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Five black O-ring drive belts in a pack

RTumbler, LLC

RTumbler, LLC Replacement Drive Belt 5 Pack for Lortone 33B, 3-1.5, 45C Tumblers

SKU CH-9EQQ-632QH

Five-pack of Buna nitrile O-ring drive belts fits Lortone 33B, 3-1.5 and 45C tumblers, stays pliable to -20 °F and offers a 15-year shelf life

  • Product colorBlack
  • Product typeScience
  • Age groupAdult
  • Suitable forUnisex
  • Superior quality over original factory rubber belts
  • Buna nitrile O-ring construction resists abrasion better than natural rubber
  • Greater flexibility ensures smooth operation across temperatures
  • 15 year shelf life reduces replacement frequency
  • Remains pliable down to -20 F for cold environments

Replacement Drive Belt Pack

A five-pack of replacement drive belts designed for Lortone 33B, 3-1.5 and 45C tumblers. Each belt uses an O-ring style made from Buna nitrile rather than natural rubber. The material stays pliable down to minus 20 F and offers a 15 year shelf life. These belts suit owners who want durable spares on hand for regular tumbling sessions.

Hobbyists Who Need Reliable Spares

The nitrile construction gives greater flexibility and abrasion resistance than factory rubber belts, making the pack useful for adults running STEM-focused tumbling projects. Buyers who need belts for other tumbler models or different drive systems should look elsewhere, as compatibility is limited to the three Lortone models listed. The unisex, science-type classification means the product is not aimed at young children or general toy use.

Five-Belt Capacity and Material Headroom

Five belts provide enough replacements for extended use across multiple tumbling cycles without frequent reordering. The 15 year shelf life ensures spares remain viable even with infrequent operation. The material runs out of advantage only when a tumbler requires a non-O-ring profile or a different diameter than the 33B, 3-1.5 or 45C units specify.

How it compares

Measured against everything we stock in STEM Kits & Building Blocks, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 98% of the 236 comparable items (median $28.99).

Specifications

Product
Product colorBlack
Product typeScience
More details
Age groupAdult
Suitable forUnisex

Questions about this item

Which Lortone tumbler models will these belts fit?

They are compatible with Lortone 33B, 3-1.5 and 45C tumblers.

Will the Buna nitrile material handle the same loads as the original rubber belts?

The belts offer greater flexibility and abrasion resistance than natural rubber.

How can I verify the belts are still usable after long storage?

They retain pliability down to -20 F and have a 15 year shelf life.

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