Linear Ball Bushings

Frequently asked questions — Bearing Units

• How do I choose between the different LHF and LHR flange bearing housing types?

  The choice depends on the mounting orientation. LHF circular flange housings are fixed perpendicular to the support surface, which suits vertical guides or frame walls. Conversely, LHR rectangular flange housings feature a four-point fixing, providing superior rigidity to support lateral loads in the application.
• When is it necessary to use the open variant with -OP suffix?

  The open variant, identified by the -OP suffix, is essential when shafts are supported by a continuous rail support. This mounting is required for strokes exceeding 50 times the shaft diameter, allowing the bushing to slide directly over the support rail during the linear movement of the equipment.
• Which housing material should I choose for my operating environment?

  The choice of material depends on the mechanical and environmental constraints. Anodised aluminium is the common standard for classic applications. For heavy loads, zinc-plated steel is recommended to ensure the durability of the housing. Finally, technical plastic, of the POM type, is reserved for light-duty environments or specific applications in the food sector.
• How do I adjust the internal clearance of the housing for my application?

  Internal clearance adjustment is defined by three specific classes at the selection stage: K for standard clearance, L for light clearance, or M for medium clearance. This choice allows the bearing to be precisely matched to the precision and operating requirements of your mechanical assembly without any complex manual adjustment.
• What protection should be provided for the bearing housing in a heavily polluted environment?

  Each bearing housing comes as standard with a double-lip rubber seal, designed to retain the internal grease and block common contaminants. However, if the operating environment is heavily polluted, an additional protective bellows must be fitted directly to the shaft to prevent harmful particles from entering the mechanism.