מָבוֹא
The NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit is designed to transform ordinary rough rocks into beautifully polished gemstones. This advanced kit features a durable 2lb rubber barrel, precise speed control, and an automatic shutoff timer to achieve optimal polishing results. It offers an engaging and educational experience for users interested in geology and lapidary arts.

Image: Rough rocks before and after tumbling, showcasing the transformation into polished gemstones.
מה יש בקופסה
Your NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit includes the following components:
- Heavy-Duty Tumbling Machine: The main unit with built-in programmable timer and speed control.
- 2lb Leak-Proof Rubber Barrel: Designed for reduced noise during operation.
- 1lb Rough Gemstones: A selection of unpolished rocks to begin your tumbling process.
- 4 Bags of Polishing Grits: Coarse, medium, fine, and polish grits for a complete four-stagתהליך ה.
- חיבורי תכשיטים: Components to create custom jewelry from your polished stones.
- Rock Strainer: For separating grit from rocks between stages.
- Learning Guide and Instructions: A detailed guide to the tumbling process and geological information.

Image: All components of the kit, including the tumbler, barrel, rough gemstones, grits, jewelry fastenings, and learning guide.
הגדרה
- פרק רכיבים: הוציאו בזהירות את כל הפריטים מהאריזה וודאו שכל הרכיבים המפורטים קיימים.
- Place Tumbler: Position the tumbling machine on a stable, level surface. Ensure it is away from water sources and out of reach of small children.
- Prepare Barrel: Open the rubber barrel by unscrewing the knob and removing the metal and rubber lids.
- הוסף סלעים: Place your rough gemstones into the barrel. Fill the barrel approximately 1/2 to 2/3 full to allow sufficient space for tumbling.
- Add Grit: Refer to the instruction manual for the correct amount of coarse grit (Step 1) for the initial tumbling stage.
- הוסף מים: Fill the barrel with water until the rocks are just covered. Do not overfill.
- Seal Barrel: Securely place the rubber lid, then the metal lid, and tighten the knob to ensure a leak-proof seal.
- Place on Tumbler: Carefully place the sealed barrel onto the rollers of the tumbling machine.

Image: Visual guide for adding rocks, grit, and water to the tumbler barrel before sealing.
Video: Official National Geographic demonstration of the rock tumbler setup and initial operation.
הוראות הפעלה
The tumbling process involves four distinct stages, each using a different grit type and specific duration. Patience is key, as the entire process can take several weeks.
- הפעלה: Plug the tumbler into a power outlet. The digital display will illuminate.
- ימים מוגדרים: Use the '+' and '-' buttons under 'DAYS' to set the desired tumbling duration for the current grit stage. Refer to the manual's suggested tumbling times.
- הגדר מהירות: Use the '+' and '-' buttons under 'SPEED' to select the tumbling speed (1-3). Higher speeds are generally used for initial stages, lower for polishing.
- התחל לטבול: Press the 'Power' button to begin the tumbling cycle. The machine will run continuously until the set time elapses, then automatically shut off.
- Changing Grits: אחרי כל ס'tage, turn off the tumbler, remove the barrel, and carefully open it. Pour the contents (rocks and used grit/water) through the provided strainer into a designated outdoor area or a bucket. Never pour used grit down household drains, as it can cause severe clogs. Thoroughly rinse the rocks and the inside of the barrel to remove all traces of the previous grit before proceeding to the next stage.
- חזור על Stages: Follow the instructions for adding the next grit type (medium, fine, polish) and repeat the tumbling process for the recommended duration for each stage.
Video: Detailed instructions on how to operate the rock tumbler, including setting days and speed.
תַחזוּקָה
Proper maintenance ensures the longevity and optimal performance of your rock tumbler:
- ניקוי: Always clean the barrel and rocks thoroughly between each grit stage to prevent cross-contamination. Use a garden hose or a dedicated bucket for rinsing.
- בדיקת חגורה: Periodically check the durable tumbling belt for wear and tear. A spare belt is included in your kit for replacement if needed.
- אִחסוּן: When not in use, store the tumbler and its components in a clean, dry place.

Image: Close-up of the tumbler's durable components, including the leak-proof stainless steel lid and tumbling belt.
פתרון בעיות
If you encounter issues with your rock tumbler, refer to the following common problems and solutions:
- Tumbler Not Tumbling or Tumbling Intermittently:
- Ensure there is sufficient weight in the tumbling barrel. The barrel should be 1/2 to 2/3 full.
- Add more rocks or water to achieve the proper weight and allow for effective tumbling action.
- Check that the drive belt is properly seated and not worn out. Replace if necessary.
- פעולה חזקה:
- While the rubber barrel is designed for reduced noise, the tumbling of rocks will produce some sound. Consider placing the tumbler in a garage or utility room if noise is a concern.
- Ensure the barrel is properly sealed and seated on the rollers.
- Rocks Not Polishing as Expected:
- Ensure you are following the suggested tumbling times for each grit stage. Patience is crucial for optimal results.
- Thoroughly clean rocks and the barrel between grit stages to prevent coarser grit from contaminating finer stages.
- Consider using ceramic filler or plastic pellets with smaller batches of rocks to ensure proper tumbling action and prevent damage.
מפרטים
- מידות המוצר: 6.5 x 9.25 x 5.5 אינץ'
- משקל פריט: 5 פאונד
- מספר דגם של פריט: NGPROTUMBLER
- גיל מומלץ על ידי יצרן: 8 שנים ומעלה
- תאריך יציאה: 1 בינואר 2011
- יַצרָן: גלה עם ד"ר קול
מידע בטיחות
אזהרה: סכנת חנק - חלקים קטנים. לא מתאים לילדים מתחת לגיל 3.
אחריות ותמיכה
This premium tumbler comes with National Geographic’s 100% satisfaction guarantee and a 2-year warranty. For any inquiries or support, please contact us at help@thinkbluemarble.com.





