Well hey, if you've got a new batch, I'll have to order one from you once it's time to take care of the oil pump
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| Tempering a gear? https://www.slantsix.org/forum/viewtopic.php?t=5954 |
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| Author: | Jopapa [ Sun Jun 08, 2003 3:13 pm ] |
| Post subject: | Tempering a gear? |
The other day I was tempering the blade for an old Army knife that i got at an antique store, and I was wondering, since Doc's hardened gears aren't available anymore (at least from last I had heard), if it'd be possible to get steel gears and temper those for some extra reliability. Thoughts? |
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| Author: | Doctor Dodge [ Mon Jun 09, 2003 12:11 am ] |
| Post subject: | We Have Hardened Gears... |
We just heat treated a new batch so I have hardened gears for sale. You can also make your own but it's a lot of work. DD |
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| Author: | Jopapa [ Mon Jun 09, 2003 10:42 am ] |
| Post subject: | |
Well hey, if you've got a new batch, I'll have to order one from you once it's time to take care of the oil pump
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| Author: | Jopapa [ Tue Jun 10, 2003 4:05 pm ] |
| Post subject: | |
BTW how much work would it take to harden a gear myself? When I do blades I heat 'em up with a blowtorch and dunk 'em in ice water about a dozen or so times. Is that similar to the method you use Doc? |
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| Author: | Doc [ Tue Jun 10, 2003 4:39 pm ] |
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Quote: BTW how much work would it take to harden a gear myself?
The big difference between what we are doing is the material type.When I do blades I heat 'em up with a blowtorch and dunk 'em in ice water about a dozen or so times. Is that similar to the method you use Doc? Your blades are made of high carbon steel, the Slant Six oil pump gear is made of cast iron. The goal with these gears is to put a hard "skin" on the surface while keeping the core soft, this keep the gear from shattering. I use a professional heat treater to do the carburizing process. They heat the gears up to 1600 degrees in a carbon rich atmosphere so the surface "soaks-up" more carbon. After that, the parts are tempered, I think they heat and then dunk them in a special oil bath, I'm not sure what that does to them. DD 
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| Author: | DusterIdiot [ Tue Jun 10, 2003 4:45 pm ] |
| Post subject: | Oil bath... |
I remember reading about oil bathing parts after heating or welding to keep the temperature uniform and slowly cool them rather than quenching them out it. I've used the same type of technique when welding up a 'backyard posi' for demo derby, it does keep the spider gears from becoming too brittle after so much heat and shattering on take off.... that's just my thought... -D.Idiot |
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| Author: | Jopapa [ Wed Jun 11, 2003 12:49 am ] |
| Post subject: | |
Quote: Quote: BTW how much work would it take to harden a gear myself?
The big difference between what we are doing is the material type.When I do blades I heat 'em up with a blowtorch and dunk 'em in ice water about a dozen or so times. Is that similar to the method you use Doc? Your blades are made of high carbon steel, the Slant Six oil pump gear is made of cast iron. The goal with these gears is to put a hard "skin" on the surface while keeping the core soft, this keep the gear from shattering. I use a professional heat treater to do the carburizing process. They heat the gears up to 1600 degrees in a carbon rich atmosphere so the surface "soaks-up" more carbon. After that, the parts are tempered, I think they heat and then dunk them in a special oil bath, I'm not sure what that does to them. DD 
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