This is something that has intrigued me for a while, as I'm sure I used them 
at college for measuring engine cylinder bores, but have never came across 
them since and I'm beginning to question my memory.

They were a micrometer like a Telescopic gauge, but with a micrometer head 
being at the end of the handle instead of the a locking device. You stuck 
them down the bore, spun the head, read the reading, and repeated without 
having to remove it from the bore.

I've tried numerous google searches, but despite several attempts, have 
always drawn a blank.

Do such things really exist, and what are there proper name?
Or am I just starting to lose the plot?

moray

> Do such things really exist, and what are there proper name?

Yes they exist! I would call them bore micrometers or Bowers micrometers as 
thats the ones we use at work.

> Or am I just starting to lose the plot?

No you are not losing the plot! The modern day equivalent are these 
http://www.bowers.co.uk/docs/bowersexport.htm all digitised and capable of 
data collection. They also come in analogue. I have also at work some Moore 
and Wright bore gauges which are very old and don't appear in the latest 
catlogue http://www.moore-and-wright.co.uk/main/contentspage.htm and sound 
exactly as your description. I also have some telescopic bore comparitors 
which don't have the micrometer attachment, you use them in conjunction with 
an ordinary outside micrometer or height stand. Basically they are T shaped 
and the top of the T is spring loaded and is locked in place by using the 
long bit of the T. I will take some photos tomorrow if you are interested?

Hope that helps
Andy

Have you done a search on UK or US E-Bay using "dial bore gauge" and
search in 'business and industrial', lots of 'em are available.


-- 
Radish1us
------------------------------------------------------------------------
Radish1us's Profile: http://www.rcgroups.com/forums/member.php?u=224005
View this thread: http://www.rcgroups.com/forums/showthread.php?t=910799

"AndyN"  wrote in message 
news:g8cqbn$2pa$1@news.datemas.de...
>> Do such things really exist, and what are there proper name?
>
> Yes they exist! I would call them bore micrometers or Bowers micrometers 
> as thats the ones we use at work.
>
>> Or am I just starting to lose the plot?
>
> No you are not losing the plot! The modern day equivalent are these 
> http://www.bowers.co.uk/docs/bowersexport.htm all digitised and capable of 
> data collection. They also come in analogue. I have also at work some 
> Moore and Wright bore gauges which are very old and don't appear in the 
> latest catlogue http://www.moore-and-wright.co.uk/main/contentspage.htm 
> and sound exactly as your description. I also have some telescopic bore 
> comparitors which don't have the micrometer attachment, you use them in 
> conjunction with an ordinary outside micrometer or height stand. Basically 
> they are T shaped and the top of the T is spring loaded and is locked in 
> place by using the long bit of the T. I will take some photos tomorrow if 
> you are interested?
>
> Hope that helps
> Andy

Thanks for that.
Going by the various catalogues and links I've looked at, I'm guessing the 
offical name will be something like 2 point bore micrometers. I'm also 
guessing that they're pretty rare items, as all the searches (google + ebay) 
I've tried have so far only come up with 3 point bore micrometers/gauges, or 
standard internal micrometers.

I'm pretty sure the set we got to use at college were Mitutoyo, but I can't 
find anything on their site.

Thanks
moray

"moray"  wrote in message 
news:g8eqkq$qm0$1$8300dec7@news.demon.co.uk...
>
> "AndyN"  wrote in message 
> news:g8cqbn$2pa$1@news.datemas.de...
>>> Do such things really exist, and what are there proper name?
>>
>> Yes they exist! I would call them bore micrometers or Bowers micrometers 
>> as thats the ones we use at work.
>>
>>> Or am I just starting to lose the plot?
>>
>> No you are not losing the plot! The modern day equivalent are these 
>> http://www.bowers.co.uk/docs/bowersexport.htm all digitised and capable 
>> of data collection. They also come in analogue. I have also at work some 
>> Moore and Wright bore gauges which are very old and don't appear in the 
>> latest catlogue http://www.moore-and-wright.co.uk/main/contentspage.htm 
>> and sound exactly as your description. I also have some telescopic bore 
>> comparitors which don't have the micrometer attachment, you use them in 
>> conjunction with an ordinary outside micrometer or height stand. 
>> Basically they are T shaped and the top of the T is spring loaded and is 
>> locked in place by using the long bit of the T. I will take some photos 
>> tomorrow if you are interested?
>>
>> Hope that helps
>> Andy
>
> Thanks for that.
> Going by the various catalogues and links I've looked at, I'm guessing the 
> offical name will be something like 2 point bore micrometers. I'm also 
> guessing that they're pretty rare items, as all the searches (google + 
> ebay) I've tried have so far only come up with 3 point bore 
> micrometers/gauges, or standard internal micrometers.
>
> I'm pretty sure the set we got to use at college were Mitutoyo, but I 
> can't find anything on their site.
>
> Thanks
> moray

The Moore and Wright micrometers are not micrometers after all, they have a 
ratchet on the end of the spindle but no scale. They have a ball contact 
rather than a pad or blade but are definitely 2 point contact.

The telescopic bore gauges are called that on the wallet they are in and 
were made by Oldak. I've not done any searching for those as I've been way 
too busy at work today.

Andy

On Aug 18, 9:24 pm, "moray"  wrote:
> This is something that has intrigued me for a while, as I'm sure I used them
> at college for measuring engine cylinder bores, but have never came across
> them since and I'm beginning to question my memory.
>
> They were a micrometer like a Telescopic gauge, but with a micrometer head
> being at the end of the handle instead of the a locking device. You stuck
> them down the bore, spun the head, read the reading, and repeated without
> having to remove it from the bore.
>
> I've tried numerous google searches, but despite several attempts, have
> always drawn a blank.
>
> Do such things really exist, and what are there proper name?
> Or am I just starting to lose the plot?
>
> moray

Hi I also have a set of M&W internals, they are OK for bores over
about 1 1/4". you can get quite a long way down the bore as they come
with a tee bar to fit on the side, however I mostly use telescopics
and outside mics.
Peter

moray wrote:

> I've tried numerous google searches, but despite several attempts, have 
> always drawn a blank.

search for bore gauges on ebay.   A few on there if something like item 
#260276658842 is what you mean.


Wayne...