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Old 12-12-2008, 09:53 AM   #1
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Default Spur Gear Pitch Options

Why would you choose a 64p or 48p spur gear, assuming you had a matching pinion pitch?

What are the advantages/disadvantages of each?
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Old 12-12-2008, 10:01 AM   #2
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64 is quieter and you can fine tune your FDR better. 64 pitch is more prone to damage on dirty surfaces due to fine teeth.

48 is a little louder and limits the fine tuning of your FDR. 48 pitch is less prone to spur stripping and damage due to the larger tooth size.
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Old 12-12-2008, 10:05 AM   #3
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Originally Posted by liljohn1064 View Post
64 is quieter and you can fine tune your FDR better. 64 pitch is more prone to damage on dirty surfaces due to fine teeth.

48 is a little louder and limits the fine tuning of your FDR. 48 pitch is less prone to spur stripping and damage due to the larger tooth size.
Thats all you need to know.
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Old 12-12-2008, 10:46 AM   #4
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Awesome!

Thanks
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Old 12-12-2008, 11:25 AM   #5
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Liljohn nailed it ...setting GEAR MESH is my biggest reason for chosing over the other

The larger tooth 48p can be off a little on the mesh and NOT strip a gear.

The finer 64p gears, the mesh is crucial. Too tight, gear binding occurs, too loose, gears wear or strip really easy.

So depending on what type of vehicle I'm using, I'll run one or the other (I have a large stock of BOTH)

For instance in my TC3 Touring Cars, I run 48p, because adjusting the motor is sometimes difficult to move the motor just a small amount.

In my old HPI Pro2 TC, adjustment is easy, so I use nothing but 64p.

OVAL cars also easy, so nothing but 64p.
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Old 12-12-2008, 05:42 PM   #6
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Quote:
Originally Posted by SWTour View Post
Liljohn nailed it ...setting GEAR MESH is my biggest reason for chosing over the other

The larger tooth 48p can be off a little on the mesh and NOT strip a gear.

The finer 64p gears, the mesh is crucial. Too tight, gear binding occurs, too loose, gears wear or strip really easy.

So depending on what type of vehicle I'm using, I'll run one or the other (I have a large stock of BOTH)

For instance in my TC3 Touring Cars, I run 48p, because adjusting the motor is sometimes difficult to move the motor just a small amount.

In my old HPI Pro2 TC, adjustment is easy, so I use nothing but 64p.

OVAL cars also easy, so nothing but 64p.
For anyone who has problems meshing 64 pitch gears i have a super simple solution for you. you can do it blind folded. Lets say you need to run a 47 tooth pinion. Put on a 48 tooth put it tight to the spur and tighten the motor down. Remove the gear and put the 47 back on. You should have the perfect mesh. I have done this for years, i hve not stripped a gear since.

Or you can do the old toilet paper trick. Put a small piece of toilet paper between the spur and pinion and tighten it down. then roll it out and it should be close. However i find the larger pinion deal works best.
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