7 keys to perfect lathe cutting of rubber gaskets

Rubber compound
1. High X linking density
2. Good ratio between filler and plastisizer
3. High tear resistance
Blade
1. Hard surface, treated or Tungsten Carbide
2. Fine grains for perfect surface
3. Slim (asymmetric cutting angle)
4. Circular for best surface, pin ended for high speed
Lubricant
1. Low friction
2. Low viscosity (can be even compressed air)
3. Environment friendly
Machine
1. Precise
2. Solid, low vibration, heavy
3. Compact
Spindle
1. Loose or tight fit
2. No longitudinal tension (air support)
3. Well centered
Speed / feed rate
1. Rpm*dia must fit to compound and blade
2. Feed rate in constant relation to speed
3. CNC axis better than curved cam control
Position (of blades)
1. Exact orthogonal to hose axis
2. Below centre for pin end blades (depending on direction)
3. On centre for circular blades