Torx screw star geometry 3

[Sjoerd]

I have been searching the internet for the geometry of a Torx screw. I need the exact shape of the hexagon shape. First of all I need the T30 shape. I found some links on this site, but they don't work anymore...

http://www.textronfasteningsystems.com/products/torxplus/tp_eng_tools.html

Can anyone help me on this one? Maybe someone has a dxf file?

Thanks!

 

[CoryPad]

Textron Fastening Systems became Acument Global Technologies. Their standards are located here:

http://www.acument.com/licensing/torx_ds_standards.asp

There is an ISO standard (ISO 10664) for the hexalobular drive system:

http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=40257

 

[Sjoerd]

Thanks. This brings me one step further, but I could not find any drawings of the 'star' shape definition.

 

[TVP]

The star is based on an outer circle A (across points) and an inner circle B (across valleys), and two radii for the points (internal and external). ISO 10644 gives the following definitions:

B ? 0,72 A
re ? 0,1 A
ri ? 0,175 A

A = 5.6 mm and B = 4.05 mm for T30. You need to purchase ISO 10644 if you want tolerances, gage dimensions, etc.

 

[Screwman]

The ISO dimensions are an approximation issued for gaging purposes, since the actual Torx shape is trademarked. The manufacturing dimensions are only available to Torx licensees. Try this link to contact that proper person:

http://www.acument.com/licensing/index.asp