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Spur gear - To lube or not to lube

zderekv

Well-Known Member
Messages
118
I don’t see a need to lubricate anything made of nylon/plastic. Even lubing or greasing a steel spur will cause it to attract and hold dirt and grit. So it’s a no for me dog.
 

HeavyBag

Well-Known Member
Messages
71
I don’t see a need to lubricate anything made of nylon/plastic. Even lubing or greasing a steel spur will cause it to attract and hold dirt and grit. So it’s a no for me dog.
...and that attracted dirt will now act as an abrasive sandpaper-esque agent.
 

Jddemelfi

Well-Known Member
Messages
48
Location
North East PA
I run grease but I have a steel spur. I also seal the case to keep dirt out. I'm not convinced it does too much but it cant hurt if done right ....Lube for Life.
 

The_Man_With_The_Ruckus

Active Member
Messages
25
I did grease my steel one and it quieted it down... until about 30 seconds later when my rear diff ring exploded, snapping off the rear section of the chassis. then it didn't make any noise at all LOL
 

Lephturn

Well-Known Member
Messages
51
I just am about to replace a plastic spur gear- good timing. Given that this gear is the key part of the slipper clutch, putting grease anywhere near there seems like a bad idea.
 

weave

Well-Known Member
Messages
271
Location
San Jose, Calif
I'm a retired machinist and make some of my own parts, and yes a little gear grease is good for metal to metal gearing. If you ever have taken apart a rc tranny/differential with nylon gearing you will notice the gearing has lithium grease. I grease all my metal gearing on all my rc RC vehicles and have no collections of dirt and it will quite the meshing contact of the gearing. Metal gearing is louder then nylon gearing, that's why they use nylon, to keep the noise down. However, they won't stand up to high torque brushless motors.
 

The_Man_With_The_Ruckus

Active Member
Messages
25
Given that this gear is the key part of the slipper clutch, putting grease anywhere near there seems like a bad idea.
I put grease on the spur just on the teeth. I am careful not to get it anywhere else, and I am not having any problems. plus, the centrifugal force will want to fling the grease outwards, away from the slipper.
 

weave

Well-Known Member
Messages
271
Location
San Jose, Calif
Yes, you don't need but a dab or two. I know some hobbyist that use Vaseline and have had good lubrication with that. I myself haven't tried Vaseline. The whole reason to use a grease is to quite the noise that hard steel gearing produces, nylon gearing produces none. And you want use a high viscosity grease so it will stick to the teeth and stay, even during rotation.
 

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The_Man_With_The_Ruckus

Active Member
Messages
25
you are 110% right that you only need a dab. I used a bunch one time and it got EVERYWHERE! rookie mistake. there are still spots where it is still greasy on the case! oops...
 
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