ed4copies
Local Chapter Manager
One of my pet peeves with this "industry" is the inaccuracy of describing the brass tubes by using the diameter of the HOLE you drill for that tube.
When we say we want an 8mm tube, it is NOT 8 mm!!!!! The actual outside diameter of the "standard 8mm tube" is actually 7.7mm or .302 inches.
More importantly, the inside diameter (where you are going to put the press fit parts of your pen) is .290"
HOWEVER!!!!! Some of the 8mm circuit board tubes have an inside diameter of .2865 inches.
SO, can they be made to work? Yes, with SOME MODIFICATION!! THIS IS NOT A "PLUG AND PLAY".
Personally, I would use a chain saw file and remove some brass from the inside of the circuit board. MAY have to sand some off the insert part of the couplers from the pen kit. MAY have to use adhesive to hold everything together when I was finished.
I would charge my customer accordingly!!! YOU are the PEN maker!!!
PLEASE MEASURE ALL PARTS BEFORE ATTEMPTING ASSEMBLY!!!!!
Always remember in penmaking 8mm does NOT equal 8mm. This is also true of 10.5mm, 3/8", 12.5mm, 7mm, etc!!!
I hope this will save you some grief!!!
When we say we want an 8mm tube, it is NOT 8 mm!!!!! The actual outside diameter of the "standard 8mm tube" is actually 7.7mm or .302 inches.
More importantly, the inside diameter (where you are going to put the press fit parts of your pen) is .290"
HOWEVER!!!!! Some of the 8mm circuit board tubes have an inside diameter of .2865 inches.
SO, can they be made to work? Yes, with SOME MODIFICATION!! THIS IS NOT A "PLUG AND PLAY".
Personally, I would use a chain saw file and remove some brass from the inside of the circuit board. MAY have to sand some off the insert part of the couplers from the pen kit. MAY have to use adhesive to hold everything together when I was finished.
I would charge my customer accordingly!!! YOU are the PEN maker!!!
PLEASE MEASURE ALL PARTS BEFORE ATTEMPTING ASSEMBLY!!!!!
Always remember in penmaking 8mm does NOT equal 8mm. This is also true of 10.5mm, 3/8", 12.5mm, 7mm, etc!!!
I hope this will save you some grief!!!