Model B, catalogue number 140, is the heavy end of the Thumler's line: 15 pound capacity, a steel frame and a thermally protected motor, offered in a standard version around 1550 rpm and a high speed version near 3000 rpm. Oil ports on the motor and bearings mean it expects maintenance instead of replacement, which is why reloading forums still run decades old units for brass case cleaning.
For rock tumbling the high speed variant is the wrong tool, stones need the slower barrel rotation, so match the version to the job before ordering. Capacity like this only pays off if you actually feed it: a half empty 15 pound drum tumbles badly. It costs several times more than a 3 pound hobby machine, takes real bench space and is noticeably louder than a small rubber barrel unit.
No reviews yet — be the first!