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IMPERIAL SPANNER NEEDED

Posted: Thu Dec 23, 2021 4:06pm
20 replies599 views7 members subscribed
Classic man

Classic man

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The classic man is stuck for a spanner for his classic Jeep.  I have had a half shaft seal go so the brake is now oil soaked.  I need to extract the half shaft to replace the seal which means (on this Jeep) dismantling the diff. and to do that I have to remove an unusual bolt for which I don't have a spanner in Spain.  It's a 12 pointed head that needs a 1/4inch ring spanner.  Nothing else will fit.  Why they couldn't use a socket head screw I don't know.

If anyone out there in Blancaland has a 1/4 inch ring spanner I can beg, borrow, steal or buy please let me know.  It needs have a hole in the end about 1/4" in diameter and be bi-hexagon.  Single hexagon will not fit.  Condition is not too important.

Hopefully someone may have brought some imperial spanners over.

Thanks for looking.  Happy Christmas to all frustrated mechanics out there.

Darro

Posted: Thu Dec 23, 2021 9:33pm

Darro

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Posted: Thu Dec 23, 2021 9:33pm

I've a fair collection of imperial spanners and sockets but nowt which will fit that.

By the looks of it it's been 'persuaded' out a few times in the past so I wonder if a metric socket might similarly be 'persuaded' on?

A replacement stock bolt should be simple enough to source or even a cap screw.

Can't think why they would they use a 12 point there in the first place, it's only a locking bolt for the pin, Salisbury axles use an easily driven in/out roll pin.

Classic man

Posted: Fri Dec 24, 2021 10:29am

Classic man

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Posted: Fri Dec 24, 2021 10:29am

Darro wrote on Thu Dec 23, 2021 9:33pm:

I've a fair collection of imperial spanners and sockets but nowt which will fit that.

By the looks of it it's been 'persuaded' out a few times in the past so I wonder if a metric socket might similarly be 'persuaded' on?

A replacement stock bolt should be simple enough to source or even a cap screw.

Can't think why they would they use a 12 point there in the first place, it's only a locking bolt for the pin, Salisbury axles use an easily driven in/out roll pin.

Hi Darro ,

Tthanks for the reply. The 12 point screw is original fitment as I had to do the same job on my other Jeep in the UK a couple of years ago. On that occasion I borrowed a ring spanner from my friend next door who was into vintage motorbikes so he had a number of small imperial spanners.

A 6mm spanner it too small and a 7mm spanner is too big.  I daren't use something that is not a good fit in case it strips the points off.  As a rough guide if you are looking, the hole in the end of the spanner should be virtually the same as a hexagonal wooden pencil. I have some that measure 0.27"- 0.29" and 1/4 inch is 0.25". It's quite a small hole.

It's useful to note that imperial spanners are sized by the diameter of the bolt and metric, UNF  and UNC the size of the head hence the A/F (across flats) .

I asked myself the same question about using an Allen screw.  The only thing I can come up with is that is might be something to do with torque and/or clamping pressure.  Your suggestion re the Salisbury axle brought back a few memories as well.

The big difference between the Salisbury and Jeep axles is that the Salisbury has taper rollers at the end of the axle tube but the Jeep just a roller bearing, so the side thrust on the Jeep is taken on the centre pin not the outboard bearing.  It's a Dana 35 axle.

Thanks for the suggestions so far, keep them coming.  Happy Christmas all.

Relyat

Posted: Fri Dec 24, 2021 12:47pm

Relyat

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Posted: Fri Dec 24, 2021 12:47pm

Nope, just had a good rummage and nothing like it. 

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igup

Posted: Fri Dec 24, 2021 1:54pm

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Posted: Fri Dec 24, 2021 1:54pm

Sure none of these are what you are after but just in case.....

Classic man

Posted: Fri Dec 24, 2021 2:43pm

Classic man

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Posted: Fri Dec 24, 2021 2:43pm

Igup, was there supposed to be a picture attached of your selection?  If you have a ring spanner with a hole the size of a hexagonal pencil it could do the job.  Thanks

igup

Posted: Fri Dec 24, 2021 3:31pm

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Posted: Fri Dec 24, 2021 3:31pm

Classic man wrote on Fri Dec 24, 2021 2:43pm:

Igup, was there supposed to be a picture attached of your selection?  If you have a ring spanner with a hole the size of a hexagonal pencil it could do the job.  Thanks

Yes should have been a photo but not a ring spanner (I do not think). 

Classic man

Posted: Fri Dec 24, 2021 4:07pm

Classic man

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Posted: Fri Dec 24, 2021 4:07pm

Hi igup, thanks for the reply,  unfortunately I don't think any of those would fit.  Apart from the small size of the head on the bolt access to get anything in is very difficult.  Happy Christmas and thanks again.  Mike

igup

Posted: Fri Dec 24, 2021 4:18pm

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Posted: Fri Dec 24, 2021 4:18pm

Classic man wrote on Fri Dec 24, 2021 4:07pm:

Hi igup, thanks for the reply,  unfortunately I don't think any of those would fit.  Apart from the small size of the head on the bolt access to get anything in is very difficult.  Happy Christmas and thanks again.  Mike

Thought not but. 

Hope you get it sorted. 

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