Talk:Bulldozer Geardown: Difference between revisions
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for example. laser cut a sprocket like | for example. laser cut a sprocket like | ||
[http://www.amazonsupply.com/martin-roller-sprocket-hardened-bushing/dp/B00452UR48/ref=sr_1_1_child?sr=1-1&qid=1370463713&filterBy.feature_nine_browse-bin=5038521011&filterBy.size_name=100&filterBy.number_of_teeth=11 this] and mount it on a store bought [http://www.grainger.com/Grainger/TB-WOODS-Quick-Detachable-Bushing-10Y304?Pid=search bushing]. | [http://www.amazonsupply.com/martin-roller-sprocket-hardened-bushing/dp/B00452UR48/ref=sr_1_1_child?sr=1-1&qid=1370463713&filterBy.feature_nine_browse-bin=5038521011&filterBy.size_name=100&filterBy.number_of_teeth=11 this] and mount it on a store bought [http://www.grainger.com/Grainger/TB-WOODS-Quick-Detachable-Bushing-10Y304?Pid=search bushing]. | ||
== Spur gears == | |||
I didn't see anything on the wiki about the pros/cons of cutting our own spur gears. The advantage of this would be a reduced size of the module. I don't have any resources on the stress calculations involved in that operation. I assume off-the-shelf roller chain and sprockets would be stronger than spur gears that we make ourselves, but I am only assuming. | |||
Basic process: | |||
*Make an involute cutting tool on a lathe | |||
**Need a button cutter for this | |||
*Mount the cutter on a vertical mill and use a dividing head index while cutting the teeth. | |||
*Harden | |||
A single tooth cutter would be easier to make than a multi-tooth cutter but it might not last for all 8(?) gears needing to be cut.<br/> | |||
{{YoutubePopup|7zMgJXMHcNs}} | |||
Video showing a homemade cutter being made. | |||
<br/> | |||
Spur gears could be completely encased in oil. | |||
Again, I want to know why we can't/shouldn't do it this way. | |||
<br/> | |||
[[User:Aidan Williamson|Aidan Williamson]] ([[User talk:Aidan Williamson|talk]]) 17:51, 31 March 2014 (CEST) | |||
Minimum teeth count for a spur gear should be 12; maximum ratio of a pair is 1:5. ([http://www.physicsforums.com/showthread.php?t=704162 source). [https://www.youtube.com/watch?v=8bml2pK6Ra0 Spur Gear Design Video]. | |||
[[User:Aidan Williamson|Aidan Williamson]] ([[User talk:Aidan Williamson|talk]]) 18:25, 31 March 2014 (CEST) | |||
Latest revision as of 16:25, 31 March 2014
sprocket options
laser cut
i think it might be interesting and worthwhile to see if a laser cut sprocket mounted on a QD bushing would be functional for a short period. might need like a grinding process to bevel the teeth. seems like it will need to be explored as a long term goal anyway. --Dorkmo (talk) 05:17, 11 June 2013 (CEST)
for example. laser cut a sprocket like this and mount it on a store bought bushing.
Spur gears
I didn't see anything on the wiki about the pros/cons of cutting our own spur gears. The advantage of this would be a reduced size of the module. I don't have any resources on the stress calculations involved in that operation. I assume off-the-shelf roller chain and sprockets would be stronger than spur gears that we make ourselves, but I am only assuming. Basic process:
- Make an involute cutting tool on a lathe
- Need a button cutter for this
- Mount the cutter on a vertical mill and use a dividing head index while cutting the teeth.
- Harden
A single tooth cutter would be easier to make than a multi-tooth cutter but it might not last for all 8(?) gears needing to be cut.
http://img.youtube.com/vi/7zMgJXMHcNs/default.jpg
Video showing a homemade cutter being made.
Spur gears could be completely encased in oil.
Again, I want to know why we can't/shouldn't do it this way.
Aidan Williamson (talk) 17:51, 31 March 2014 (CEST)
Minimum teeth count for a spur gear should be 12; maximum ratio of a pair is 1:5. (source). [https://www.youtube.com/watch?v=8bml2pK6Ra0 Spur Gear Design Video.
Aidan Williamson (talk) 18:25, 31 March 2014 (CEST)