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Designation of GMN high-precision and high-speed ball bearings

Designation of GMN high-precision and high-speed ball bearings

Designation of GMN high-precision and high-speed ball bearings

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We present the basic designations of GMN ball bearings.

HY 6202 2Z T9H P4 C3 DUA 10.15 S1 Fett
1 2 3 4 5 6 7 8 9

 

1. Material
  • (no designation) straight ball bearing made of additional chrome steel)
  • M - bearing made of steel resistant to high temperatures
  • HY - hybrid bearing, balls made of a material other than bearing rings
2. Bearing type
  • 6202 (example) standard designation
3. Other performance
  • X - bearing width - B, wider than for the series of bearings in standard executions
  • Z - one-sided steel sheet seal, mounted with an expanding ring
  • 2Z - double-sided steel sheet seal, mounted with an expanding ring
4. Basket
  • J - bearing cage made of steel sheet
  • T9H - glass fiber reinforced polyamide snap cage, injection molded, ball-guided
  • TBH - resin-hardened (textolite) snap-on polyamide cage, centered on the inner ring
  • TA - resin hardened (textolite) solid cage guided on the outer ring
  • TB - resin-hardened massive cage (textolite) guided on the inner ring
  • MA - a massive brass cage guided on the outer ring
  • TN - a massive polyamide ball-guided basket
  • TBM - massive textolite basket centered on the inner ring
5. Rotation accuracy and accuracy class
  • - / A1 accuracy class PO according to DIN620 (letter-digit designation is not used) A1 according to ANSI / ABMA
  • P6 / A3 P6 accuracy class according to DIN 620 (designation available on request)
  • P5 / A5 accuracy class P5 according to DIN 620, A5 according to ANSI / ABMA standards
  • P4 / A7 accuracy class P4 according to DIN 620, A7 according to ANSI / ABMA standards
  • P2 / A9 accuracy class P2 according to DIN 620, A9 according to ANSI / ABMA standards
  • A7 ABEC7 accuracy class according to ABMA
  • A9 ABEC9 accuracy class according to ABMA
  • HG GMN accuracy class (high accuracy)
  • UP accuracy class according to GMN factory standards (ultra accuracy)
6. Radial bearing play
  • C2 - slack less than normal
  • (none) - normal clearance (alphanumeric designations are not used)
  • C3 - slack greater than normal
  • C4 - clearance greater than C3
  • C5 - clearance greater than C4
7. Designation of the bearing arrangement (combinations of bearing units)
  • DF - a set of 2 bearings arranged in a similar arrangement (arrangement X)
  • DB - a set of 2 bearings arranged back-to-back (O arrangement)
  • DT - a set of 2 bearings arranged in tandem
  • DUA - a set of 2 bearings universally combined with axial play
  • DUO - a set of 2 bearings set universally without longitudinal play
  • DUV - a set of 2 bearings universally combined with the initial clamp
8. Marking of the thermal stabilization of the bearing
  • S1 bearing adapted to work at temperatures up to +200 o C
  • S2 bearing adapted to work at temperatures up to +250 o C
  • S3 bearing adapted to work at temperatures up to +300 o C
9. Grease marking
  • shortened designation of the grease eg Asonic GLY 32
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Bosch Rexroth
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