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638 2RS · 8 × 28 × 9

Deep groove ball · 638 2RS

radial — mediumaxial — low, on both sides
    Drawing of 638 2RS: ⌀8 × ⌀28 × 9 mm638 2RS2RS
    Fig. 1: 638 2RS, 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 638 2RS

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

    Bearing CT 638 2RS

    €0.53per piece incl. VAT
    Available to orderThe manager confirms the lead time
    In the cart

    Specifications

    Manufacturer number
    ISO designation
    Equivalents
    1 exact, 0 approximate
    d
    8 mm
    Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
    D
    28 mm
    Outside diameter DOutside diameter = housing bore. Source: two supplier sources
    B
    9 mm
    Width BRing width. Source: two supplier sources
    Seal
    2RSrubber, both sides
    Clearance
    normal clearance
    C
    4.62 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
    1.96 kN
    Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
    m
    0.03 kg
    MassWeight of the product. Source: supplier data
    01

    Equivalents

    the same size 8 × 28 × 9 from other brands

    3 products
    Series illustration (not a photo of this item): 638 2RS
    You are viewingCT 638 2RS
    €0.53baseline for the price comparison

    Not enough data for a firm conclusion: what is missing is written in the row.

    • Series illustration (not a photo of this item): 638 2RS638 2RSdimensions in the data are incompleteno brand? × ? × ?available to orderon request
    • Series illustration (not a photo of this item): 638 2RS638 2RSdimensions in the data are incompleteZEN? × ? × ?available to orderon request

    Under the price: the difference from the price of this bearing (€0.53).
    02

    Often bought with this

    shaft snap ring Ø8, bore snap ring Ø28

    2 products
    • Shaft snap ring Ø8CT SEG 8 Z by1000Why it fits: DIN 471 snap ring for a 8 shaft: holds the inner ring on the shaft
      €5.55available to order
    • Bore snap ring Ø28CT SEG 28 W by 1000Why it fits: DIN 472 snap ring for a 28 bore: holds the outer ring in the housing
      €26.862 pcs
    03

    Details

    what this bearing is, questions

    About the bearing

    D 28d 8B 9
    d×D×Bsize 8 × 28 × 9mm
    Cdynamic 4.62kN
    C0static 1.96kN
    mweight 0.03kg

    Deep groove ball bearing 638-2RS, design 2RS: contact seals on both sides.

    C, C₀, m: CT 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.

    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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