Self Threading Screws Db01 Etc

[mike_o]

I have noted both on the forum and IRL that the DB01 and other chassis will put the normal screws to the test. Then I found some 3mm tribular thread forming screws in a corner of my stock, and they work really well, I think.

I don't know about availabilty elsewhere, but previously, they were hard to find here in Denmark, but the internet have changed that quite a bit. So I suggest anybody with too little patience to make proper 3mm thread to take a look at these. They may not be available in black, but once you've put the tribular screw in, a reasonable thread is left in the plastic for a normal 3mm screw to fit.

cheers

[sosidge]

Not quite sure what you mean by a tribular thread forming screw... it sounds like you are describing the job of a 3mm tap, which is what I would use if I wanted to put a thread in a plastic part, although normally you can get a machine screw in the holes anyway.

Personally I don't have any real problems with the Tamiya self-tapping screws. The key is a good screwdriver - JIS pattern is different to the worldwide Phillips pattern, so invest in a Tamiya tool or one of the better quality racing ones.

[DooBeDooBeDo]

Trilobular thread forming screws, basically act like a tap but don't remove any material like a tap would. They're designed for soft materials like plastic and aluminium.

[Origineelreclamebord]

Trilobular thread forming screws, basically act like a tap but don't remove any material like a tap would. They're designed for soft materials like plastic and aluminium.

Instead of using the fluteless M3 tap that Tamiya sells then, I assume?

[Percymon]

When rebuilding my fighter buggy with new front suspension upright onto new chassis i had one heck of a time trying to get the default Tamiya screws in, probably for this very reason!

Never had issues with other rebuilds so some plastics must be tougher or have undersized holes (hence the tamiya tap )

[Origineelreclamebord]

When rebuilding my fighter buggy with new front suspension upright onto new chassis i had one heck of a time trying to get the default Tamiya screws in, probably for this very reason!

Never had issues with other rebuilds so some plastics must be tougher or have undersized holes (hence the tamiya tap )

The tap is not meant for self-tapping screws (like on the Fighter Buggy), but for a finer thread and a flat end of the screw (whereas the selftapping screws have a large thread with bigger spacing between the thickened part of the thread), the same thread is also used for metal parts (that's where to the 0.5mm refers).

Problems with tight fiting screws can indeed be hard(er) plastics and tighter holes, but also the wrong screw driver for the heads (although this is more noticeable in the lack of grip on the screw), or tapping in the screw slightly out of alignment with the hole, creating much higher amounts of friction and stresses in the part.