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Ten black rubber O-ring drive belts in a clear bag

RTumbler, LLC

RTumbler, LLC Replacement Drive Belt 10 Pack

SKU CH-X31B-CA4QS

A 10-pack of Buna nitrile O-ring drive belts with 15-year shelf life and flexibility down to -20 F for 3 lb rock tumblers

  • Product typeScience
  • Age groupAdult
  • Suitable forUnisex
  • Superior quality over original factory rubber belts
  • O" ring style made from Buna nitrile material
  • Greater flexibility and abrasion resistance than natural rubber
  • 15 year shelf life for long-term storage
  • Stays pliable down to -20 F for cold environments

Replacement Drive Belt 10 Pack

This set contains ten replacement drive belts made for Chicago Electric Harbor Freight 3 lb single and double barrel rock tumblers. The belts use a Buna nitrile O-ring design instead of natural rubber. They are intended for adult hobbyists who operate these specific tumblers. The pack restores operation when the original belt wears out.

Buna Nitrile Material and Build

Buna nitrile gives the belts greater flexibility and abrasion resistance than the factory rubber belts. The material stays pliable down to -20 F, so the tumbler can run in cold garages or basements. A 15 year shelf life means spares remain usable for future maintenance. The O-ring style fits the motor pulley and drive shaft without modification.

Ten Pack Quantity for Long Term Use

The package supplies ten belts, covering multiple replacements over the life of the machine. This quantity suits owners who run their tumblers frequently and want spares on hand. Buyers who need belts for a different brand or barrel size should verify compatibility before ordering.

How it compares

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

Price $14.99
Cheaper than about 77% of the 236 comparable items (median $28.99).

Specifications

Product
Product typeScience
More details
Age groupAdult
Suitable forUnisex

Questions about this item

What material are the O-ring style belts made from?

The belts are made from Buna nitrile, which provides greater flexibility and abrasion resistance compared to natural rubber.

What tumbler models do these 10 replacement belts fit?

They fit Harbor Freight and some generic clone 3 lb single and double barrel rock tumblers.

How should the spare belts be stored to maintain their 15 year shelf life?

Store them at room temperature; the Buna nitrile material stays pliable down to -20 F and resists drying out over time.

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