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Knuckle Joints

A knuckle joint is a type of pin joint used to join two components that are loaded in tension. One component has a fork with a hole passing through both sides, forming a double eye, while the other component has a single eye. The single eye is inserted between the double eyes so that all three holes are concentric and a pin is used to secure the components. Knuckle joints are often used to connect rods subjected to tension in structures such as roof ties, bridges, and cranes. The links of a chain are also considered a series of knuckle joints. Simplicity means that knuckle joints are easily manufactured while being strong and rigid under tension loads. They’re also easily assembled and disassembled.
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  • You can add up to 6 items per a category to the compare list.
    Sale
    Knuckle Joint for Air Cylinder CJ2/CM2/CG1/CQ2 Series
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Knuckle Joint for Air Cylinder CJ2/CM2/CG1/CQ2 Series

    SMC

    Knuckle joint for air cylinder CJ2/CM2/CG1 series and compact cylinder CQ2 series.

    [Please refer to the followings for the catalog]
    p. 63, CJ2 series
    pp. 189 and 190, CM2 series
    pp. 309 and 309-1, CG1 series
    p. 796, CQ2 series
    From: ฿ 56.95
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    Knuckle Joint for Air Cylinder, MB/MB1/MNB Series
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Knuckle Joint for Air Cylinder, MB/MB1/MNB Series

    SMC

    - Knuckle Joint for Air Cylinder, MB/MB1/MNB Series
    - CD-M, I-0, IY and Y-_M are in the SMC Accessory Bracket series.
    - Type: Single Knuckle Joint, Double Knuckle Joint, Double Clevis Pin and Double Knuckle Pin.
    - Material: Rolled steel, Free cutting sulfur steel, Cast iron and Carbon steel.
    - Knuckle joints are commonly utilized in mechanisms requiring controlled rotational movement.
    - How to select Knuckle Joints for use please check with SMC and Misumi catalog.
    From: ฿ 471.75
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    Knuckle Joint for Air Cylinder CS1, CNS, CLS Series
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Knuckle Joint for Air Cylinder CS1, CNS, CLS Series

    SMC

    - Knuckle Joint for Air Cylinder CS1, CNS, CLS Series
    - I, IY-_ and Y are in type of SMC Accessory Bracket.
    - Body Material: Cast Iron .
    - Thread Size(M): 30, 36, 40, 45, 56 and 64 mm.
    - Applicable bore sizes: 125, 140, 160, 180, 180, 180, 180-200, 200, 250 and 300 mm.
    - Use a single knuckle joint or a double knuckle joint individually.
    - How to select Knuckle Joints for use please check with SMC and Misumi catalog.
    From: ฿ 2,490.50
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    Double Notched Knuckle Joint for SCM
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Double Notched Knuckle Joint for SCM

    CKD

    Mounting bracket for mounting objects on the cylinder.
    [Features]
    · Available as double notched knuckle.
    [Applications]
    · For SCM series.
    From: ฿ 454.73
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    Adaptation of Auxiliary Drive (Rod Tip) Double Knuckle Joint ACQ Series Cylinder
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Adaptation of Auxiliary Drive (Rod Tip) Double Knuckle Joint ACQ Series Cylinder

    AIRTAC

    Compatible with auxiliary drive (rod tip) double knuckle joint ACQ series cylinder manufactured by AirTAC which is well known for its high quality.
    From: ฿ 112.72
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    Double Notched Knuckle Metal Joint for SCA2/JSC3/USC/HCA
    Until 31/03/2025

    Sale
    Until 31/03/2025

    Double Notched Knuckle Metal Joint for SCA2/JSC3/USC/HCA

    CKD

    Mounting bracket for mounting objects on the cylinder.
    [Features]
    · Available as double notched knuckle.
    · For SCA2, JSC3, USC and HCA series.
    · Material: cast iron (painted).
    [Applications]
    · Ideal for mounting on a cylinder rod.
    From: ฿ 590.42
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    RS PRO Rear Clevis, To Fit 40mm Bore Size
    Until 30/09/2024

    Sale
    Until 30/09/2024

    RS PRO Rear Clevis, To Fit 40mm Bore Size

    RS Pro

    Specifications
    Manufacturer Series = CERF
    To Fit Bore Size = 40mm
    Product Type = Rear Clevis
    From: ฿ 1,214.13
    Special Price
    Days to Ship: day to ship 8 Day(s)
    day to ship 8 Day(s)
  • You can add up to 6 items per a category to the compare list.
    Sale
    SSD Fitting - Single Peaked Knuckle Joint
    Until 31/03/2025

    Sale
    Until 31/03/2025

    SSD Fitting - Single Peaked Knuckle Joint

    CKD

    Single clevis knuckle joint for cylinder SSD.
    From: ฿ 310.45
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    SSD Double Clevis Knuckle Joint
    Until 31/03/2025

    Sale
    Until 31/03/2025

    SSD Double Clevis Knuckle Joint

    CKD

    Mounting bracket to be attached to the cylinder.
    [Features]
    ·Available as a double knuckle joint (Y/Y2).
    [Applications]
    ·For SSD series.
    From: ฿ 590.42
    Special Price
    Days to Ship: day to ship Same day
    day to ship Same day
  • You can add up to 6 items per a category to the compare list.
    Sale
    RS PRO Clevis Rod Cylinder, To Fit 12mm Bore Size
    Until 30/09/2024

    Sale
    Until 30/09/2024

    RS PRO Clevis Rod Cylinder, To Fit 12mm Bore Size

    RS Pro

    Specifications
    To Fit Bore Size = 12mm
    Product Type = Yoke
    From: ฿ 248.32
    Special Price
    Days to Ship: day to ship 8 Day(s)
    day to ship 8 Day(s)
Brand
Product Series
CAD
From
Days to Ship
Mounting Method
Thread Size M(mm)
Type
Thread Pitch(mm)
Material
Accessories Included
You can add up to 6 items per a category to the compare list.
Sale
Knuckle Joint for Air Cylinder CJ2/CM2/CG1/CQ2 Series
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
Knuckle Joint for Air Cylinder, MB/MB1/MNB Series
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
Knuckle Joint for Air Cylinder CS1, CNS, CLS Series
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
Double Notched Knuckle Joint for SCM
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
Adaptation of Auxiliary Drive (Rod Tip) Double Knuckle Joint ACQ Series Cylinder
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
Double Notched Knuckle Metal Joint for SCA2/JSC3/USC/HCA
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
RS PRO Rear Clevis, To Fit 40mm Bore Size
Until 30/09/2024
You can add up to 6 items per a category to the compare list.
Sale
SSD Fitting - Single Peaked Knuckle Joint
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
SSD Double Clevis Knuckle Joint
Until 31/03/2025
You can add up to 6 items per a category to the compare list.
Sale
RS PRO Clevis Rod Cylinder, To Fit 12mm Bore Size
Until 30/09/2024
Brand

SMC

SMC

SMC

CKD

AIRTAC

CKD

RS Pro

CKD

CKD

RS Pro

Product Series

Knuckle Joint for Air Cylinder CJ2/CM2/CG1/CQ2 Series

Knuckle Joint for Air Cylinder, MB/MB1/MNB Series

Knuckle Joint for Air Cylinder CS1, CNS, CLS Series

Double Notched Knuckle Joint for SCM

Adaptation of Auxiliary Drive (Rod Tip) Double Knuckle Joint ACQ Series Cylinder

Double Notched Knuckle Metal Joint for SCA2/JSC3/USC/HCA

RS PRO Rear Clevis, To Fit 40mm Bore Size

SSD Fitting - Single Peaked Knuckle Joint

SSD Double Clevis Knuckle Joint

RS PRO Clevis Rod Cylinder, To Fit 12mm Bore Size

CAD
  • 2D / 3D
  • 2D / 3D
From

฿ 56.95

Special Price

On Sale Until 31/03/2025

฿ 471.75

Special Price

On Sale Until 31/03/2025

฿ 2,490.50

Special Price

On Sale Until 31/03/2025

฿ 454.73

Special Price

On Sale Until 31/03/2025

฿ 112.72

Special Price

On Sale Until 31/03/2025

฿ 590.42

Special Price

On Sale Until 31/03/2025

฿ 1,214.13

Special Price

On Sale Until 30/09/2024

฿ 310.45

Special Price

On Sale Until 31/03/2025

฿ 590.42

Special Price

On Sale Until 31/03/2025

฿ 248.32

Special Price

On Sale Until 30/09/2024

Days to Ship Same day Same day Same day Same day Same day Same day 8 Day(s) Same day Same day 8 Day(s)
Mounting MethodTappedTappedTappedTapped---Tapped--
Thread Size M(mm)5 ~ 2214 ~ 2730 ~ 45M18M6M18-M10M14-
TypeSingle Notched Knuckle Joints / Double Notched Knuckle Joints / AccessoriesSingle Notched Knuckle Joints / Double Notched Knuckle JointsSingle Notched Knuckle Joints / Double Notched Knuckle JointsDouble Notched Knuckle JointsDouble Notched Knuckle JointsDouble Notched Knuckle Joints-Single Notched Knuckle JointsDouble Notched Knuckle Joints-
Thread Pitch(mm)0.8 ~ 1.51.5 ~ 21.51.511.5-1.251.5-
MaterialSteel / Cast IronSteelCast IronCast Iron-Cast Iron----
Accessories IncludedIncluded / Not IncludedIncluded / Not IncludedIncluded / Not IncludedIncluded-Included-Not IncludedNot Included-

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  1. 1

Application example related to this category

Related Categories to Knuckle Joints

FAQ Knuckle Joints

Question: In what applications are knuckle joints typically used?
Answer: knuckle joints are commonly utilized in mechanisms requiring controlled rotational movement. They find applications in steering systems for automobiles and aircraft, allowing for precise direction control. In industrial machinery, such as cranes and robotic arms, knuckle joints facilitate movement in specific directions, enhancing versatility. Moreover, they play a vital role in construction equipment like excavators and loaders, ensuring efficient operation. Additionally, knuckle joints feature prominently in material handling systems and medical devices, providing flexibility and controlled articulation for various functions in engineering work.
Question: What materials are commonly used for knuckle joints?
Answer: Knuckle joints, vital for controlled rotational movement, utilize diverse materials based on specific needs. Steel, including carbon, alloy, and stainless variants, offers durability and corrosion resistance, fitting for industrial applications. Aluminum alloys balance strength and lightness, favored in aerospace and automotive sectors. Brass and bronze, prized for corrosion resistance and malleability, find use in architectural and heavy-duty contexts. Titanium's exceptional strength-to-weight ratio and corrosion resistance suit aerospace and high-performance machinery. Material selection hinges on factors like strength, weight, corrosion resistance, and environmental conditions, ensuring optimal functionality in diverse applications.
Question: How do you maintain a knuckle joint?
Answer: Maintaining a knuckle joint involves routine checks and actions to ensure its smooth operation and longevity. First, inspect the joint regularly for wear, damage, or misalignment. Clean the joint to remove dirt and debris that can cause friction and premature wear. Apply lubrication as recommended by the manufacturer to reduce friction and prevent corrosion. Tighten any loose fasteners to maintain structural integrity. Replace worn or damaged components promptly to prevent further issues. Finally, conduct operational tests to verify proper functionality. By following these steps, you can ensure the knuckle joint operates effectively and safely, extending its service life and minimizing downtime.
Question: How do you determine the correct size of a knuckle joint for a specific application?
Answer: Determining the correct size of a knuckle joint involves a comprehensive assessment of various factors. This includes analyzing the application's load requirements (static and dynamic), considering the necessary range of motion, evaluating environmental conditions, accommodating space limitations, and addressing mounting considerations. applications on industry standards, guidelines, and possibly consultations with experts to ensure the selected size can effectively withstand expected loads and movements while fitting seamlessly into the application's requirements.
Question: Are there any limitations to using knuckle joints?
Answer: Knuckle joints have limitations, including wear and fatigue over time, particularly under high loads or harsh conditions. They may introduce backlash or play, impacting precision, and improper maintenance or lubrication can hasten wear. The designer must carefully consider these factors when integrating knuckle joints into designs, ensuring optimal performance and longevity.