P38A Eas pump

oakey · Nov 19, 2018

Snapped my allen key inside the allen screw that holds the piston on shaft.
Anyone know a good way of getting it out so I can put a real allen key on it?

Nickpen · Nov 19, 2018

depends, can you see any of the snapped off key at all? if its buried inside the bob weight then by the time you've faffed on you'll just end up buying a whole new pump!

brianp38dse · Nov 19, 2018

Can you use a small punch and punch the broken bit back the other way to free it, then pick it out.

oakey · Nov 19, 2018

I can see the shiny broken bit in the bob weight but cant reach it

wammers · Nov 20, 2018

oakey said:
I can see the shiny broken bit in the bob weight but cant reach it

I have never ever in all my days seen an Allen key snap. Bend twist or round off maybe but never snap. The one you used must have been over hardened. What size did you use?

tomcat59alan · Nov 20, 2018

wammers said:
I have never ever in all my days seen an Allen key snap. Bend twist or round off maybe but never snap. The one you used must have been over hardened. What size did you use?

Chinese monkey metal??

wammers · Nov 20, 2018

tomcat59alan said:
Chinese monkey metal??

Sounds like it Alan.

Grrrrrr · Nov 20, 2018

brianp38dse said:
Can you use a small punch and punch the broken bit back the other way to free it, then pick it out.

Only other option is drill it. Taking the end off should allow you to stop it moving.

Datatek · Nov 20, 2018

Grrrrrr said:
Only other option is drill it. Taking the end off should allow you to stop it moving.

Need a special drill if the Allen key is glass hard.

Grrrrrr · Nov 20, 2018

Datatek said:
Need a special drill if the Allen key is glass hard.

Cannot think of any other option. Tungsten ones are cheap enough on the bay but nitride coated with a little oil to lube it should be OK.

Wazzajnr · Nov 20, 2018

wammers said:
I have never ever in all my days seen an Allen key snap. Bend twist or round off maybe but never snap. The one you used must have been over hardened. What size did you use?

Ball ended ones can snap as there is a weak spot. Nornally needs a fair bit of force though.

oakey · Nov 20, 2018

Was an 1/8 part and had the wee thin bit at the bottom. Was originally intended for circuit boards I think.
I did use a fair bit of force tho but only by hand

P38A Eas pump

oakey

Well-Known Member

Nickpen

Active Member

brianp38dse

Well-Known Member

oakey

Well-Known Member

wammers

No longer with us, RIP

tomcat59alan

Well-Known Member

wammers

No longer with us, RIP

Grrrrrr

Technician, Bodgit & Scarper Ltd

Datatek

Well-Known Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

Wazzajnr

Well-Known Member

oakey

Well-Known Member

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