Automotion Components Bearing Support Units
What is...
Materials
Housing material options
Cast iron housing
Standard version, passivated and painted Ø12-120mm.
Stainless steel housing
Stainless AISI 304, Ø12-60mm.
Thermoplastic housing
Food grade applications, smooth PBT resin material, Ø20-40mm.
Technical specification - materials
Suitable for:
- Wet environments.
- Chemical environments.
- Frequent wash downs.
e.g. food, pharmaceuticals, bottling, outdoor application etc.
Protective end caps made of stainless steel, SCC and SCO models
- Open protective end cap for through shafts with double-lip seal made of flourine elastomer.
- Closed protective end cap for shaft ends.
- Stainless steel AISI 304.
- Shafts Ø 12 - 60mm.
- Standard sizes available from stock.
- Stainless steel self-aligning units. Stainless steel (AISI 304 body) with AISI 440C stainless bearing unit.
- For shafts Ø 12-60mm.
- Lubricated with food grade grease (USDA H1 approved), Mobil FM102.
- Temperature range -20°C to +120°C.
Pillow block
Four point flange
Two point flange
- Generally used in food, pharmaceutical and chemical industries, or where washdown is needed/outdoor applications.
- Use with h6 tolerance shafts.
Ball bearing units made of stainless steel are used in areas where corrosion resistance is a must. In these areas where high atmospheric humidity or the requirement for periodic washdown of the equipment is necessary to prevent bacteria growth, conventional ball bearing units made of cast iron do not suit.
We off er a comprehensive standard range of ball bearing units made of stainless steel. To satisfy the requirements of the pharmaceutical and food industries all our ball bearing units made of stainless steel are filled with grease meeting the USDA H1 food grade specification.
Thermoplastic
- Thermoplastic self-aligning unit, with stainless steel insert.
- For diameters of shaft 20-40mm.
- White PBT resin (prevents retention of dust, mould and bacteria).
- Lubricated with food grade grease (USDA H1 approved).
- Temperature range -15°C to +90°C.
- Excellent chemical resistance (acids, bases, organic solvents, salts etc.).
Pillow block
Four point flange
Two point flange
- Can be used in wet or chemical environments such as bottling lines, food or pharmaceutical production lines, outdoor applications etc.
- Use with h6 tolerance shafts.
Installation
Description of the installation steps
Self-aligning bearing units must be installed under conditions that ensure maximum bearing life. We recommend that you refer to the following chapters and follow the reference procedures for this type of bearing unit.
When installing sealed bearings, grease the seals to avoid dry operation when the shaft first starts to rotate.
Make sure that the seating surfaces are perfectly clean and flat before starting any installation operations.
Install the shaft by mounting the bearing unit housings on the supporting frame. Tighten the inner ring retaining screw to the required torque indicated in the torque value table.
In all cases the shaft is installed first by attaching the bearing unit housings to the supporting frame. Tighten the screws in alternate diagonals.
Installation / removal of protective covers
The covers (if required) are installed by snap-fitting, which can be done with a light blow of a mallet. They are removed by inserting the tip of a screwdriver into the cavity and applying light pressure to release them.
Installation
- Check clean and flat surface
- Tighten retaining screws, diagonal method
- Check shaft can be rotated by hand
- Check no distortion
Tightening of stainless steel fitting screws
M6 thread, torque to 3.9 Nm
M8 thread, torque to 8.3 Nm
Permissible misalignment
- With provision for re-lubrication, the bearing can swivel inside the housing up to an angle α of about 5° (the groove is aligned with the lubricator hole) and 8° without provision for re-lubrication
- Pay attention to the swivelling of the bearing in the bearing unit. Permanent swivelling induced by rotational deflection of the shaft would cause wear of the housing and is therefore not allowable (angle ß)
- The maximum allowable values are those for deep-groove ball bearings corresponding to the same shaft diameter (maximum angle ß < 0.5 )
