Hello,
I have a question in regards to understanding how sewing machine specifications translate to what I actually need the machine for.
The machine I am looking at is a Singer 20u73 zigzag.
The first question I have is about the needle and thread size range.
In the manual (linked below), page 3, shows a chart on what needles the machine can take. With this information in mind I look at the chart found from the thread "Needles And Threads" from this forum (chart linked below).
So to me, it looks like the needles range from, 10-19, which I can only assume is the Singer needle number.
Now I look to the chart, and the range of thread this machine can handle is Tex (I'm assuming Tex) size, 12-92?
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Anyone who understands what these numbers mean can probably see I am stuggling to understand what I am looking at. I have been trying to understand needle sizes and thread sizes for months now. I just can't seem to grasp needle sizes to the appropriate thread sizes, then how that looks in real life.
If anyone can help me to understand how to read these numbers and get a unquestable answer I would be greatful.
Manual, http://parts.singerco.com/IPinstManuals/20U73_73B_83_83B.pdf
Needle and Thread Chart, http://raphaelsewing.com/blogimg/techsew_ndl_thread_chart.pdf
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The second question I have about this machine is about what it can sew through. I sew with denim to make jeans. One of the reasons I wanted to look into this machine was because I could make a version of a bartack (and it was in my price range, I found a good deal locally 500ish).
I need this to make a bartack on the belt loops. So that means dense material folded, so all in all going through about 8ish layers of denim.
How can I tell from looking at the specifications of this machine if it can do this successfully and repeatedly, or not.
I have searched many articles/forums on google, watched every youtube video I could find of this machine and no one has shown an example of what this machine can do. Basically all I have seen is this machine going through a piece of thin leather and a double stack of thin apparel material, which tells me absolutely nothing to what the limit of this machine is.
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I hope someone out there can shed some light on my problem.
Thank you for your time,
