A high focus on hygienic design ensures that the bearing house can be cleaned behind and around the shaft and furthermore, NGI offers hygienic spacers to increase the distance to machines and equipment to over an inch as recommended by the USDA.

Sum up of requirements for the USDA certification:

- 1 inch  (25mm) minimum space
- Material food approved
- Roughness maximum 1.6 Ra we are at 0.8 Ra
- Radii minimum 3.2 mm

3-A SSI is a US-based, non-profit organization dedicated to improving hygiene design in the food, beverage, and pharmaceutical industries. The standards set are intended to ensure product quality and thus protect the health of the end user. The principles and certificates are therefore recognized by many countries and food manufacturers.

For the certification of hygienic parts, the evaluation is based on design features, so that, for example in a pipe, small angles or small radii should be avoided. This is to ensure the protection of consumer goods from contamination, a simple possibility for cleaning surfaces, and easy disassembly for cleaning purposes.