What is the power consumption of this unit over a week of continuous use? (in usa on 110v). thank you.

This takes .3 Amps, so (watts = amps x volts) OR watts = .3 x 110 which equals33 watts. Now for one week would equal 33 watts x 7 days x 24 hours =5544 watts or 5.54 kilowatts for one week.At $.16 per kilowatt it comes to $.89 per week.

What the difference between this and the starter kit?

There are two main differences:The Hobby Rock Tumbler has a rubber tumbling barrel with a stainless steel cap, which reduces noise and is more durable. The Starter Kit Rock Tumbler has a plastic barrel. The Hobby Rock Tumbler also has a keypad for setting the number of days you would like it to tumble, where as the Starter Kit Rock Tumbler's setting options are on/off. Thank you for your inquiry.

What pound tumbler is this product?

Dearest National Geographic.... why would you only send 1# of rocks with a two pound tumbler?

Can i buy extra grit without the rocks. we have many rocks from "mining" gemstones that i would love to polish. what do you recommend?

I recommend you follow the rock tumbler hobbiest MIchigan Rocks on Youtube. He's a good wealth of information for anyone getting into rock tumblers. He and other's mention that the polish from National Geographic is not good. I would go with rock tumbler polish offered by Polly Plastics.

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National Geographic Hobby Rock Tumbler Kit NGHOBBYTUMBLER

National Geographic Hobby Rock Tumbler Kit NGHOBBYTUMBLER

Product ID: 736143246

Details

Age Range (Description)
Kid
Brand
Blue Marble
Item dimensions L x W x H
35.1 x 12.4 x
Size
ワンサイズ
Theme
Rock Tumbling

🔇Noise-reducing, leak-proof stainless steel barrel

⏲️Automatic shut-off timer for safe use

⚙️Powerful motor for smooth tumbling

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VT56960

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Turn rough stones into dazzling treasures — polish your passion with National Geographic!

STEM APPROVED FUN - Educational guide and hands-on experience make this perfect for curious minds and creative pros alike.
SAFE SMART OPERATION - Automatic shut-off timer protects your tumbler and gemstones from over-processing.
WHISPER QUIET CRAFTING - Noise-reducing, leak-proof barrel with stainless steel lid lets you enjoy your hobby without distractions.
ALL INCLUSIVE STARTER KIT - Includes 9 gemstone varieties, 4 grit grades, and jewelry fasteners to create stunning custom pieces.
EFFORTLESS GEMSTONE POLISHING - Powerful motor ensures consistent, professional-grade results every time.

The National Geographic Hobby Rock Tumbler Kit is a high-quality, durable rock polishing machine featuring a powerful motor, automatic shut-off timer, and a noise-reducing stainless steel barrel. It comes complete with half a pound of nine different gemstones, four grades of grit, jewelry fasteners, and an educational guide, making it an ideal STEM-focused hobby kit for both beginners and enthusiasts eager to craft beautiful polished stones and jewelry.

Specifications

ASIN	B01LQCIL88
Age Range Description	Kid
Amazon Bestseller	#148,089 in Toys & Games ( See Top 100 in Toys & Games ) #158 in Earth Sciences & Geology Science Kits
Brand Name	Blue Marble
Customer Reviews	4.5 4.5 out of 5 stars (24,800)
Educational Objective	STEM
Global Trade Identification Number	00816448020421
Is Assembly Required	No
Item Dimensions	35.1 x 12.4 x 20.5 cm
Item Weight	2.3 kg
Manufacturer Part Number	NGHOBBYTUMBLER
Material Type	Stainless Steel
Model Number	NGHOBBYTUMBLER
Size	ワンサイズ
Sub Brand	National Geographic
Theme	Rock Tumbling
UPC	816448020421
Unit Count	1.00 Count

Reviews

安**夫

2021年7月に購入しましたが2か月も経たずにモーターが回転しなくなりました。色々なサイトでレビューを見ましたが異口同音使って間もなくモーターが回らなくなったという不満が多数見られます。消耗品として割り切るには高価すぎます。モーターが停止した時（故障）にリカバリーする方法があれば教えてください。追伸遂にリカバリーレビュウ（USA)を見つけましたのでご参考までに紹介します。ダウンしたモーターを以下モーターに交換したら正常に運転出来るようになったそうで早速amazon usaに発注しました。本体価格：２１．４９＄、送料：５．９９＄、合計：２７．４８＄（日本円：3,069円）モーター仕様：UXセルモーター15.8V,2900RPM,電流０．０９A レビュウに出ているULRをクリックするとamazon usaに発注サイトが表示されるので便利です。輸送は船便なので10月～11月と表示されました。リカバリー出来ましたらまた投稿します。評価が高いのは子供用で現地では安価に購入出来て同梱されている原石の研磨には充分使用に耐えるのでコスパが高いという評価と思います。大人が長期に使用するには向かない商品です。修理結果報告 amazon usa のサイトに注文したモーターが予定より早く届き早速モーターを交換しました。モーター取り付け位置は同じ、モーターシャフト径は同じ3.2ミリでしたがそのシャフトに7.5ミリのブッシュがはめ込んであり旧モーターから外したプーリー内径は3.2ミリのためそのままでは取りつきません。このことは私が見た投稿にも述べられていました。ブッシュを抜こうと試みましたが固くてぬけませんでしたのでプーリーの内径を7.5ミリに加工しました。内径を7.5ミリに拡大するときに曲げて加工してしまい新たにプーリーを日本で購入することになりました。（ものたろうで購入）加工には要注意。新たに購入したモーターの配線は短く使えないのでＲＯＣＫＴＵＭＢＬＥＲについている配線を半田付けしました。新たに購入したモーターも中国製なので寿命はオリジナルのモーターと同じかもしれませんがこの交換作業で修理は完了しました。今後は連続使用を極力さけて大事に使うようにしたいと思っています。

18.09.2021

D**I

Excellent product and 100% results producer but now a days this product buy on Amazon is totally foolish idea because very very expensive compared to original cost in USA. Dear buyers don't buy this product.

28.03.2019

V**Z

Sirve muy bien, sólo que es bastante ruidoso, y como tiene que estar prendido por días, llega a ser molesto

18.03.2024

M**S

conforme à la description,notice claire et bien détaillée. Silencieux ! Rien à redire.

12.08.2019

V**E

great value and product

15.12.2025

A**I

تصقل وتلمع

8.10.2023

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