Terrible design flaw and weak materials in this latest O.S.S.

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Review by CyberDyneSystems posted 06-20-2016 05:39 PM 7634 views 0 times favorited 15 comments Add to Favorites Watch
Terrible design flaw and weak materials in this latest O.S.S. Terrible design flaw and weak materials in this latest O.S.S. Terrible design flaw and weak materials in this latest O.S.S. Click the pictures to enlarge them

We’ve wanted an O.S.S. in the shop for some years.
This year we had a windfall from the University and I was given 30 days to spend the money. (this is sort of a thing at Universities!)

For new machines in the $1,500.00 price range, I had settled on the Jet JOVS-10 some time ago based partly on my experience with the bench-top JBOSS-5. (which I have reviewed favorably in the past, and own at home)

Low and behold, Jet has replace the JOVS-10 with a newer model that sports many improved features.
All the online review sights seem to rank these improvements and the model highly.

Now normally I will not make a purchase of such an investment without getting my hands on it in a showroom etc, but two things made that impossible.

1- Short turn around, must get 3 bids, purchase orders, shipping etc, it all had to be delivered in a matter of weeks.

2 – Here in Rhode Island, there is not a single place that one can find one of these (or any woodworking machines) on display, In fact even over the borders in neighboring states I could not find one in a showroom.

The Sander arrived late last week, making our deadline of June 30 with room to spare.


As seen in the first image above, there was a problem right from the get go. The table which is designed to tilt front to back, has a decidedly noticeable lean to the right. Hmm.
As we moved it into location, one of us lifted from the table, and the right side managed to “pop” back up into place!

The next images I hope show what is happening, the “Trunnion” (as the JET parts list calls it, I use air quotes as to me a trunnion is a much heavier cast assembly with grooves and ways machines into it) is really nothing of the sort. It is a piece of stamped light gauge sheet-metal as opposed to a casting, and has absolutely nothing holding it onto the very small casting JET refers to as the “guide block”.

The guide block in fact is also nothing of the sort, having absolutely nothing on it or near it to actually guide the compass aspect of the “Trunnion” it is a mere fraction of an inch surface onto which the 1/16th or so steel compass is expected to sit, with nothing on the side to prevent it from slipping off.

Well it so happens that in the case of my unit, that’s exactly what it is prone to do any time you touch the table.

My temporary fix is seen above, where I removed the red angle needle and replaced it using the same screw and threaded hole to mount a washer which will prevent the trunnion from sliding off again.

The table on the JOSS-S is massive cast iron, (one of it’s selling points) and it is suspended above the base and spindle on these two half moon “ears” of light gauge stamped steel that has no lateral strength what so ever, and no guides to prevent it simply bending out, and dropping down.

The rest of the sheet metal seen below the arc cut out, the more substantial part with the degree numbers stamped into it, rests on NOTHING! It is simply floating in space, and is clamped from side to side when the tilt lock knobs are tightened.

I suspect that given the shipping method (fully assembled in a crate) that a VERY large percentage of units will receive a knock that will cause the inertia of the table to push the trunnions “ears” off side enough to bend them and drop the table, just as mine did.

Further, with such a massive heavy cast iron table on the spindly house of cards, even when the trunnions are not slipping, the table just does not give the impression of being stable.

With the largest 3” diameter spindle installed, the machine does not appear to have enough strength to hold it straight while running. I do not feel too much deflection with it switched off, and with the bare spindle, or a smaller one, this is not noticeable, but with the 3” spindle it wobbles far off center as it strokes up and down. For this I will call JET and see what they suggest. I’ll update with results later.

Despite ease of access to handily stored accessories, table inserts, spindles, the actual task of swapping spindles is a chore. Access to the spindle lock and the nuts that hold the spindles on is very difficult. The oversized table is hard to get around, one feels a lot like a plumber working under a cramped bathroom sink cabinet.

The included wrench is terrible. Using it to get enough leverage to nut down a spindle, while also gripping the spindle lock is difficult. The stamped steel wrench is easily replaced with a more durable and easier to use wrench, but then we are faced with the spindle lock, also stamped steel, doing the other half of the job, and it is not so easily replaced.

The magnet provided to make the wrench easily accessible is not strong enough to hold the very flimsy light stamped steel wrench’s minimal weight, and the self adhesive that was intended to hold the magnet strips on to the wrench is too weak to do that!

The power switch though seemingly prominent, is placed too low on such a tall machine. The green switch is very odd to turn on, and the oversized red paddle to turn it off does not behave as one would expect, ie: not a paddle at all, but in fact just an oddly shaped button. Again, the oversized table helps to make getting at the power switches awkward at best.


A lot of the lay out of the machine is quite good. The table, when it isn’t flopping over to the side, is at a good working height of just over 39”, which is similar to most Bandsaw tables.

It’s cabinet has storage for everything! The cabinet door lock required reading of the instructions to figure out how to open it, but from then on it’s great to have access to the accessories.

The large protruding knobs that are used to control the tilt lock of the table are about the only thing near the top of the unit that are actually easy to get at. One can see from the stock photo how long the shafts are, which contributes to the ease of access here.

For anyone that does not need a production tool of this size, I would urge you to consider the smaller 1/3 price JBOSS-5. It is overall a more robust design for the class tool it is, and would compare very well to some of the floor models.

If a floor model is required, I’d suggest you look elsewhere. This tool is as whimpy as a do it yourselfer home owners tool under the hood, and simply not up to the task of a full on production tool. Perhaps the older JET JOVS-10 would be a better investment, sacrificing some convenience for a more durable design?

I admit that I am used to far more robust tools of an earlier era.
That said, I am have some modern machinery in my shop as well, such as an Original Saw Company 12” Radial Arm Saw, and a SawStop ICS, and even a “Chinese” Rikon 18” band saw. These heavy duty production tools in no way disappointed me. The Rikon cost me about $600.00 less than this sander and is SUBSTANTIALLY a more robust tool that I expect will last decades longer than the decade it has already served us well.

-- Without the wood, it's just working

View CyberDyneSystems's profile


309 posts in 3432 days

15 comments so far

View bobasaurus's profile


3735 posts in 4428 days

#1 posted 06-20-2016 06:21 PM

Looks like a poorly-made tool, thanks for the heads up.

-- Allen, Colorado (Instagram @bobasaurus_woodworking)

View pintodeluxe's profile


6488 posts in 4057 days

#2 posted 06-20-2016 06:45 PM

Disappointing to hear that Jet missed the mark on this one. I have had good luck with my Jet floor models, but haven’t used this one yet.

I would really like to see someone add an OSS with belt attachment to their lineup (similar to the Ridgid, but a floor model). The Ridgid is great for a home shop, but isn’t really built to withstand constant use or students.

Thanks for the review.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View JPJ's profile


821 posts in 3864 days

#3 posted 06-22-2016 10:35 PM

Good review I’ll stay away.

View Richard's profile


1944 posts in 3934 days

#4 posted 06-24-2016 07:44 PM

Send it back and stay away from Jet from now on , And let them know your doing it. And a link to this review to their Customer Support Dept. .

View CyberDyneSystems's profile


309 posts in 3432 days

#5 posted 06-24-2016 08:44 PM

I wish I had the option to send it back, if it was a personal purchase, I would absolutely do that.

In this case, with the odd nature of the University’s fiscal year deadlines, If I don’t have it or another one in the shop on June 30, I won’t have one for years to come. No way I can get it returned, and a new PO approved, and another delivered in time.

Silly I know, but out of my control.

In the meantime, I have been hacking the table support to fix shipping damage and make it more sturdy.

-- Without the wood, it's just working

View Mikesawdust's profile


330 posts in 4283 days

#6 posted 06-27-2016 12:42 PM

We have much the same purchasing problem in the government. The woodshop on base purchased a new planer with motorized adjustments and digital readouts. In our case it is a nice shelf, it wont feed wood that isn’t Flat already and even flat wood has to be pushed and pulled out the exit side; making it a workout for two people. They have had the store maintenance person come and adjust it three times over the past four years with no improvement in it’s function; they had to pay for this service as well. Being rushed to purchase usually doesn’t work well for the customer.

-- You never cut a piece to short, you are just prepping that piece for a future project

View Dedvw's profile


176 posts in 4125 days

#7 posted 06-29-2016 04:19 PM

It’s sad when a company designs a load bearing component so poorly. Thanks for pointing these problems out, this machine was on my hot list, but not anymore.

View Rzani's profile


8 posts in 1690 days

#8 posted 04-10-2018 03:02 AM

I’m a little confused. So it was “shipping damage” that caused the issue with the trunion not working correctly? Otherwise the tool is fine?

View CyberDyneSystems's profile


309 posts in 3432 days

#9 posted 04-30-2018 07:04 PM

I’m more confused.

Should I just copy and paste my fairly in depth review with photos of the poor materials used in the construction here, or simply ask you to re read what is posted above?

Do I repeat the further problems listed under “THE BAD:” that had nothing do with the weak sheet metal trying and failing to hold the top on?

Very confusing indeed.

In brief, many pounds of cast iron table sits upon light gauge bent sheet metal. If yours arrives in place, ie: it has not slipped off the sheet metal ears they laughingly call “trunnions, rest assured, without making your own modifications like I had to do, it will slide off those trunnions any time enough lateral force is applied, like, in use for example. There is absolutely nothing holding the parts captive.

-- Without the wood, it's just working

View Rzani's profile


8 posts in 1690 days

#10 posted 04-30-2018 09:43 PM

Wow. At your very nice prompting, I re read your review. Again I came away thinking your machine was damaged in shipping which has caused your trunnion to not be working properly. So they used a lighter weight steel to make it out of but would you care if it worked correctly? I mean sure you’d probably want it to be thicker but if it never gave you issues would you still care all that much? I think the question has to be asked because many others seem to love this unit which leads me to believe the lighter weight stamped steel isn’t a problem after all unless, of course, it is damaged in shipping which would then cause it to not function properly. Your prediction that a VERY large percentage of units having this issue doesn’t seem to be happening?

Your “in depth” review was 95% about this trunnion issue (including the 3” not being supported because your trunnion is jacked I assume) and then you don’t like the stamped steel wrench and the on/off switch location? Come on man. Oh, and the table is too BIG?

I think we all get frustrated when our tools don’t work like they are supposed to but I’m actually looking to buy a spindle sander and have to weed out the real problems. When I see a 2 star review it scares me, but when I read your review I came away thinking you are upset because it isn’t working right and it isn’t working right because of a shipping mishap. Makes me think the machine is fine otherwise (outside of the cheap wrench, on/off switch location and a nice big table of course which aren’t going to bother me anyway). At this price point for a floor standing unit I think I’ll take my chances that the stamped steel trunnion will work properly if it isn’t damaged in shipping. Maybe I’ll knock a star off for cheap materials when I do my review.

View CyberDyneSystems's profile


309 posts in 3432 days

#11 posted 05-01-2018 06:45 PM

I am sorry my review did not meet your approval.
All I can do is post what I find.

If it helps, the 3” spindle issue is not in any way related to the trunnion issue. The spindles will work with or without the table installed. The problem with wobble has to do specifically with the motor/armature/mount.

I like the large table, it provides excellent work support. Sad that the trunnions can not support it when I have heavy work on top without some alteration to the design.

If it helps to clarify, it’s been two years since I posted this review. We continue to use it in the shop and it performs quite well after the alterations we did to it so make it more reliable. Shortly after posting the above I contacted jet, and after a few back and forths a set of replacement trunnions they sent me behaved no differently from the ones it arrived with. There was in fact no actual damage from shipping, and jet’s replacement part confirmed this. The table trunnions, as mentioned, slipped off of their mounts as there is nothing to hold them on. This did not cause any damage, and no damage created the situation.
With the new part, the same thing happened in use, thus the jury rigged alteration.
In my discussion with Jet, I tested the waters re: a lemon and a full replacement, and they seemed to feel that the unit was behaving as intended.

Lastly, in the years since purchasing I have come across another unit on the floor of a retailer. I was confident that the table would come loose if lateral pressure was applied.

This unit has at least one design flaw. The flaw is NOT that the table is too big, no the table is wonderful. It’s that it does not have a substantial enough build to support the table it uses. Combine this with the fact that the 3” spindle can not be made to be accurate/vibration free, and the smaller bench-top JBoss 5 is easily a better buy.

Good luck with it. It absolutely can be made to work well.

-- Without the wood, it's just working

View Rzani's profile


8 posts in 1690 days

#12 posted 05-01-2018 07:07 PM

Okay, now that is crystal clear! I really do appreciate the extra feedback. You have to remember that I don’t know you. I mean this is the internet and I can’t count how many times someone has given a perfectly good product a bad review to “get back” at a company for various reasons not related to the quality of the actual product. There are actually plenty of examples of that right here on this forum’s review section.

I believe you that it wasn’t shipping damage now. I’m actually shocked that Jet would continue to sell this machine with such a glaring issue. I’m not sure how they are even getting away with it. The other thing is this machine is being recommended to me by a very reputable dealer who also sales the Grizzly and Laguna units. He claims people are happiest with this one? I was leaning towards the more expensive Laguna. Decisions, decisions.

View CyberDyneSystems's profile


309 posts in 3432 days

#13 posted 05-01-2018 08:11 PM

I understand, I do try to be objective in my reviews.

If it helps. here are a the few others I have posted here;

It includes a mush more favorable review of the smaller bench-top Jet JBOSS-5

-- Without the wood, it's just working

View jkinoh's profile


104 posts in 3141 days

#14 posted 02-05-2020 07:31 PM

Ran across this post, and thought I’d give my opinion, even though the review is a couple years old. I’ve owned the JOVS-10 (previous model to the one the original post referred to) for about 12 years. I paid roughly $760 for the machine. It’s not an everyday machine that I use, but it has definitely not sat quietly in the corner of the shop. The sander has been a solid, trouble free machine. Too bad Jet updated (rather than upgraded) the sander and apparently cheapened it. If you can find a JOVS-10, don’t be afraid to buy it.

-- Why buy it for $300 when you can make it for $500!!

View CyberDyneSystems's profile


309 posts in 3432 days

#15 posted 02-15-2020 07:31 AM

Thanks for your input jkinoh.

I had seen the JOVS-10 a few years earlier and that was the one I wanted. Sadly when we purchased, none could be found, and we just assumed that the newer model would be an incremental evolution, not a total overhaul with such a weak point.

-- Without the wood, it's just working

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