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I suspect we have all come to the end of this thread! My view, and that of most of the postings, is that epoxy is not suitable for holding scales to a mill. It just doesn't work. Please use small screws in (probably) newly tapped holes. M4/6 size is fine. You can use JBWeld as a...

Jason. Julius emailed me the article which was identical to your posting with no further information. Mike

In a word - or two - Don't even consider using adhesives. The design of an adhesive joint is complex and would require the removal all all paint in the area. Cast iron is very easy to drill and if you are concerned about breaking the tap then just dill oversize - there is very little strength...

When I purchased my Warco Minor/Grizzly G1005Z mill I found that there was excessive backlash on all axis. Having tolerated this for several months I decided to fit a 3 axis DRO. This was a "Wow" moment. Suddenly I had control of the axis with the ability to swap between mm and imperial, zero...

SirJohn The key to a successful DRO is the quality of the product. Cheap systems are based on the digital Vernier. There are useless and have far too much lag in their reading. You should use either glass scales or preferably magnetic scales which are smaller and a 2 or 3 axis readout unit...

Jason you are a star - thank you. I have emailed Waal and if I receive any better info I'll post. Many thanks Mike

Does anyone know how I can access the article referenced in the plans? ORIGINAL DRAWINGS AND BUILDING INSTRUCTIONS WERE PUBLISHED IN THE SCIENCE AND MECHANICS MAGAZINE OF OCTOBER 1955 BY JOEL.B.LONG, UNDER THE HEADING "CYCLONE" UNIQUE 3 CYLINDER ROTARY STEAM ENGINE AND BOILER. I have tried...

Hi Richard Thanks for the info and indeed all the other Kiwi photos you have posted. I did find this crank small end bearing difficult to machine. I should have removed more material on the mill to reduce the interrupted cut which was my main issue. I found that I needed to use the rear...

Ken I have just made a few measurements and I can't see that there is sufficient space for clamps using the vertical configuration. There is just under 5/8 clearance between the journal cheeks and the cross slide. One solution would be to weld 2 pieces of MS to the tool and then tidy up the...

Guys - thank you for your thoughts. Unfortunately I can't use any form of jack since the space between the cheeks is only 1/2inch which is the same as the journal I am trying to cut. Ken I really like your vertical cutter. I was proposing to purchase a 7/8 deep parting off tool blade but that...

Guys I am struggling!!! I am trying to machine the Kiwi crank and so far I have failed to find the correct cutter. The picture shows the tools I have used all of which have an overhang of around 35mm. The tipped parting tools seem to "wobble" and I fear the carbide insert will spring out. The...

Guys The coin rotation paradox has caused many minds to melt! It can easily be shown physically that with 2 coins of equal size - (I always favor 2 silver dollars pieces!) then the moving coin rotates twice. David Ding has produced an elegant proof for those those who like to tidy up loose...

Guys What we are talking about is the Coin Rotation Paradox which has similarities with the famous Asistotles Wheel which mathematician puzzled about for centuries. Looking at the coin Paradox and simplifying it and making use of Stan's tooth idea we can have a linear gear of 60 teeth and a cog...

Stan and Toymaker you both make good points. I have used a vac to remove chips but the down side is the noise and the need to have a "reasonable" sized nozzle to prevent blocking. I like the small air pump. Never thought of that and being small I guess its reasonably quiet. My alternate...

Clockworkcheval, Yes it is interesting that different countries have completely different views about humour - some can't even spell humor! Japan is an interesting example of adverts which would never be allowed in the UK. I was once told by my Head Teacher at school to never discuss/joke...

Guys I have really found these post very helpful and I think that Andy is spot on - your first sentence sums up what we should all aim to do. "If it works don't fix it!" Many of these posts are worth a second read as they contain a wealth of experience - thank you. I had dismissed the use of...

We have a very helpful and wonderful engineering community and we should be proud of that and not be offensive to each other. Mathematics is full of interesting and non-intuitive puzzles (which should really reside on YouTube) which often don't have obvious answers or even answers at all...

Has anyone ever considered using wet/dry paper suitable held in an expanding lap. I have often wondered if it would work provided it could be held without tearing. Mike

Its a good post Timo but there is one omission concerning us modelers. In general we don't use exotic inserts or high load deep cuts and our materials are limited - if indeed we know what grade they are. So given that, and returning to coolants, can we say what is the best approach? Full...

Jason That is very good advice and what I was looking for. I had hoped that I could re-use the expanding lap and you clearly find that they can be cleaned. I guess I now need to decide if lapping is necessary! Many thanks Mike