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Member postings for Steamer1915

Here is a list of all the postings Steamer1915 has made in our forums. Click on a thread name to jump to the thread.

Thread: Knurling with a single knurl
25/03/2013 10:22:02

Fine straight knurl on 66mm dia EN1APb. Sounds familiar - I've just done that, times 25. As Gray says, it's not a two second job, although by number 25 I was starting to get the hang of it!wink

Thread: Emco FB-2 Milling Machine improvements
12/03/2013 18:26:00

David,

I have made some stops for the X axis on my Bridgeport. I made these despite having a DRO already fitted. I had a lot of repetitive work to do and needed to be able to approach a position without the fear of over shooting the mark. DRO or not, it is too easy to go past a predetermined position (even heading to zero)and spoil ones work.

Excellent work as usual Gray.

Steve.

 

Edited By Steamer1915 on 12/03/2013 18:26:41

Edited By Steamer1915 on 12/03/2013 18:27:22

Edited By Steamer1915 on 12/03/2013 18:29:10

Thread: No. of divisions
28/02/2013 22:29:19

Don't understand your second line John. However, I've just spent half an hour or so checking the actual measurements on my S7. I clamped a small angle plate to the bed at the headstock end and made sure it was square to the carriage travel so as to avoid sine errors. Using slip piles of various lengths between 1 and 11 inches, I was able to see that the error (such as it is) was no more than 1/2 thou per inch over all measurements. That's close enough for me. In an earlier post, I alluded to the point that I thought that the actual measurement would be slightly longer than the dial reading and this has proved to be the case. Job's a gud 'un!

Steve.

25/02/2013 18:55:40

John,

Thanks for the confirmation about the Myford rack and checking my figures. I was starting to think that I had missed something - even more so after posting!indecision

Gray,

I absolutely agree about theoretical figures as opposed to practical uses. If I have not completely fried my brain on this, a complete turn of the graduated dial (1" will actually move the carriage slightly more - in theory. I would suggest that (again, in theory) that this is a condition that will only improve as the rack and/or gears wear. So, if the carriage was moved from an unworn section of the rack, to a worn section, any error will reduce. I have one of your dials fitted to my S7 and it has transformed the lathe. I have not come across any situation where I would question it's accuracy. I need to do the 10" slip gauge check just to see where it sits on my lathe. I can certainly see why they are so popular and why so many have been sold over the years. My post was really just to question Anthony's figures and to make sure that there isn't a better iteration. After consulting gear ratio tables in Machinery's handbook, I feel sure that there isn't - or not one that would fit into the existing body. Thank you for your thoughts on this.

Best regards,

Steve.

 

Edited By Steamer1915 on 25/02/2013 18:56:19

25/02/2013 12:09:01

Anthony,

How have you calculated the 0.866" distance for one complete revolution of the Myford handwheel? I ask this because I make it 0.8617". I arrived at this figure based on the following:- The pitch of the Myford rack is .15708" (3.1416/20dp). The apron reduction gearing is 35/16 which equals 2.1875. One turn of the 12t gear (that engages with the rack) 12 x 0.15708" =1.885". Divide this by the 2.1875 reduction and the answer comes to 0.8617". If the 28/26 gearing is applied twice the distance moved is .99936". The only assumption I have made is that the Myford rack is 20 DP but I have no reason to think it is isn't. I can't see how any of the alternative gearing that you propose, will improve the accuracy.

Steve.

Thread: Stuart V10
29/01/2013 09:09:46

On a slide valve engine such as the 10V, the chances of blowing a cylinder cover off or bending the rod or very small. In all likelyhood, all that will happen is that the valve will lift from the port face and the condensate wil escape through the exhaust.

Thread: NEW Original MYFORD Dickson type tool posts & holders
08/01/2013 10:22:28

I have just received 8. Excellent quality and good comms. I would echo Chris' point about Brunell, having had a very frustrating experience with Graham a couple of years ago.

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