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6311 2RS · 55 × 120 × 29

Deep groove ball · 6311 2RS

radial — mediumaxial — low, on both sides
    Drawing of 6311 2RS: ⌀55 × ⌀120 × 29 mm6311 2RS2RS
    Fig. 1: 6311 2RS, end view and section; rolling element geometry per the NSK catalogue. Dimensions in mm

    There is no photo of this product: the 3D model and drawing show the dimensions of 6311 2RS

    Load: radial medium; axial low, on both sidesDeep groove ball

    Bearing CX 6311 2RS

    €17.24per piece incl. VAT
    Available to orderThe manager confirms the lead time
    In the cart

    Specifications

    Manufacturer number
    ISO designation
    GOST number
    Equivalents
    10 exact, 32 approximate
    d
    55 mm
    Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
    D
    120 mm
    Outside diameter DOutside diameter = housing bore. Source: two supplier sources
    B
    29 mm
    Width BRing width. Source: two supplier sources
    Seal
    2RSrubber, both sides
    Clearance
    normal clearance
    C
    71.5 kN
    Basic dynamic load rating CLoad for one million revolutions at 90 % reliability; the L10 life is calculated from it as (C/P)^p. ISO method, manufacturer’s figure: do not carry it over to another brand. Source: supplier data
    C0
    45 kN
    Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
    m
    1.35 kg
    MassWeight of the product. Source: two supplier sources
    01

    Equivalents

    the same size 55 × 120 × 29 from other brands

    44 products
    Photo: 6311 2RS
    You are viewingCX 6311 2RS
    €17.24baseline for the price comparison

    Everything the number specifies matches: series 63, 55 × 120 × 29 mm, contact seals on both sides, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the CX catalogue.

    • Photo: 6311 2RS6311 2RSThis bearingCX55 × 120 × 29available to order€17.24you are here
    • Series illustration (not a photo of this item): 6311 2RS6311 2RSCT55 × 120 × 292,650 pcs€4.53−€12.71
    • Series illustration (not a photo of this item): 6311 2RS6311 2RSNTE55 × 120 × 29138 pcs€10.33−€6.91
    • Photo: 6311 2RSR6311 2RSRFAG55 × 120 × 29100 pcs€29.33+€12.09
    • Series illustration (not a photo of this item): 6311 2RS6311 2RSKoyo55 × 120 × 2911 pcs€35.07+€17.83
    • Photo: 6311 2RS6311 2RSURB55 × 120 × 29available to order€4.50−€12.74
    • Photo: 6311 2RS6311 2RSVBF55 × 120 × 29available to order€11.14−€6.10
    • Photo: 6311 2RS6311 2RSZ&S55 × 120 × 29available to order€13.79−€3.45
    • Series illustration (not a photo of this item): 6311-2RS16311-2RS1SKF55 × 120 × 29available to order€32.98+€15.74
    • Series illustration (not a photo of this item): 6311 2RS6311 2RSKG55 × 120 × 29available to orderon request

    Under the price: the difference from the price of this bearing (€17.24).
    02

    Often bought with this

    shaft snap ring Ø55, bore snap ring Ø120

    2 products
    • Shaft snap ring Ø55CT SEG 55 Z by1000Why it fits: DIN 471 snap ring for a 55 shaft: holds the inner ring on the shaft
      €125.77available to order
    • Bore snap ring Ø120CT SEG 120 W by 100Why it fits: DIN 472 snap ring for a 120 bore: holds the outer ring in the housing
      €65.88available to order
    03

    Details

    what this bearing is, questions

    Where this bearing is fitted

    11 machines2 makesby parts catalogues

    1. Belarus 1221/​1221V (1221.2/​1221V.2/​1221.3/​1221V.3) Belarus same geometry 5 assemblies · 8 pcs per machine

      the machine has A; ours does not; ours: seals on both sides (2RS); in the machine: open

      manufacturer’s catalogue: BELARUS 1221/​1221V. 1221-0000010 KDS. Catalogue of parts and assembly units (RUE MTZ)

    2. T-156B-09-03 (tractor loader) KhTZ same geometry 4 assemblies · 4 pcs per machine

      the machine has A; ours does not; ours: seals on both sides (2RS); in the machine: open

      manufacturer’s catalogue: Tractor loader T-156B-09-03. Operator’s manual

    3. Belarus 1222/​1222V (title page: 1523-0000010 KDS) Belarus same geometry 3 assemblies · 6 pcs per machine

      the machine has A; ours does not; the machine has Sh1; ours does not; ours: seals on both sides (2RS); in the machine: open; ours is P0; the machine takes P6

      manufacturer’s catalogue: BELARUS 1222/​1222V. 1523-0000010 KDS. Catalogue of assembly units and parts, 2009 (RUE MTZ)

    4. Belarus 1523/​1523V/​1523.3 Belarus same geometry 3 assemblies · 3 pcs per machine

      the machine has A; ours does not; ours: seals on both sides (2RS); in the machine: open

      manufacturer’s catalogue: BELARUS 1523/​1523V/​1523.3. 1523-0000010 KDS. Catalogue of assembly units and parts, 2013 (RUE MTZ)

    5. KhTZ-16131, KhTZ-16331 KhTZ same geometry 3 assemblies · 3 pcs per machine

      ours: seals on both sides (2RS); in the machine: open

      manufacturer’s catalogue: Tractors KhTZ-16131, KhTZ-16331. Operator’s manual 161.00.000 RE

    Number in the manufacturer’s catalogue: by GOST (180311) or ISO. “Same geometry” means size and type match; the version is not given in the catalogue.

    About the bearing

    D 120d 55B 29
    d×D×Bsize 55 × 120 × 29mm
    Cdynamic 71.5kN
    C0static 45kN
    mweight 1.35kg

    Deep groove ball bearing 6311-2RS, design 2RS: contact seals on both sides. Under GOST the same bearing is designated 180311.

    C, C₀, m: CX data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

    Frequently asked questions

    How does 2RS differ from ZZ?

    2RS has rubber seals that touch the inner ring and keep out dust and water better, which is the usual choice for field machinery. ZZ has metal shields that do not touch, allow higher speeds, and protect against dirt less well.

    What is 180311?

    It is the same bearing under GOST 3189-89: 18 — contact seals on both sides, 0311 corresponds to the ISO base 6311. Size 55 × 120 × 29 mm, a full equivalent of 6311-2RS.

    Will 6311 2RS C3 fit instead?

    Same size, clearance greater than normal. C3 is used where the bearing runs hot or sits on the shaft with an interference fit. If the old bearing is not marked C3, take this one.

    Can I fit another brand instead of this bearing?

    Without checking, only an exact equivalent: the size, seal, clearance and design match according to the brand’s catalogue. Positions with the same geometry differ in seal, clearance or design, and each one says so in the equivalents block. Load ratings differ between manufacturers, so for a heavily loaded unit compare C.

    How do I get a price and a lead time?

    Press “Request a quote” and send the part number and quantity. We reply with the price, availability and delivery terms for your country.

    04

    By make and unit

    this bearing is fitted in machines of these makes

    05

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