McMaster-Carr logo
    Filter by
    Thickness
    Shape
    System of Measurement
    Sold As
    DFARS Specialty Metals
    Shaft Type
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Passivation
    Specifications Met
    Shaft Diameter
    Attribute Image
    Keyway Type
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    42 Products

    Shims

    Image of Product. Front orientation. Shims. Round, Sold Individually.
    With thickness tolerances as fine as a strand of hair, these shims precisely align, space, and level components on shafts, arbors, and machinery.
    You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Super-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these shims won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Brass—With a warm, polished look, these shims are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments.
    Copper—Good conductors of heat, these shims are often used when installing heat sinks. As our softest metal shims, they prevent damage to equipment and components but may not retain their shape as well as other metal shims.
    Thk.
    Thk. Tolerance
    ID
    Tolerance
    OD Tolerance
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/4" ID × 3/8" OD
    0.09"-0.002" to 0.002"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A902000000
     
    11/32" ID × 13/16" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401098126A7820000
     
    3/8" ID × 5/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401098126A78500000
     
    1/2" ID × 3/4" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401098126A78800000
     
    5/8" ID × 1" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A79100000
     
    3/4" ID × 1 1/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A79400000
     
    7/8" ID × 1 3/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A79700000
     
    1" ID × 1 1/2" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A80000000
     
    1 1/8" ID × 1 5/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240598126A80300000
     
    1 1/4" ID × 1 3/4" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240198126A8060000
     
    1 3/8" ID × 1 7/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240198126A8090000
     
    1 1/2" ID × 2 1/8" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240198126A8120000
     
    1 3/4" ID × 2 3/4" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240198126A8150000
     
    2" ID × 2 3/4" OD
    0.09"-0.005" to 0.005"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240198126A8180000
     
    Super-Corrosion-Resistant 316 Stainless Steel
     
    1/4" ID × 3/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A60500000
     
    11/32" ID × 13/16" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A2401097022A22300000
     
    3/8" ID × 5/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A22500000
     
    1/2" ID × 3/4" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A24600000
     
    5/8" ID × 1" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A26700000
     
    3/4" ID × 1 1/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A75800000
     
    7/8" ID × 1 3/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A7630000
     
    1" ID × 1 1/2" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240197022A7790000
     
    1 1/8" ID × 1 5/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A8220000
     
    1 1/4" ID × 1 3/4" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A82500000
     
    1 3/8" ID × 1 7/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A82900000
     
    1 1/2" ID × 2 1/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240597022A83300000
     
    1 3/4" ID × 2 3/4" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240197022A8370000
     
    2" ID × 2 3/4" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Rockwell B70ASTM A240197022A8400000
     
    Brass
     
    3/8" ID × 5/8" OD
    0.09"-0.006" to 0.006"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361092678A49400000
     
    1/2" ID × 3/4" OD
    0.09"-0.006" to 0.006"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B361092678A49700000
     
    5/8" ID × 1" OD
    0.09"-0.006" to 0.006"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B36592678A5000000
     
    3/4" ID × 1 1/8" OD
    0.09"-0.006" to 0.006"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B36592678A50300000
     
    1" ID × 1 1/2" OD
    0.09"-0.006" to 0.006"0" to 0.011"-0.002" to 0.002"Rockwell B60ASTM B36192678A5060000
     
    Copper
     
    3/8" ID × 5/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521094397A66600000
     
    1/2" ID × 3/4" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521094397A66900000
     
    5/8" ID × 1" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521094397A67300000
     
    3/4" ID × 1 1/8" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Not RatedASTM B1521094397A67800000
     
    1" ID × 1 1/2" OD
    0.09"-0.008" to 0.008"0" to 0.011"-0.002" to 0.002"Not RatedASTM B152594397A68100000
     

    Shims for Keyed Shafts

    With a notch or tab, these shims fit snugly on keyed shafts to align and space gears, sprockets, and bearings. On keyed arbors, they’re often used to accurately space saw blades and cutters.
    You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.
    Notch
    Image of Product. Front orientation. Shims. For Keyed Shafts, Sold Individually, Round, Notch.
    Fit these shims around keyed shafts and arbors that have a key inserted. They’re often referred to as arbor spacers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
    Notch
    Thk.
    Thk. Tolerance
    ID
    ID
    Tolerance
    OD
    OD Tolerance
    Wd.
    Dp.
    Min.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    For 1" Diameter Shafts
    0.09"-0.005" to 0.005"1"0" to 0.011"1 1/2"-0.002" to 0.002"1/4"3/32"Rockwell B80598116A571000000
     
    For 1 1/4" Diameter Shafts
    0.09"-0.005" to 0.005"1 1/4"0" to 0.011"1 3/4"-0.002" to 0.002"5/16"1/8"Rockwell B80198116A5730000
     
    For 1 1/2" Diameter Shafts
    0.09"-0.005" to 0.005"1 1/2"0" to 0.011"2 1/8"-0.002" to 0.002"3/8"5/32"Rockwell B80198116A5750000
     
    For 2" Diameter Shafts
    0.09"-0.005" to 0.005"2"0" to 0.011"2 3/4"-0.002" to 0.002"1/2"3/16"Rockwell B80198116A5790000
     
    back to top