Pin wear

[Driver]

What's considered enough wear in a pin to go for a new pin. I'm currently redoing a loader. I have some pins that have 1mm to 1.5mm wear. Does a lad renew these or just reuse them. Doing nothing to them.

 

[essexpete]

I would say it depends very much on the pin diameter. When I was a kid we used old industrial loading shovels that were knacked but lasted years with a bit of grease. On the other hand I have a mini digger with 25mm pins and a bit of wear allows a lots of slop and rapididly increasing pin and bush wear.

 

[Driver]

I would say it depends very much on the pin diameter. When I was a kid we used old industrial loading shovels that were knacked but last year's with a bit of grease. On the other hand I have a mini digger with 25mm pins and a bit of wear allows a lots of slop and rapididly increasing pin and bush wear.

The pins are about 50mm. Would need to double check but they are big enough pins alright.

 

[essexpete]

Other thing to consider would be a worn pin in a new bush will rapidly wear the bush.

 

[Tomr10]

How many hours you doing, had new pins bushes and some line boreaing done on a machine and tbh it properly wasn’t worth it for the hours it’s used as could hardly tell the difference and they were more than 1mm

 

[davidroberts30]

Turn old pins 180 degrees

 

[Bobthebuilder]

Turn old pins 180 degrees

That's as bad as saying a tyre is only flat at the bottom

 

[davidroberts30]

That's as bad as saying a tyre is only flat at the bottom

Shhh

 

[ollie989898]

If you're re-doing a loader and it's already in bits surely makes sense to change any parts with wear and their pins? Once you've got movement it surely accelerates wear?

Is it worth looking at a central or even automatic lubrication system for all the pivot points whilst you are at it?

 

[clbarclay]

If the pins are case hardened then the wear rate will increase rapidly once worn through the toughened outer skin.

Some pins might be through hardened so will be tough all the way through, though I expect these will be pretty rare.

I wouldn't be surprised if some machinery has non hardened pins. In which case they will have been wearing quickly from new. The advantage of these is they shouldn't have worn any holes that aren't bushed so much.



Case hardening produce a hard layer around 1.5mm thick. Chances are that wear you measured is concentrated on one side of the pin, not evenly all the way around, so if those pins are case hardened then they have had more than half of the tough skin worn off.