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Sherline 3100 Sherline Thread-Cutting Attachment

SKU: 3100

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Sherline 3100 Sherline Thread-Cutting Attachment- When the Sherline lathe is set up with the thread cutting attachment, the motor is removed and the spindle is turned by a large handwheel. A thread is being cut in a part held in a 4-jaw chuck.

In the foreground are some of the change gears cutting different size threads.
One of the big advantages of having a lathe is being able to machine threads. Many threads can be cut using taps and dies, but having a tap and die set that will enable you to cut all the non-standard thread sizes would be quite expensive.

Sherline offers a unique and versatile thread-cutting attachment for its lathe. This low cost attachment enables you to machine thirty-six different unified thread pitches (Pitch range form 80 to 5 threads threads per inch) and twenty-eight different metric thread pitches (Pitch range from .25 to 2.0mm). What's more, it allows you to cut them as either left-hand or right-hand threads.

The lathe tool can be ground to cut any of the various thread forms, and any of these various pitches or thread forms can be cut on any pitch diameter you desire. This versatility enables you to machine any standard or nonstandard thread you might desire as long as it is within the size limitations of the lathe.

The attachment consists of 15 gears, mounting brackets, engagement mechanism, and 4.00" (102mm) handwheel. Thread are generated on the Sherline lathe by gearing spindle to the leadscrew. As the spindle is rotated with the handwheel mounted on the headstock spindle, the tool will advance an amount determined by the ratio of the gears. when the tool has completed its movement, you simply stop cranking, back up the tool and turn the spindle in the opposite direction until the tool is past its starting point. Then reset the tool and you're ready for the next pass. It's as simple as tapping! By using a 127-tooth gear (supplied), true metric threads can be cut on an inch (model 4000,4500,4400,) or true inch threads on a metric (model 4100,4530, or 4410) lathe.

3100 Sherline Thread-Cutting Attachment Instructions