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Covington Engineering

Covington 4 Station Expandable Drum Unit

Covington 4 Station Expandable Drum Unit


Regular price
Price: $1,995.00
Regular price
List Price:
Sale price
Price: $1,995.00
Why Buy From Lapidary Mart

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Free shipping offers (where indicated) apply to orders with a shipping address in the lower 48 states only. 

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If a product doesn't have a Free Shipping label, then shipping will be charged at checkout. A handling charge of $5 to $15, depending on the products and the amount of the order, is included.

Please note that our shipping software isn't always accurate, especially when ordering multiples of the same item or very heavy items. If you are overcharged for shipping, we will issue you a refund for the difference. If you are undercharged, then you got a great deal!

International Orders

We do not ship internationally.

Order Confirmation

As soon as you place your order, you will receive an order confirmation email. This means that we have received your order in our system and pre-authorized your credit card for the purchase. When we receive your order, we reach out to our suppliers to confirm that it is available for shipment within the specified time frame.

If your item is on back-order or unavailable, we will reach out to you via email or phone and void the pre-authorization if you so desire. If your item(s) are available for shipment, we will process the charges and submit the order for shipment.

Order Shipment

If your order is in stock and we process the charges to your credit card, it will ship within the following time frame according to brand, from the date of your order:

Lightning Lap: 1-2 business days
Crystalite: 2-5 business days
Gemini: 5-15 business days
Covington Engineering: 1-5 business days
CabKing, Hi-Tech Diamond, Inland and Tumble-Bee: 1-5 business days

Please keep in mind that processing times may be a little longer during holiday periods. Shipments can also be delayed due to supply-chain issues with our manufacturers. We will inform you if there is any significant delay expected.

We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at


Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please send photos to and we will process an insurance claim on your behalf.

Covington 4 Station
Expandable Drum Unit

The Covington 4 Station Expandable Drum Unit is the perfect tool for sanding, polishing, and finishing a wide range of materials. The drum surface flexes to the contours of the gemstone, quickly removing grinding flats and scratches.

Included with the machine are four 3" x 8" sanding belts (1 each, 100 grit, 220 grit, 400 grit & 600 grit), which give a range of sanding options for various types of projects.

The unit also features a belt guard and instructions for safe and effective use. The manufacturer's warranty ensures that your investment is protected, and the four 8" x 3" expandable drums make it easy to switch between sanding belts as needed.

The heavy-duty ball bearings are neoprene sealed and greased for life, ensuring smooth and efficient operation over an extended period. The powder-coated cast aluminum arbor and pans with drain plugs are built to last, while the hoods are easy to remove for cleaning or wheel changes.

The water valve takes 1/4" OD plastic tubing for gravity water flow or 1/4" copper tubing for pressure systems. Spray nozzles under the hood wet the entire wheel face.

The speed control allows gradual speed changes from 800 rpm to 1725 rpm, giving you complete control over your sanding and finishing processes. The 1/2 hp, high torque motor provides ample power to tackle even the toughest jobs with ease.

Whether you are a professional lapidary or hobbyist, the Covington 4 Station Expandable Drum Unit is a versatile and reliable tool that will help you achieve perfect results every time. With its durable construction, flexible sanding options, and easy-to-use features, this unit is a must-have for anyone serious about their craft.


  • Four 8" x 3" Expandable Drums
  • Four 3" x 8" sanding belts (1 each, 100 grit, 220 grit, 400 grit & 600 grit)
  • Belt guard
  • Instructions
  • Manufacturer's warranty
  • Heavy Duty Ball Bearings, Neoprene Sealed and Greased for Life
  • Powder Coated Cast Aluminum Arbor
  • Pans with Drain Plugs
  • Hoods with Water Valves
  • Speed Control Allows Gradual Speed Changes from 800 rpm to 1725 rpm
  • 1/2 hp, High Torque Motor
  • Mounted on a rustproof aluminum-topped Lam-I-Cushion base.
  • FREE Shipping!


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