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Common Problem with older JET 14" Bandsaws

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Forum topic by molarman posted 191 days ago 212 views 0 times favorited 7 replies Add to Favorites Watch
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molarman

37 posts in 716 days


191 days ago

I have a JET 14” bandsaw that I purchased new approx. 10 years ago – it is the older blue-green JET color. It has served me quite well, but over the last couple of years or so I have had a problem with the upper wheel. When the upper wheel was properly adjusted so that the blade would track on the crown, the saw would make a “thump thump thump” sound. I isolated the problem to the part of the saw which tilts the upper wheel as it is adjusted for proper tracking. The part in question is the part that holds the “axle” for the upper wheel. As I would adjust the tilt of the upper wheel this part would begin to rub against the wheel itself, causing the noise. Assuming that I had done something wrong (over-tensioned, not de-tensioned at the end of a day, etc etc) I tried to work with it by removing this part and grinding it down to eliminate the interference. This worked, but the problem eventually returned.

The other day I was in Woodcraft buying a router bit and I described my problem to one of the salesman there. His only thought was that it might be bad bearings on the upper wheel. I was about to buy a new set of bearings when the asst manager caught wind of the conversation. Boy am I glad he did. His exact words – “I know exactly what the problem is”. It seems this particular part was built with a bad alloy that would deform over time. This in turn would require the user to crank down on it more which would deform the part even further. He told us that it was very common on JET bandsaws of this era – in fact there was a time when the store was almost flooded with folks complaining of this phenomenon. JET apparently denied that there was an issue of any kind. Interestingly, about this time, new JET 14” bandsaws became scarce due to a “backorder problem”. I ordered a replacement part and it solved the issue immediately. What was amazing is how much the original part had deformed without me even realizing it. Little did I know that that piece was supposed to be flat rather than the mild “C” shape that mine had become.

So if you have a JET bandsaw that is approx 10 years old and are having a similar problem, this is your solution.

-- Woodworking is not a destination....it's a joinery !!! http://smilesrus.com/pages/woodgallery.html

View a1Jim's profile

a1Jim

17022 posts in 475 days


191 days ago

I had one with the same problem

-- Jim from Heirloom Woodshop, custom furniture maker, woodworking school, heirloomwoodshop.com

View molarman's profile

molarman

37 posts in 716 days


191 days ago

Here are some photos to more clearly demonstrate the issue at hand.

This first image clearly shows the degree to which this part had deformed in my machine. The piece that has the gentle curve is supposed to be completely flat.

This second image shows the points of interference with the upper wheel.

This last image was emailed to me by a woodworker who has had the same problem although his bandsaw is significantly newer than mine. In fact, his is JET ivory, not the older green-blue like mine, demonstrating that this had been an ongoing problem with these JET bandsaws. The part on the left is the newer, more robust version of the part on the right, and presumably will not allow such deformation.

-- Woodworking is not a destination....it's a joinery !!! http://smilesrus.com/pages/woodgallery.html

View TopamaxSurvivor's profile

TopamaxSurvivor

3063 posts in 574 days


191 days ago

You would think a reputable company would stand behind their products rather than lie about it!!

-- Debt is nothing more than the 21st Century's form of slavery.

View molarman's profile

molarman

37 posts in 716 days


191 days ago

I’m not by any means “dogging” JET Tools. I have previously owned 2 of their table saws and currently own 2 of their bandsaws, a jointer and a drill press. I have been very pleased with them all, and will consider their products in the future. I have not called them regarding this issue as my bandsaw is now 10 years old, and as such, I don’t really expect any allowances to be made by the manufacturer. However, I thought it might be of interest to others here.

-- Woodworking is not a destination....it's a joinery !!! http://smilesrus.com/pages/woodgallery.html

View tenontim's profile

tenontim

1319 posts in 642 days


191 days ago

This problem happens with all of this line of saws, Delta, Jet, Powermatic, etc. It’s a good argument for not over tensioning the blade and letting off the tension when not in use.

-- Tim -- http://tmuli.com

View TopamaxSurvivor's profile

TopamaxSurvivor

3063 posts in 574 days


191 days ago

I guess now we know where the weak link is in the saws.

A friend of mines dad used to work for a hardware store an appliance repair man. They sent him to a seminar about repairig their line of applicances. The factory guy told him based on their sales data, they should need this many of this part and that many of those over the next x number of years. He asked how they knew that. The factroy trainer said those parts were the ones engineered to fail on each of those appliances. Perry was from the WWII generation, as honest as the day is long and absolutely livid for months. Everyday when Mark came home from work, the first thinng he did was scrape his dad off the ceiling!!

Of course on the flip side of the coin is putting in a shear pin designed to prevent more serious damage. I’m not familiar enough with bandsaw design and use to know which to consider this failure point.

-- Debt is nothing more than the 21st Century's form of slavery.

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patron

2458 posts in 239 days


190 days ago

i think we have all had various orriental tools over the years .
i started noticing years ago that many appeared similar.
came to find out that to be true. they just had different logos and minor variations.
i always go to grizzly tools to get parts and manuals for lobo , sunhill , reliant and various other knok off brands ,
as they have complete parts for their own tools , it can save the time it takes the other guys to get parts from taiwan / china . grizzly is prety good about helping with this and even though their newer catalogs don’t have some previous stuff , you can maybe go online and access older tools they had .
i don’t know much about jet , but it’s worth a try.

-- david ,new mexico ,allheart

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