KomeStone K1 Pro Brushless Rock Tumbler Kit for Adults, Quiet 2.5 Lb

I first have to say I purchased this unit on sale it appeared good quality and robust. I had never really used a rock tumbler since I was very young. Then it was a novelty item given to me by my parents. Living on the beach with a variety of rocks all over the place I went to work collecting and had this unit working for a couple months at a time never stopping except to change grits. To my dismay the motor stopped. I contacted the seller. Gave them the situation, within a week I had a replacement motor. They were fast to respond for the initial contact (24 hours). After sending a video I was back up and running in a week. I sure can't complain. Thank you. As to the quality of the unit. It is simple and staight forwad to use. The tumbler is robust and it never leaks. There are instructions with the unit. I have bought other brands, had issues with leaks and failures after weeks. Another brand even melted. I am very satisfied with the quality of this unit and their customer service.

I ordered this on impulse as my daughter had a national geographic tumbling kit. That one is mediocre at best, however I've always wanted to have one. So, I bought the pro K-1 brushless, and I'm impressed with the rubber basin and how airtight sealed it is. Works incredibly well! Functions are simple to use. Great storage capacity also. The instructions are detailed, easy to understand, easy to follow through. They provide two extra pulley belts for the machine. A screwdriver to pop the lid, as the lid recesses into the rubber basin. There's another lid that goes over that with a butterfly style handle/screw. I have mine set up in my shed, as it's much quieter than the previous rock tumbler I experimented with. This one is awesome because it has a built-in timer that sets how many days you would like to tumble the rocks. The instructions have guidelines and suggestions. And then it also has the speed ratio. There's a pause/play button, so if at any time you want to check on the progress of your tumbling, you may do so and press pause and not lose your day counts by powering it off. This kit comes with grits, step 1- thru 4. They're one time use. KomeStone has grit kits available to purchase and reasonably priced for future tumbling sessions. I'm obviously on day 1, but I'm excited to check back in a few days. Not sure if Amazon allows for video updates or anything of that nature, but I'll try if it allows.

Loving my K1 tumbler! Have used it for almost a year now and the results are just as I expected! Some of the rocks come out lovely but primarily I use it for shaping sea glass and pottery sherds for jewelry. Works great! When I had an issue with the lid (totally my fault) they quickly shipped me a replacement part.

We’ve been really happy with this tumbler so far (picked it up as a Christmas gift). Not too noisy, a nice selection of similar hardness stones, and the instruction manual was actually quite good for explaining the steps etc… Only two things we’ve noted: the stage 4 1200 grit isn’t really enough to leave the stones with that bright and shiny polish, so you’ll need to pick up a 8000+ grit as well. We’ve also noticed that it sometimes doesn’t want to turn back on after stopping (mania or automatic). No apparent reason, but fiddling with it a bit seems to reset whatever the issue is and let you get back to tumbling. All in all quite satisfied, but we’ll see how time tells.

I’ve run this tumbler nonstop 24/7 for just over a year. It’s still going, though the lid seal and rollers are worn. Pros: Easy to load, countdown timer, pause button, durable barrel, brushless motor holds up well, fairly quiet, compact, no leaks, and low energy use. Cons: Even on the lowest speed it’s too fast for anything beyond shaping rough rocks and can bruise softer ones (even with ceramic media). You can’t slow it down enough for later stages without changing pulleys. Doesn’t restart automatically after a power outage, and belts wear quicker than I’d like. If you haven’t heard it enough already, the polish that is provided will NOT give you the high polished shine. Overall: Excellent for rough stage one rocks. Once the rough edges are knocked off I move the rocks to a slower tumbler to finish stage one and beyond. It’s a reliable workhorse, though I’ll get the standard motor next time since it’s easier to adjust the speed.