Rock Tumbler Parts
Get the parts you need to get your tumbler running!
Shop by Part Needed
Belts
Thumler's Model-T & MP-1 Belt
Thumler's MP-1 and Model-T tumbler belt can be changed quickly and easily without using tools. Lift the drive shaft, slip the belt over the pulley, replace the drive shaft and roll the belt over the motor pulley.
Belt for Thumler's A-R Models and Model B
This belt is simple to replace and works on all of Thumler's A-R tumblers and the 15-pound Model B tumbler.
Bearings
Thumler's MP-1 Bearings
These bearings fit the Thumler's MP-1 rock tumbler and are simple to replace. Lift up the shaft, slide off the old bearings, slide on the new ones. No tools needed.
Thumler's Tumbler Bearings
Bearings for Thumler's A-R1, A-R2, A-R12 and Model B tumblers. Simple to replace: just remove the retainer clip from the end of the shaft, remove the old bearing, slide on a new bearing, replace the retainer clip.
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. Just one drop on each bearing. See our article for detailed instructions.
Needle-Tip Oil Bottle
Have your own SAE20 motor oil or general purpose oil? Get a needle-tip bottle to accurately dispense it on tumbler bearings and motors. Keep your tumbler running smooth, clean and quiet!
Shafts
Thumler's MP-1 Drive Shaft
This is a complete drive shaft for Thumler's MP-1 rock tumbler. It comes with all rollers, drive pulley and new bearings. Easy to replace.
Thumler's MP-1 Idler Shaft
This is a complete idler shaft for Thumler's MP-1 rock tumbler. It comes with all rollers, barrel guides, retainer clips and new bearings. Easy to replace.
Thumler's A-R1 and A-R6 Tumblers Drive Shaft
A replacement drive shaft for the Thumler's Model T, A-R1 and A-R6 rotary tumblers. Easy to replace: just remove the belt, lift out the old shaft, snap the new one in place and replace the belt. Includes: shaft, rubber rollers, bearings, pulley, retainer clips.
Thumler's A-R1 and A-R6 Tumblers Idler Shaft
A replacement idler shaft for the Thumler's Model T, A-R1 and A-R6 rotary tumblers. Easy to replace: just lift out the old shaft, snap the new one in place and you are finished. Includes: shaft, nylon rollers, bearings, barrel guides and retainer clips.
Thumler's A-R2 and A-R12 Tumblers Drive Shaft
A replacement drive shaft for the Thumler's A-R2 and A-R12 rotary tumblers. Easy to replace: just remove the belt, lift out the old shaft, snap the new one in place, replace the belt. Includes: shaft, rubber rollers, bearings, pulley and retainer clips.
Thumler's A-R2 and A-R12 Tumblers Idler Shaft
A replacement idler shaft for the Thumler's A-R2 and A-R12 rotary tumblers. Easy to replace: just lift out the old shaft, snap the new one in place and you are finished. Includes: shaft, nylon rollers, bearings, barrel guides and retainer clips.
Thumler's Model B Tumbler Drive Shaft
A replacement drive shaft for the Thumler's Model B rotary tumbler. Easy to replace: just remove the belt, lift out the old shaft, snap the new one in place and replace the belt. Includes: shaft, rubber rollers, bearings, pulley and retainer clips.
Thumler's Model B Tumbler Idler Shaft
A replacement idler shaft for the Thumler's Model B rotary tumbler. Easy to replace, just lift out the old shaft, snap the new one in place and you are finished. Includes: shaft, rubber rollers, bearings, barrel guides and retainer clips.
Shaft Parts
Thumler's Drive Pulley
This pulley fits the drive shaft of Thumler's rotary tumblers. It can be used on any of the following tumblers: Thumler's MP-1, A-R1, A-R2, A-R6, A-R12, Model B, Model T, and Model T2.
Thumler's Tumbler Nylon Roller
After years of use, the nylon rollers on the idler shaft can wear out 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
Rubber rollers on the drive shaft give the barrel traction and keep it turning. Replace worn rollers for optimum tumbling action. The A-R1 and A-R6 tumblers need two rollers, while the A-R2 and A-R12 require three rollers.
Thumler's Barrel Guides
Barrel guides are easy to replace: just remove the retainer clip from the end of the shaft, remove the bearing and guide, slide on a new guide and replace the bearing and retainer clips.
Model B Tumbler Barrel Guides
Model B barrel guides are made of polyethylene and are simple to replace: just remove the retainer clip from the end of the shaft, remove the bearing, rubber roller and then the old guide. Slide on a new guide and replace the rubber roller, bearing and retainer clips.
Thumler's Shaft Retainer Clips
Retainer clips are used to hold the bearings and nylon rollers in their proper position location on drive and idler shafts. Keep a couple extra clips on-hand when working on drive/idler shafts.
Barrel Parts
Thumler's Small Barrel Lid
This is the plastic lid that covers the Thumler's Tumbler three-pound and two-pound barrels. Fits Models A-R1, A-R2, MP-1 and Model T barrels.
Thumler's 3-Pound Barrel Retaining Ring
This is the rubber retaining ring that is used to secure the lid on Thumler's Tumbler three-pound and two-pound barrels. Fits Models A-R1, A-R2, Model T and MP-1 barrels.
Thumler's 9-Pound Barrel Lid
This is the plastic lid that covers a Thumler's Tumbler nine-pound barrel. Fits the Model A-R6 barrel.
Thumler's 9-Pound Barrel Retaining Ring
This retaining ring is used to secure the lid on a Model A-R6 barrel. A new ring will appear much smaller than the one that you're replacing! That's because it hasn't been stretched. Please watch this video to learn how to place it on the barrel.
Thumler's 12-Pound Barrel Lid
This is the plastic lid that covers a Thumler's Tumbler twelve-pound barrel. Fits the Model A-R12 barrel.
Thumler's 12-Pound Barrel Metal Retaining Clamp
This is the metal retaining clamp that is used to secure the lid on a Thumler's Tumbler twelve-pound barrel. Fits the Model A-R12 barrel. An 8mm wrench is needed to install.
Thumler's Model B Barrel Lid
This is the metal lid that covers a Thumler's Tumbler fifteen-pound barrel. Fits the Model B barrel.
Thumler's Model B Barrel Gasket
This is the gasket that goes under the metal lid on the Thumler's fifteen-pound Model B tumbler barrel.
Diameter = 9"
Hole center to hole center = 8"
Hole diameter = 9/32"
Thumler's Model B Barrel Liner and Gasket
This thick soft rubber liner and gasket for Thumler's Model B barrel give it a watertight seal and reduces the noise during tumbling. The liner is eight inches deep.
Thumler's Model B Barrel wing nuts
A set of 6 wing nuts to tighten the lid on Thumler's fifteen-pound Model B barrel.
Thumler's Model B Barrel Washers
A set of 6 washers for under the wing nuts on Thumler's fifteen-pound Model B barrel.
Plastic Cap For the Lot-O-Tumbler Barrel
This is the red cap that goes on top of the Lot-O-Tumbler barrels.
Other Parts
A-R Tumblers Motor Pulley
This pulley fits the motor on all A-R model Thumler's Tumbler. The Thumler's A-R pulley has a 1/4" bore diameter and 3/4" outside diameter. A 2mm allen wrench is needed to adjust or install pulley.
Model B Motor Pulley
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.
Thumler's Motor Mounting Nuts
Two keps nuts (nuts with attached, free spinning, star-shaped lock washers) are used to keep the motor in place. For Thumler's Model MP-1, Model T, and Model T2: The nuts screw onto the two motor-mounting bolts where they extend through the motor housing, one on each side of the opening where the motor's drive shaft protrudes. For Thumler's Models A-R1, A-R2, A-R6, A-R12, and Model B: The nuts screw onto the two motor-mounting bolts where they extend through the motor-mounting brackets. A 9mm wrench is needed to install.
Thumler's UV-10 Feet and Bolts
A set of 3 replacement feet and bolts for Thumler's UV-10 vibratory rock tumbler.
Thumler's UV-10 Lid / Bowl Washer
This washer with a soft rubber pad can be used on either the bowl or the lid. This price is for one washer.
Thumler's UV-10 Base Foam Pad
A replacement foam pad that sticks to the machine underneath the barrel.
Thumler's UV-10 Barrel Lid Foam Pad
A replacement foam pad that sticks to the bottom of the barrel's lid.
UV-10 Wing Nut for Threaded Center Post
This wing nut fits the center post on Thumler's UV-10 vibratory tumbler. It works for both holding the bowl down or the lid.
UV-10 Threaded Center Post
This replacement center post is for Thumler's UV-10 vibratory tumbler. It comes with both the locknut for under the plate and the regular nut for above the plate. A 11mm wrench is needed to install.
Thumler's UV-18 Lid Washer
This is the smaller of the two washers on a Thumler's UV-18. It comes with a rubber pad attached and is used to hold the lid down to the bowl.
Thumler's UV-18 Bowl Washer
This is the larger of the two washers on a Thumler's UV-18. It comes with a rubber pad attached and is used to hold the bowl down to the plate.
Thumler's UV-18 Bowl Lid Foam Pad
A replacement foam pad that sticks to the bottom of the bowl's lid.
Thumler's UV-18 Foam Base Pad
A replacement foam pad that sticks to the machine underneath the bowl.
UV-18 Wing Nut for Threaded Center Post
This wing nut holds the lid on Thumler's UV-18 vibratory tumbler bowl.
UV-18 Bowl Nut and Star Washer
This bowl nut and star washer are used to hold the bowl down. The large padded washer that goes underneath these is sold separately above. A 14mm wrench is needed to install.
Lot-O-Tumbler Replacement Springs
Replacement springs for the Lot-O-Tumbler are sold in sets of six. The Lot-O Single has six springs (four in the back and two in the front). The Lot-O Twin has twelve springs (eight in the back and four in the front). You will need two sets if you are going to replace all of the springs on a Twin.
Lot-O-Tumbler Motor Fans
Replacement fans are sold in pairs and have the counterweights mounted within the fan. When you replace a pair of fans, be sure that the counterweights are in matching positions on each side of the machine. Fans fit the Lot-O-Tumbler Single and Twin.
