Spindle Ball



Spindle Ball Bearings Made by GRW: Our Quality Standards

Running accuracy, axial load capacity and rotational speed – when it comes to these features, spindle ball bearings yield excellent results all around. GRW develops customized solutions to meet the specific needs in sectors such as aviation and space or medical technology. Among these options our single-row, angular-contact ball bearings stand out to first-rate precision and long-term durability. Commonly known as spindle bearings, they consist of solid inner and outer rings as well as ball sets with window cages.

Characteristics of GRW Spindle Ball Bearings

  • accuracy class of ABEC 7 (DIN P4) and higher
  • contact angle of 15° (C) or 25° (E)
  • corrosion-resistant, high-performance steel
  • balls made from ceramics or steel
  • solid cages made from phenolic resin
  • oil or grease lubrication
  • suitable for bearing combinations with three defined preload classes
    (S, M, L) or individual preload force

Open vs. Covered Spindle Ball Bearings: Choose Your Benefits

Open Covered
high load-carrying capacity very good resistance against extreme temperatures and aggressive substances
suitable for oil-injection lubrication suitable for grease lubrication
bearing does not fall apart due to self-retaining ring elevation no additional friction due to contactless shields
single shoulder on outer ring high-speed bearing (without shields) available upon request
optimized speed capacity and increased axial rigidity with smaller balls
full protection against dust and other contaminates.

How to Install and Handle Angular-Contact Ball Bearings

  • Keep your workspace tidy and clean.
  • Avoid damage by reducing movement during transport.
  • Leave spindle ball bearings in airtight packaging until you begin with their installation.
  • Apply axial load only along the marked lines on the outer ring.
  • Avoid transmitting assembly forces through the balls.
  • Assemble pair bearings of type DB, DF, and DT only with the intended components in the right order. (Universally matched bearings require no particular order.)
  • Let spindle ball bearings run in at high rotational speed before putting them into operation.