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Thumler's Model A-R12 Tumbler Parts

A-R12 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 A-R12 tumbler page.
Rock Tumbler Supplies
Fee mining collecting map
Rock tumbler grit Rock tumbler polish Rock tumbler rough Rock tumbling media Rock tumbler grit Rock tumbler rough Rock tumbling media Rock Tumbling Supplies

Belt for Thumbler's tumblers

Thumler's Model A-R12 Belt


Only $5.99
Replacing a broken A-R12 belt is an easy job that requires no tools. Having an extra belt around is good practice so when one breaks you don't have to wait for one in the mail to continue tumbling.
Thumler's tumbler bearings

A-R12 Tumbler Bearings


Four for $5.99
Thumler's A-R12 bearings are made of durable polyethylene. Bearings are simple to replace. Remove the retainer ring, slide the old bearing off, put the new one one and replace the retaining ring. We suggest purchasing some extra retainer rings just in case you damage some while taking it off or putting it on.
Thumler's nylon guides

Thumler's A-R12 Barrel Guides


2 for $2.99
Thumler's A-R12 tumbler barrel guides are made of nylon which makes them durable. You won't have to change these very often but when you do it is a simple job. Remove the retainer clip, remove the bearing and old guide, slide on a new guide and replace the bearing and retainer clip. Purchasing some extra retainer clips in case you damage one is a good idea.
Thumler's tumbler retainer clip

Thumler's Shaft Retainer Clips


4 for $2.99
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.
Nylon rollers for Thumlers tumbler's idler shaft

Thumler's Tumbler Nylon Roller


2 for $3.50
3 for $4.50
After years of use the nylon rollers on the idler shaft may wear down and need to be replaced. We offer a set of two rollers for the A-R1 and A-R6 tumblers and a set of three rollers for the A-R2 and A-R12 tumblers. Roller replacement is simple just remove the old rollers from the idler shaft and slide the new rollers into their place.
Rubber roller for Thumlers tumbler's drive shaft

Thumler's Rubber Roller


2 for $3.50
3 for $4.50
These rubber rollers for the drive shaft are what give the barrel traction and keep it turning to tumble the rocks inside. Replace worn rollers for optimum tumbling action. A set of two rubber rollers is needed for the A-R1 and A-R6 tumblers while a set of three rollers is needed for the A-R2 and A-R12 tumblers.
Thumler's AR2 and AR12 tumbler drive shaft

Thumler's A-R12 Drive Shaft


Only $16.99
A replacement drive shaft for the Thumlers A-R12 rotary tumbler. Easily replaced, just remove the belt, remove old shaft, snap the new one in and put the belt back on. Includes all parts: Shaft, bearings, rubber rollers, pulley and retainer rings.
Thumler's AR2 and AR12 tumbler idler shaft

Thumler's A-R12 Idler Shaft


Only $9.99
A replacement idler shaft for the Thumlers A-R12 rotary tumbler. This is a complete shaft with all parts included that can be replaced in a matter of seconds.
Thumler's 12lb barrel lid

Thumler's A-R12 Barrel Lid


Only $6.99
This plastic lid fits the Model A-R12 barrel and has a 12-pound tumbling capacity. Over time these plastic lids will wear through in the center so having an extra one on stand by is a good idea.
Thumler's 12lb barrel retainer clamp

Thumler's A-R12 Barrel Retaining Clamp


Only $6.99
This is a metal retaining clamp for Thumler's A-R12 Tumbler barrel that gives the barrel its watertight seal.
Thumler's 12lb tumbler barrel

Thumler's A-R12


Only $124.99
This large 12-pound capacity hexagon barrel was designed for Thumler's Model A-R12 rock tumbler. It is a complete barrel that includes the soft rubber barrel, plastic lid and sealing ring.

Barrel Dimensions in Inches
  Height Diameter
Inside (min) 7 3/8 5 3/4
Outside (max) 8 1/4 8 5/16

Thumlers A-R motor pully

A-R12 Tumbler Motor Pulley


Only $4.99
This pulley fits the motor on the A-R12 Thumler's Tumbler. This Thumler's A-R12 pulley has a 1/4" bore diameter and 3/4" outside diameter.
Thumlers tumbler motor

Thumler's A-R12 Tumbler Motor


Only $69.99
This Thumler's A-R12 rock tumbler motor is overload protected. It will automatically shut off under too much load. This motor is very easy to hook up and get back to tumbling.

Rock Tumbler Supplies
Fee mining collecting map
Rock tumbler grit Rock tumbler polish Rock tumbler rough Rock tumbling media Rock tumbler grit Rock tumbler rough Rock tumbling media Rock Tumbling Supplies