Cutting tool not included.
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One of these tool holders is included with the quick-change tool post system. If you are working with boring tools of different sizes or depths that you would like to have pre-installed in interchangeable tool holders to take full advantage of the quick-change nature of the system, it might be desirable to have a second holder on hand.
For another way to use inserted tip tools with the quick-change tool post see the carbide insert tool holder.
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Always wear safety glasses when operating machine tools. |
Download PDF 2250 Instructions
| Tool Post and Holders Body Material | Steel |
|---|---|
| Body Coating | Black Oxide |
2285 | |
|---|---|
| 22650 | QC 3/8″ Boring Tool-Holder Body |
| 22560 | 10-32 x 1″ Cup Point Set Screw |
| 22680 | QC Height Adjuster |
| 32100 | 10-32 Hex Nut |
| 32100 | 10-32 Hex Nut |
| 40510 | 10-32 x 3/8″ Skt Hd Cap Screw (4) |
These 3/8" diameter boring bars hold a carbide insert secured with a Torx screw. Each comes with either a 2-sided 55° or 80° carbide insert and Torx wrench. The 55° LH boring tool will fit into a 3/4" starting hole. The 80° holder will fit into a smaller 1/2" hole. The 80° holder offers a little more strength for roughing cuts while the 55° insert will cut into sharper corners. The 3-1/4" long holder can bore a hole a little over 2" deep with two fastening screws tightened on it. The holders are made from 1144 Stress-proof steel with a black oxide finish. Available individually.
These LH boring bars are not intended to be used for boring on a standard Sherline lathe, as the spindle is not reversible without electronic modifications. They were developed for a Sherline tool that is now in development where they will be used as a turning tool from the backside with the bit upside down. Watch for the introduction of this new “chucker” lathe soon.
Though relatively expensive, if a cutting edge of a carbide insert becomes dull or chipped, the insert can be removed and rotated 180° to expose two new cutting surfaces, providing, in effect, two tools for the price of one.
The primary method of cutting metal on miniature machine tools is usually with high-speed steel tools as they are inexpensive, easily resharpened and can be ground into "form" tools for special jobs. However, inserted tip carbide tools can be lifesavers for some jobs. Though more expensive and not able to be resharpened, carbide tools hold their cutting edge when cutting exotic metals like stainless steel or titanium or abrasive materials like carbon fiber and can speed up the cutting process. This is why they are used for most cutting tasks in the modern professional machine shop.
NOTE: A tool is named by the direction from which the chip leaves the tool; so a right-hand tool has its cutting edge on the left and the chip peels off to the right.
This holder is not included with the Quick-Change Tool Post System (P/N 2250) but is available separately for users who want to take advantage of the enhanced cutting performance offered by carbide tools. The holder includes one 55° carbide insert with two cutting edges, secured by a small screw. A Torx wrench for tightening the screw is also provided.
Like the Quick-Change Tool Post and other dovetailed holders in the system, this inserted tip holder is made from case-hardened steel with a black oxide finish for durability and corrosion resistance.
To learn more about the benefits of using inserted tip carbide tools, CLICK HERE to download a detailed PDF guide.
