Re: Pull stud geometry for Brother TC-215
hi mukanico, careful with footprint on the pullstud
there may be a problem ( sooner or later ), if contact point is almost near the edge ( and almost no footprint towards the center ) *1
is better if contact point is also near the edge ( thus also towards center )
and is even better if contact point is more pronounced towards the center
if you wish to have no worries :
... periodically check the clamping force by using a drawbar force gage, retention force measurement, etc, and compare it with the factory spec
... periodically change the pullstuds, at least for the holders that do the rough work
... craft your own pullstuds from forged metal; in such a case, you may experiment with that taper, so to obtain a stronger pullstud with better footprint
far as i have heared, pullstud failures are more frequent on bt30, then bt40, and last bt50 / kindly
*1 if you use that pulstud on another holder, the new footprint may be at a different angle, and, in time, it may damage the pulstud; also, if you don't use it on another holder, but keep using it on same holder, then atleast periodically inspect the footprint progres
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