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21311 EK · 55 × 120 × 29

Spherical roller · 21311 EK

radial — highaxial — medium, on both sides
    Drawing of 21311 EK: ⌀55 × ⌀120 × 29 mm⌀120⌀552921311 EK
    Fig. 1: 21311 EK, end view and section; internal parts simplified per ISO 8826-1. Dimensions in mm

    There is no photo of this product: the 3D model and drawing show the dimensions of 21311 EK

    Load: radial high; axial medium, on both sidesSpherical roller

    Bearing SKF 21311 EK

    Price on request
    Available to order
    Request a quoteIn the cart: send the request

    Specifications

    Manufacturer number
    ISO designation
    Equivalents
    1 exact, 10 approximate
    d
    55 mm
    Bore diameter dBearing bore = shaft diameter. Source: supplier data
    D
    120 mm
    Outside diameter DOutside diameter = housing bore. Source: supplier data
    B
    29 mm
    Width BRing width. Source: supplier data
    Seal
    open, no protection
    Clearance
    normal clearance
    C
    159 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
    01

    Equivalents

    the same size 55 × 120 × 29 from other brands

    11 products
    Series illustration (not a photo of this item): 21311 EK
    You are viewingSKF 21311 EK

    Same size, different design: the difference is written in the row.

    • Photo: 21311 CC K21311 CC Kpressed cage, 1:12 tapered boreSKF55 × 120 × 29available to order€123.06
    • Series illustration (not a photo of this item): 21311 CA W3321311 CA W33CA, lubrication groove and holesno brand55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311 MW3321311 MW33M, lubrication groove and holesno brand55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311 K CA W3321311 K CA W33CA, lubrication groove and holes, 1:12 tapered boreIBB55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311 CW33C321311 CW33C3clearance C3, CW33KG55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311EAE4 *H* 521311EAE4 *H* 55, EA, H, lubrication groove and holesNSK55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311EAKE4 *H* 521311EAKE4 *H* 55, EA, H, lubrication groove and holes, 1:12 tapered boreNSK55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311CW3321311CW33CW33NTE55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311 E21311 EESKF55 × 120 × 29available to orderon request
    • Series illustration (not a photo of this item): 21311 E/C321311 E/C3clearance C3, ESKF55 × 120 × 29available to orderon request
    02

    Often bought with this

    adapter sleeve H311, lock nut M55×2, lock washer MB11, bore snap ring Ø120

    7 products
    • Adapter sleeve H311CT H 311 WITH BLACK KMWhy it fits: H311 for 21311 K: 1:12 taper, bore 55 for shaft 50 (Koyo, p. 156)
      €2.1312 pcs
    • Adapter sleeve H311CT H 311 SILVERWhy it fits: H311 for 21311 K: 1:12 taper, bore 55 for shaft 50 (Koyo, p. 156)
      €2.65available to order
    • Lock nut M55×2CT KM 11 SILVERWhy it fits: KM11 is the nut for sleeve H311: thread M55×2
      €1.11786 pcs
    • Lock nut M55×2KM 11Why it fits: KM11 is the nut for sleeve H311: thread M55×2
      Price to be confirmedavailable to order
    • Lock washer MB11CT MB 11Why it fits: MB11 locks the KM11 nut (ISO 2982-2)
      €0.29950 pcs
    • Lock washer MB11MB 11Why it fits: MB11 locks the KM11 nut (ISO 2982-2)
      Price to be confirmedavailable 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

    4 machines1 makeby parts catalogues

    1. KhTZ-242K.20 KhTZ check the version 4 assemblies · 4 pcs per machine

      not decoded: mark “KG” in the machine catalogue; not set by the number: sealing, clearance, precision class

      manufacturer’s catalogue: Tractor KhTZ-242K.20. Operator’s manual

    2. KhTZ-243K.20 KhTZ check the version 4 assemblies · 4 pcs per machine

      not decoded: mark “KG” in the machine catalogue; not set by the number: sealing, clearance, precision class

      manufacturer’s catalogue: Tractor KhTZ-243K.20. Operator’s manual

    3. KhTZ-17021, KhTZ-17221 KhTZ check the version 2 assemblies · 2 pcs per machine

      not decoded: mark “KG” in the machine catalogue; not set by the number: sealing, clearance, precision class

      manufacturer’s catalogue: Tractors KhTZ-17021 and KhTZ-17221. Operator’s manual 170.00.000 RE

    4. T-150K (KhTZ-150K-09-25) KhTZ check the version 2 assemblies · 2 pcs per machine

      not decoded: mark “KG” in the machine catalogue; not set by the number: sealing, clearance, precision class

      manufacturer’s catalogue: Tractor KhTZ-150K-09-25. Operator’s manual 151.00.000-09-25 RE

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

    About the bearing

    d×D×Bsize 55 × 120 × 29mm
    Cdynamic 159kN

    Spherical roller bearing 21311 K.

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

    Frequently asked questions

    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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