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Jet 1642 question

C

Carl Scott

Joined
Feb 1, 2023
Messages
20
Likes
5
Location
Tulsa, OK
I own a Jet 1642 lathe and have started to get chatter while turning a large 12” bowl. The bearings probably need to be changed along with the belt. How hard is it to change the bearings (I have watched a couple of videos and they have made it appear easy).
Do I need to spend the big bucks and buy Jet bearings and belt or can I buy another brand. I looked at Timken bearings and belt but any other ideas about brands I am interested. Also what part number do you recommend?

Thanks
 
The machine shop that changed my sold 1642 bearings were easily accessible and did not have much wear. I included the old bearings with the sale.
 
I changed both a few years ago on a Jet I used to own. I had zero previous experience with anything of the sort, but didn’t have any issues at all.

One thing I did do which I found helpful was to take plenty of pictures along the way. I used the edit app on my phone to mark orientations on the pics so I could remember key things I noticed when taking it apart.

I’m sorry, but I do not remember the brand of bearings I bought. They most definitely were not the Jet ones though. They fit perfectly and made a dramatic difference. Good luck!
 
As long as the bearing specifications and size are the same, you can use non Jet bearings. Changing bearings is not overly difficult, but does have it's challenges and tooling needs. Bearing puller and/or a press. Often heat and cold are your friend. To get a new bearing on the shaft, it may be necessary to heat up the bearing - doing this over a 100 watt incandescent bulb for a couple of minutes will often provide just enough expansion to make it slide on without a press.
 
I had a 3520A, years ago. During a sanding spree, in getting ready for a long Christmas show, the bearings went. I took the headstock to a local tool repair place, and they fixed the bearings and put on a new belt for less than I could get the parts for from PM. Well worth the effort. I found out after that I should have removed the motor before taking the headstock off. Would have made every thing easier. Not sure what is involved with that...

robo hippy
 
When i changed the bearings on my Laguna, I found the best price from MOCHU Bearings on Ali Express. I also upgraded from general purpose 6 series bearings to precision 7 series spindle bearings. The 7 series are angular contact, so they handle pressure from the Tailstock better, and need more preload. It does matter which way you install them. There is a triangle etched in the side to show direction. Just substitute 7 for 6 in the bearing number. So 6206 and 7206 are same size, but 7206 is an angular contact spindle bearing.
 
Does it matter if the bearings are shielded or sealed. Also on the belt it has a Carlisle 180J belt but how many ridges do I need
Thanks for all the info
 
The bearings would have to be so noisy, it would hard to use the lathe if they were so bad that the movement was causing the bowl to chatter. Take off the belt, put a steel rod in the chuck, and measure runout with an indicator. I feel pretty certain you will not discover bad bearings. How old is the machine and how many hours a week do you turn on it. Bearings in a lathe last an incredibly long time.
 
Not sure what you mean by chatter but, I have a 1642 and I've had what I would call a ticking sound from the headstock. Eventually found the set screw in the locking collar inside the headstock had come loose allowing it to move around a bit while turning.
 
Carl Scott said:
Does it matter if the bearings are shielded or sealed. Also on the belt it has a Carlisle 180J belt but how many ridges do I need
Thanks for all the info
Click to expand...
Just buy bearings with the same number, including the letters like "zz". They will be shielded or sealed if needed. If you're in a big place like Tulsa, you may have a bearing supplier, as John mentions. If not, you can get both bearings and belts from online suppliers of those specific goods (not from China via Amazon) at good prices. I can't recall the name of the belt place, but super nice and helpful people with good products at a fair price, and every belt you could possibly want. Maybe somebody can post the name/address of the belt outfit--I think it was in Texas or Louisiana.
 
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www.beltsforanything.com
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Randy Anderson said:
Not sure what you mean by chatter but, I have a 1642 and I've had what I would call a ticking sound from the headstock. Eventually found the set screw in the locking collar inside the headstock had come loose allowing it to move around a bit while turning.
Click to expand...
I have also had this issue and have seen it on multiple jet and powermatic lathes- simple fix-
 
Changing bearings was pretty simple. I watched the YouTube above a couple times to be familiar with all of the parts. then went out to the shop and started disassembly. The one thing in the video which was incorrect was the guy kept saying not to touch the sensor of the RPM reader. That is just a light and the reading is made by proximity not a visual. Good luck and let us know how it turns out.
 
I have rebuilt several metal turning and wood turning lathes over the years and have purchased bearings off of eBay on numerous occasions. and they all worked fine. Just so long as the bearings are still wrapped in their protective packaging, they should be good. You will find a big difference in pricing depending on where you purchase them. When I find the correct bearings for a machine at a discount, I usually purchase a 2nd set of bearings for spares that I keep on hand for when they ever go bad, I have them on hand.
 
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