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Thumler's Model MP-1 Tumbler Parts

MP-1 Rock Tumbler
On this page you can find all of the commonly needed replacement parts for a Thumler's MP-1 rotary rock tumbler. To purchase a complete machine, visit our MP-1 tumbler page. At the bottom of this page we have an MP-1 parts diagram to help ensure you order the correct parts. Check out our MP-1 questions, answers and tips page to get the most out of your tumbler.
Rock Tumbler Supplies
Rock Tumbler Supplies
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Belt for Thumler's MP-1 tumbler

Thumler's MP-1 Belt

Only $5.99
Replacing the belt on a Thumler's MP-1 tumbler is an easy job that can be done without tools. Lift the drive shaft off of the frame, slip the belt over the pulley, replace the drive shaft and roll the belt over the motor pulley.
Thumler's MP-1 tumbler bearings

Thumler's MP-1 Bearings

Four for $6.99
Thumler's MP-1 bearings are simple to replace. Lift up the shaft, slide off the old bearings, and put on the new ones.
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 MP-1 Barrel Guides

2 for $3.99
Thumler's MP-1 two-pound 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.
Drive pulley for Thumler's drive shaft

Thumler's MP-1 Drive Pulley

Only $8.99
This pulley fits the drive shaft of the Thumler's MP-1 rotary tumbler. It can also be used on any of these other tumblers: Thumler's A-R1, A-R2, A-R6, A-R12, Model B, Model T, and Model T2.
Thumler's MP-1 drive shaft

Thumler's MP-1 Drive Shaft

Only $15.99
This is a complete drive shaft for Thumler's MP-1 rock tumbler. It comes with all rollers, drive pulley and new bearings.
Thumler's MP-1 idler shaft

Thumler's MP-1 Idler Shaft

Only $7.99
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.
Thumler's 2 lb barrel lid

Thumler's MP-1 Barrel lid

Only $5.99
This plastic barrel lid is for Thumler's MP-1 two-pound barrel. It also fits the three-pound barrels on Thumler's Models A-R1, A-R2, and Model T tumblers.
Thumler's 2 lb barrel retainer ring

Thumler's MP-1 Barrel Retaining Ring

Only $5.99
A rubber retaining ring used to secure the lid on a Thumler's MP-1 two-pound barrel. Also fits Models A-R1, A-R2 and Model T barrels.
Thumler's 2 lb tumbler barrel

Thumler's MP-1 Tumbler Barrel

Only $24.99
The Thumler's Model MP-1 rock tumbler barrel is a two pound capacity rubber barrel. This is a complete barrel so you don't need to buy any other barrel parts to use it. TIP: Getting a second barrel for the polishing stage is highly recommended to reduce the chance of larger grit contamination.

Barrel Dimensions in Inches
  Height Diameter
Inside (usable space) 2 5/8 4 1/4
Outside 3 5

Thumlers MP-1 tumbler motor

Thumler's MP-1 Tumbler Motor and Pulley

Only $49.99
This is the small light-duty motor that fits Thumler's MP-1 Rock Tumblers. It comes with the motor, pulley, and power cord.
Thumlers keps nuts

Thumler's MP-1 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 housing, one on each side of the opening where the motor's drive shaft protrudes. A 9mm wrench is needed to install.
MP-1 tumbler and supplies

MP-1 Tumbler and Supplies

MSRP $166.75
Our Price: $119.99

Tumbler and Supplies
This is a complete 2-pound rotary tumbler kit. It contains the tumbler plus enough grit, polish and rough to run one batch of stones. It also comes with jewelry findings to use with the finished stones. 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 MP-1 Rotary Tumbler Parts Diagram

MP-1 tumbler parts diagram
The above MP-1 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 (in housing), 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