[TR] Thread of Stromberg 175 Needle valve

[Roger Elliott]

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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