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    SDM40GA 40mm Linear Ball Bushing

    40mm ball bearings of metric size are for sale. They are a kind of metal linear moving system that is used for infinite travel with cylindrical shaft. Since steel balls are in point contact with the shaft, the friction resistance is small, suitable for low-load and high speed movement. Economical, easy to maintain and replace.
    This product has a minimum quantity of 5
    30-day Returns
    Delivery date: 6-12 days

    This linear ball bearing is a type of rolling element designed to provide free motion in one direction. Little frictional resistance between the steel ball and the shaft ensures smooth movement with high precision and good linear guiding.


    SDM type dimension

    Nominal shaft diameter Resin retainer Major dimensions and tolerance
    SDM Ball circuit Weight SDM...AJ Ball circuit Weight SDM...OP Ball circuit Weight dr Tolerance
    Precision High
    16mm SDM16GM 4 76g LM16UU-AJ 4 75g SDM16OP 3 58g 16mm 0
    20mm SDM20GM 5 100g LM20UU-AJ 5 98g SDM20OP 4 79g 20mm 0
    25mm SDM25GM 6 240g LM25UU-AJ 6 237g SDM25OP 5 203g 25mm
    30mm SDM30GM 6 270g LM30UU-AJ 6 262g SDM30OP 5 228g 30mm
    35mm SDM35GM 6 425g LM35UU-AJ 6 420g SDM35OP 5 355g 35mm 0
    40mm SDM40GM 6 654g LM40UU-AJ 6 640g SDM40OP 5 546g 40mm
    50mm SDM50GM 6 1700g LM50UU-AJ 6 1680g SDM50OP 5 1420g 50mm
    60mm SDM60GM 6 2000g LM60UU-AJ 6 1980g SDM60OP 5 1650g 60mm 0
    80mm SDM80GM 6 4520g LM80UU-AJ 6 4400g SDM80OP 5 3750g 80mm
    100mm SDM100GM 6 8600g LM100UU-AJ 6 8540g SDM100OP 5 7200g 100mm 0


    Major dimensions and tolerance Eccentricity Radial clearance (Max) Basic load rating
    D L B W D1 h h1 θ
    mm Tolerance mm Tolerance mm Tolerance Precision High Dynamic  Static
    28 0
    37 0
    26.5 0
    1.6mm 27mm 1.5mm 11mm 80° 8μm 12μm -6μm 774c N 1180co N
    32 0
    42 30.5 1.6mm 30.5mm 1.5mm 11mm 60° 10μm 15μm 882cN 1370co N
    40 59 0
    41 0
    1.85mm 38mm 2mm 12mm 50° 980c N 1570co N
    45 64 44.5 1.85mm 43mm 2.5mm 15mm 50° -8μm 1570c N 2740co N
    52 0
    70 49.5 2.1mm 49mm 2.5mm 17mm 50° 12μm 20μm 1670c N 3140co N
    60 80 60.5 2.1mm 57mm 3mm 20mm 50° -10μm 2160c N 4020co N
    80 100 74 2.6mm 76.5mm 3mm 25mm 50° -13μm 3820c N 7940co N
    90 0
    110 85 3.15mm 86.5mm 3mm 30mm 50° 17μm 25μm 4700c N 10000co N
    120 140 0
    105.5 0
    4.15mm 116mm 3mm 40mm 50° -20μm 7350c N 16000co N
    150 0
    175 125.5 4.15mm 145mm 3mm 50mm 50° 20μm 30μm 14100c N 34800co N

    Tips: Differences between Bearings and Bushings

    There is little difference between both items actually. A bushing is type of bearing. A bearing is generally engineered to realize smooth and highly-repeated movement between two components while minimizing friction. Featuring simple mechanism, a bearing typically has two surfaces rolling over each other, resulting in frictionless movement between two mating parts.

    Bearings are broadly classified into linear bearings, radial bearings and thrust bearing, based on whether they are working with rotational or linear motion.

    A bushing is a bearing specifically designed for certain applications.

    In summary, a bushing is a bearing, but a bearing is not always a bushing.

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