I'm stumped, need help: Trying to do a little repair for my MIL's sewing machine. It is old, and - I believe - of Japanese origin. FWIW, while I dont suspect most of you cats are big on sewing machines, this thing is an absolute RIPPER! lol Anywho, trying to find a replacement for a screw that's seen better days. First problem is I can not identify said screw. The major dia is ~ 0.169" / 4.29 mm. Similar to English #8, or metric 4.5 (if such a thing exists). The thread pitch is larger than 0.6mm and smaller than 0.7mm. In english, that would be finer than 36 TPI, but coarser than 40 TPI. I thought i was onto something with a British BA4 thread (~38.5 TPI), but the diameter is off. Anyone? vince
Is it on a part where drilling it out and tapping it to a standard size is feasible? It sounds like that is probably the easiest option.
If it's older Japanese, it's probably a British copy. Whitworth, maybe? I have heard stories that Japanese cars were identical to Brit cars in every way before the Japanese went to their own bolts and standards, maybe this sewing machine is the same. I agree that it might be easier to drill and tap for a modern fastener. What's the make, model, and year of the sewing machine?
tks guys; keep 'em coming. im familiar w/ m-c but very unlikely they'll have what i need. if i confirm the thread it will almost surely call for a specialty supplier (or ring to a friend outside the US). i cant recall the machine brand offhand. not sure it will help, but will see if i can confirm it. unfortunately, i dont think so. access to the fastener head from above (or lack there of) is in part why i'm looking to change the fastener. problem is this is for a plate right under the foot of the sewing head....so the machine arm is right above it and occludes a straight shot down to tap it. that's why i was optimistic when i came across the BA spec...but that definitely isnt it. again, not sure the MMY info will help but let me see if i can confirm it (the machine is at MIL's house, 50mi from me at the moment). appreciate any/all add'l thoughts. vince
I'm guessing 11/64-40 thread size. A weird one for sure. http://www.gewinde-normen.de/en/sewing-machine-thread.html
Japan had their own thread sizes up until the late '60's I believe. Their's was called the JIS standard. I've learned of this trying to find OEM hardware for my '64 Honda Dream.
how bad is the screw? how many do you need? could you take it to a machine chop hand have them replicate it?
commercial or household? can you post a pic? if I don't have one Banasch's in Cincinnati probably does . bill and darethea
hmmmm. it is a commercial machine. my in laws used to sew 'professionally'. i also can now confirm the brand is JUKI. i could take a pic of the screw easy....the machine would take some time. vince
JUKI Banasch's sell JUKI . if you know the name of the part the screw attaches they can send you a match. bill if the machine is in a table with a clutch motor and leg lift it's most likely industrial . if it has a little tiny motor bolted onto the back of the machine and an electric foot pedal household. bill
tks! dude, i'm guessing you would like this rig. the motor is like 5HP and runs off 230 VAC (thought about swapping it for the one on my air compressor! lol). it is a f'in beast. knee-controlled presser foot; table mounted; clutch-actuated; the whole nine yards. i got sucked into this since i'm MIL's handyman, and i had to fix the clutch pedal (not sure what you call that bit). the linkage came loose. this part is one of two little screws that holds a plate under the presser foot. not the one you remove to access the bobbin (which is tool-less), but an adjacent one for access to clean the bits under the table. tks for the tip, i'll check into it. still wish i could ID this damn thread thoe! vince
