Since 2020, the investing legend has dumped many financial, drug and airline stocks — not long after buying them for the first time.

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Spoilboard resurfacing is actually a very common thing that has to be done with new CNC routers, as well and reconditioning the surface after it has been cut into many times.

All told, Buffett and his team oversee around 50 stocks in Berkshire's equity portfolio, which is valued at more than $300 billion.

What makes the 1-1/2" surfacing different? Typical surfacing bits for CNC routers are 1" diameter. They work fine. However, they do take longer to do your surfacing work. With the 1-1/2 inch surfacing bit, and a stepover of 90%, the surface work can be done in half the time, and you'll have a much smoother finish due to the broad cutting area.

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This 1.5" diameter surfacing bit is made specifically for hobby and semi-professional CNC'ers. It is made to get effective clean-up on your spoilboard in one pass at high feed rates.

I checked the carbides and shank of my specific bit on my level plate versus the shank and the bottom of their edges were all perpendicular to the shank and the contact surfaces were within 0.0004" full contact. This is much better than I expected. This reduces the path traces on the MDF spoil board IF your table surface is really parallel to the CNC X&Y axis and the router/spindle Y axis has been accurately trammed . In other words, I doubt many of us have all that down to the 0.0004" precision of the surfacing bit.

To read more about what a spoilboard is, read this article or watch this video about surfacing bit feeds and speeds, or this video about how a surfacing flattening bit can be used.

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In the prior Q2, Berkshire chopped its position in Apple nearly in half, also cutting stakes in Chevron (CVX) and several other stocks. It added to Occidental Petroleum (OXY), while exiting Paramount Global (PARA) and Snowflake (SNOW).

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Apple now makes up 31% of Berkshire's total equity portfolio. That is down from 41% before the Q2 2024 cuts, but up from 6% in 2016.

6:01 AM ET Amid huge investments, some AI stocks are out-performing. Meta has gained 66% in 2024; Microsoft only 12%.

It's a solid bit and does a great job at milling. But I have a shapoeko 5 pro with the bit setter. Since it is a massive bit and has about a .125 depression in the center, my bit setter sets the zero to that. The blades actually have a wider diameter than the bit setter. So it plunges deeper and has gotten stuck several times.

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This 1-1/2 inch surfacing bit, designed for super-smooth cuts, is used in your CNC router to surface or flatten your CNC router spoilboard (also called a spoiler board, or waste board), as well as slab flattening, and prepping your CNC router project surfaces. The surfacing bit for CNC routers is a super-important bit to have.

This 1-1/2 inch surfacing bit, designed for super-smooth cuts, is used in your CNC router to surface or flatten your CNC router spoilboard (also called a spoiler board, or waste board), as well as slab flattening, and prepping your CNC router project surfaces. The surfacing bit for CNC routers is a super-important bit to have.

Buffett is known as a buy-and-hold investor, hanging on to stocks for years and even decades. But there has been rapid turnover lately.

In fact, you could call Apple the poster child for Warren Buffett stocks due to its strong earnings, returns and management.

Receiving your new CNC router is exciting. One of the first tasks you will want to do is level up your spoilboard for 2 reasons.

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IBD generally uses a different stock-picking strategy than Warren Buffett does. But companies owned by Buffett can sometimes be found on the IBD Leaderboard and IBD 50 list of top growth stocks.

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You need to keep up on Warren Buffett stocks, because while the Berkshire Hathaway (BRKB) chief sticks to a winning investing formula, that doesn't mean sitting still.

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In the third quarter of 2024, Buffett's Berkshire further slashed its massive Apple (AAPL) position, the company's 10-Q filing revealed on Saturday. Despite a 25% position cut in Q3, Apple stock remains one of the largest holdings in Berkshire's closely watched investment portfolio.

Used this bit for the first time in the same application I used my Carbide 3D MdFly surfacing bit, and this bit left burn lines on the wood.

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What's more significant is the 4-flute design. Most surfacing bits only have three flutes. This allows for better finishes with faster cutting speeds. And more flutes means extended tool life, as well.

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You'll find the surfacing bit is a necessary bit almost immediately after you get your CNC router. This is because most spoil boards (a.k.a waste board or spoiler board) are not parallel to the router motion. So you need a flattening bit to resurface it.

Apple stock is among the top five holdings in Berkshire Hathaway's portfolio by number of shares. But it is easily No. 1 by market value.

Between 1965 and 2023, Berkshire Hathaway's stock portfolio posted a 19.8% compound annual gain. That is nearly double the 10.2% return of the S&P 500 index, with dividends included.

Earlier filings had shown that Berkshire Hathaway sold Bank of America (BAC), one of the conglomerate's largest stock holdings, in Q3. It has continued to do so in the current fourth quarter. Berkshire also increased its stake in Sirius XM (SIRI) in October, filings showed.

As of October, these are the top stocks in Berkshire's portfolio by number of shares, based on regulatory filings tracked by whalewisdom.com:

However, Buffett continues to prioritize finding and buying quality stocks at a fair price — and holding them for the long term. He patiently builds those stock positions over time.