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Prefixes :

Brand Prefixes Description
NTN AC Bearings with anti creep
SNR CH Hybrid bearing, steel rings and ceramic balls
NTN E Bearings in case hardened steel
NTN EA Bearings in nitrided case hardened steel
NTN EC Bearings with thermal expansion compensation
NTN EC1 Bearings with thermal expansion compensation, high temperature version
NTN ECO Longer life tapered roller bearings
NTN ET Tapered roller bearings in strengthened case hardened steel
NTN ETA Tapered roller bearings in nitrided strengthened case hardened steel
NTN F Bearings in stainless steel
NTN FL Bearings with flange on outer ring OD
NTN HL Surface treatment
NTN LH Longer life double row spherical roller bearings
NTN M Bearings with surface treatment
SNR ML High precision angular contact bearings for high speeds
SNR MLCH High precision angular contact bearings with ceramic balls for high speeds
SNR MLE High precision angular contact bearings for high speeds, double sided non-contact seal
SNR MLECH High precision angular contact bearings with ceramic balls for high speeds, double sided non-contact seal
NTN MX Anticorrosion treatment
NTN N Special material composition
NTN TA Bearings in nitrided steel
NTN TM Bearings in specially treated steel
NTN TS Bearings for high operating temperatures
NTN TS2 Stabilisation treatment for temperatures over 160°C
NTN TS3 Stabilisation treatment for temperatures over 200°C
NTN TS4 Stabilisation treatment for temperatures over 250°C
NTN 4T Tapered roller bearings in case hardened steel
NTN 5S Bearings with ceramic rolling elements


Suffixes :

Brand
Suffixes Description
NTN A Modification of the internal design
SNR A Bearings with a single row of radial contact balls with higher capacity
SNR A Bearings with a single row of angular contact balls, polyamide cage
SNR A Bearings with a double row of radial contact balls, without slot, polyamide cage
SNR A Bearings with a double row of angular contact balls, without slot, polyamide cage
SNR A Seal V-Ring version A for SNC Ball bearing unit (optional with FS seal)
NTN AD Contact angle 25°
SNR A1 Removable
NTN B Standard production of double row spherical roller bearings
NTN B Contact angle 40° for angular contact ball bearings
SNR B 32° for double row angular contact ball bearings
SNR B 40° for single row angular contact ball bearings
SNR B 20° for tapered roller bearings
SNR BG Single row of angular contact balls bearings for non-preload universal pairing
NTN B3, B5, B7 Precision in compliance with ABEC 3, 5 or 7 standards
NTN C Contact angle 15° for angular contact ball bearings
NTN C Increased contact angle for tapered roller bearings
NTN C9, C0, C1 Special clearance, high precision
NTN / SNR C2 Internal clearance smaller than normal clearance
NTN / SNR C3 Internal clearance larger than normal clearance
NTN / SNR C4 Internal clearance larger than C3
NTN / SNR C5 Internal clearance larger than C4
NTN CMxx Average clearance in microns for bearings with balls of between diameter 10 and diameter 50 mm
NTN CM09 Special internal clearance, medium value between 5 and 13 μm
NTN CM13 Special internal clearance, medium value between 9 and 17 μm
NTN CM17 Special internal clearance, medium value between 13 and 21 μm
NTN CM21 Special internal clearance, medium value between 17 and 25 μm
NTN CM25 Special internal clearance, medium value between 21 and 29 μm
NTN CM30 Special internal clearance, medium value between 25 and 35 μm
NTN CM35 Special internal clearance, medium value between 30 and 40 μm
NTN CM40 Special internal clearance, medium value between 35 and 45 μm
NTN CM45 Special internal clearance, medium value between 40 and 50 μm
NTN CM50 Special internal clearance, medium value between 45 and 55 μm
NTN CSxx Average internal clearance in microns (1 micron = 1 μm = 0.001 mm)
NTN CT1 Ball bearing unit for low temperatures -60°C
NTN CxNA Reduced clearance ranges (but identical average clearance), paired rings
NTN CNL, CNS Internal clearances for miniature precision bearings
SNR C/C12 Internal design issue for tapered roller bearings
SNR CC Stainless steel closed protection plug for self-aligning ball bearing units
SNR CO Stainless steel open protection plug for self-aligning ball bearing units
NTN D Contact angle increased for tapered roller bearings
NTN D Lubrication holes (without grooves)
SNR D High precision lubricated angular contact ball bearings
NTN DB O layout
NTN DF X layout
SNR D** SNR greases
SNR DS Double lipped seal for SNC Ball bearing unit
NTN DT Tandem layout
NTN D0 Absence of groove and grease holes (for standard)
NTN D1 Groove and grease holes in the outer ring
NTN D2 D1 + anti-rotation ball on external diameter for Insert bearings
NTN / SNR E Increased capacity cylindrical roller bearings and double row spherical roller bearings
NTN / SNR EA Increased capacity double row spherical roller bearings with pressed steel cage
NTN / SNR EM Increased capacity double row spherical roller bearings with solid brass cage
SNR EE/2RS Double side contact seal
SNR EC End cover for SNC ball bearing unit
NTN En Special roller crowning
NTN F Solid Plummer block without holes. Ex. SN520F
NTN F1 Solid Plummer block with holes. Ex. UCP320F1
NTN F2 Ball bearing unit without attachment holes. Ex. UCP322F2
SNR FD Grease for food contact
SNR FS Felt seal for SNC ball bearing unit
SNR FT150 Sealed bearings for high temperatures up to +150° C
SNR FT150ZZ Shielded bearings for high temperatures up to +150°C
NTN F1 Solid steel cage
NTN F3 Turned solid steel cage
SNR F600 High temperature bearings for furnace kiln cars
SNR F604 High temperature bearings for furnace kiln cars greased and shielded
SNR F800 Increased load capacity double row spherical roller bearing for vibrating applications
NTN -G Inner ring + rollers (+cage) for tapered roller bearings (cone only)
NTN #G Outer ring only for tapered roller bearings (cup only)
NTN G Universal production
SNR G Removal sleeves – modified thread – compliant with ISO 2982-1
NTN G Fixed bearing unit that does not require a retaining ring. Ex. SD3130G
NTN G(n) Ball bearing unit with special attachment holes (n=1,2,3…). Ex. UCHB204G6
NTN GD2 2 universal bearings
NTN GL GN GM GH Preloads (Light, Normal, Medium, Heavy)
NTN G1 Solid brass cage
SNR G2 Re-greasing system for Insert bearings
SNR G14 Polyamide cage
SNR G15 Polyamide cage strengthened with glass fibre
SNR H Clamping sleeves with oil injection device (ex AH24T48H)
NTN HT Special internal design to withstand axial loads on cylindrical roller bearings
NTN HT2 Ball bearing insert for high temperatures +200°C
SNR HT200 Sealed bearings for high temperatures up to +200° C
SNR HT200ZZ Protected bearings for high temperatures up to +200° C
SNR HVZZ Protected bearings for high speeds up to 700 000 N.Dm
NTN J Pressed steel cage
NTN / SNR K Tapered bore 1/12
NTN / SNR K30 Tapered bore 1/30
NTN -L NUP without end plate
NTN #L End plate for NUP
NTN L1 Plummer block with greaser and drain hole. Ex. SN515L1Z
NTN L5 Plummer block with greaser hole and drain hole
SNR LA Labyrinth seal for SNC ball bearing unit
NTN LLJ Bearing housing with low torque three lipped seals
NTN LLS Bearing housing with high torque three lipped seals
SNR LT Sealed bearings for low temperature down to -40°C
SNR LTZZ Protected bearings for low temperature down to -60°C
NTN LU, LLU Nitrile friction seal (-20 to +120°C)
NTN LUA, LLUA Polyacrylic friction seal (-15 to +150°C)
NTN LUA1, LLUA1 Fluorinated elastomer friction seal (-30 to +230°C)
NTN LUA2, LLUA2 Silicone friction seal (-60 to +200°C)
NTN LUA4, LLUA4 Nitrile high temperature friction seal (+20 to +140°C)
NTN LUAX12, LLUAX12 Polyacrylic high temperature friction seal (-15 to +175°C)
NTN LB, LLB Nitrile non-friction seal (-25 to +120°C)
NTN LBA, LLBA Polyacrilic non-friction seal (-10 to +150°C)
NTN LBA1, LLBA1 Fluorinated elastomer non-friction seal (-30 to +200°C)
NTN LBA2, LLBA2 Silicone non-friction seal (-100 to +200°C)
NTN LH, LLH Low torque nitrile friction seal (-25 to +120°C)
NTN LHA, LLHA Low torque Polyacrylic friction seal (-10 to +150°C)
NTN LHA1, LLHA1 Low torque fluorinated elastomer friction seal (-30 to +200°C)
NTN LHA2, LLHA2 Low torque Silicone friction seal (-100 to +200°C)
NTN LHA4, LLHA4 Low torque nitrile high temperature friction seal (-20 to +130°C)
NTN LHAX12, LLHAX12 Low torque Polyacrylic high temperature friction seal (-10 to +150°C)
NTN LP03 Standard solid grease (-20 to +80°C)
NTN LP05 High temperature solid grease (-20 to +120°C)
NTN LP06 Food compatible solid grease -10 to +100°C (80°C continuous)
NTN LP08 High temperature Solid grease for needle rollers (-20 to +120°C)
NTN LX Special sealing system
NTN L1 Riveted solid brass cage
SNR L3 Three lipped seal triple for insert bearings
NTN L417 Grease: Kyodo Yushi/E5 (-30 to +180°C)
NTN L453 Grease: Kluber/Asonic HQ72-102 (-40 to +180°C)
NTN L627 Grease: Exxon Polyrex EM (-25 to +170°C)
SNR M Solid cage, centred on the rolling elements
NTN -N Outer ring + rollers (+cage) for cylindrical roller bearings
NTN #N Inner ring only for cylindrical roller bearings
NTN / SNR N Groove for retaining ring on the outer ring
NTN N Ball bearing unit in steel. Ex. P315N
NTN N1 Ball bearing unit in GS ductile cast iron. Ex. P315N1
NTN / SNR NR Groove and retaining ring on the outer ring
NTN NRS NR of opposite side to standard
NTN / SNR N2 Retaining slot
NTN PM Special bearing precision for electric motors
NTN / SNR P42 Precision class JIS 4 for the dimensions and JIS 2 for the run out in rotation
NTN P63E Precision P6 and clearance C3/DIN standard for electric motors
NTN / SNR P6 Precision class JIS 6
NTN / SNR P5 Precision class JIS 5
NTN / SNR P4 Precision class JIS 4/BAS 4 for tapered rollers
NTN PK Precision class K for tapered rollers, J series
NTN / SNR PXn Special precision with issue level
NTN QD Fill with grease: from 5 to 10%
NTN QE Fill with grease: from 7.5 to 12.5%
NTN QF Fill with grease: from 10 to 15%
NTN QG Fill with grease: from 12.5 to 17.5%
NTN QH Fill with grease: from 15 to 20%
NTN QJ Fill with grease: from 17.5 to 22.5%
NTN QK Fill with grease: from 20 to 25%
NTN QL Fill with grease: from 22.5 to 27.5%
NTN QM Fill with grease: from 25 to 30%
NTN QP Fill with grease: from 27.5 to 32.5%
NTN QQ Fill with grease: from 30 to 40%
NTN QR Fill with grease: from 35 to 45%
NTN QS Fill with grease: from 40 to 50%
NTN QT Fill with grease: plus from 50%
SNR S Spherical external diameter
NTN Snn Specific check (S20: railway/S30: wind turbine) (S10 Traction motor), (S80 Aerospace)
NTN ST Modified internal design (low torque)
NTN STVn Modified internal design (n = 1, 2, 3...) (low torque)
SNR SV Complete V-Ring seal for SNC ball bearing unit
SNR TA Taconite seal for SNC ball bearing unit
NTN TKBAnnnn Special spacer. Nnnn: order number
NTN TKZnnnn Special spacer. Nnnn: order number
NTN TKBNnnnn Special spacer. Nnnn: order number
NTN T1 Phenolic fabric cage
NTN T2 Plastic, nylon or Teflon cage
NTN T2X Special Polyamide cage for sealed ball bearings
NTN T2X Polyamide cage 4.6 for cylindrical roller bearings
NTN T6 Peek cage for NN bearings
SNR T04 Insert bearings for operating temperatures up to - 40° C
SNR T20 Insert bearings for operating temperatures up to +200°C
NTN U Through hardened version for tapered roller bearings
NTN UA Double row spherical roller bearings for vibrating applications
NTN UP Ultra precision
SNR V Internal design for double row spherical roller bearings
NTN V Full complement cylindrical rollers bearings without cage
NTN Vn Specific: groups the other suffixes (n = 1, 2, 3...)
NTN VS1, VS2 Special tolerance for screen bearings
NTN W3 Bearing housing with standard type set screw
NTN W5 Bearing housing with cap head type set screw alternative to W3
NTN W6 Bearing housing with special type set screw alternative to W5
SNR W33 Groove and grease holes on outer ring
NTN Xn Special chamfer n:1,2…
SNR Y Pressed brass cage for thin section ball bearings
NTN Z Plummer block with Z type rubber seal
NTN / SNR Z Single sided protection flange
NTN Z2 Plummer block with felt seal
NTN / SNR ZZ Double sided protection flange
NTN ZA, ZZA Removable shield(s)
NTN Z1, ZZ1 Stainless steel shield(s)
NTN 2AS Grease: Shell/Alvania Grease S2 (-25 to +120°C)
NTN 3AS Grease: Shell/Alvania Grease S3 (-25 to +135°C)
NTN -3, -2, -0 Precisions in compliance with the AFBMA standards for tapered rollers in inches
NTN 5C Grease: Chevron/SRI-2 (-29 to +177°C)
NTN 5K Grease: Kyodo Yushi/Multemp SRL (-40 to +150°C)
NTN 5S Grease: Shell/Aero Shell Grease 7 (-73 +149°C)
NTN 6K Grease: Kluber/Isoflex Super LDS 18 (-60 to +130°C)