kgg

No problem. I've had one for about 5 years. kgg

Temu: https://www.temu.com/ca/1pc-nut--thread-checker-inch-metric-26-male-female-gauges-stainless-steel-14-inch-12-metric-thread-checker-g-601099524615655.html?_oak_mp_inf=EOfbjp2m1ogBGiA5ZWNhMmYwZDdjNzU0NDAzOTViNDEwNjIyZTM1MWViZCDflrjLwTM%3D&top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2FFancyalgo%2FVirtualModelMatting%2F1bd1d6e014704d792beadf80a72c5b49.jpg&spec_gallery_id=2025093704&refer_page_sn=10032&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=MTY4OQ&_oak_gallery_order=2093112306%2C160354140%2C2045537314%2C271545300%2C1416541352&search_key=nut and bolt thread checker&refer_page_el_sn=200049&refer_page_name=goods&refer_page_id=10032_1769953176822_anhrd4lta2&_x_sessn_id=3raljzhp3j Aliexpress: https://www.aliexpress.com/item/1005009944813944.html?algo_pvid=598db5f1-c508-430c-ba85-99afda6fd421&algo_exp_id=598db5f1-c508-430c-ba85-99afda6fd421-6&pdp_ext_f={"order"%3A"7"%2C"eval"%3A"1"%2C"fromPage"%3A"search"}&pdp_npi=6%40dis!CAD!28.44!22.09!!!142.79!110.89!%402101c44f17699531248835014ee51d!12000050647125799!sea!CA!0!ABX!1!0!n_tag%3A-29910%3Bd%3A18b3922%3Bm03_new_user%3A-29895%3BpisId%3A5000000197831932&curPageLogUid=ItEaF9KDGd9H&utparam-url=scene%3Asearch|query_from%3A|x_object_id%3A1005009944813944|_p_origin_prod%3A kgg

Here is a great article on what machine or machines you will need depending on what you want to sew. In a nutshell if you are doing: i) Belts and bags a cylinder arm machine similar to the Juki LS-341 or Juki LS-1341 or clones would be a good choice with a flatbed attachment. ii) Holsters you will need a Class 441 similar to a Juki TSC-441 or clone. What is your budget??? kgg

@catskin @friquant Here is a cheap quick nut and thread gauge that costs under $17 CAD ( $12.50 USD) delivered off Temu and Aliexpress. kgg

Interesting. Finding bolts that fit properly for sewing machines can be a chore at times since a lot has to due with whether the manufacturer is using standard bolts with standard thread pitches or they are using a particular manufacturers specific bolt thread setup like Singer and to lesser extent Juki and Juki clones. Sometimes you can sorta kinda get a Imperial bolt to fit in a metric hole but most times you have to re-thread the hole to get a proper fit. Most machines these days are made using the metric system (International System of Units - SI). The problem of trying to match bolts sizes tends to be a more of a problem in the US as most of the world uses the metric system (International System of Units - SI). Even in Canada and to some extent the US it is not that uncommon to see three systems ( the Imperial, the Metric and the America ) of measurement being used. kgg

I threw in towel about 22 years ago and the first thing I done was turned off the computer and threw out the cell phone (it "fell" out of the truck on the highway). Never touched either for 3 years. Done what we were planning for five years, move to another province, build a new house, opened a dog boarding kennel and showed our dogs. A far cry from my engineering background. Should have done it earlier. I do things that interest me, no deadlines, no boss except for the wife. The hardest part was figuring out my interests and how to combine them, like 3D printing, leather, sewing machines, metal welding, metal lathes etc. which are all interlinked. Remember working for the man is just a means to an end. One door closes and another opens. kgg

Not even close. The machine appears to have been repainted with the name tag also painted over. From the factory i) setup for binding ii) factory needle system was 134-35 LR iii) Max size of needle is a metric 100 (#16) iv) Max thread size is metric 40 (V69) Value: Unknown. If it was used in a commercial environment it may need unknown repairs so it would be wise to have someone check the machine over before purchasing. How much are they asking??? Most importantly what do you want / need to sew????? kgg

Looks like a Consew 206RB-3 from the 1970's. Based on exterior condition, wouldn't be my choice for that price. kgg

Lets face it, It ain't a hobby it's an addiction. Just depends on which rabbit hole you go down. The worst is buying a machine that will not do what you thought it would. I think a lot of use have done that at some point. No one machine will do everything. My personal thoughts If you are: i) sewing wallets and typical belts, a Class 341/1341 like a Juki LS-341 / LS- 1341 or clone with a table top attachment would be a good choice. ii) sewing thick / tough leather with V207 and above, a Class 441 like a Juki TSC-441 or clone or one armed bandit is needed. The thing a lot of people forget is if you buy a Class 441 machine the needle is basically the size of a 2 1/2" finishing nail which is going to punch a really large hole that may not be suitable for say a wallet. The 90 percent rule: Buy a new machine that meets 90 percent of your sewing needs / wants. For the other 10 percent buy a good used machine. kgg

An alternative to the class 441 machines like the machines you listed ( CB3200 and the Cobra Classes 3 and 4 ) would be the one armed bandits. Those that are currently available are the Tippmann Boss (~$1000), the Cowboy Outlaw (~$1500) and the Weaver Master Tool Cub (~$2150). kgg

The Techsew 2700 is a Juki LS-341 clone. I would use the engineering manuals or video's for the Juki LS-341 or LS-1341. kgg

Sorry to here that. I would post on ( https://www.kijiji.ca/ ). Post an advert of each machine with photo's and a realistic price. kgg

Since you ordered #18 needles order V69 which you get A&E thread as well as others from wawak,com. kgg

Simple answer, No. The difference of going from a fabric needle (135 x 17 ) to a leather point needle (135 x 16 ) is the tip of the needle. The fabric needle (135 x 17 ) will attempt to push a hole through rather then slice a hole in the material. You will have to check the top thread tension, bobbin tension and presser foot tension. Also a bonded polyester thread would probably provide better UV protection then Bonded Nylon thread. kgg

Here is a link to the actual Juki LS-1341 brochure which will give you the definitive comparison on all specs for the 1340 series machines. ( https://www.juki.co.jp/industrial_e/admin/pdata/filedata/332/ls1340.pdf ). If the machine was new yes. With used machines it could be iffy on the smaller thread sizes which will be an individual machine ability depending wear of internal parts typically whether it was a hobbyist machine or a machine that was used in a commercial environment. No, but I don't use threads less then V92. The only then is you have to change your top thread tension and bobbin thread tension when going from thread size to another, when you change to a different spool of thread, thread type and even color. Not going to happen that is why a lot of use have more then one machine. Machines for the most part setup to basically do one function. My thoughts: i) The Juki LS-1341 is basically a functional Juki DNU-1541S in cylinder arm form. The main concern I would have with the LS-1341 in thin material is the material being sucked down into the feed dog as the hole is fairly large. This may not be the best machine for your needs and maybe a Pfaff 335 or clone or a post bed machine would be better options as they are inclined towards smaller thread sizes. ii) How thick is the thickness material including folded over seams that you want / need to sew with what size of thread?? You really need to ask what was overhauled internally and externally for the machine, like timing belt, bushings, thread tensioner, thread guides, etc. What is the asking price for the machine. kgg