What tool is used to make the hex in a cap screw?

[Bob W.]

Is there a special tool for creating the internal hex in a socket head cap screw? If anyone has a link to a site that describes the process please pass it along.

 

Thanks,

Bob

[Guest]

check out

 

www.slatertool.com

 

Rotary Broach

[peter08]

Probably the easiest way to learn how its done is to watch the video too.

 

http://www.slatertools.com/video.htm

[Keith @ Solid Code Solutions]

Super Cool! What can I say, I'm easy.

[DC Gorn]

FYI SHCS are not made with a rotary broach system. Tho it is a great tool. They are cold formed on "Bolt Maker" machines. I used to design tools for a OBF-130 boltmaker that made up to a 1/2" SHCS. This machine produced 120 pc per minute less the thread and could run un-attended for shifts at a time. Its the only way to make a bolt, course they are still mostly made over seas now. Only the odd ball short runs are made here in the USA.

[Kannon]

its something our company makes millions of a week. heres a video of the process, and its not our companys website but gives you a good idea of the cold form heading process.

The second hit of the part usually contains the drive type and the finished head shape.

 

on the right side of the screen play the video after following the link.

cold form heading

[toolall1]

Rotary Broach

 

[Kannon]

yes for the question at hand I believe the correct answer would be a Rotary Broach.

Unless you want to buy all the equipment for cold heading

[DC Gorn]

I agree 100% that on this form the Rotary Broach is what he was looking for. I just wanted to chime in so some the younger people understood that is not how a SHCS they buy from MSC are made. Sorry if my post sounded rude or know-it-all.

[Don S at Barefoot CNC South]

For larger hex and square holes there is another option a Watts drill can drill sq. and hex holes. Watts drill