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Lortone 33B Rotary Tumbler vs Thumler's A-R2

Both are twin-barrel rotary tumblers built for rock polishing, and the choice comes down to capacity versus motor protection. The Lortone 33B gives you two 3 lb. barrels (6 lb. total) with an upgraded drive and needs periodic oiling. The Thumler's A-R2 gives you two barrels holding about 6 lb. total as well, but adds a fan-cooled, overload-protected motor and ships with a grit pack and 5 lb. of mixed rock. No current prices were supplied for either, so compare store prices on this page before buying.

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Lortone
Lortone 33B Rotary Tumbler

Lortone 33B Rotary Tumbler

Choose the Lortone 33B if you want a compact, proven twin-barrel tumbler with rubber barrels and an upgraded drive, and you don't mind oiling the bearings per the instructions.

Pros
  • Compact footprint fits on a small bench
  • Twin rubber barrels run together or one at a time
  • Upgraded drive over earlier models
Simple rotary design that beginners and experienced users both run
Cons
  • Requires oiling, which some owners forget
  • No overload protection stated for the motor
  • No grit or rock included, so budget for a grit kit
  • Smaller barrels mean smaller batches per load
Thumler's
Thumler's A-R2

Thumler's A-R2

Choose the Thumler's A-R2 if you want a fan-cooled, overload-protected motor and a starter kit with grit and rock included, and you value US-made build and continuous-duty operation.

Pros
  • Fan-cooled, overload-protected motor handles long runs
  • Ships with grit pack and 5 lb. of mixed rock to start tumbling
  • Rated for continuous operation
  • Made in the USA and used in labs and schools
Cons
  • Larger footprint takes more bench space
  • Barrels are smaller in diameter, so big stones won't fit
  • Rated 3.6/5 by the seller
  • 110V/60Hz only, so not for 220V outlets

What separates them

Lortone 33B Rotary TumblerThumler's A-R2
Barrel capacityTwin 3 lb. rubber barrels (6 lb. total)Two barrels, about 6 lb. of rock total; each interior 4 1/4" x 4"
Motor protectionUpgraded drive; no overload protection statedFan-cooled motor with overload protection
MaintenanceRequires oiling per instructionsNo oiling requirement stated
Included grit and rockBarrels only; no grit or rock statedGrit pack with pellets and 5 lb. mixed rock
Duty cycleNot statedContinuous operation
FootprintCompact: 6.25"W x 10.25"L base, 11" high16" x 13" x 5"
Country of originNot statedMade in the USA
Stated usesPolishing stones and gemstonesRocks, stones, coins, brass and metal cleaning

Price history

  • Lortone 33B Rotary Tumbler: lowest $218.00 on Oct 30 at Mama's Minerals.
  • Thumler's A-R2: lowest $182.00 on Nov 1 at eBay.

Prices at every store

Lortone 33B Rotary Tumbler

  • The Gemstone LabCheck price at The Gemstone Lab
  • LortoneCheck price at Lortone
  • Mama's MineralsCheck price at Mama's Minerals
Prices and history →

Thumler's A-R2

  • AmazonCheck price at Amazon
  • eBayCheck price at eBay
  • FindingKingCheck price at FindingKing
Prices and history →

Specs compared

SpecLortone 33B Rotary TumblerThumler's A-R2
TypeRotary tumblerRotary Rock Tumbler
Included MaterialsRocks, GemstonesGrit Pack with Pellets, 5lbs Mixed Rock
Included ComponentsTwin 3 lb. rubber barrelsTwo rubber tumbling barrels, One model A-R2 #11…
Included InstructionsYesYes, Instruction booklet "A Guide for Rock Poli…
Target UsersHobbyists, ProfessionalsSerious hobbyists, Beginners, Experts, Industry…
Interactive ElementsBarrels can be used simultaneously or individua…Rotary tumbler
DurabilityMolded Rubber Barrel’sOverload protected motor, Fan cooled motor
MaterialRubber (barrels)Rubber (tumbling barrels)
Power SourceElectricElectric (110V, 60Hz)
Skill LevelBeginner, Beginners, Experienced usersBeginner, Expert
Depth9.00 in101 mm (barrel interior)
Width6.25 in107 mm (barrel interior)
Show all 28 specsShow fewer specs
SpecLortone 33B Rotary TumblerThumler's A-R2
Weight20 lbs (dimensional shipping weight)6 lbs (per barrel)
Educational TopicsRocks and gemstones—
Age RangeAdult—
Height11.00 in—
Packaging TypeFrustration-Free Packaging—
Safety Features—Overload protected motor
Voltage—110V
Duty cycle—Continuous operation
Dimensions—16 in x 13 in x 5 in
Country of origin

What reviewers say

Lortone 33B Rotary Tumbler

Owners treat the 33B as a durable workhorse and often keep one running for years. The twin barrels and easy servicing draw the most praise; the oiling routine and slow rotary cycle draw the most complaints.

Pros
  • Long service life with basic maintenance
  • Twin barrels let two grit stages run at once
  • Rubber barrels hold up and run quieter than plastic
  • Straightforward to repair with common parts
Cons
  • Oiling schedule is easy to forget
  • Rotary tumbling is slow, often four to six weeks per load
  • Small barrel size limits how large a stone you can finish
  • Motor and drive noise bothers some owners in living spaces

Thumler's A-R2

Owners of Thumler's rotary tumblers generally describe them as sturdy, quiet workhorses that last for years with basic care. Common complaints center on the slow rotary process and the small barrel size.

Pros
  • Durable motor that runs for days without overheating
  • Quiet rubber barrels compared with plastic alternatives
  • Good results on small stones, coins, and brass
Cons
  • Slow; a full polish can take four to six weeks
  • Small barrels fill quickly with larger rocks
  • Lid seals need careful tightening to avoid leaks

Questions and answers

Which tumbler is better for a beginner?
The Thumler's A-R2 is the easier start because it includes grit and 5 lb. of rock, so you can begin tumbling the day it arrives. The Lortone 33B is also beginner-friendly but you must buy grit separately and remember to oil it.
Which one holds more rock?
They are close. The Lortone has two 3 lb. barrels, 6 lb. total. The Thumler's two barrels hold about 6 lb. of rock combined, but each barrel is only 4 1/4 inches across, so large stones won't fit.
Which motor lasts longer?
The Thumler's fan-cooled, overload-protected motor is built for continuous duty and is the safer bet for long unattended runs. The Lortone's upgraded drive is solid but has no stated overload protection and needs regular oiling.
Is the Thumler's worth extra money?
If prices are close, yes, because you get grit, rock, a protected motor and US-made build. If the Lortone is much cheaper and you already own grit, the 33B is a capable compact alternative.
Can either polish things other than rocks?
The Thumler's is explicitly sold for coins, brass and cleaning cartridge cases as well as rocks. The Lortone 33B is described for stones and gemstones; other uses aren't stated.
Do both run on standard US power?
The Thumler's runs 110V/60Hz. The Lortone is electric but its voltage isn't stated in the specs, so confirm it matches your outlet before ordering.

More comparisons

  • Thumler's Model B Rotary Tumbler vs Thumler's A-R2
  • Lortone 33B Rotary Tumbler vs Lortone 3A Rotary Tumbler
  • Lortone 3A Rotary Tumbler vs Thumler's A-R2
  • Tumble-Bee 2 x 2lb rock tumbler vs Thumler's A-R2

Buying guides that pick them

  • Best rock tumblers
—
USA
Power—110V / 60Hz
Barrel configuration—Double barrel
Tumbling method—Rotary
Barrel interior size—4 1/4" diameter x 4" deep (107 x 101 mm)
Motor—fan cooled motor and is overload protected
Motor voltage—115V