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Electronics => Projects, Designs, and Technical Stuff => Topic started by: dequo on April 08, 2011, 07:36:40 am

Title: looking for a long gear/extruded spur gear
Post by: dequo on April 08, 2011, 07:36:40 am
I need a long gear for a project, im sure theres a name for what i want but i havent been able to find anything.

It needs to be like a cylinder with teeth going lengthways, the opposite of a worm gear almost. the rest of the project can be adapted to its pitch diameter etc. Preferably a diameter of 35mm and about 10cm long.

i have though of getting it custom made but im sure somebody would sell something like this..
Title: Re: looking for a long gear/extruded spur gear
Post by: GeoffS on April 08, 2011, 07:53:41 am
Look up timing belts or pulleys and you/ll find something like this (http://www.smallparts.com.au/store/partslist/pulleystiming1000mmpitchstock/pulleys/wide/1/):

is this what you're after?
Title: Re: looking for a long gear/extruded spur gear
Post by: dequo on April 08, 2011, 08:22:57 am
yeah pretty much that but it needs to be able to mesh properly with a spur gear. the thread on that looks more rectangular
Title: Re: looking for a long gear/extruded spur gear
Post by: RayJones on April 08, 2011, 09:17:32 am
Does the word "pinion" help?
Title: Re: looking for a long gear/extruded spur gear
Post by: DaveW on April 08, 2011, 09:33:32 am
How about this,
http://www.hpcgears.com/products/toothed_bar_stock.htm (http://www.hpcgears.com/products/toothed_bar_stock.htm)

HPC are very good, had them make some custom gears for me for robot wars, was surprisingly cheap
Title: Re: looking for a long gear/extruded spur gear
Post by: mjkuwp on April 08, 2011, 12:52:33 pm
Do you need one for a one-off project, or a supply of them for production?  it makes a difference.  Also you describe the gear as "tall" but specifiy 10mm thick by 35mm DIA... which seems short and fat.  Is the difference semantics? or a typo?  I guess relative to a lot of things I see 10mm thick would be unusual but I just wanted to make sure.
Title: Re: looking for a long gear/extruded spur gear
Post by: dequo on April 11, 2011, 06:05:02 am
i think daveW wins this time, thanks mate