. I don't think Nissan is stopping anyone. I also don't think a $200 shift knob on ebay keeps people away from these cars. Frankly, the cheap price of entry into the Z-world reflects the opposite and thus the Z populace generally seems notoriously cheap (compared to other vintage car owners).

I wouldn't mind prices of Z parts going up at all, it'll make my hoard more valuable. LOL

I wouldn't mind prices going up to...

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  • 2 weeks later...
Was this made by anyone here? I ran into this ebay auction by chance... Wish there were more pictures. I haven't pulled the trigger... yet.

Datsun 240Z 260z 280z Reproduction Shift Knob 5 Speed Walnut | eBay

[ATTACH=CONFIG]72407[/ATTACH]

I've seen that and whilst it's would pass as original to most, I feel it's not quite there. The lower metal pice at the base of it isn't the same size or shape. The thickness of it is different to the original. So really the only thing it has in common with an OEM 1 is the 5 speed button design.

Price wise though it's very reasonable.

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