Glossary
Roller glossary
The terms that come up most in quotes and technical calls — explained plainly.
- Shore A (hardness)
- A hardness scale for elastomers such as rubber and polyurethane. On a roller, hardness sets the nip width and wear behaviour; it is chosen to suit operating conditions and, in a good covering, stays constant throughout operation.
- Vulcanisation
- The process in which rubber cross-links under heat and pressure to become elastic and durable. In roller covering it is the stage that sets the final hardness and service life.
- ST52 steel core
- A special alloy structural steel used for the roller body. Its high strength prevents deflection under load; it is CNC machined to tight tolerance and the covering is applied onto this core.
- Precision grinding
- Bringing the covered roller surface to precise dimension. It can be flat, conical or crowned. With a good covering, service life extends after grinding and hardness does not change.
- Grooving (diamond / helix)
- Channels cut into the roller surface. Diamond and helix profiles are used to evacuate water or air and to improve grip when transporting material.
- Antistatic covering
- A covering that prevents static build-up on the surface. In fiber-yarn and film lines static causes the material to wrap the roller and forces stops; an antistatic covering prevents this.