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Thumler's Model B Tumbler Parts

Model B Rock Tumbler
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.
Rock Tumbler Supplies
Rock Tumbler Supplies
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Belt for Thumler's tumblers

Thumler's Model B Belt


Only $6.99
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.
Thumler's tumbler bearings

Model B Tumbler Bearings


Four for $7.99
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.
3-in-one oil

Stop Squeaky Bearings


Only $4.99
We oil our Thumler's Tumblers every 30 days (or after each batch of rocks) with 3-IN-ONE Multi-Purpose Oil or SAE20 motor oil. Only one drop on each bearing. See our article for photos and detailed instructions.
oil-dispensing-bottle

Needle-Tip Oil Bottle


$3.99 Each
Have your own SAE20 motor oil or general purpose oil? Use one of these needle-tip bottles to accurately dispense it on tumbler bearings and motors. Keep your tumbler running smooth and quiet.
Thumler's Model B barrel guides

Model B Tumbler Barrel Guides


2 for $3.99
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 tumbler retainer clip

Thumler's Shaft Retainer Clips


4 for $3.99
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.
Rubber roller for Thumlers tumbler's drive shaft

Thumler's Rubber Roller


2 for $3.99
3 for $4.99
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.
Drive pulley for Thumler's drive shaft

Thumler's Model B Drive Pulley


Only $8.99
This pulley fits the drive shaft of Thumler's Model B tumblers. It can also be used on any of these other tumblers: Thumler's MP-1, A-R1, A-R2, A-R6, A-R12, Model T, and Model T2.
Thumler's Model B tumbler drive shaft

Model B Drive Shaft


Only $24.99
Thumler's 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.
Thumler's Model B tumbler idler shaft

Model B Idler Shaft:


Only $17.99
A complete idler shaft for the Thumler's Model B rotary tumbler. Simple to replace: pop out the old shaft and put the new one in. Includes: Rubber rollers, bearings, shaft, barrel guides and retainer clips.
Thumler's Model B barrel lid

Thumler's Model B Barrel Lid


Only $15.99
This is the metal lid for Thumler's Model-B fifteen-pound barrel.
Thumler's Model B barrel lid gasket

Thumler's Model B Barrel Gasket


Only $12.99
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"
Model B barrel rubber liner and gasket

Thumler's Model B Barrel Insert and Gasket


Only $79.99
Replacement rubber barrel liner and gasket that gives the Model B barrel its watertight seal and quiet tumbling action.
Thumler's Model B barrel lid wingnuts

Thumler's Model B Barrel wing nuts


Only $4.99
A set of 6 wing nuts to tighten the lid on Thumler's fifteen-pound Model B barrel.
Thumler's Model B barrel lid washers

Thumler's Model B Barrel Washers


Only $2.99
A set of 6 washers for under the wing nuts on Thumler's fifteen-pound Model B barrel.
Thumler's 15lb tumbler barrel

Thumler's Model B Barrel


Only $189.99
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
  Height Diameter
Inside (usable space) 8 1/4 6 1/2
Outside 9 9 1/8
Outside height includes washer and wing nut.

Thumler's Model B metal base

Metal Base for Thumler's Model B


Only $89.99
This is the metal base for your tumbler. There are four pairs of slots to hold drive and idler shafts. Use the two front slots to run two 3-pound barrels on A-R2 shafts. Use the front and back slots to run the Model B barrel on Model B shafts.
Thumlers model B motor pulley

Model B Motor Pulley


Only $7.99
This pulley fits Thumler's Model B tumbler motor. The Model B pulley has a 5/16" bore diameter and 3/4" outside diameter. A 2mm allen wrench is needed to adjust or install pulley.
Thumlers Model B tumbler motor

Thumler's Model B Tumbler Motor - Low Speed (Rock Tumbling)


Only $149.99
This is the low speed (1550 rpm) replacement motor designed for rock tumbling in Thumler's 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.

Thumlers Model B high-speed tumbler motor

Thumler's Model B Tumbler Motor - High Speed (Brass Tumbling)


We don't know when this motor will be available.More Information
This is the high speed (3000 rpm) replacement motor designed for brass tumbling in Thumler's 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.

Thumlers keps nuts

Thumler's Model B Motor Mounting Nuts


2 for $2.99
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. A 9mm wrench is needed to install.
Thumler's Model B rock tumbler

Model B Rock Tumbler


MSRP $436.42
Our Price: $284.99

Adult signature required upon delivery.

Tumbler Only
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

Rock Tumbler Supplies
Rock Tumbler Supplies
Rock tumbler grit Rock tumbler rough Rock tumbling media Rock tumbler grit Rock tumbler rough Rock tumbling media Rock Tumbling Supplies