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Thumler's Model A-R2 Tumbler Parts

A-R2 Rock Tumbler
Get replacement parts for your Thumler's A-R2 rotary tumbler on this page. If you need to purachase a complete tumbler visit our A-R2 tumbler page. An A-R2 parts diagram can be found at the bootom of this page to help you decide what part or parts you need. Check out our A-R2 questions, answers and tips learn the basics about operating your machine.
Rock Tumbler Supplies
Rock Tumbler Supplies
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Belt for Thumbler's tumblers

Thumler's Model A-R2 Belt

Only $6.99
Replacing a broken or worn out A-R2 belt is easy and no tools are required for the job. It is a good idea to have an extra belt lying around in case a belt breaks in the middle of tumbling a batch of rough.
Thumler's tumbler bearings

A-R2 Tumbler Bearings

Four for $7.99
Thumler's A-R2 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 one gets damaged.
Thumler's nylon guides

Thumler's A-R2 Barrel Guides

2 for $3.99
Thumler's A-R2 tumbler barrel guides are made of a durable nylon. You won't replace these often but when you do it is easy to do. 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 $3.99
3 for $4.99
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 $3.99
3 for $4.99
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-R2 Tumblers Drive Shaft

Only $19.99
A replacement drive shaft for the Thumlers A-R2 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, pulley, bearings, rubber rollers and retainer clips.
Thumler's AR2 and AR12 tumbler idler shaft

Thumler's A-R2 Idler Shaft

Only $14.99
A complete idler shaft for the Thumlers Model A-R2 rotary tumbler. This shaft has all of the necessary components and is fast and easy to replace.
Thumler's 3lb barrel lid

Thumler's A-R2 Barrel Lid

Only $5.99
This plastic barrel lid is for Thumler's A-R2 three-pound barrels. It also fits Models A-R1, MP-1 and Model T barrels.
Thumler's 3lb barrel retainer ring

Thumler's A-R2 Barrel Retaining Ring

Only $5.99
A rubber retaining ring used to secure the lid on a Thumler's A-R2 three-pound barrels. Also fits Models A-R1, MP-1 and Model-T barrels.
Thumler's 3lb tumbler barrel

Thumler's A-R2 Barrel

Only $37.99
This is a three-pound capacity barrel designed to fit Thumler's Model A-R2 rock tumbler. It is also the same barrel used on the Model A-R1, and Model T rock tumblers. It is a complete barrel with retaining ring and plastic lid. TIP: Purchasing an extra barrel for the polish step will reduce the chance of contamination from the larger grit steps.

Barrel Dimensions in Inches
  Height Diameter
Inside (usable space) 3 7/8 4 1/4
Outside 4 1/4 5

Thumlers A-R motor pully

A-R2 Tumbler Motor Pulley

Only $7.99
This pulley fits the motor on all A-R model Thumler's Tumbler. This Thumler's A-R2 pulley has a 1/4" bore diameter and 3/4" outside diameter.
Thumlers tumbler motor

Thumler's A-R2 Tumbler Motor and Pulley


This Thumler's A-R2 rock tumbler motor is thermally protected. It will automatically shut off if it gets too hot. This motor is very easy to attach and get back to tumbling.
Thumlers keps nuts

Thumler's A-R2 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-R2 rotary tumbler

A-R2 Rock Tumbler

We don't know when this tumbler will be available.
Thumler's A-R2 tumbler is a two barrel rotary rock tumbler. Each barrel will process about two pounds of rough material into beautiful polished gemstones. More Information

Rock Tumbler Supplies
Rock Tumbler Supplies
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Thumler's Model A-R2 Rotary Tumbler Parts Diagram

A-R2 tumbler parts diagram
The above MP-1 parts diagram has the components numbered to help you know what part or parts you need 1) Barrels, 2) Barrel Lids, 3) Barrel Retaining Rings, 4) Motor, 5) Motor Pulley, 6) Belt, 7) Drive Shaft, 8) Idler Shaft, 9) Bearings, 10) Rubber Rollers, 11) Nylon Rollers, 12) Barrel Guides, 13) Shaft Retainer Clips. Return to top