Schmidt K6 threads

Signed-In Members Don't See This Ad
H

hooked

Member
Joined
Mar 25, 2019
Messages
459
Location
Massachusetts
Can anyone confirm that the Schmidt K6 converter uses M7.5 x 0.75 threads? I have now tried two different crap taps from Amazon and eBay, but neither seems to fit. Neither is stamped, so I am guessing the taps are junk or just the wrong size. Does anyone use another, close, more readily available tap for this converter?

I can't find another besides eBay. It probably comes from the same factory as the tap I already have, which doesn't work, and won't arrive until mid-November. I do not want to get this made through TAPCO as this is for a one time customer request. Any advice would be appreciated.



1759766549828.png
 
Signed-In Members Don't See This Ad
hooked said:
Can anyone confirm that the Schmidt K6 converter uses M7.5 x 0.75 threads? I have now tried two different crap taps from Amazon and eBay, but neither seems to fit. Neither is stamped, so I am guessing the taps are junk or just the wrong size. Does anyone use another, close, more readily available tap for this converter?

I can't find another besides eBay. It probably comes from the same factory as the tap I already have, which doesn't work, and won't arrive until mid-November. I do not want to get this made through TAPCO as this is for a one time customer request. Any advice would be appreciated.



View attachment 388090
Click to expand...
Curious - why are you not simply sticking the converter into the end of the nib and use the threading for the Jowo Nib section - M7.4 x .5 on the section to hold the nib assembly? The nib assembly has an o ring press fit for the converter into it. Am I missing something?

Kevin
 
NJturner said:
Curious - why are you not simply sticking the converter into the end of the nib and use the threading for the Jowo Nib section - M7.4 x .5 on the section to hold the nib assembly? The nib assembly has an o ring press fit for the converter into it. Am I missing something?

Kevin
Click to expand...
I have someone who does not like friction-fit converters and requested a threaded K6 converter in their pen.

Fred Bruche said:
Yes, M7.5x.75 is correct. I got mine from Richard Greenwald back when.
Click to expand...
Thank you. I found another to try on Amazon. I'll give it a shot.
 
hooked said:
I have someone who does not like friction-fit converters and requested a threaded K6 converter in their pen.


Thank you. I found another to try on Amazon. I'll give it a shot.
Click to expand...
Well I learned something new today! I wasn't even aware they came threaded. I have been concerned with the converter potentially loosening if it's jostled a lot, so I've kept my drilling a bit tighter to minimize the space that the converter can bang around within the pen body. Going to have to look at threaded converters.
 
Oh. I understand your question now. The K5, which is what I typically use, is a friction fit. The K6 is threaded. My understanding is that some people believe the K6 is superior because it is less likely to come loose if dropped or handled roughly.

I have seen a few makers switch to the K6 in the last couple of years. I want to offer it as an option in the future. I will let everyone know if this latest tap I am getting from Amazon is any good once I receive it.

Amazon.com: Aceteel Metric Thread Tap M7.5 X 0.75, HSS Machine Tap Right Hand M7.5x0.75mm : Industrial & Scientific

Buy Aceteel Metric Thread Tap M7.5 X 0.75, HSS Machine Tap Right Hand M7.5x0.75mm: Thread Milling Taps - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
 
Following the thread. I also have wondered about making the section so that it will accept the K6 threaded converter.

The section tends to be the trickiest part of the pen for machining and tolerances. Just what I need is adding another degree of difficulty! 😬
 
I single point mine, so I don't really know what limit/fit of tap would work best. I do know that the thread isn't typical metric 60 degree. The root is truncated and requires a larger drill than what one would calculate for an M7.5x.75. The way I make mine is to cut the section to accept a cartridge or K5 converter and then cut the threads for the K6.
 
Yes, the 7.5 x 0.75 measurements are correct. It's usually not difficult to find this tool.
Just one note: I had to put a sticker on the k6 converter warning about the threads. Some customers were trying to remove it by pulling it without unscrewing it, saying the part was "stuck."
 
You must log in or register to reply here.
Back
Top Bottom