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| Hobson H7 lathe |
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| mfletch:
This is what one guy is doing with a blown out T slot just mill out and blot a peace in I know its not that easy but its a start |
| Pete W.:
Hi there, Paul, If I understand your situation and enquiry correctly, you need to know the dimensions of the cross-section of the ML7 saddle dovetail on which the cross-slide slides. This includes width, depth and dovetail angle, plus the position of the feed-screw axis in relation to the dovetail cross section. I guess you also seek to know the length of the cross-slide and its feed-screw? Have I understood that correctly? I have an ML7 to which I added the long cross-slide. I have not disposed of the original cross-slide (nor do I intend to!) but I'm quite happy to measure it and post the dimensions here. I also have one of the gizmos that Myford sold to enable the ML7 cross-slide to be used on their ML8 wood lathe. That has the same dovetail as the ML7 saddle, I can also measure that too. (It will be easier to measure than the actual lathe saddle.) If the ML7 saddle dovetail is larger than the corresponding part of your Hobson, I anticipate that the ML7 cross-slide will only fit the Hobson if there's scope to use a thinner gib-strip (and if the feed-screw axis positions are compatible). You wrote that you usually work in wood - what measuring tackle have you got to measure the Hobson parts? I hope to get some workshop time tomorrow - watch this space! |
| parvum:
Hello Pete Thanks for your trouble, The slide on this lathe is as follows: Length 8.45" Width 3.50" Depth 1.00" Dovetail 0.375" deep 1.975" apart at the bottom of the dovetails The centre line of the feed screw looks to be in line with bottom surface of the slide and in the middle of the slide. Please excuse the vague measurements I am used to a steel tape or if pushed a steel rule! The slide dimensions have been taken with a vernier. I would anticipate some fitting to be required as I understand Hobson lathes were made as one offs to order and I bet that none are the same to within a few thou Many thanks Paul |
| Fergus OMore:
I'm pretty certain that quoted dimensions are for a ML7 at 3 1/2" wide but mine is longer at over 10" The configuration, if it is like the lathes.co one is ML7. However, the ML7 looks thinner and weaker! Again, the feed screws are not even similar. Frankly, I'd replace with fabricated steel( despite having one for a ML7( long)) Hope this helps Cheers Norman |
| Pete W.:
Hi there, Paul, I've measured my cross-slide bits & pieces, here are the results: I have to say that I'm suspicious of the height of the male dovetail on the ML8 adaptor - it looks too small for the cross-slide to bear on the right places. I haven't measured the position of the feed-screw, if you do fit an ML7 cross-slide, I assume you'd have to modify the front bracket to take your H7 feed-screw, wherever that is? I haven't dimensioned the angle of the dovetail on the cross-slide - it's 60°, the same as the adaptor. There seem to be a few ML7 cross-slides listed on eBay. I hope this helps - if you need any further dimensions, please ask. |
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