From distant memory, dual reamers were sometimes used on car suspension setups. For example, an Austin Healey had a front wishbone that used a double reamer BUT I have never seen an adjustable one – maybe a cheaper alternative to muliple reamers used on MOWAG etc

Matt

Maybe its so that a go / no go plug gauge fits with both ends ? ?

I've seen old motocycle gearboxes that use stepped reamers to line ream bronze bushings of different diameters mounted at opposite sides of the gearbox. They are usually fixed size reamers though, for ease of operation by hamfisted motor mechanics.

All you need to do now is find what RR equipment has two holes of the matching diameters set at the matching distance apart that would need line-reaming on assembly or overhaul. Could be anything really.

My guess is a line reamer with the center section guided, I'd put a pint on king pin bushes.

Suppose you have a large flat casting with two pedestal on it one near each end. The hole going through both pedestals. Each one would be drilled and bushed from the out side and some thing would be needed to then line and size each hole up. In line boring would be tricky due to the length of the boring bar and the resultant whip in it and setup time. So you have a set of these reamers, set to various sizes, such as :- dead on, dead on -.005 , dead one -.010. So you inline ream with the smallest, then next size up. . . Eventually the holes will be aligned and to size. Could it be for a RR motorcycle camshaft?

[ There must be an easier way to do it, but not as cheaply ]

Frank

I recently went to Bendigo a gold boom town 150k from Melbourne, the sight of a second hand store was too enticing to pass by.

Nothing much until I spotted the 25mm reamer below, I have not seen one of this type before. there are flutes missing leaving a ground segment. The square shank suggests that it is intended for hand use as does the long taper section. maybe it was designed to enlarge the hole as it reams considerably.

There are no makers or any other marks, The shank is soft steel fusion welded to the fluted section that I assume is high speed steel. Not unusual for a professionally made reamer, that method is used all the time for larger drills and reamers all the time.

Does anyone have an idea what its intended use was?

Regards
John

Edited By John McNamara on 14/02/2018 11:49:14

John,

I wonder if it was a reamer that could be 'adjusted' by putting bits of paper against the un-machined side. Would open the hole out a little if needed.

Regards,

Richard.

A60 King pins were a regular Mot failure on my dads car, the testers seemed to tolerate very little movement and as the garages were the only people with the line reamers they had you by the short and curlies. I bet a plain pin rather than a stepped pin would have lost a lot of business for garages.

Mike

I don't think it was a good idea to post the unusual reamer here, next time I will post separately. I would be surprised if the new type reamer I posted was designed as a king pin reamer, it is not stepped or adjustable.

Richard I am not sure if paper would stay in position.

I do have a set of adjustable Micro Set reamers, they have to be used with some care taking light cuts, and can chatter quite easily. The flat segment on the new type reamer may have been designed to reduce chatter?

Regards
John

just out of interest,

on the Ford Trany we used a fixed broach for the K/pins…..just used the Hyd press..always did a nice job…….

when I left the UK for the second time tried to sell all my King pin reamers BL / Leyland and Ford etc, not takers just threw them away….wish I had em now…..shame………!!!!!!!!!!

clogs

Thanks Bob

That is interesting, I will try it out over the weekend. It looks like the Ratier factory served the aircraft industry.
You have to wonder how it ended up in country Australia?

Regards
J