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Old 05-13-2018, 08:46 PM   #1 (permalink)
 
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Default Has anyone modified a Virage BP Kit ?

I want to try some mods to the Virage ballpoint kit.

Just wondering if anyone has already attempted this and what results you obtained if you don't mind sharing.

Specifically, I want to reduce the brass tube diameter for the reason that the existing diameter of 27/64" does not leave much "meat" on the blank. Consequently you are hard pressed to do any creative turning with your blank.

The existing twist mechanism has an OD of about 7.3 mm
Allowing for a tube wall thickness of 0.15 mm (cutting it pretty fine, I know), one should be able to make the brass tube 7.65 mm or so in diameter. This diameter is actually extremely close to the so-called "8 mm" tube actual OD. . Some tiny adjustment may be necessary.

The blank wall thickness would then be (at its thinnest points, the ends), ( 0.474" - 7.65 mm ) / 2 = ( 0.474" - 0.301" ) / 2 = 0.086".

Compare this to the as-manufactured value of ( 0.474" - 0.406" ) / 2 = 0.034" and you see that you can realize a 0.086" - 0.034" = 0.052" increase in the blank wall thickness. . That is a significant increase.

Of course, the transmission fit inside the brass tube has to be considered, as would the hardware connection pieces that hold the tube to the plated nose cone and top finial.

I think it could be done with some careful machining from scratch of these connection pieces.

The architecture of the Virage nose cone and top finial would comfortably allow these mods. The success would rest with skillful machinist skills in making the required parts. . Brass would probably be the material of choice.

Has anyone attempted these mods ?
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Last edited by magpens; 05-13-2018 at 08:48 PM.
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Old 05-14-2018, 09:12 PM   #2 (permalink)
 
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Ya struck out Mal ! You will just need to try it yourself. But sounds interesting and fun.
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Old 05-15-2018, 07:15 AM   #3 (permalink)
 
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Mal,

I was wondering if an 8mm tube would slide over the transmission, but it might be a bit too small based on your measurement of 7.3mm. Thought it might be easier to get the smallest tube that fits over the transmission rather than making your own tube.
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Old 05-15-2018, 08:59 AM   #4 (permalink)
 
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Lewis,
Actually, an 8 mm tube is OK. . I am working with it now. . Will let you know
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Old 05-15-2018, 07:02 PM   #5 (permalink)
 
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Mark,

It seems that this is a great opportunity to do something original ....

.... making good progress !

Stay tuned !

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Originally Posted by mark james View Post
Ya struck out Mal ! You will just need to try it yourself. But sounds interesting and fun.
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