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Covington Felt Cone for Polishing Curved Glass

Covington Felt Cone for Polishing Curved Glass

by Covington Engineering
$139.99

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Achieve a flawless, high-gloss finish on curved glass surfaces with this precision-crafted felt cone for lapidary flat laps. Designed specifically for polishing the inside contours of glassware and bottles, this cone delivers smooth, consistent results where flat tools fall short.

Measuring approximately 3 inches in both base diameter and height, the cone provides an ideal shape for accessing tight curves while maintaining excellent control. Each cone is fitted with a durable 5/8"-11 threaded brass adapter, ensuring secure compatibility with Covington Flat Lap machines for easy setup and reliable performance.

When paired with cerium oxide, this felt cone excels at producing an optically clear, professional-grade polish on glass surfaces. Whether you're refining artistic pieces or restoring clarity to functional glassware, this tool is a dependable addition to any lapidary setup.

Key Features:

  • Perfect for polishing interior curves of glassware and bottles
  • Approx. 3" base diameter × 3" height
  • Includes 5/8"-11 threaded brass adapter
  • Compatible with Covington Flat Lap series
  • Ideal for use with cerium oxide for crystal-clear finishes

A must-have for lapidary artists seeking precision and brilliance in their glass polishing work.

Let customers speak for us

from 56 reviews
Lortone 33B Rock Tumbler
Terry H.
Product works as advertised

Product works as advertised, we love the results. Communication and delivery was great.

Lortone 33B Rock Tumbler
Lortone 33B Rock Tumbler
Anonymous
2 thumbs

2 thumbs up

Lortone 33B Rock Tumbler
Raytech Tumble-Vibe TV-10 Vibratory Tumbler
RickyB
Good tumbler for the price

The tumbler was a little slow being delivered, but after my first full polish cycle, I'm pretty pleased with the results. Some rocks didn't finish the way I'd hoped, but it is more likely that inconsistent rock shapes and cavities.

Raytech Tumble-Vibe TV-10 Vibratory Tumbler
Raytech Tumble-Vibe TV-10 Vibratory Tumbler
Brian F.
Sweet

Sweet

Raytech Tumble-Vibe TV-10 Vibratory Tumbler
Hi-Tech Diamond Saw Fence for 6"/10" Diamond Saw
Joanne K.
Exactly what I needed

Exactly what I needed. Works great.

Hi-Tech Diamond Saw Fence for 6"/10" Diamond Saw
Thumler's Tumbler 4-step Grit & Polish Kit ( AR12 & Model B)
William S.
Shortcut that's the perfect

Shortcut that's the perfect amount

Thumler's Tumbler 4-step Grit & Polish Kit ( AR12 & Model B)
Thumler's Tumblers Rotary Tumbler Model B
William S.
A Tank

Huge and well crafted

Thumler's Tumblers Rotary Tumbler Model B
William S.
Awesome

Awesome

The Gemstone Lab
Inland Craft DB-100 Diamond Band Saw
William S.
Precise

Precise

Inland Craft DB-100 Diamond Band Saw
Lortone 33B Rock Tumbler
Fern S.
So much better than my previous tumbler!

I had been gifted a cheap knock-off version of the 33B, which failed badly after about a month of us. The 33B jumped right in where that one left off, and has had no problems. It is clearly a much more sturdily made product. Based on the overwhelmingly positive interweb discussions, I hope to have years of use from this tumbler!

Lortone 33B Rock Tumbler
Covington Stage 1 Tumbling Grit 60/90
Stewart B.
grit seemed fine

The grit seemem to work fine it did arrive faster than the tumbler did and I was glad for that.

Covington Stage 1 Tumbling Grit 60/90
Tumble Bee Rotary Rock Tumbler 2x2 TB-22
Alex L.
Great

Great tumbler

Tumble Bee Rotary Rock Tumbler 2x2 TB-22
Lortone 33B Rock Tumbler
AC
This tumbler had literally no set up needed

This tumbler had literally no set up needed. Getting the tumbler up and running was simple and the directions are easy to follow. Tumbler phase 1 and 2 without issue. Excited to continue to polish and tumble with this tumbler!

Lortone 33B Rock Tumbler
Raytech Tumble-Vibe TV-10 Vibratory Tumbler
Stewart B.
Great machine

In years past I used a QT12 tumbler and made some amazing stones shine, this is my first time using a vibrating machine and am on my first batch. Everything seems great. I really like the fact that I can actually see the stones working and can adjust what goes in the bowl. This first batch should be beautiful. Thanks

Raytech Tumble-Vibe TV-10 Vibratory Tumbler
AC
Great Company

Order online was simple and quick. Product shipped within a reasonable time frame and was packaged for safe travels. Excited to find a reputable company with many options for products.

The Gemstone Lab

Achieve a flawless, high-gloss finish on curved glass surfaces with this precision-crafted felt cone for lapidary flat laps. Designed specifically for polishing the inside contours of glassware and bottles, this cone delivers smooth, consistent results where flat tools fall short.

Measuring approximately 3 inches in both base diameter and height, the cone provides an ideal shape for accessing tight curves while maintaining excellent control. Each cone is fitted with a durable 5/8"-11 threaded brass adapter, ensuring secure compatibility with Covington Flat Lap machines for easy setup and reliable performance.

When paired with cerium oxide, this felt cone excels at producing an optically clear, professional-grade polish on glass surfaces. Whether you're refining artistic pieces or restoring clarity to functional glassware, this tool is a dependable addition to any lapidary setup.

Key Features:

  • Perfect for polishing interior curves of glassware and bottles
  • Approx. 3" base diameter × 3" height
  • Includes 5/8"-11 threaded brass adapter
  • Compatible with Covington Flat Lap series
  • Ideal for use with cerium oxide for crystal-clear finishes

A must-have for lapidary artists seeking precision and brilliance in their glass polishing work.

Shipping Information

Free Ground Shipping in the continental USA.

At the Gemstone Lab, we aim to deliver your lapidary tools and supplies quickly and safely.

That's why we only ship using UPS, FedEx, or USPS.

We offer free ground shipping on all orders within the United States. No minimum purchase is required -  every order qualifies! Our ground shipping is handled by trusted carriers to ensure your items arrive safely and on time.

What to Expect When You Place an Order

Once your order is confirmed, you'll receive a confirmation email detailing your purchase and order number. As soon as your order is shipped, you wlll receive a notification with all shipping details and a tracking number so you'll know exactly when your package will arrive. 

Fast Order Processing

We start processing your order right away. Most orders ship withing 1-2 business days, so you can get started on your next project before you know it. 

Shipping Times

Delivery times vary based on your location. Most U. S. order arrive within 3-6 business days. Expedited shipping options are also available at checkout for certain items for an additinal fee if you needs a product sooner. Made to order products cannot be guaranteed withing this timeframe are is noted on each product page. 

International Shipping

We currently do not offer shipping outside of the United States.

Secure Packaging

Every order is carefully packed to ensure your items arrive in perfect condition. Fragile tools, blades, and other delicate lapidary items are given extra care during packaging and boxing to prevent damage in transit.

 

If you have any question about our shipping policies or need assistance with a product, please don't hesitate to reach out to our friendly customer support team. We're happy to help make your lapidary adventure more fun in any way we can! Give us a call at 855-487-9637.