McMaster-Carr logo
    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)
    72 Products

    Thread-Mount Idler Rotary Shafts

    Image of Product. Tensioner Shown with Idler Shaft (Sold Separately). Front orientation. Idler Shafts. Thread-Mount Idler Rotary Shafts, Shaft Collar End.
    Image of Product. Front orientation. Idler Shafts. Thread-Mount Idler Rotary Shafts, Shaft Collar End.
    Image of Product. Front orientation. Idler Shafts. Thread-Mount Idler Rotary Shafts, Retaining-Ring-Grooves End.

    Tensioner Shown with

    Idler Shaft (Sold

    Separately)

    Shaft Collar End

    Retaining-Ring-Grooves

    End

    Image of Attribute. Side1 orientation. Contains Annotated. Thread-Mount Idler Rotary Shafts, Shaft Collar End.

    Shaft Collar End

    Image of Attribute. Side1 orientation. Contains Annotated. Thread-Mount Idler Rotary Shafts, Retaining-Ring-Grooves End.

    Retaining-Ring-Grooves End

    Thread these shafts into a tapped hole to support idler sprockets and pulleys in tensioning applications.
    Shaft Collar End—Shafts with a shaft collar come with a grease fitting for easy lubrication of your pulleys and sprockets. Adjust the collar to the width of your component.
    Retaining-Ring-Grooves End—Shafts with retaining ring grooves come with a retaining ring and spacers to position your component and hold it in place.
    Overall
    Thread
    Groove
    Dia.
    Lg.
    Lg.
    Dia.
    Size
    Lg.
    Wd.
    Dia.
    End-to-Groove
    Lg.
    Edge
    Type
    Fabrication
    Hardness
    Rating
    Hardness
    Each
    Shaft Collar End—1215 Carbon Steel
    1"1 1/2"3 3/8"1 1/2"3/4"-16
    		7/8"———ChamferedHardenedExtra HardRockwell C581816K3000000
    1"2 1/2"4 3/8"1 1/2"3/4"-16
    		7/8"———ChamferedHardenedExtra HardRockwell C581816K400000
    1"3 1/2"5 3/8"1 1/2"3/4"-16
    		7/8"———ChamferedHardenedExtra HardRockwell C581816K500000
    1 1/2"3 1/4"5 11/16"2 1/4"1"-14
    		1 5/16"———ChamferedHardenedExtra HardRockwell C582435K10400000
    1 1/2"5 1/4"7 11/16"2 1/4"1"-14
    		1 5/16"———ChamferedHardenedExtra HardRockwell C582435K10500000
     
    Retaining-Ring-Grooves End—Zinc-Plated 1215 Carbon Steel
    1"5/8"2"1 1/2"1/2"-13
    		15/16"0.056"0.835"0.125"Chamfered—Not RatedNot Rated2435K600000
     

    Rotary Shafts

    Image of Product. Front orientation. Rotary Shafts.
    Pair with gears, sprockets, and bearings to transmit rotary motion. Turned, ground, and polished to tight tolerances, these shafts reduce vibration, evenly distribute loads, and improve accuracy.
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Chrome-Plated Carbon Steel—The chrome plating creates a hard, protective barrier that withstands moisture. However, it can chip or flake under repeated impact or shock loads.
    Corrosion-Resistant Nitride-Coated Carbon Steel—Combine the strength of steel with the corrosion resistance of stainless steel. The nitride coating resists moisture, oxidation, and mild chemicals, but not salt water or strong acids and alkalis. Unlike chrome plating, it won't flake or chip.
    Material
    Finish
    Lg.
    Straightness
    Tolerance
    Diameter
    Tolerance
    Hardness
    Hardness
    Rating
    Hardness
    Hardness
    Rating
    Each
    Carbon Steel
     
    1 1/2" Diameter
    12"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K532000000
    18"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K53300000
    24"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K534000000
    36"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K535000000
    48"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K536000000
    60"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K537000000
    72"0.012"/1 ft.-0.004" to 0"Rockwell C25Hard——1346K538000000
    120"0.012"/1 ft.-0.002" to 0"Brinell 197Medium——4138N14000000
     
    Chrome-Plated Carbon Steel
     
    1 1/2" Diameter
    12"0.0125"/1 ft.-0.001" to 0"Brinell 203MediumRockwell C68Ultra Hard5947K1900000
    18"0.0125"/1 ft.-0.001" to 0"Brinell 203MediumRockwell C68Ultra Hard5947K3200000
    24"0.0125"/1 ft.-0.001" to 0"Brinell 203MediumRockwell C68Ultra Hard5947K4400000
    36"0.0125"/1 ft.-0.001" to 0"Brinell 203MediumRockwell C68Ultra Hard5947K56000000
    48"0.0125"/1 ft.-0.001" to 0"Brinell 203MediumRockwell C68Ultra Hard5947K68000000
     
    Corrosion-Resistant Nitride-Coated Carbon Steel
     
    1 1/2" Diameter
    12"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K1500000
    18"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K2300000
    24"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K3100000
    36"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K38000000
    48"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K46000000
    60"0.0125"/1 ft.-0.001" to 0"Not RatedNot RatedRockwell C60Extra Hard5936K95000000
     

    Keyed Rotary Shafts

    Match with a machine key to prevent slipping while transmitting torque to gears and other components. Turned, ground, and polished to tight tolerances, these shafts reduce vibration, evenly distribute loads, and improve accuracy.
    Fully Keyed
    Image of Product. Front orientation. Rotary Shafts. Keyed Rotary Shafts, Fully Keyed.
    Image of Attribute. Front orientation. Contains Annotated. Rotary Shafts. Keyed Rotary Shafts, Fully Keyed.
    Mount components anywhere along the length of these shafts. For secure torque transmission, slide a component from either end and lock it into place with an ANSI machine key (sold separately).
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Corrosion-Resistant 304 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. However, these shafts are more difficult to machine than carbon steel shafts.
    Highly Corrosion-Resistant 316 Stainless Steel—More corrosion resistant than 303 and 304 stainless steel shafts. They stand up to salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.
    Keyway
    Material
    Certificate
    Lg.
    Lg.
    Wd.
    Dp.
    ANSI Keys
    Included
    Straightness
    Tolerance
    Dia.
    Tolerance
    Hardness
    Hardness
    Rating
    Type
    Form
    Each
    Carbon Steel
     
    1 1/2" Diameter
    3"3"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K168000000
    6"6"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K16900000
    9"9"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K17200000
    12"12"3/8"3/16"No0.003"/1 ft.-0.001" to 0"Rockwell C14MediumMaterial Certificate
    		Paper
    		8488T14400000
    12"12"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K81100000
    18"18"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K97100000
    24"24"3/8"3/16"No0.003"/1 ft.-0.001" to 0"Rockwell C14MediumMaterial Certificate
    		Paper
    		8488T145000000
    24"24"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K80100000
    36"36"3/8"3/16"No0.003"/1 ft.-0.001" to 0"Rockwell C14MediumMaterial Certificate
    		Paper
    		8488T146000000
    36"36"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K802000000
    48"48"3/8"3/16"No0.003"/1 ft.-0.001" to 0"Rockwell C14MediumMaterial Certificate
    		Paper
    		8488T147000000
    48"48"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K803000000
    60"60"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K804000000
    72"72"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B95Medium——1497K805000000
     
    Corrosion-Resistant 304 Stainless Steel
     
    1 1/2" Diameter
    3"3"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K6500000
    6"6"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K6600000
    9"9"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K6700000
    12"12"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K27000000
    24"24"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K17000000
    36"36"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K37000000
    48"48"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K57000000
    60"60"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K77000000
    72"72"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K97000000
    120"120"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K235000000
    144"144"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7398K236000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    1 1/2" Diameter
    3"3"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K6500000
    6"6"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K6600000
    12"12"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K27000000
    24"24"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K17000000
    36"36"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K37000000
    48"48"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K57000000
    60"60"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K77000000
    72"72"3/8"3/16"No0.013"/1 ft.-0.003" to 0"Rockwell B85Medium——7405K97000000
     
    Partially Keyed
    Image of Product. Front orientation. Rotary Shafts. Keyed Rotary Shafts, Partially Keyed.
    Image of Attribute. Front orientation. Rotary Shafts. Keyed Rotary Shafts, Partially Keyed.

    These shafts combine keyed ends with a plain center for versatile assembly. The keyways on the ends lock with the included ANSI machine keys to transmit torque to components such as gears and sprockets. The plain center fits bearings and other round-bore parts.
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Keyway
    Material
    Lg.
    Lg.
    Wd.
    Dp.
    ANSI Keys Included
    Straightness
    Tolerance
    Dia.
    Tolerance
    Hardness
    Hardness
    Rating
    Each
    Carbon Steel
     
    1 1/2" Diameter
    24"4", 14"3/8", 3/8"3/16", 3/16"One 2" Long Key, One 4" Long Key0.003"/1 ft.-0.002" to 0"Brinell 190Medium6117K1930000000
    36"4", 14"3/8", 3/8"3/16", 3/16"One 2" Long Key, One 4" Long Key0.003"/1 ft.-0.002" to 0"Brinell 190Medium6117K194000000
    48"4", 14"3/8", 3/8"3/16", 3/16"One 2" Long Key, One 4" Long Key0.003"/1 ft.-0.002" to 0"Brinell 190Medium6117K195000000
    60"4", 14"3/8", 3/8"3/16", 3/16"One 2" Long Key, One 4" Long Key0.003"/1 ft.-0.002" to 0"Brinell 190Medium6117K196000000
    72"4", 14"3/8", 3/8"3/16", 3/16"One 2" Long Key, One 4" Long Key0.003"/1 ft.-0.002" to 0"Brinell 190Medium6117K197000000
     

    Splined Rotary Shafts

    Often used in hydraulic and other high-torque applications, these shafts have evenly spaced teeth to transmit heavy rotational loads. They handle more torque and last longer than keyed shafts since they have multiple contact points. Pair them with splined sleeve bushings (sold separately). Compatible bushings and components slide right along the splines, making these shafts a good choice for frequent disassembly and adjustments.
    Fully Parallel Splined
    Image of Product. Front orientation. Rotary Shafts. Splined Rotary Shafts, Fully Parallel Splined.
    Image of Attribute. Front orientation. Contains Annotated. Rotary Shafts. Splined Rotary Shafts, Fully Parallel Splined.
    The large, straight-sided teeth resemble machine keys and transmit more torque than involute-spline teeth. These shafts are fully splined, so you can mount components anywhere along their length.
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Sleeve Bushings—Transmit rotary motion or position loads along a shaft. These bushings also work as couplers—they can join two splined shafts when welded into place.
    Shafts
    Sleeve Bushings
    Material
    Dia.
    Lg.
    No. of
    Splines
    Hardness
    Hardness
    Rating
    Each
    Each
    Carbon Steel
    1 1/2"10"6Not RatedNot Rated4208N1600000004208N570000000
     
    Partially Parallel Splined
    Image of Product. Front orientation. ZoomedIn view. Contains MultipleImages. Rotary Shafts. Splined Rotary Shafts, Partially Parallel Splined.
    Image of Attribute. Front orientation. Contains Annotated. Rotary Shafts. Splined Rotary Shafts, Partially Parallel Splined.
    Image of Attribute. Front orientation. Contains Annotated. Rotary Shafts. Splined Rotary Shafts, Partially Parallel Splined.
    Combine a splined section that handles high torque and a round section for mounting gears, sprockets, and bearings. The parallel splines have large, straight-sided teeth that resemble machine keys and transmit more torque than involute-spline teeth.
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Sleeve Bushings—Transmit rotary motion or position loads along a shaft. These bushings also work as couplers—they can join two splined shafts when welded into place.
    Shafts
    Sleeve Bushings
    Spline
    Material
    Dia.
    Lg.
    No. of
    Splines
    Round
    Diameter
    Lg.
    Hardness
    Hardness
    Rating
    Each
    Each
    Carbon Steel
    1"12"61 1/2"48"Rockwell C15Medium2938N200000004208N52000000
    1 1/2"12"62"48"Rockwell C15Medium2938N30000004208N57000000
     

    D-Profile Rotary Shafts

    Image of Product. Front orientation. ZoomedIn view. Rotary Shafts. D-Profile Rotary Shafts.
    Image of Attribute. Front orientation. Contains Annotated. Rotary Shafts. D-Profile Rotary Shafts.
    Lock gears, sprockets, and bearings in place so they won't slip as these shafts turn. The flat length mates with D-shaped bores for a secure connection while giving set screws an even surface to dig into. Turned, ground, and polished to tight tolerances, these shafts reduce vibration, evenly distribute loads, and improve accuracy.
    Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.
    Material
    Lg.
    Flat
    Wd.
    Straightness
    Tolerance
    Diameter
    Tolerance
    Hardness
    Hardness
    Rating
    Each
    Carbon Steel
     
    1 1/2" Diameter
    12"3/4"0.012"/1 ft.-0.003" to 0"Rockwell B90Medium8632T54000000
    24"3/4"0.012"/1 ft.-0.003" to 0"Rockwell B90Medium8632T5500000
    36"3/4"0.012"/1 ft.-0.003" to 0"Rockwell B90Medium8632T5600000
    48"3/4"0.012"/1 ft.-0.003" to 0"Rockwell B90Medium8632T57000000
     
    back to top