Thumler's Model A-R1 Belt
Replacing a worn out A-R1 belt is one of the easiest fixes on the tumbler. No tools are required. Just slip the belt off of the large pulley on the drive shaft, lift the drive shaft out of its slot, and remove the belt.
Please note: If you have one tumbler, there is no need to purchase several belts. These belts last us an average of several years EACH. Learn why.
Model A-R1 Tumbler Bearings
Thumler's A-R1 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.
Stop Squeaky Bearings
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
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 A-R1 Barrel Guides
Thumler's A-R1 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 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 Tumbler Nylon Roller
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.
Thumler's Rubber Roller
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 A-R1 Drive Pulley
This pulley fits the drive shaft of the Thumler's A-R1 tumbler. It can also be used on any of the following rotary tumblers: Thumler's MP-1, A-R2, A-R6, A-R12, Model B, Model T, and Model T2.
Thumler's A-R1 Drive Shaft
A replacement drive shaft for the A-R1 rotary tumbler. Easy to replace, just remove the belt, lift out the old shaft, snap the new one in and replace the belt. Includes: Shaft, rubber rollers, bearings, pulley and retainer clips.
Thumler's A-R1 Idler Shaft
A complete idler shaft for the Thumler's A-R1 rotary tumbler. Easy to replace, Lift out the old shaft and snap the new one in. Includes: Shaft, rollers, barrel guides, bearings, and retainer clips.
Thumler's A-R1 Barrel lid
This plastic barrel lid is for Thumler's A-R1 three-pound barrel. It also fits A-R2, MP-1 and Model T barrels.
Thumler's A-R1 Barrel Retaining Ring
A rubber retaining ring used to secure the lid on a Thumler's A-R1 three-pound barrel. Also fits A-R2, MP-1 and Model-T barrels.
Thumler's A-R1 Barrel
This is a three-pound capacity barrel designed to fit Thumler's Model A-R1 rock tumbler. It is also the same barrel used on the Model A-R2, and Model T rock tumblers. It is a complete barrel with the retaining ring and plastic lid. TIP: An extra barrel dedicated to the polishing step significantly reduces the possibility of grit contamination.
| Barrel Dimensions in Inches |
| |
Height |
Diameter |
| Inside (usable space) |
3 7/8 |
4 1/4 |
| Outside |
4 1/4 |
5 |
Metal Base for Thumler's Model A-R1
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.
A-R1 Tumbler Motor Pulley
This pulley fits the motor on all A-R model Thumler's Tumblers. This Thumler's A-R1 pulley has a 1/4" bore diameter and 3/4" outside diameter. A 2mm allen wrench is needed to adjust or install pulley.
Thumler's A-R1 Tumbler Motor and Pulley
This Thumler's A-R1 rock tumbler motor is thermally protected. It will automatically shut off if it gets too hot. This motor is very easy to attach.
Thumler's A-R1 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. A 9mm wrench is needed to install.
A-R1 Tumbler and Supplies
A 3-pound rotary tumbler kit that comes with all of the grit, polish and rough needed to tumble-polish the first batch of stones. It also comes with jewelry findings to make necklaces and pendants out of the finished stones. More Information
Thumler's Model A-R1 Rotary Tumbler Parts Diagram
The above A-R1 parts diagram has the components numbered to help you know what part or parts you need. 1) Barrel, 2) Barrel Lid, 3) Barrel Retaining Ring, 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.
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