[TR] Thread of Stromberg 175 Needle valve

Michael Marr mmarr at albiontechnical.com
Sun Oct 25 12:12:22 MDT 2020


Good!  Glad that worked out. 

Mike

Sent from my iPhone

> On Oct 25, 2020, at 12:01, Roger Elliott <elliottr at rmi.net> wrote:
> 
> Thanks Greg and Mike,
> I bought a set of M11 1.5 taps (taper, plug and bottom).   They worked perfectly for the needle valve.  I am glad I got the set. I started with the taper, but used the bottom tap to finish up.
> 
> So, M11 1.5 is the ticket.
> 
> Thanks again guys.
> 
> Roger
> 
>> On 10/21/2020 8:19 PM, Michael Marr wrote:
>> 10.8 mm is within the tolerance for the major diameter of an M11 thread (Max-10.968 mm, Min-10.732 mm), so that may well be what you have.
>> 
>> Mike
>> 
>> Michael J Marr, P.E., CEng.
>> Albion Technical Services
>> W5918 Hackbarth Rd
>> Fort Atkinson, WI 53538
>> 
>> Cell:  630-202-0065
>> Email:  mmarr at albiontechnical.com
>> 
>> -----Original Message-----
>> From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Greg Gelhar
>> Sent: Wednesday, October 21, 2020 7:48 PM
>> To: 'Roger Elliott' <elliottr at rmi.net>; triumphs at autox.team.net
>> Subject: Re: [TR] Thread of Stromberg 175 Needle valve
>> 
>> A machine job shop with thread milling capabilities could do the work. No idea what they would charge. I don't have access to a thread micrometer, so that thread might even be M11 x 1.5 at least that size is on some charts.
>> 
>> -----Original Message-----
>> From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Roger Elliott
>> Sent: Wednesday, October 21, 2020 3:03 PM
>> To: triumphs at autox.team.net
>> Subject: Re: [TR] Thread of Stromberg 175 Needle valve
>> 
>> Thanks Greg,
>> 
>> Sounds like finding a tap for that is out of the question.
>> 
>> I know I read a post somewhere about someone changing the inlet side for a triple carb set-up, but I have not been able to find it again.
>> 
>> Roger
>> 
>>> On 10/20/2020 3:52 PM, Greg Gelhar wrote:
>>> This could be one of those times where a manufacturer uses a
>>> proprietary
>> thread size. I measure that thread to be    M10.8 x 1.5    an odd ball for
>> sure.
>>> Greg G,
>>> Osseo, MN
>>> 
>>> -----Original Message-----
>>> From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Roger
>>> Elliott
>>> Sent: Tuesday, October 20, 2020 2:05 PM
>>> To: triumphs at autox.team.net
>>> Subject: [TR] Thread of Stromberg 175 Needle valve
>>> 
>>> Hi,
>>> I would like to change the side that the fuel inlet comes in on a
>> Stromberg 175 CD-2.  It looks like it will be real easy to do, but the threads on the needle valve don't seem to match anything in my tap set.
>>> Does anybody know what the thread is on the needle valves?
>>> 
>>> I know I could get a different carb body, but I am trying to avoid that.
>>> 
>>> Thanks,
>>> Roger Elliott
>>> 
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