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Big Beech

Upgraded Alaskan clamp

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So I've had delivery of my new updated brackets so I can utilise the newer improved quick release clamps.

However having installed them and tightened things down I've come up to a dead end. 

Who on earth designed the Allen bolt sizing that clamp on to the support rails?

Not one of my keys fit, 4mm is like a prick in a shirt sleeve and 5mm is like an elephants in a mouse's ear !!!

I've a job on tomorrow milling and no way of tightening these bolts which will most likely shake themselves to oblivion 🙄

Any suggestions most welcome if you know the exact size or whatever I may need.

 

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2 minutes ago, Big Beech said:

So I've had delivery of my new updated brackets so I can utilise the newer improved quick release clamps.

However having installed them and tightened things down I've come up to a dead end. 

Who on earth designed the Allen bolt sizing that clamp on to the support rails?

Not one of my keys fit, 4mm is like a prick in a shirt sleeve and 5mm is like an elephants in a mouse's ear !!!

I've a job on tomorrow milling and no way of tightening these bolts which will most likely shake themselves to oblivion 🙄

Any suggestions most welcome if you know the exact size or whatever I may need.

 

Imperial? 5/32" maybe? Could be 3/16" but if its big for 5mm Id say 5/32". 

Edited by trigger_andy

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No idea, and I don't have any of those available nor do any friends.
How ridiculous


It might not be though.

A trick to try is seeing if a Torx head fits. It should give you enough purchase till you get some imperial keys.
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Imperial allen keys are easy enough to get .

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Hi, they are imperial unified threads and wrench sizes, It's because it's American and they've not gone metric, you're probably using a 13mm AF spanner as well which fits but not as well as a 1/2" AF, easy to find, cheers.

 

Yep, just checked my new brackets which I'll be fitting tonight ... 1/4" unc Allen bolt, 3/16" af Allen key 👍

Edited by Macpherson
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38 minutes ago, trigger_andy said:

 


It might not be though.

A trick to try is seeing if a Torx head fits. It should give you enough purchase till you get some imperial keys.

 

#27 fits but nowhere near toght enough, already tried that.

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25 minutes ago, Stubby said:

Imperial allen keys are easy enough to get .

Not this time of the evening they aren't.

I've had to make numerous phone calls to a local engineering firm who are meeting me onsite at the milling job with a selection of new bolts 5mm bolts with proper uk head sizes.

Absolutely ballache

Edited by Big Beech

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1 minute ago, Big Beech said:

Not this time of the evening they aren't.

I've had to make numerous phone calls to a local engineering firm who are meeting me onsite at the milling job with a selection of new bolts 5mm bolts with proper uk head sizes.

Absolutely ballache

5mm bolts wont be any good if they are an imperial thread though ...

Edited by Stubby
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