SIZE | 5/16″ |
NO. OF FLUTES | 4 |
LENGTH OF CUT | 3/4″ |
SHANK DIAMETER | 3/8″ |
TOOL MATERIAL | High Speed Steel |
FINISH COATING | Bright Finish |
CENTER CUTTING | No |
SINGLE OR DOUBLE END | Double |
OVERALL LENGTH | 3-1/2″ |
CORNER RADIUS | 0 |
CUTTING DIRECTION | Right Hand |
FLUTE SHAPE | Spiral Flute |
FLUTE LENGTH | 3/4″ |
HARDNESS | 58 to 60 RC |
5/16″ Double End Mill (4-Flute)
5/16″ mill diameter, 3/4″ cut, 3-1/2″ length
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1/4″ HSS Tool Blank Set
Lathe tools—also known as tool bits—are the cutting tools used for turning, facing, and other operations on a lathe. The most commonly used are high-speed steel (HSS) tools, which are suitable for machining a wide range of materials including wood, plastic, aluminum, brass, and steel. HSS tools maintain their hardness at temperatures up to 1000°F (588°C), making proper depth of cut, cutting speed, and feed rate essential for optimal performance.
One of the key advantages of HSS tools is how easily they can be resharpened using a standard aluminum oxide grinding wheel. Once sharpened, they retain a keen cutting edge through extended use.
Each Sherline lathe comes with a pre-sharpened 1/4" HSS cutting tool. Pre-ground tool sets—featuring right-hand, left-hand, and boring tools—are also available. However, for long-term savings and flexibility, learning to grind your own tools from blanks is recommended. Custom-shaped tools can be saved for repeat jobs or re-ground for new applications.


Carbide Inserts (thread, groove)
These Carbide inserts are used in the Insert Tool Holder and are used for either threading or grooving.
Thread Cutting
- 60° threading insert for cutting outside threads (P/N 22675)
- .031" insert (P/N 2269)
- .062" insert (P/N 2270)
- .094" insert (P/N 22694)
- .125" insert (P/N 22695)
- .031" radius insert (P/N 22692)
- .062" radius insert (P/N 22693)