Tray
Aluminum
- Joined
- Jul 22, 2009
- Location
- Southampton UK
Looking for some advice / thoughts on to make some straight edges from two blanks taken from an scrapped antique lathe. Both are just over 30” and 5” deep and are typically as per the images and approximately
dimensioned as per these sketches.
Blank A is a little wider at the base and the dovetail is currently 55° I thought this would give me a bit more meat to machine it to 45 °. The large rib along the top does not continue the full length.
I do not yet have a surface plate and am looking at 24” x 18” as being the max I probably need or can fit in my workshop. I may be able to stress relieve by heat treatment.
Here are my thoughts
Am I correct in thinking that it will be easier for me to learn to scrape in the 12” first ?
I appreciate that these will never be Kingway camelbacks, but I have seen Youtubers make some nice straight edges from a similar starting point.
dimensioned as per these sketches.
Blank A is a little wider at the base and the dovetail is currently 55° I thought this would give me a bit more meat to machine it to 45 °. The large rib along the top does not continue the full length.
I do not yet have a surface plate and am looking at 24” x 18” as being the max I probably need or can fit in my workshop. I may be able to stress relieve by heat treatment.
Here are my thoughts
- As I neither need nor will be able to check a 30” I cut the ends @ 65° as shown by the blue lines – that way losing the section where there is no stiffening rib.
- The stiffening rib is substantial @ 1 x 0.7" and offset so perhaps I can machine some of it away to lose weight.
- Machine away the other bosses and clean up the vertical ribs
- The vertical ribs will not be centred along the length so if no one says otherwise I’ll put a couple of lightening holes equidistant between them as per the sketch.
- Perhaps for the other blank I could make an 18” and a 12”?
Am I correct in thinking that it will be easier for me to learn to scrape in the 12” first ?
I appreciate that these will never be Kingway camelbacks, but I have seen Youtubers make some nice straight edges from a similar starting point.