About the Insert Boring Bars with Two Flats
When we designed our gang-tooling tool post (P/N 5930), it was specifically for our customers who wanted to convert their Sherline lathe into a “Chucker Lathe” or gang-tooling lathe. Most of the parts to be manufactured on a chucker lathe are going to be in the range of 1/2″ (13mm) diameter or smaller. The distance between centers on our gang-tooling tool post is 1.5″ (38mm). With these part sizes and the spacing, we realized that our boring bars could be used as both boring bars and outside diameter turning tools.
We added a second flat to our standard boring bars* so they could be held with the insert face up or face down. This modification allows the right hand 55-degree and 80-degree boring bars to be used as boring tools on either the front or back side of the part (see Figure 1). Click on the Instructions tab above for more details on using the boring bars with two flats.
* NOTE: Standard 3/8″ boring bar part numbers: 2259 RH 55°, 2260 RH 80°, 2263 LH 55°, 2264 LH 80°
Consider the options and possibilities of using these boring bars as turning tools as well as boring bars. Also, consider using these boring bars with the insert face down to reduce chip buildup on top of the insert.
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I can do all this through him who gives me strength. Philippians 4:13