knurling
Knurling tool on a centre lathe.
The knurled surface is easier to turn with one's hand than a smooth surface.
Knurling is a machining process normally carried our on a centre lathe. The act of Knurling creates a raised criss cross pattern on a smooth round bar that could be used as a handle, or something that requires extra grip
The lathe
Knurling is a machining process typically performed on a lathe or milling machine, used to create a textured pattern on the surface of a workpiece. This operation enhances grip and can also serve decorative purposes. Knurling involves pressing a hardened tool, known as a knurling tool, against the material while it is rotated, forming raised patterns without removing material. It's commonly used on handles, knobs, and other components where improved tactile engagement is desired.
It is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, use to create an object which has symmetry about an axis of rotation. http://en.wikipedia.org/wiki/Lathe_(tool)
it is an old machine.It can be ised for various operations like turning,taper turning,knurling,slotting,facing,threading etc. But it can be used mostly only for cylindrical jobs. you can find it in many small workshops.
The main operations on a lathe are -turning( reducing diameter) -facing( reducing length) -tapering( making a conical shape) -knurling( making a diamond shaped pattern for easy grip) -grooving( making a symmetrical indentation) -parting( removing a section) -eccentric turning( turning about a point other than axis) -chamfering( creating a radially symmetrical chamfer) others include boring, drilling etc.
The carriage hand wheel on a lathe machine is used to manually move the carriage along the bed of the lathe. This allows the operator to adjust the position of the cutting tool relative to the workpiece for precise machining operations. By turning the hand wheel, the operator can control the feed rate and depth of cut, enabling fine adjustments during turning processes.
A lathe is not a lever.
A lathe is not a lever.