The Mountain Goat Trommel is a reverse helix system built on the same principle as the huge mining trommels used by large mining companies all over the world, but this is light and portable.
The reverse helix system came from the Archimedes Screw Pump invented over 2,000 years ago by the mathematician Archimedes.
The Mountain Goat is efficient because the spiral riffles inside of the tube turn and bring the heavy materials up to the high end of the tube while allowing the lighter materials to flow out of the back of the tube as tailings. This system makes the trommel completely self-cleaning, which eliminates the need to break down for clean-up as is necessary with sluice box type equipment.The spiral riffles in the trommel tube are ¼ inch deep and spaced ¾ inch apart. We suggested your placer material be screened to ½ inch or less even though rocks as large as ¾ inch will pass through the tube. There is a nugget trap at the low end of the tube which should be checked regularly for nuggets larger than ¼ inch.
The front legs of the trommel are adjustable to increase the pitch but we found that the factory setting is the best for getting fine or flour gold. The factory setting has the front legs about 1 inch longer than the back legs. Tests have shown very little loss of fine gold at this setting when a wetting agent such as Jet Dry is used in the system.
The Mountain Goat can be used in a large tray, such a mortar mixing tub, with about 5 gallons of water which is then recirculated by a 750 gallon per hour pump. It can also be used directly in a stream.
The Mountain Goat Reverse Helix Trommel is the perfect companion to the Desert Fox Automatic Gold Panning Machine as it can directly feed the Desert Fox using the custom designed accessories making you an efficient small mining operation.
Height: 24 inches
Width: 16 inches
Length: 32 inches
Weight: 18 pounds
Barrel: 4 inches
Power Required: 12VDC 17AH
Water Required: 5 gallons
Pump Capacity: 750 Gph
Material Capacity: 2 Yards per Day
The Mountain Goat Trommel is a small version of the reverse helix trommels used by major placer mining companies. Do not confuse it with the gravel pit trommels which are screen type classifiers, not archimedes mining trommels. It can easily be carried up a mountain by one person.
The Mountain Goat can be used in a tub to recirculate the water to operate the machine. That way, the water stays free of leaves, etc. that can plug the pump. A sock slipped over the pump will also keep the spray system from clogging up. Any large tray such as a mortar mixing tub (found at most home improvement stores) can be used with 5 gallons of water which is then recirculated by the 750 gallon per hour pump.
The Trommel can also be used directly in a stream and is a very sturdy machine designed to take a lot of wear and tear!
The controls are conveniently located at the top of the trommel for easy operation.
The Mountain Goat can be set up to feed directly into the Desert Fox Gold Panning Machine to make you a one-man mining operation.
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Shipment / Transit time
Detector Experts makes every effort to get your order to you as soon as possible. Orders for in-stock items placed on business days before 3:00 PM ET (Eastern Time) are generally shipped the same day (subject to verification). Please note weekend orders, placed on Fridays after 1:00 PM ET will be processed on the following Monday. If there is a problem with your order, you will receive an e-mail within one business day to advise you about the situation.
Most orders get shipped the same day if received, processed and verified by 1:00 P.M. ET (Eastern Time) Monday – Friday. Orders received after these times or those which require verification (see below) will be processed the next business day.
Delivery of Oversize items:
Oversize items that are required to ship via truck due to their size or weight, generally take an extra day to ship. The average delivery time is 7-10 business days. Rural or remote delivery locations can sometimes take slightly longer.
All truck deliveries are made by appointment which must be scheduled in advance. The carrier will reach out to you by phone or email to set up this appointment. An adult must be available to receive, inspect, and sign for the merchandise at the time of delivery. A rescheduling fee may be applied for a missed delivery appointment, subject to carrier policy.
All deliveries are to the threshold of your location during standard business hours. White glove, inside delivery, evening, early morning, or weekend deliveries are sometimes able to be scheduled with the carrier for an additional cost. Detector Experts cannot guarantee the availability or cover the additional cost of these extra services.
Truck deliveries are unavailable to PO boxes, APO/FPO locations, or outside of the continental 48 states.
A signature is required for most shipments upon receipt. An adult must be at the address to receive the package and sign for it. Packages cannot be rerouted or picked up from UPS. If UPS is unable to successfully deliver your package they may bring your package to a UPS Access Point or they will re-attempt delivery up to 3 times, at their discretion.
If you require additional help to receive your package, please contact us.
Oversize items shipped by Truck are delivered by appointment which must be scheduled in advance. The carrier will reach out to you by phone or email to set up this appointment. An adult must be available to receive, inspect, and sign for the merchandise at the time of delivery. A rescheduling fee may be applied for a missed delivery appointment, subject to carrier policy.
All deliveries are to the threshold of your location during standard business hours Monday through Friday. White glove, inside delivery, evening, early morning, or weekend deliveries are sometimes able to be scheduled with the carrier for an additional cost. Detector Experts cannot guarantee the availability or cost of these extra services.
Damaged or missing items upon delivery
Damaged in delivery: If there is damage to the package, or if merchandise is missing, please keep the original shipping carton and contact us immediately so we can issue a damage claim with the carrier. Please don’t return the merchandise without going through these steps, as it delays the replacement of the order or the issuance of a credit.
Missing items: All missing items claims must be reported within five business days of delivery. Contact us to report a missing item from your shipment.
Oversize truck deliveries: Oversize items shipped by Truck are delivered by appointment which needs to be scheduled with carrier in advance. At time of delivery, an adult must be available to receive, inspect, and sign for the merchandise. Please inspect the item to be sure it is the correct model, in operable condition, and not damaged in any way. Do not sign the delivery manifest until you have inspected the item. Once the delivery manifest is signed, we are unable to file any damage claim with the carrier on your behalf. Once you sign for the item, you are accepting the product as is.
If the merchandise is damaged, please make a notation on the delivery manifest, and have the person delivering the merchandise sign as well. Contact us within 48 business hours to report the damage.
Yes, Detector Experts ships throughout the U.S., Canada and to over 200 countries worldwide where allowed by the Manufacturer. International shipments are subject to import fees, duties, and taxes (which are levied once a shipment reaches the destination country) in addition to the brokerage fees/custom clearance charges that may be imposed by the carrier. These charges must be borne by the recipient. Detector Experts has no control over these charges and cannot predict what they might be.
Due to high international shipping costs, taxes, and duty fees, we cannot ship any order that includes backordered items. We will hold the order until all items are in stock and available to ship. Please contact us if you wish to cancel or change these items.
If an international shipment is refused and/or returned, any taxes, duties, custom fees, brokerage fees, or shipping charges incurred from this return will be the responsibility of the customer.
Order transit times
Orders are generally delivered based on the shipping timeframe selected during checkout.
Please allow additional time for shipments to U.S. territories, P.O. boxes, or military APO/FPO addresses.
There are generally options that allow for expedited shipping that are displayed at checkout, at an additional cost, subject to terms and conditions of inventory etc…
Orders for in-stock items placed on business days are typically shipped the same day (subject to verification). Please note weekend orders, placed on Fridays after 1:00 PM ET will be processed on the following Monday.
Standard Shipping Options
- Super Saver (7-10 Business Days)
- Standard Shipping 3-7 Business Days
- UPS 3 Business Days
- UPS 2 Business Days Air
- UPS Next Business Day Air
- USPS Priority Mail
Expedited shipping is not available for shipments to, U.S. territories, P.O. boxes, or military APO/FPO addresses. Please allow additional time for orders shipped to these addresses.
Shipping to P.O. boxes or military APO/FPO addresses
Shipments can be sent to both P.O. boxes and military APO/FPO addresses. Note: Please allow 6-8 weeks for orders shipped to military APO/FPO addresses for them to be delivered.
Once an order has shipped out, we will send you an e-mail with the tracking number. Just click on the link and it will take you to the carrier’s website.
You can also track your order here
- Enter the Detector Experts Order number as well as the email address associated with the order. OR
- If you have a Detector Experts account, simply log into your account using your e-mail address and password, then click on your order number in your order history. The tracking number will appear under the Status & Tracking column. If you click on the link, it will take you to the tracking information for your order.
A signature is required for most shipments upon receipt. Someone must be at the address to receive the package and sign for it. Packages cannot be rerouted or picked up from UPS. If you require additional help to receive your package, please contact us.
What are the rules for transporting Hazardous Goods?
This item cannot be shipped outside the USA and must ship via Ground. Pursuant to terms as defined here
Some orders might be subject to our verification procedure before we can process it. For your protection from credit card fraud or identity theft, we may ask you to verify that you’re the card owner or that the order and the ship-to information are valid. If your order requires verification, you will be notified by email within one business day.