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Press fit dowel pin

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Rcdizy

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#1
If i drill and ream a hole .0005 undersize for a 3/16 dowel pin, and want it permanent....

If i drop a drop of loctite in the blind hole, will it stop the pin from going all the way in by hydraulic lock?
 

T Bredehoft

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#2
Yes

Put the Loctite on the pin, just before you insert it.
 

RJSakowski

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#3
A small scratch on the side of the hole can be sufficient to prevent hydraulic lock. Dowel pins are also made with a groove for the same reason. https://www.mcmaster.com/dowel-pins
 

MrWhoopee

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#4
Dowel pins are sized to be a press fit in an on size hole.
 

Cooter Brown

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#5
Heat up the .0005" undersized hole with a torch to about 200 degree F and drop the pin in, it will never come out....
 

pacifica

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#6
Heat up the .0005" undersized hole with a torch to about 200 degree F and drop the pin in, it will never come out....
Agree. Loctite bearing mount 680 has failed on me, but not a heated press fit.
 

P. Waller

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#7
If you made it a "press fit" why would you use a retaining compound at all?
Drill the hole, ream the hole and install the pin with a press, you will then find it difficult to remove if this should be required if it is not a through hole.
 
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