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A,B,C,D,E |
The bearings inner structure has been changed. Outer dimensions remain the same. The letters have individual meanings, depending on brand and type of bearing. They are not normed. We advise to check in the manufacturers documentation. |
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2F |
Y-bearing by SKF: Standard seals with centrifugal discs on both sides. |
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2RF |
Y-bearing by SKF: Multi lip seals on both sides. |
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2RS, 2RS1, 2RSR |
Protection on both sides of bearing. Type of protection: Standard rubber seal, resting on the inner Ring. The different designations differ slightly in |
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2RS2, 2RSH |
Protection on both sides of bearing. Type of protection: double lip seal, resting on the inner ring. |
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2RZ |
Low in friction, steel plated protection made from NBR (rubber) on both sides of the bearing. |
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2LFS |
Both sides sealed with LFS (Low Friction Seal). |
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2Z |
Protection on both sides of bearing. Type of protection: Steel sheilds on both sides. Non contact seal, prone to dust and humidity. |
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AS |
lubrication hole in the outer ring |
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BE |
Single row angular contact bearing by SKF: 40° angle of contact, optimised inner design. |
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C2 |
Clearance: Radial clearance lower than normal. |
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C3 |
Clearance: Radial clearance higher than normal. |
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C4 |
Clearance: Radial clearance even higher than C3. |
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CA |
Single row angular contact bearing: low axial clearance before assembly. |
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CB |
Single row angular contact bearing: normal axial clearance before assembly |
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CC |
Single row angular contact bearing: higher axial clearance before assembly |
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CLN |
Taper roller bearing with tolerances by ISO norm 6X |
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DA |
changed snap ring groove |
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DB, DF, DT |
set of bearings: Two single rowed bearings, prepared for assembly together. The suffixes A,B,C,CA,CB,CC,C,GA,GB,G show the axial clearance and the preloads.
For details check the brands documentation. (Catalogue) |
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EC |
Zylindrical roller bearing by SKF, optimised interior design |
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F |
massive steel cage |
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G.. |
SKF lubrication, for Details consult the SKF-Catalogue |
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GS.. |
Housing locating washer of a cylindrical roller thrust bearing. Also see WS. (Wellenscheibe) |
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H |
Snap cage made from pressed steel cage. |
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HV |
Y-Lager SKF: Components made from stainless steel, foodsafe lubrication. |
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J |
Cage made from steel sheet. Only written, if steel cages are not standard for the type. |
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J2 |
Cage made from steel sheet, Variant 2 |
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K |
tapered bore 1:12. Bearing cannot be mounted on a cylindrical shaft. Needs a clamping sleeve. |
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K30 |
same as K, tapered bore 1:30 |
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M |
Solid brass cage (also see: Y) |
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MA |
like M, guided by outer ring |
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MB |
like M, guided by inner ring |
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MP |
windowed solid brass cage |
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MT33 |
lithium soap grease for operating temperatures from -30 bis +110 °C |
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N |
snap ring groove on the outer ring, for dimensions see catalogue |
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N2 |
two circular grooves on one end of the outer ring |
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NR |
See N + additional snap ring already mounted |
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P |
rubber seal on one side of bearing |
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P4 |
tolerance class: high precision bearing with extremely low tolerances. (even more precise than P5) |
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P5 |
tolerance class: high precision bearing with low tolerances. |
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P6 |
tolerance class: high precision bearing with lowered tolerances. Specifications are found in bearing catalogues. |
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PP |
rubber seal on both sides of bearing |
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R |
a) flanged on outer ring
b) support rollers: sphered outer ring, also see X a) |
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R.. |
inner or outer ring of bearing .. with set of rollers |
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RS |
rubber seal on just one side of bearing. See 2RS for both sides. |
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S |
self-aligning roller bearing FAG: lubrication groove and holes in outer ring. Also see W33 with bearings by FAG, NKE. |
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S0 |
heat treated bearing, usable up to +150°C |
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S1 |
heat treated bearing, usable up to +200°C |
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S2 |
heat treated bearing, usable up to +250°C |
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S3 |
heat treated bearing, usable up to +300°C |
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S6.. |
deep groove ball bearing type 6... STAINLESS STEEL |
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SK |
radial insert ball bearing: inner bore is hexagonal. (not cylindrical!) |
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SQ.. |
General term: Special quality norm. The following digits designate the according norm.
SQ77: electrically insulated bearings. |
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T41A |
self aligning roller bearing by FAG, for vibrating application. Also see VA405 (SKF) |
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TB |
windowed phenolic resin cage with fiber inlets |
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TN |
poliamide cage |
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TN9 |
poliamide claw-type cage, guided by the rollers. Also see TV |
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TNH |
polyetheretherketone (PEEK) cage, suitable for special applications. See SKF-catalogue (5000 G, Jan. 2004, P. 142) |
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TVP2, TVP3 |
Window-type polyamide cage, Variant 2 or 3 |
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TVH |
Claw-type polyamide cage. For details see bearing catalogue |
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TVPB |
window-type polyamide cage. Guided on inner ring. |
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UL |
light preload while mounted. |
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UM |
medium preload while mounted. |
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UH |
high preload while mounted. |
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V |
full compliment ball or roller bearing (higher number of rollers, no cage) |
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VA201,VA208,VA228 |
bearings by SKF for extremely high temperatures (for use in ovens). Please see SKF-catalogue for details. |
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VA405 |
self aligning roller bearing by SKF for use in vibrating machines. Also see T41A (FAG) |
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VIT |
Rotary oil seal mde from fluororubber (FPM/FKM), higher resistance to temperatures and solvents. See our infopage for oil seals for details. |
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W33 |
lubrication groove and 3 holes in outer ring |
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WS.. |
shaft washer of a self aligning thrust roller bearing. Also see GS.. (housing washer) |
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X |
a) cylindrical outer mantle for support and curve rollers, when normal variant is with spherical mantle.
b) articles that have been conformed to international norms (i.e. some tapered roller bearings) |
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Y |
pressed brass cage (also see M and J) |
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Z |
metal shield on one side of bearing |
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ZW |
two row needle roller bearing |
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ZZ |
metal shield on both sides of bearing. |
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