Anyone know the thread size of Kubota grease fittings?

[ruffdog]

M 6.0 x 1.0

The nice thing is this is smaller than the standard 1/4-28 zerk thread, so, a little drilling and tapping....your all set.

 

[sixdogs]

The nice thing is this is smaller than the standard 1/4-28 zerk thread, so, a little drilling and tapping....your all set.

Would I get metal pieces down in the hole?

 

[sixdogs]

M 6.0 x 1.0

I'll try it. I've got lots of fittings and none fit. Must not have one of those.

 

[ruffdog]

Would I get metal pieces down in the hole?

You may, but there are ways to limit that problem like using grease on the drill and tap to catch chips. I use spiral fluted taps that bring the chips back to the surface vs driving them to the bottom of the hole.

 

[jmc]

The nice thing is this is smaller than the standard 1/4-28 zerk thread, so, a little drilling and tapping....your all set.

The (new) 1/4-28 thread's drill diameter is .213.

The (original) 6mm nominal major diameter is .233.

So you will still have part of the old thread in your drilled out hole. And then you need to follow that old thread with a different pitched thread, if you can get them started together...

I might try that trick on some angle iron but not on a tractor housing.

 

[sixdogs]

The (new) 1/4-28 thread's drill diameter is .213.

The (original) 6mm nominal major diameter is .233.

So you will still have part of the old thread in your drilled out hole. And then you need to follow that old thread with a different pitched thread, if you can get them started together...

I might try that trick on some angle iron but not on a tractor housing.

Considering my luck, I'm going to stick the correct metric fittings.

 

[YLee Kioti]

Could the threads be British??
BSP GREASE FITTINGS | BSF GREASE FITTINGS | BSPP GREASE FITTINGS

 

[sixdogs]

Could the threads be British??
BSP GREASE FITTINGS | BSF GREASE FITTINGS | BSPP GREASE FITTINGS

I'll take a good fitting out in a day or so and try to figure it. Stay tuned.

 

[Blondie70]

Yep...do believe they are British.

 

[number two]

The Fred is correct.
The smaller ones are M6 X 1.0.
Any larger tapered pipe thread fittings should be 1/8 BSP,very close to 1/8 NPT.
Good Luck!