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TOLERANCES AND PRECISION CLASSES

Every GMN high-precision ball bearing results from the highest quality demands – from development to manufacturing. Minimum tolerances in dimensions, form and running precision provide the best performance and long life, and are defined by international (ISO 492) and national (DIN 620) standards. GMN high-precision ball bearings are manufactured to P4andABEC 7 to P2andABEC 9 precision classes or better.

INNER RING TOLERANCES

The “Precision classes and tolerances” technical information sheet can be found in our download area.

KL_Toleranzen_1220X1180RGB

OUTSIDE RING TOLERANCES

The “Precision classes and tolerances” technical information sheet can be found in our download area.

KL_Toleranzen2_1220X1175RGB

COMPARISON TO INTERNATIONAL TOLERANCE STANDARDS

KL_Toleranzen3_1220x115RGB

BEARING clearance IN GROOVED BALL BEARINGS

RADIAL AND AXIAL BEARING CLEARANCE

The path around which a bearing ring can be moved from one end position to the other without a measurable load is defined as bearing clearance.

  • radial bearing clearance:  Displacement in the radial direction
  • axial bearing clearance: Displacement in the axial direction
Lagerluft_1b_Kugellager_550x550
Radial bearing clearance 
Lagerluft_2b_Kugellager_550x550
Axial bearing play 

RADIAL BEARING clearance (AS PER DIN 620 and PART 4)

KL_Radiale Lagerluft_1220_englisch

Grooved ball bearings without information about bearing clearance are manufactured in CN (normal bearing play).