Horological Milling Machine Bushing and Depthing Accessory
This accessory was developed based on a concept shared by longtime Sherline user and Craftsman of the Year, Jerry Kieffer. The idea is to adapt a small milling machine for multiple clock and watch repair tasks - replacing the need for several specialized tools. It simplifies and enhances depthing by letting you position a gear exactly where it needs to be, check its mesh with a mating gear, and then precisely machine the bushing hole in the correct location.
With the Sherline mill, you can precisely position and align clock and watch components, allowing for highly accurate machining of bushing holes in both size and location. Once the machining is complete, the mill can also serve as a manual press for bushing insertion.
Used in combination with your Sherline mill, this accessory transforms your setup into a versatile three-in-one clock and watch repair machine - while retaining the full functionality of a precision milling machine.
The photos show the depthing attachment on a 5400 mill. If you want to use it on a 5000-series mill you will need to add the headstock spacer block.
High Speed Steel Boring Tool
Lathe tools, or tool bits as they are sometimes called, are the cutting tools that are used for turning and facing work on the lathe. The most popular lathe tools are those made of high-speed tool steel (HSS). They can … Continued
Left Hand HSS Tool
Lathe tools—often referred to as tool bits—are the primary cutting tools used for turning and facing operations on a lathe. The most common type is made from high-speed steel (HSS), which is suitable for machining a wide range of materials, including wood, plastic, aluminum, brass, and steel. HSS tool blanks are relatively inexpensive and can maintain their hardness at temperatures up to 1000°F (588°C), making proper control of depth of cut, cutting speed, and feed rate essential.
A major advantage of HSS tools is how easily they can be sharpened. They can be shaped and resharpened using a standard aluminum oxide grinding wheel and, once sharpened, will hold their edge for a long time.
NOTE: A lathe tool is named for the direction the chip exits the tool. A right-hand tool has its cutting edge on the left, causing the chip to peel off to the right.
Right Hand HSS Tool
Lathe tools—often referred to as tool bits—are the primary cutting tools used for turning and facing operations on a lathe. The most common type is made from high-speed steel (HSS), which is suitable for machining a wide range of materials, including wood, plastic, aluminum, brass, and steel. HSS tool blanks are relatively inexpensive and can maintain their hardness at temperatures up to 1000°F (588°C), making proper control of depth of cut, cutting speed, and feed rate essential.
A major advantage of HSS tools is how easily they can be sharpened. They can be shaped and resharpened using a standard aluminum oxide grinding wheel and, once sharpened, will hold their edge for a long time.
NOTE: A lathe tool is named for the direction the chip exits the tool. A right-hand tool has its cutting edge on the left, causing the chip to peel off to the right.
