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BCA
311 · 55 × 120 × 29

Deep groove ball · 311

radial — mediumaxial — low, on both sides
    Drawing of 311: ⌀55 × ⌀120 × 29 mm311
    Fig. 1: 311, 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 311

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

    Bearing BCA 311

    €78.54per piece incl. VAT
    Available to orderThe manager confirms the lead time
    In the cart

    Specifications

    Manufacturer number
    ISO designation
    Equivalents
    5 exact, 37 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
    open, no protection
    Clearance
    normal clearance
    m
    1.5 kg
    MassWeight of the product. Source: supplier data
    01

    Equivalents

    the same size 55 × 120 × 29 from other brands

    44 products
    Drawing: 311
    You are viewingBCA 311
    €78.54baseline for the price comparison

    Everything the number specifies matches: series 3, 55 × 120 × 29 mm, open, no protection, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the BCA catalogue.

    • Series illustration (not a photo of this item): 63116311CT55 × 120 × 29475 pcs€4.68−€73.86
    • Series illustration (not a photo of this item): 63116311KG55 × 120 × 2914 pcs€6.50−€72.04
    • Series illustration (not a photo of this item): 63116311NTE55 × 120 × 2994 pcs€8.93−€69.61
    • Photo: 63116311SKF55 × 120 × 2919 pcs€28.10−€50.44
    • Series illustration (not a photo of this item): 63116311DYZV55 × 120 × 29available to orderon request

    Under the price: the difference from the price of this bearing (€78.54).
    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

    About the bearing

    D 120d 55B 29
    d×D×Bsize 55 × 120 × 29mm
    mweight 1.5kg

    Deep groove ball bearing 6311. Under GOST the same bearing is designated 311.

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

    Frequently asked questions

    What is 311?

    It is the same bearing under GOST 3189-89: 311 corresponds to the ISO base 6311. Size 55 × 120 × 29 mm, a full equivalent of 6311.

    Will 311 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

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