what is the largest size stone it can polish?

I've polished agates the size of small eggs. It's good to add smaller ones to help polish.

Can this unit handle stainless steel shot? If not, which model would you recommend?

I would think that it could. This unit is very good. I have had no issues with mine. I bought special media for polishing bronze. It worked great.Another option would be one of the heavier duty rotating tumblers.

Is this good for brass cases? I want something heavy duty that will really clean my cartridge cases well.

I've had an Ultra-Vibe 18 for about 25 years and have cleaned many tens of thousands of cartridge cases... It works very well. In fact, it has held up and worked so well that I was surprised to see it is still produced!

What size motor is on this tumbler?

The label reads: 115V 1.6A 60 Hz 3000rpm 1/20 Hp I purchased this to use at the college for my students it tumbles with 15 lbs stainless steel shot and burnishing compound. This is the second one that I now use for 200 students and it works excellently.

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✨ Unleash Your Inner Artisan with Every Vibe!

VERSATILE USE - Perfect for gemstones, glass, and more!
DURABLE DESIGN - Built to last, ensuring countless hours of creative fun.
TRANSFORM YOUR ROCKS - Achieve a professional polish effortlessly!
USER FRIENDLY CONTROLS - Simple settings for beginners and pros alike.
WHISPER QUIET OPERATION - Tumble in peace without disturbing your zen.

The Thumler's Tumbler Ultra-Vibe 18 is a high-performance vibrating rock tumbler designed for both hobbyists and professionals. With an 18 RPM speed and a heavy-duty motor, it ensures efficient polishing of various materials, including gemstones and glass, while maintaining a whisper-quiet operation.

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Reusability	Reusable
Product Care Instructions	Machine Wash, Hand Wash Only
Material Features	Insulated
Material Type	Brass
Item Weight	17 Pounds
Number of Items	1
Unit Count	1 Count
Shape	Round
Pattern	Solid
Theme	industrial
Style Name	Modern
Additional Features	Break Resistant, Insulated

Thumler's Tumbler Ultra-Vibe 18 Vibrating Rock Tumbler

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