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

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 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 clips

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.
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.
Drive pulley for Thumler's drive shaft

Thumler's A-R2 Drive Pulley

Only $8.99
A replacement pulley for the drive shaft of your Thumler's A-R2 rotary tumbler. It can also be used on any of the following tumblers: Thumler's MP-1, A-R1, A-R6, A-R12, Model B, Model T, and Model T2.
Thumler's AR2 and AR12 tumbler drive shaft

Thumler's A-R2 Tumblers Drive Shaft

Only $19.99
A replacement drive shaft for the Thumler's A-R2 rotary tumbler. Easily replaced; just remove the belt, remove the 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 Thumler's 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 $38.99
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 the 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

Thumler's Model A-R2 metal base

Metal Base for Thumler's Model A-R2

Only $74.99
This is the metal base for your tumbler. There are two pairs of slots to hold drive and idler shafts. This is the base only, and does not include any other parts.
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. A 2mm allen wrench is needed to adjust or install pulley.
Thumlers tumbler motor

Thumler's A-R2 Tumbler Motor and Pulley

Only $119.99
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 9mm wrench is needed to intsall.
A-R2 rotary tumbler

A-R2 Rock Tumbler

MSRP $286.22
Our Price: $209.99

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

Thumler's Model A-R2 Rotary Tumbler Parts Diagram

A-R2 tumbler parts diagram
The above AR-2 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