Installing a Cam Stack Gear on the Bernina 730 

What a professional, wow! This man must be a trained mechanical engineer. Just wonderful to watch.

Thank you for this video. I just purchased this machine very cheap and discovered the problem is the cam shaft gear. Took it to the shop and I helped him find out the problem. I will ask my husband to watch this video with me several times and see if we can fix it ourselves. I didn’t even need the machine, but I couldn’t help myself paying $25 for it!!

Dear Mr. Iund, thank you very much for this tutorial! My Bernina 707 had a broken cam gear. With your instructive and precice video I was able to understand, repair and adjust the machine successfully. I am so happy! Thank you for sharing your expertise and knowledge on vintage Bernina sewing machines. Compliments also to Mrs. and Mr. Watson for their thoughtful recording. It was a great pleasure to watch this video. All the best for you and your coworkers from Freising, Gemany Udo

Thank you so much for this video. I recently purchased a 730 Record online and knew based on your videos that we would be able to bring her back to life. And sure enough, it was a repair we could make ourselves and the machine is now running beautifully. Thank you again!

Mr. Iund - just a quick thank you for EVERYTHING. You presented it all so well. I was able to replace my cam stack gear in my 830, and fix the parabolic timing thanks to you. You are a huge blessing, as no one would repair this antique beauty. It would have been a sin to trash or part out this machine. Thank you so much for taking the time to make this.

Neal Thank you so much. I used your video to change the cam stack gear on my 707. Most importantly I was able to reset the worm gear using your video. A number of other youtube videos had how to change the cam stack gear but no mention of the worm gear and the problem of up-side down parabola. Sure enough had the problem. I did need to rotate the shaft more than 360. In fact a number of turns. Kept trying until i got it right. Then tested by sewing. AGAIN!!! Thank you so much for the time you take to set up and record your very clear instructions. MM.

I just picked up a used 730 record at an estate sale. I am not a real sewing person. I am an old man. I like mechanical things. Sure enough, the gear is only half there.I am going to try changing it so I will watch this video a few times. It is so beautiful inside and I am going to have lots of fun cleaning, inspecting, repairing and lubing it. and then watching it perform.

What a super video, Neal. I have this precise problem with one of our machines, and while I could have fumbled through some of the more basics aspects of the repair, I'd have come unstuck at several points along the way without your guidance. I'm ordering the part tonight and will post my - hopefully successful - outcome once the job's complete. Articulate and beautifully presented. Thank you!

Great video! I look forward to seeing the next one.

Hi Neal. I just found your RU-vid channel. It's awesome! Its good to see you. 🙂

Dear Sir. Thank you very much for this very informative video. As I recently purchased a Bernina Record 730, I am keen to see as many service techniques and tricks as possible.

Thank you! This is my next repair as a new tech and my trainer is amazing so I want to impress him with doing my homework. This is so helpful!

Hi Neal - please move to UK, prefereably next door. Going to look at your site to see if I can get some answers. These machines were BRiLLIANT.

Your videos are beyond education! Thanks a lot! I fixed my broken Bernina 830 based on your videos (also the timing was very helpful). One thing that I noticed is that if the selector level finger does not sit properly on the patterns it will jump and make a noise. This may happen due to different dimensions of the new part and the selector finger may tough the neighor patterns causing wear, jump and noise. So I think the lever position ladder had to be also adjusted for the first and the last patterns so that it fit properly on the patterns.

Wow! Not sure if I am going to tackle this, but it was very informative! I am going to watch it a few more times.

Excellent video Neal. I trained as an Industrial Sewing Machine Mechanic in 1972 in Ireland and worked both in Ireland and Canada for many years. I'm retired now and still doing service and selling a few better quality machines. Just picked up a 730 and fortunately the gears are good. My theory on why these gears break, is expansion and contraction of the metal. When the core shrinks, it breaks the bond with the plastic/nylon gear, and you get a bit of "Play" which eventually breaks the plastic. There isn't much torque on these gears so they should last. Any Play in gears is eventually going to cause problems. Manufacturers started using plastic as people demanded lighter and quieter machines, and of course cheaper machines. A few manufactures have gone back to bronze or brass. To build a machine of this quality today would cost over $3,000. As sewing machines are precision and need to be built with good quality materials, you have 50 year old machines like this 730 still being used today. My one worry when repairing older machines is Electrical issues. I have seen exploding capacitors and Foot Controls starting fires. How many people would use 50 year old electrical appliances? I always encourage serious sewing enthusiasts to get old machines that are well built, but take it to a qualified Mechanic to have it checked out. I also advise that people only use Mineral Oil, as other oil leaves residue and you will be left with Varnish. Many machines also use Wicks to lubricate parts and using the wrong oil will eventually mean the wick plugs up and even though you add oil, it doesn't get where its needed. Thanks for the excellent video and good advise.

Great video! Thanks for sharing your information...

Great video as always.

Bloody fantastic Neal. Thank you. You have explained everything beautifully. I managed to get my crappy Chinese repro gear in and the swing timed perfectly thanks to you. Yes it has the slackness but it seems to be impossible to find a good one. If you sell good ones I will order some.

Thank you so much. I have a 730 Bernina Record and wanted to get to know it a bit more so I can do some basic maintenance and adjustment. Your video was so helpful and I feel confident to give some simple checks a go with my machine.

This video was very helpfull sir! Very good explanation. Thank you very much. Greetings from the Netherlands

Great information - thank you!

This guy is the High Priest of sewing machine mechanics! Watch and learn you saucy tinkerers.. ☝️😇

beautiful machines

Thank you, you help me very much ❤️

Confidence boosting and very informative, I have a 830, 801 and a 707 (with a split in the cam) and just acquired a 740 favorite which I believe is similar to the 730 so will be using videos regular as a reference . The 740 has a seized satin lever and knob, wouldn't it be great if you did a tutorial on that , sorry I'm just being selfish. Great tips though.

Geat video.Thank you

Merci beaucoup

Thank you more than I can say for the time you spend making these videos. They are amazing, easy to follow, and show the close-up areas with great detail. Question: What variation in size of the replacement Cam gear can be tolerated? The gear you show has a profile that is also off center. Is it even possible to find replacements that are NOT off center? You discuss undersized gears. What is the risk if you end up with a gear that measures a bit larger? I guess in summary, how do you know when you receive your order for a replacement gear, how do you know if it's worth putting into your machine? And how much help are digital calipers, even if you have a nice set?

Hello, first of all, this is a very educating and thorough video and we all thank you for that. My question is, can I clean bernina from an old oil just by spraying it from top compartment. with some isopropyl alcohol in a can? And after that, just lubricating at the red points. The reason for this is that machine I bought stayed in some place without air circulation and oil attracted and was infused with all those fine prehistoric smells of good old days ))) I have cleaned the bed from an old oil and replaced the mat, then cleaned the motor compartment and motor. Now when the motor runs and heats up - no more smell from that area. But the biggest area of smell is ofcourse in the upper region. This is why I need your advice. Should I remove the bed and just spray it from top with ipa or acetone and lubricate afterwards? Or maybe there are plastic gears somewhere inside that would get ruined in the process. The ones I see, I could maybe avoid from spraying. I don't know how many are there in total. Or is it much safer to do it step by step? Just thinking about that makes me cringe, because I don't have knowledge/tools/service manuals to make adjustments afterwards if something gets installed wrong. Thank You once again for you contribution!

Muchos gracias muchas ayuda para me 非常有价值的视频 ，对我很有帮助，感谢你的分享，👍👍👍😀

Wonderful video! I have also found that Goo Gone works to dissolve oil lacquer, keeping all those chemicals away from the plastics and rubber. In all my years of "all vintage machine" repair (so not an expert on any), I have seen one 730/740 (I think) with all metal gears. Was there one or am I thinking of a different model? Thank you for keeping these wonderful machines from the knacker. :)

Hello, I would like to express my appreciation (along with many others) of your brilliant videos. I have recently acquired a Bernina Record 530 , I think it has probably not been used for many years but it looks in good condition and works, however the ornamental stitch selector will not move. I wonder if someone could advise me please? I've oiled it carefully according to the instruction booklet.

Hi. Enjoying your video on this machine. I have a 530 record it will zig zag but I can’t get the patterns to work. All levers move freely. Would appreciate any help plz

Thanks....thanks....very nice

Also just to say that I've watched this video very carefully, but as far as I can see the Camb Stack Gear is not broken on my Bernina

How to open the top please

In case you can see this question- I got a 540-1 favorit recently. No surprise it’s a beautiful machine. Other problems have al been sorted except a broken worn wheel meaning zigzag stitch only without pattern stitches. Now got to know here cheap spare parts are readily available, so intend to fix this. But I’ve chucked out the broken part. Do you have the specs of this worm wheel? Diameter, number of teeth etc. Thanks!

Do you by chance have a part number for that Bernina cam stack tool? i have done enough of these at this point that it would nice to have one.

Great video. I have a bernina 730 record that has a broken pin that rides on the cam cluster. Is it possible to source this item. Hate to have this machine nine functional for such a small part

Hi Neal I love your videos! I have bought an 830 Record at a sale b/c I grew up on my mom's and she still has it and the price was irrisistable. I took the cord in to get it replaced at a local Bernina sew & vac. They said they could put a new end on the cord, but not to start the machine b/c the gears may crack. Soooo. I have restored a lot of 1940's singers and vintage knitting machines. Marvel Mystery Oil works wonders on knitting machines. Do you think it would be useful to soak the gears with MMO to prevent cracking? I have found it to be safe for plastics and metal. Or what would you suggest? Thank you.

can you instruct me on how to open all the covers on my bernina 770 QE, I need to clean inside completely cuase a did a lot of sewing with canvas that was treated with something that let a lot of dust all over, please advice, my bernina dealer is too far away and i don't have a car.

Hello Neal, I'm wondering if it is worthwhile to replace the motor on a Bernina MiniMatic 707? It belonged to my mother in law, and when she passed my wife took possession of it. Problem is, my granddaughter leaned her laptop computer against the foot control with just enough pressure to cause the motor to activate, but not actually turn.. it sat that way for quite a period of time, causing the motor to overheat to the point it totally destroyed it, burning a hole in the carpet, and almost burning my house down. The machine sewed many articles of clothes when my mother in law had it, and it has some sentimental value. Is it possible to find a used motor, or I'm wondering if the cost of a motor would make it worth repairing the machine.

plz more videos

Hello sir, Can a singer 3314!c singer that doesn't take cams be converted to a singer 3317 that does take cams by changing it to a multi cam mechanism bloke the singer 3317

I'm located in Australia and was surprised to see that my Bernini 730 has a metal cam stack gear. It is a second hand machine and I do not know if it is original or a replacement.

Would this work for an 830. Sorry if u answered it already in the video. I just started watching

Recommend a source for the Worm Gear?

great video...have a bad vertical gear on my 830. ugh

Gear camstack for brother zu2 b680

por favor en español como subir y bajar los dientes de la máquina

hello, i am very sorry to hear that another irreplacable Galactic Pot-Healer is in better place now. Especially that myself i am struggling with correct setting of my bernina 730. unfortunately in Polando i haven't found a one living soul who would have any idea about servicing bernina. had to get manual, setting book, exploded view and even tools catalogues in order to replace camstack and vertical gear. all i need are technical dimensions of servicing tools. I would really be grateful and appreciate if somebody please help me with a tool referencing number N32NU2. This is a needle-like looking tool used for centering oscilating block of a zigzag operation. This place seems like the last spot i could get help. Anyhow i wish You all Happy Every New Year and much healt, wealth and PEACE! Whoop Whoop!

bernina 217

ترجمه

Good effort, but very poor lighting. Unfortunately you confuse gear with stack too often.