Looking for cylinder arm for leatherbag making. Necchi 840-100

[Gregg From Keystone Sewing]

9 hours ago, luxuryluke said:

Hello, @Gregg From Keystone Sewing, Great to find that you’re on here! Do you think there’s any chance this might fit my 355 style machine? Let me know if I should take a pic. I’d appreciate your advice. It’s been troublesome finding a flip down roller guide for my machine (no screw holes).

https://store.keysew.com/parts/sewing-parts/gr1245-spring-edge-guide-foot-set

Thanks for asking, Necchi does appear to be the same, but I'm not 100 percent sure. 

[luxuryluke]

Thanks for the info, @Gregg From Keystone Sewing. I’m on the lookout. 

• So, yes, looking for the best way to have an edge guide for consistent results.
• I’m also looking to make a table adapter for my machine. Currently the options on the table are sheet aluminum or steel.
• servo arrives tomorrow!
• Ordered the SP2 speed reducer from Bob @ Toledo IndSew. It’s not on his website but he has them at a great price. ;
• spent some time doing stitch lessons and getting accurate on the machine. I’m a noobie but I’m learning. Cylinder arm is the way to go for me!

 

[luxuryluke]

• Servo rocks! Very happy with it. 
• Tinkered with urethane round belting instead of round leather or v belts. This is much nicer!
• Speed reducer arrived! Installing it now. Thanks, Bob @ Toledo.
• Table adapter designed and ordered to be laser cut and etched in stainless steel.
• Mostly disassembled the needle and bobbin area, tested a few different presser feet and feed dog setups. Cleaned it all up and aligned the parts anew. 
• Problem: Trying to detect what needle is in there since I’m not sure it’s correct but I seem to need a jeweler’s loupe to see it. Tiny letters!
• Problem: the hook is kissing the needle, strangely even more when no thread is threaded in. Need more research. It’s hitting the area below the cutout.
• Testing out some Serabond 30 (size T90) thread from a friend at an upholstery shop from way back (Josh @ Relicate Leather)
• Have read a lot more of @Wizcrafts generous wisdom articles. There’s always more to learn.
• More sewing excercises! Hand eye coordination. Thanks for reading.

[Bugstruck]

Found this. May be some help on the needle type. Start there. May have the right needle in it now and may not. Need the right needle to calibrate it.

https://www.industrialsewing.co.uk/industrial-sewing-machines/needle-feed/necchi-840-136-industrial-cylinder-arm-needle-feed-machine

 

[Bugstruck]

135x17 is the same as DpX17 as I recall. 

[luxuryluke]

On 3/21/2019 at 5:44 PM, Bugstruck said:

135x17 is the same as DpX17 as I recall. 

Oh, thank you so much! Where do y’all buy needles these days?

Also, I’m guessing the leather version of this needle is the 135x16? 

Edited March 24, 2019 by luxuryluke

[Wizcrafts]

4 hours ago, luxuryluke said:

Oh, thank you so much! Where do y’all buy needles these days?

Also, I’m guessing the leather version of this needle is the 135x16? 

Precisely! Good guess. Walking foot system 135x16/17 are sold everywhere industrial sewing machines and their needles are sold, both online and offline. I happen to get most of mine from Toledo Industrial Sewing Machines. Other times I simply buy a pack or two on ebay. Be sure to check out the titanium coated needles if you sew through 3M leather tape or glue.

[shoepatcher]

I would also try Steve at Cobra.  He is in your neck of the woods.

glenn

[luxuryluke]

Thanks, fellas. I've ordered five different sizes in that needle.

Updates:

• Hopefully will find the right needle size that works well on my machine and T90 thread.
• Then I'll try to find a needle size that works well on my machine for T135, as well.
• The Serabond outdoor thread from Germany is awesome
• The speed reducer from Bob @ Toledo is awesome
• The servo motor with slow start feature is awesome. I'm now operating at 1000rpm with ease after hours of practice with this feature in use. Recommended.
• the round urethane belting is awesome. No issues. Let me know if you'd like to learn more.
• the stainless steel plate for a table adapter is AWESOME. Might need to add some pipe clamping underneath it for stability, round the edges with a tool, polish the edges, too. Pics soon!
• Might need a new table top to convert this standard KLegs table into a Space Saver cylinder style table. It's too big and can't take full advantage of the cylinder with it as is. Maybe a 18" x 24" 1.5"thick butcher block will help me make quick work of it. This may take a while.
• The presser feet with an included spring guide that i found at relatively low cost are too high. Dremeling it may or may not work for what I'm after. Perhaps just the magnetic seam guide for now.

Edited March 25, 2019 by luxuryluke

[luxuryluke]

So five packs of different thicknesses of needles arrived for use with my T90 and T138 thread. It turns out that the 135x16 leather needles are a tad too long and hit the bobbin case outer preventing full sewing action, and I tested it inside the cavity of the bobbin at bottom dead center (correct?) as well and it hits that, too, preventing furth rotation. I should’ve taken a pic to show the needle length difference but I took a trip to a sunny beach instead. 

It seems to me that the proper size needle is somewhere in between the two. The “scarf” area on the current short needle is too high when the hook drops by to grab the thread loop. Consequently the hook is hitting the fat sharp end of the needle (just barely) instead. 

I’ll post pics when I return.

Edited March 30, 2019 by luxuryluke