Never started a thread before, this should be interesting....
As I have read along over the last few years, many have commented that the set screws in QCTP tool holders are often less than optimum (too loose or too soft most often cited as issues) and should be replaced with "good ones". I have kind of kept that in the back of my mind as I leaf through hardware catalogs and such - yes, entertainment comes in many forms for the "afflicted". Without too much fuss, in general, set screws come in several flavors: dog point (or half dog point), cup point, and flat point. Socket heads and square heads are available for tightening things down. Most tool holders seem to favor the dog point style and most have allen head/hex socket drive. Which brings us to the question - if you are replacing set screws for a tool holder, which type of point and which type of drive do you prefer?
The extra threads at the end would seem to be an advantage for the flat nose, especially for tools that fill up the whole slot in the holder. In some cases you would lose almost half of the thread engagement, although you still probably have 1.5 diameters and should be good by normally accepted practice. It just looks funny. Square drive would seem to be an advantage for durability and dimensional variation over the hex socket style (which many seem to comment about). If there are space considerations, the driver or drive system (socket or wrench or ?) for a square head would be larger than an allen key, but not wildly so. Making a metric square head driver is more difficult than buying a hex key, but challenges are what we live for.
As I have read along over the last few years, many have commented that the set screws in QCTP tool holders are often less than optimum (too loose or too soft most often cited as issues) and should be replaced with "good ones". I have kind of kept that in the back of my mind as I leaf through hardware catalogs and such - yes, entertainment comes in many forms for the "afflicted". Without too much fuss, in general, set screws come in several flavors: dog point (or half dog point), cup point, and flat point. Socket heads and square heads are available for tightening things down. Most tool holders seem to favor the dog point style and most have allen head/hex socket drive. Which brings us to the question - if you are replacing set screws for a tool holder, which type of point and which type of drive do you prefer?
The extra threads at the end would seem to be an advantage for the flat nose, especially for tools that fill up the whole slot in the holder. In some cases you would lose almost half of the thread engagement, although you still probably have 1.5 diameters and should be good by normally accepted practice. It just looks funny. Square drive would seem to be an advantage for durability and dimensional variation over the hex socket style (which many seem to comment about). If there are space considerations, the driver or drive system (socket or wrench or ?) for a square head would be larger than an allen key, but not wildly so. Making a metric square head driver is more difficult than buying a hex key, but challenges are what we live for.