Instructables
Picture of Timing gear and chain clock - almost free!
Hopefully when you changed your car's timing set, you didn't toss the old gears and the chain.  I almost did, but my wife showed me this: http://www.uncommongoods.com/product/auto-timing-chain-and-gears-wall-clock

$125 US plus shipping.  Right.

So I decided to kludge this together for my brother's 40th birthday.

Bonus: you don't need to weld a thing! Although I'm a welder, I like the idea of the gears and the chain suspending each other.  Besides, if your car used a belt, you wouldn't be able to weld them, since the belt is made of rubber and twigs and cat pelts.

 
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Step 1: Parts

Timing gear set: crank gear, camshaft gear and timing chain (free or cheap)

Clock movement kit with hour and minute hands ($8.00 US online) - This one has a 5/8" shaft and Maltese cross hands.

AA battery (depends on your clock movement) ($1.00 US, or less)

optional:
second hand for clock

clock's wall-mounting bracket

paint(s) and primer of your choice - spray paint is the easiest

masking tape and razor blade
                
nail or screw from which to hang the crank gear (the smaller of the two gears)

1/2" to 5/8" thick spacer for the nail or screw (to offset the thickness of your clock movement's plastic case

self-adhesive numbers or dots

sparkly things

Step 2: Tools and supplies

small wrench or socket - to tighten clock shaft nut to gear (gently!)

wire to hang chain and gears to dry

latex or nitrile gloves

clean lint-free towel or rag

wax/grease remover for paint prep, such as DX-330

large washer, stainless - to tighten clock shaft nut against face of cam gear

optional:
bushing - to center clock's shaft in center hole of cam gear (11/16" O.D x 5/16" I.D x 1/2" tall in my case)

paint - I used Rustoleum's Sunrise Red, gloss black, and Plastikote's clear gloss spray cans

wax paper - to set clock hands on for painting

heater to dry paint

clean brush to degrease parts

hammer to drive the nail into your wall


Doesnt the inside part for the clock kit have to match the size for it to fit in the cam shaft gear?
streetrod5 (author)  samtrujillo12 months ago
I'm not sure what you mean, can you be more specific? The shaft of the clock movement/kit has to be smaller than the cam shaft gear - if the difference between the cam gear hole and the clock shaft is more than 3mm or 1/8 inch, you may choose to find a bushing to make up that difference.
shazni1 year ago
boys would love this! thanks :-)
This looks so cool! great work :)
streetrod5 (author)  Muhaiminah Faiz1 year ago
Thank you! I had fun.
voted! hope you win :)
kooth1 year ago
This is great! As others have said, I love your humor! Great job!
streetrod5 (author)  kooth1 year ago
Thank you, kooth!
67spyder1 year ago
Love the clock! The timing belt you refer to is one of the high quality ones, others, are made of yak dung and dried monkey snot LOL
streetrod5 (author)  67spyder1 year ago
Oh yes, 67spyder, those are the belts to avoid; I believe they are imported from Yakistan.
Exocetid1 year ago
Once again we have a craft project not unlike the one where a guy put a clock module on the insides of a disk drive. When I saw that clock my first thought was, "Wow, he motorized the part to yield a clock!," which is not what was done. Again, seeing this one I thought the same thing was done. You could have motorized the chain and gears to repurpose them into a clock since the mechanical demands of a clock are far less than that of an engine. These sorts of Instructables should come with a warning or disclaimer that they do not teach anything novel other than adding a clock module to an interesting piece of hardware destined for discard--a craft project.
streetrod5 (author)  Exocetid1 year ago
Exocetid, there are so many fantastic and interesting Instructables on this site; I am honored that you took the time to view mine and to add your comment. Obviously you are more experienced at this; if you have a better idea for the title, or for a disclaimer to warn folks away, I will certainly take it into consideration. I don't have the technical know-how (or the cash) to build one of those motorized chain clocks.  I have seen a couple of them here, including SteveMoseley's excellent build.

Perhaps you would prefer this clock: http://www.instructables.com/id/Make-a-Customized-Clock-that-Runs-Backwards/

Have a great day!
Frankly, I do not think we are talking a lot of money here. The trick is to retain something of the original functionality of the discarded parts repurposed into something new. 

I sense you were a bit put-off from my comment and I apologize. It is a fine Instructable as far as arts and crafts. 

SteveMoseley's chain clock is not quite the same thing. He produced a novel and very clever design for a clock using chains. For your clock, you should consider using the gears as time indicators and the chain as a connective mechanism--that has not been done here.

Many, many people have put clock modules into discarded items, again, a great crafts project.
The two gears are not in the 12:1 ratio that would be best for a clock. It would be great if:
There was a gear set in 12:1 ratio. The small gear could rotate once an hour, the large one once every 12.
There was a timing chain in 12:1 ratio w/ the gear. The gear could rotate once an hour, the chain would complete a revolution every 12. An enclosed and lubricated installation would be best to keep the chain from rusting and being a dust magnet. A sufficiently powerful motor/gearset that turned precisely once per hour would be best to drive it.
streetrod5 (author)  moon1611 year ago
moon161, you have some good ideas; I'm not the brightest hammer in the box of rocks, but someone else on Instructables will eventually figure this out! That will be fun to see.
That is indeed the dilemma here, my comment was looking for something as you describe where the small gear rotated and between it and the large gear, using hands and or pointers with markers, the time would be displayed. A challenge for sure.

One easy "cheat" that would take it out of what I call the crafts domain would be to motorize the small gear allowing it to drive the large one in the same configuration that streetrod5 teaches and then put the clock module in a bearing with a weight to keep it upright while the large gear turns. It would look just like his, but everything would move.
gwlannog1 year ago
Probably the best thing about this site is that it caters for all levels of ability and knowledge, from the most basic to stuff that is highly technical and often very innovative. You can try different things and develop your own skills. So I think well done for your clock, it is within my comfort zone and I can afford to make it, which is just as important for many of us. Thank you.
streetrod5 (author)  gwlannog1 year ago
gwlannog, thank you for your nice comment.
Nice one! And "cat pelts" - things like this is why I should never drink coffee and at the computer, now where are those paper towels? :D
streetrod5 (author)  computurwizard1 year ago
Thank you! I had a lot of fun with this one.
great write up, humorous, too.

I wonder if using an air compressor to blow the solvent and oil out of the chain would work? I suppose you'd want to do that outside or in a cardboard box to contain the mess.
streetrod5 (author)  stresssolutions1 year ago
Yes, that works pretty well. There always seems to be a droplet of solvent hiding in the nook or the crannie. A heat gun or blow dryer could be used too.
harthoppy1 year ago
Wondering how hard would it be using the concept of the "outside " cog of the clock moving , thus showing the time that way ?
streetrod5 (author)  harthoppy1 year ago
http://www.instructables.com/id/How-to-build-a-Chain-Clock/

Sort of like SteveMoseley's build, maybe?  I thought about using a microwave oven turntable motor to rotate the smaller gear, which would have moved the chain and the cam gear.  That's as far as my brain went; the rest is beyond my expertise.  I found another really good clock on here that ran on a bicycle chain and gears, and the numbers were attached to the chain, but I looked all morning and can't find that one.
harthoppy1 year ago
Very well done ! Love the humor in it also!
streetrod5 (author)  harthoppy1 year ago
Thank you for your nice comment.
Nice clock!
streetrod5 (author)  FoamboardRC1 year ago
Thank you for checking it out
RangerJ1 year ago
That's a nice project.
streetrod5 (author)  RangerJ1 year ago
Thank you, RangerJ
Nice job, man!!
streetrod5 (author)  andreyeurope1 year ago
Thanks, andrey, I appreciate it.
amcayanan1 year ago
AWESOME!
Thanks for sharing streetrod5
streetrod5 (author)  amcayanan1 year ago
Thank you, amcayanan! It was fun.
oXYd1 year ago
I'm in!
prestux1 year ago
Nice.
Ive seen furniture made from other automotive parts such as pulleys and camshafts/crankshafts, this clock would make a great addition to any such industrial themed "Man Cave."
streetrod5 (author)  prestux1 year ago
prestux, thank you for your kind words. I think you're right; maybe we need a "Man Cave" category!