M22 x 1.5mm pitch half nuts (oil cooler mounting)

[facthunter]

Get a piece of HEX offcut  OR Trailer axle nuts will most likely be Metric.  Nev

[onetrack]

Marty - Yes that Jap motorbike axle nut is M22 x 1.5. It appears it fits a wide range of Jap bikes. I didn't even think of motorbike axle locknuts yesterday.

 

https://specbolt.com/rear-axle-fuji-lock-nut-m22/

 

Edited May 30, 2023 by onetrack

[Marty_d]

Yep,  although they are 13mm thick.  I've only got 16mm total on the threads and I need 6 for the top nuts and another 1 for the bracket, leaving 9mm.  So I reckon Blueadventures is right and I should just get some scrap 6mm ally and tap it out.

[Geoff_H]

I have used two nuts locked on a thread in the lathe and  carbide tools to cut down nuts.  This system keeps the tool away from the jaws and an expensive collission. I have also made nuts using hex bar in the lathe.  Beware of cheap Chinese dies I have bought some online that don't cut a thread that will connect to a standard bolt.

 

One fastener supplier that sometimes has the odd fastener is Lee Bros of North Parramatta they are an outside chance.  But if you find that they have one I will buy it and post it to you.

[old man emu]

My go to fastener supplier for non-aviation spec stuff is www.bolt.com.au at Smeaton Grange, which is near Camden NSW

 

They list an M22 x.15 locknut for $7.80 Part No BLNMF22x1.5

 

There is a store in Dandenong. 

Store Locations

WWW.BOLT.COM.AU

---

Find your nearest local Bolts & Industrial Store.

 

[facthunter]

6 MM of Ally is nowhere near the right strength for 11MM dia.  Nev

[Geoff_H]

90% of the axial load of a bolt is taken in the first  one and a half threads. A bolt with a lower modulus of elasticity make load 90% in a slightly larger number of threads.  So lock bolt material would not worry me so much.  But the galvanic action of dissimilar metals would worry me.

[Marty_d]

The oil cooler threads are aluminum themselves,  I'm pretty sure.

[spacesailor]

Taping alloy is not good , as it binds in the tap thread's. 

BEST To get' HEX ' BAR  ,then you don't have ' galvanic problems. 

spacesailor

Oops read that last post after I hit send . Make them all alloy .

Edited May 31, 2023 by spacesailor
A little more !

[facthunter]

That's the logical thing to make them from then. Duralumin (TM) is a stronger alloy. .  Nev

[skippydiesel]

Dis I mis the obvious supply solution in my very quick read through - E mail B Flood with the following part number for an availability & price.

 

Rotax Oil Radiator parts - 4 nuts on part number 242873

 

 

2 N 242873 ..2 HEX NUT M22x1.5 (4)h (4)h (4)h (4)h (4)h (4)h (4)h

[Blueadventures]

24 minutes ago, skippydiesel said:

Dis I mis the obvious supply solution in my very quick read through - E mail B Flood with the following part number for an availability & price.

 

Rotax Oil Radiator parts - 4 nuts on part number 242873

 

 

2 N 242873 ..2 HEX NUT M22x1.5 (4)h (4)h (4)h (4)h (4)h (4)h (4)h

He did source some.  I was actually sorting stuff at the hangar today and unwrapped some bubble wrap and it contained a set of oil cooler connections (items in image except the 1 & 5 parts).  Were from an oil cooler we needed 8 months ago.

[Blueadventures]

Marty if your ones don't fit or something let me know.

[Marty_d]

44 minutes ago, Blueadventures said:

Marty if your ones don't fit or something let me know.

Thanks Mike, will do. They're coming from China so I'm not expecting them for a while.