Gearbox finish

[jon]

Hi all,

I have a YPVS gearbox I aquired a while ago, and the teeth look to have lots of small horizontal marks. At first I thought it was wear, but it’s too uniform on each and every gear.

Starting to think this is how they looked with no wear after the machining/grinding?

I have also a worn 6th gear on an LC gearbox, and it is a completely different surface. Sort of very shiney, with the odd pit mark.

Anyone else noticed this on a very low miles gearbox? Certainly most I’ve seen don’t look like this.

Jon

[dusty350]

Got any pics Jon ?
If it helps, this is a Pv gearbox;

Hybrid rebuild pics (125) by dusty miller, on Flickr

This is a very low miles 400e gear set;

20200216_164207 by dusty miller, on Flickr

And Lc;

20160215_202911 by dusty miller, on Flickr

Hth

Dusty

[midlifecrisisrd]

The striping is normal

Worn ones are usually very shiney, discoloured or pitted just behind the mating surfaces

Steve

[Tobyjugs]

Jon if you put it under a strong magnifying glass it very easy to see the differences.

[jon]

Nov 20, 2021 18:18:05 GMT 1 midlifecrisisrd said:

The striping is normal

Worn ones are usually very shiney, discoloured or pitted just behind the mating surfaces

Steve

Thanks everyone for the responses.

As suspected I think the more the lines show the lower the wear if it’s factory machining/grinding marks.

Might use this one then in my 385.

Jon

[jon]

Nov 20, 2021 17:26:57 GMT 1 dusty350 said:

Got any pics Jon ?
If it helps, this is a Pv gearbox;

Hybrid rebuild pics (125) by dusty miller, on Flickr

This is a very low miles 400e gear set;

20200216_164207 by dusty miller, on Flickr

And Lc;

20160215_202911 by dusty miller, on Flickr

Hth

Dusty

Hi Dusty,

Yes, my YPVS gearbox looks just like the top picture.

Jon

[midlifecrisisrd]

I've got some new banshee gears, I'll have to look and see what they are like

Steve

[jon]

Nov 21, 2021 12:33:40 GMT 1 midlifecrisisrd said:

I've got some new banshee gears, I'll have to look and see what they are like

Steve

Waiting patiently Steve 😆

Jon

[Tobyjugs]

It's a long way to his garage 😅

[midlifecrisisrd]

Jul 29, 2022 10:30:03 GMT 1 Tobyjugs said:

It's a long way to his garage 😅

Currently 100 miles from it 😁

Steve

[yamman1066]

look ok to me

[geoffers997]

That’s one hoofing big backyard 🤣