We sell replacement motors, bearings, guides, shafts, retainer clips, barrels, retainer rings and lids. To purchase a complete machine or get more information, visit our Model B tumbler page.
Thumler's Model B Belt
This Thumler's Model B belt can be changed out without the use of any tools. Remove the old one and slip on the new one. It is that easy. This belt also fits all Thumler's A-R model tumblers.
Model B Tumbler Bearings
Thumler's Model B bearings are made of durable polyethylene. Bearings are simple to replace. Remove the retainer clip, slide the old bearing off, put the new one on, and replace the retainer clip. We suggest purchasing some extra retainer clips just in case you damage some while removing or replacing them.
Model B Tumbler Barrel Guides
Thumler's Model B barrel guides are made of polyethylene. The guides are easy to replace. Remove the retainer clip, remove the bearing, rubber roller and then the old guide, slide a new guide on and put the other parts back on the shaft. We suggest purchasing some extra retainer clips just in case you damage one.
Thumler's Shaft Retainer Clips
Retainer clips are used to hold the bearings on the end of the shafts and to hold the nylon rollers in the proper location on the idler shaft.
Thumler's Rubber Roller
These rubber rollers are on both the drive shaft and idler shaft of a Thumler's Model B tumbler. This differs from all other Thumler's tumblers which have nylon rollers on their idler shafts.
Model B Drive Shaft
Thumlers Model B replacement drive shaft that is easy to replace. Remove the belt, lift out the old shaft, snap in the new shaft and put the belt back on, and you're ready to tumble. It is a complete shaft with all components already on it.
Model B Idler Shaft:
A complete idler shaft for the Thumlers Model B rotary tumbler. Simple to replace, pop out the old shaft and put the new one in. Includes: Nylon rollers, bearings, shaft, barrel guides and retainer clips.
Thumler's Model B Barrel Lid
This is the metal lid for Thumler's Model-B fifteen-pound barrel.
Thumler's Model B Barrel Gasket
This rubber gasket is what gives the 15-pound barrel on a Thumler's Model B tumbler a watertight seal. If you are trying to use this for a different tumbler barrel, be sure to take accurate measurements. It usually does not fit other types of tumblers.
Diameter = 9" Hole center to hole center = 8" Hole diameter = 9/32"
Thumler's Model B Barrel Insert and Gasket
Replacement rubber barrel liner and gasket that gives the Model B barrel its watertight seal and quiet tumbling action.
Thumler's Model B Barrel wing nuts
A set of 6 wing nuts to tighten the lid on Thumler's fifteen-pound Model B barrel.
Thumler's Model B Barrel Washers
A set of 6 washers for under the wing nuts on Thumler's fifteen-pound Model B barrel.
Thumler's Model B Barrel
Thumler's Model B rock tumbler barrel is a large hexagon barrel with a 15-pound capacity. It is a metal and rubber barrel that comes with all the parts included so you can start tumbling as soon as you receive the barrel in the mail.
Barrel Dimensions in Inches
Inside (usable space)
Outside height includes washer and wing nut.
Model B Motor Pulley
Temporarily Sold Out
This pulley fits Thumler's Model B tumbler motor. The Model B pulley has a 5/16" bore diameter and 3/4" outside diameter.
Thumler's Model B Tumbler Motor - Low Speed (Rock Tumbling)
Temporarily Sold Out
This is the low speed (1550 rpm) replacement motor designed for rock tumbling in Thumlers Model B rock tumbler. It is a thermally protected motor that will shut off automatically if it gets too hot. Easy to replace, just remove the belt, mounting screws and replace. This motor does not fit other tumblers.
Thumler's Model B Tumbler Motor - High Speed (Brass Tumbling)
Temporarily Sold Out
This is the high speed (3000 rpm) replacement motor designed for brass tumbling in Thumlers Model B tumbler. It is a thermally protected motor that will shut off automatically if it gets too hot. Easy to replace, just remove the belt, mounting screws and replace. This motor does not fit other tumblers.
Thumler's Model B Motor Mounting Nuts
Two keps nuts (nuts with attached, free spinning, star-shaped lock washers) are used to keep the motor in place. They screw onto the two motor-mounting bolts where they extend through the motor-mounting brackets.
Model B Rock Tumbler
Thumler's Model B is a 15-pound capacity rotary rock tumbler.This tumbler is very durable and can handle pieces of rough up to 3 1/2 inches in diameter. More Information