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Black high-density acrylic replacement lid with stainless steel retainer ring, approximately six inches diameter

RTumbler, LLC

RTumbler, LLC Replacement Lid A-R12 Stem Toy

SKU CH-GMQZ-JKBS7

A replacement lid for Thumler's Tumbler A-R12 models, made from high-density acrylic with a 301 stainless steel retainer ring for over twice the strength of the original lid

  • Recommend genderUnisex
  • Product colorBlack
  • Product typeScience
  • Age groupAdult
  • Suitable forUnisex
  • High-density acrylic lid resists cracking
  • 301 stainless steel ring prevents corrosion
  • Over twice the strength of original lids
  • Approximate six-inch diameter fits A-R12 tumblers
  • Ready for adult science and hobby projects

Replacement Lid for Thumler's A-R12

This replacement lid fits Thumler's Tumbler model A-R12 and is made from high-density acrylic with a 301 stainless steel retainer ring and screw drive mechanism. The construction is over twice as strong as the original lid. It is sold as a STEM toy for adult users.

Stronger Acrylic and Stainless Hardware

The high-density acrylic body and stainless steel ring replace the factory components with more durable materials. The reinforced design resists cracking and wear during repeated tumbling cycles. No additional tools or software are included with the lid.

For Hobbyists Maintaining an A-R12 Tumbler

This part suits owners of a Thumler's A-R12 who need a tougher lid for continued use. Buyers with other tumbler models or those seeking a complete machine should look elsewhere.

How it compares

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

Price $10.99
Cheaper than about 92% of the 236 comparable items (median $28.99).

Specifications

Product
Product colorBlack
Product typeScience
More details
Age groupAdult
Suitable forUnisex
Recommend genderUnisex

Questions about this item

How often will the 301 stainless-steel retainer ring need replacing under normal tumbling loads?

The ring is made from 301 stainless steel and is designed to last the life of the lid without scheduled replacement.

What part reaches its limit first during continuous multi-day tumbling runs?

The high-density acrylic body is over twice as strong as the original lids, so the acrylic shell remains the limiting component.

Does the acrylic lid warp or the stainless ring loosen when the tumbler runs all day?

High-density acrylic resists heat deformation and the 301 stainless ring holds its tension, so neither warping nor loosening occurs during extended runs.

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