Deformation of Allen Head Screws: Impact or Wear?

In summary, the conversation discusses the potential for the hole of an Allen head screw to become round or circular after repeated use of an Allen key. The speakers suggest that this is a form of wear, likely caused by abrasive or impact wear. They also mention that using the proper wrench size is important to prevent rounding, but that it can still happen due to over-tightening. It is also noted that using an impact wrench with Allen head bolts can cause damage to the head.
  • #1
drag88
1
0
Hi all just a simple question about the hole of the Allen head screw becoming round/circular after repeated use of a Allen key on it. From what I read so far it should be a form of wear. I am thinking of abrasive or impact wear, but not sure which is it. Can anyone answer this? Thanks.
 
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  • #2
no way would hardened spec allen bolt round out IF you use the proper wrench..i have rounded allens i found on the original race car simply because it was not known if the bolt was inch or metric..ifin you got a metric allen and use an INCH wrench, you can round them..especially if they are rusted
 
  • #3
I've seen many Allen set screws get rounded when using the proper key. They have been over torqued and the metal has deformed, not worn. I suspect that the deformation is happening to both the key and the screw's recess. I've not seen it happen in larger size Allen headed cap screws (say 1/4 in. and larger bolt size).

I don't have any experience (or at least much) with use of an impact wrench with Allen head bolts. I can imagine that an impact wrench could readily do damage to the head.
 

FAQ: Deformation of Allen Head Screws: Impact or Wear?

Why does a hex screw hole become round?

A hex screw hole can become round due to wear and tear from frequent use, incorrect installation or overtightening of the screw.

How can I prevent a hex screw hole from becoming round?

To prevent a hex screw hole from becoming round, make sure to use the correct size and type of screwdriver, avoid overtightening the screw, and periodically check and replace worn out screws.

Can a hex screw hole be repaired?

Yes, a hex screw hole can be repaired by using a screw extractor tool to remove the damaged screw, filling the hole with wood filler or epoxy, and then re-drilling a new hole for the screw.

Are there any other alternatives to repairing a round hex screw hole?

Other alternatives to repairing a round hex screw hole include using a larger screw, using a screw anchor, or installing a thread insert to reinforce the damaged hole.

How can I prevent a round hex screw hole from happening in the first place?

To prevent a round hex screw hole from happening, it is important to use the correct tools and techniques for screw installation, avoid overtightening, and regularly check and maintain screws and fittings to ensure they are in good condition.

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