Anyone shed light on this?

The reamer is adjustable, it badly needs a clean to see the slots, at one time I had a few from a very old style 1940's car repair shop.

Reamer don't look adjustable to me but does look like the non tang end has a guide bush fitted. Helps reamer to run true if you bother to drill a "Ream" sized hole before hand.

Regards Ian

Me thinks it is?

I can see the thin saw cuts and the flats of the adjusting screw.
The adjustment is small, just enough to set the clearance required for a particular size.

Found a very similar one here.

**LINK**

Thank you everyone.

After all the help, I have googled the points given. It is a 4 flute 1/2" tap remover. The small block with roller is indeed for a Capitan lathe. If this of use to anyone, please let me know. It is of no use to me and don't really want to rid of it. I still trying to find information on the reamer. I have a feeling that the knurling tool maybe for the turret on a Capstan lathe. I also have 2 tool holders for it hence my assumption. Thank you for all your help. I am still looking through the rest so there may be more to follow.

My apoogies, I did not see page 2 and the responses on the reamer. I will clean it up. I think it has been in a box for some years as the back of a shed. Most things do need a good clean but from what I can see most of it is made in the UK or USA. When I have cleaned it, I will post some updates.

I have a 1/2" inch reamer by Toga. On the MSC site they are described as expanding reamers.

Brian

Has a young boy many moons i worked for company called RCA cutting tools in bury and the company made that type reamer on special order i could not see the saw cuts as special they made from drawings so you would not know what their purpose regards norm

For the expanding reamer, the range of relief is quite small maybe just a few thou. Lads used to jack them out and snap off one of the lands and put it back without telling anyone and then deny all knowledge of doing it. I have them down to less than 3 mm. They are in fact, 'Belled' and need extreme care in use.

It is some sort of expanding reamer. Thank you everyone. Apart from the obvious answer, I assume this may have been off a special requirment for this? Anyone with ideas? The only thing I can think of is maybe a rubber bush housing on some form or car/brshed arm?

Going back to the Sintox block it is used in ballistic armour plates in body armour .

We used expanding reamers like that on printing machines when using undersized bushes. If I remember rightly our reamers were about 10 thou under nominal size. ( I'm going back a good twenty five years )

Roy

That type of expanding reamer was commonly used for reaming valve guides, so had only a limited range of adjustment from slightly below to slightly above the nominal size. I think maybe they were cheaper and easier to use for the average motor mechanic than a fully adjustable reamer. Big diesel engines used quite large ones. Often they were used to just ease the bore of the valve guide after it had been pressed or shrunk into the head and closed up a tad in the process.

Thank you all,

Armour or high voltage insulation is what I am going for, as for the persons job/history I am still not there. I have one last item which looks to be an aluminium roller with airlx stamped on it and c8 in a dimond shape. Did a Google search with no avail. Any ideas on the stamp marks?

Referring to my Model Engineer article - Issue No 4557 Page 529, I found that an adjustable reamer was ideal for a final skimming of the acrylic valve bore. Kept sharp with the occasional rub with an Arkansas stone, cutting was smooth and virtually effortless.

Article extract

I was still concerned about the stress-cracking situation caused by overheating the surface of the bore. Figuring that reaming the valve body in the lathe even at slow speed was not a good idea my next step was to individually hand-ream the bore of each one. That way I could get some `feel’ (literally) for the cutting action. With the valve body held between my fingers, see Photo 8, the reamer automatically lined up with the bore. To achieve an appropriate size before final lapping and polishing, I chose to use an adjustable reamer.

Quite by chance I found one this morning. This is a small one