Tru-square Metal Products Model B Heavy Duty 15# Rock Tumbler, THU140

15lb tumbler and from a company that has been around for ages. My first Thumler Tumbler was bought for me about 1968 and it still works great today. I have only had to change drive belts after all these years. The new tumbler I bought for larger processing size. One thing to note for people not familiar with tumbling in general. this tumbler and any rotary tumbler are made for softening and rounding the stones and do so by the hexagonal barrel causing the material to move more with the grit and becomes a more aggressive tumbling process than a vibratory tumbler which is more designed for polishing than shaping a stone. That is why polishing such as ammo brass and other polishing is done with vibratory tumblers. If you only want to polish a stone that is already smooth then go Vibratory and Thumler's Vibratory tumblers are equally as well built as I own those also.PROs:1) The heavy steel construction, it will last a lifetime2) Rubber Inner Barrel cuts down on the sounds of tumbling. If you've ever heard a cheap tumbler with a plastic barrel you know what I mean - won't name names but buy quality not cheap junk.3) Inner Barrel and lid gasket are replacable if you ever have to and they are not expensive.4) Same strong motors they've used for generations and they just work!5) Inexpensive rubber drive belt you can buy anywhere and they all work6) Torque. The motor can drive heavy loads with ease.Cons: None really but one suggestionOnly one and it has nothing to do with the tumbler but a person preference. I would much rather have a round knurled nut instead of wingnuts for the lid hold downs and maybe some rubber track on the bottom of the unit. In place of the missing rubber feet I just place the unit on an old shop towel to not have the vibration of the unit transferred to the concrete making it even quieter.I would buy one of these any day of the week. They work great!

Love this product. It runs smoothly and quietly. I have mine on a piece of flexible insulation (K-flex eco) on a tile floor on concrete. I say all of that to say that it is almost silent, you can barely hear the rocks tumble. I had it directly on a wood cabinet and you could hear it 50 ft. away. So if you are having problems with the sound I would just change the location. It is built out of very thick steel and around 1/4 in rubber as the lining. The lid has a little bit thinner rubber, and wing nuts that are easily replaced at your local hardware store, but mine haven't worn out. I may post some pictures of polished rocks, but don't really see the point they are indistinguishable from ones that you can find at a souvenir shop. The motor is pretty cheap (I am an electronic technician), but built rugged, so although it is single speed and not very efficient it should last for years as long as you keep the dust out. The belt on mine hasn't worn at all after several months. The only parts that have seen any wear are the red paint where the drum sits on the drive shaft (from getting grit on it after changing to a finer grit), and the rubber guide piece on the drive shaft where it keeps it straight.

Overall good tumbler.Some shortcomings to be aware of:1. It doesn't come with any kind of feet to sit on, no rubber pads, nothing. Seriously? We had to drill 4 holes to bolt on rubber feet, to keep it from sliding around the concrete floor while it's working. Seems like this should be a basic aspect of design, kind of ridiculous to have to do this yourself as the end user.2. Unlike some of the larger, more industrial tumblers that we use, this only has one drive roller. When the barrel is wet or somewhat imbalanced (depending on what you're tumbling), it can occasionally stop rotating. Dual drive roller system would've been preferable.3. No on/off switch. You have to plug/unplug the cord to start and stop it. Not a major issue, but just gets annoying over time, especially when other tumblers manage to incorporate an on/off switch.

Have done several batches and is still working fine. Size is right for me.

The media could not be loaded. When I first got this, I was very disappointed. Some of the metal frame was bent and the pulley was covered in grease apparently so it didn’t get any traction to spin the barrel. Contacted Thumler Directly and spoke to someone who walked me through getting it to work. Wiped off any grease residue that was on the pulley cord and the pulley itself and it was able to spin.Had it for several months and it has been working and it does its job. Polished up quite a few beach rocks and they look great.That being said, I still have some criticisms of this product. It’s definitely overpriced. The motor runs very hot. After less than 3 batches the inner lid gasket is already wearing thin and about to tear. Thumler apparently charges like $18 for a new thin piece of plastic to put under the lid as a gasket. (FYI, you can buy 1/16” Thick rubber sheets by the foot for much cheaper and just make the gaskets yourself). Also, the barrel doesn’t roll completely straight and it starts to slide off to the side and grind away at the roller edges leaving red and black dust all over the bottom.Also, I suggest buying the bulk grit and polish, don’t bother getting the small 1 pound of each stage kits- I’ve gone through over 10 pounds of stage one grit in less than 3 all stage completed batches. (you will use the most step 1 grit, most of the other stages are 1-2 weeks max , but often times I’ve had to keep stubborn rocks in step one for 2-4 weeks to get the shaping I want. Stel 1 grit is available in 10lb buckets for about $30 on amazon).All in all, this seems to be a decent tumbler with an impressive capacity, That being said I still feel it’s way overpriced. $200… maybe $250.. either one of those would be a fair price for this machine- But at its current price, I have to say this model is not worth it.