• CKD Free Joint FJ Series (Basic, Foot and Flange Types)
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CKD Free Joint FJ Series (Basic, Foot and Flange Types)

CKD Free Joint FJ Series (Basic, Foot and Flange Types)

Free joints that connect a cylinder rod to the load while absorbing misalignment between the cylinder axis and the guide.

Key features

  • Available as basic type (FJ-0), foot type (FJ-L) and flange type (FJ-F) for rod threads M3 to M45, with an allowable angular offset of ±10° and specified radial eccentricity
  • Codes with a -1.25 suffix are for fine 1.25 mm pitch threads
  • Sizes 30 to 45 are supplied without dust cover
FJ-0-3 Type: Basic type | Rod thread: M3×0.5 | Overall length A (mm): 23 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.019 | Mass (kg): 0.012
FJ-0-4 Type: Basic type | Rod thread: M4×0.7 | Overall length A (mm): 26 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.053 | Mass (kg): 0.012
FJ-0-5 Type: Basic type | Rod thread: M5×0.8 | Overall length A (mm): 31.6 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.121 | Mass (kg): 0.022
FJ-0-6 Type: Basic type | Rod thread: M6×1.0 | Overall length A (mm): 45.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.057
FJ-0-8 Type: Basic type | Rod thread: M8×1.0 | Overall length A (mm): 48.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.061
FJ-0-8-1.25 Type: Basic type | Rod thread: M8×1.25 | Overall length A (mm): 48.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.061
FJ-0-10 Type: Basic type | Rod thread: M10×1.25 | Overall length A (mm): 56.2 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.092
FJ-0-12 Type: Basic type | Rod thread: M12×1.5 | Overall length A (mm): 58 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.12
FJ-0-12-1.25 Type: Basic type | Rod thread: M12×1.25 | Overall length A (mm): 58 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.12
FJ-0-14 Type: Basic type | Rod thread: M14×1.5 | Overall length A (mm): 68.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.22
FJ-0-16 Type: Basic type | Rod thread: M16×1.5 | Overall length A (mm): 84.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.4
FJ-0-18 Type: Basic type | Rod thread: M18×1.5 | Overall length A (mm): 84.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.41
FJ-0-22 Type: Basic type | Rod thread: M22×1.5 | Overall length A (mm): 102.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 0.75
FJ-0-26 Type: Basic type | Rod thread: M26×1.5 | Overall length A (mm): 121.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 1.5
FJ-0-30 Type: Basic type | Rod thread: M30×1.5 | Overall length A (mm): 145.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 3.1
FJ-0-36 Type: Basic type | Rod thread: M36×1.5 | Overall length A (mm): 163.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 4.6
FJ-0-40 Type: Basic type | Rod thread: M40×1.5 | Overall length A (mm): 170.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 4.7
FJ-0-45 Type: Basic type | Rod thread: M45×1.5 | Overall length A (mm): 199.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 7.0
FJ-L-8 Type: Foot type | Rod thread: M8×1.0 | Overall length A (mm): 54.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.1
FJ-L-8-1.25 Type: Foot type | Rod thread: M8×1.25 | Overall length A (mm): 54.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.1
FJ-L-10 Type: Foot type | Rod thread: M10×1.25 | Overall length A (mm): 64.5 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.18
FJ-L-12 Type: Foot type | Rod thread: M12×1.5 | Overall length A (mm): 64.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-L-12-1.25 Type: Foot type | Rod thread: M12×1.25 | Overall length A (mm): 64.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-L-14 Type: Foot type | Rod thread: M14×1.5 | Overall length A (mm): 95.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.43
FJ-L-16 Type: Foot type | Rod thread: M16×1.5 | Overall length A (mm): 140.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.4
FJ-L-18 Type: Foot type | Rod thread: M18×1.5 | Overall length A (mm): 140.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-L-22 Type: Foot type | Rod thread: M22×1.5 | Overall length A (mm): 163.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 2.1
FJ-L-26 Type: Foot type | Rod thread: M26×1.5 | Overall length A (mm): 179.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 2.9
FJ-L-30 Type: Foot type | Rod thread: M30×1.5 | Overall length A (mm): 217.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 5.6
FJ-L-36 Type: Foot type | Rod thread: M36×1.5 | Overall length A (mm): 254.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 8.9
FJ-L-40 Type: Foot type | Rod thread: M40×1.5 | Overall length A (mm): 254.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 8.8
FJ-L-45 Type: Foot type | Rod thread: M45×1.5 | Overall length A (mm): 294 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 13.2
FJ-F-8 Type: Flange type | Rod thread: M8×1.0 | Overall length A (mm): 35.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.11
FJ-F-8-1.25 Type: Flange type | Rod thread: M8×1.25 | Overall length A (mm): 35.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.11
FJ-F-10 Type: Flange type | Rod thread: M10×1.25 | Overall length A (mm): 43.2 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.18
FJ-F-12 Type: Flange type | Rod thread: M12×1.5 | Overall length A (mm): 43.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-F-12-1.25 Type: Flange type | Rod thread: M12×1.25 | Overall length A (mm): 43.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-F-14 Type: Flange type | Rod thread: M14×1.5 | Overall length A (mm): 57.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.56
FJ-F-16 Type: Flange type | Rod thread: M16×1.5 | Overall length A (mm): 71.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-F-18 Type: Flange type | Rod thread: M18×1.5 | Overall length A (mm): 71.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-F-22 Type: Flange type | Rod thread: M22×1.5 | Overall length A (mm): 87.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 1.9
FJ-F-26 Type: Flange type | Rod thread: M26×1.5 | Overall length A (mm): 101.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 2.8
FJ-F-30 Type: Flange type | Rod thread: M30×1.5 | Overall length A (mm): 120.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 5.6
FJ-F-36 Type: Flange type | Rod thread: M36×1.5 | Overall length A (mm): 135 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 9.4
FJ-F-40 Type: Flange type | Rod thread: M40×1.5 | Overall length A (mm): 135 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 9.3
FJ-F-45 Type: Flange type | Rod thread: M45×1.5 | Overall length A (mm): 159 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 13.4
Floating JointsCKD
46 product codes available in this family
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CKD Free Joint FJ Series (Basic, Foot and Flange Types)

Brand CKD·Floating Joints

Available part numbers (46)

FJ-0-3, FJ-0-4, FJ-0-5, FJ-0-6, FJ-0-8, FJ-0-8-1.25, FJ-0-10, FJ-0-12, FJ-0-12-1.25, FJ-0-14 + 36 more — see full table ↓

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Product codes & specifications
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Product codeSpec
FJ-0-3Type: Basic type | Rod thread: M3×0.5 | Overall length A (mm): 23 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.019 | Mass (kg): 0.012
FJ-0-4Type: Basic type | Rod thread: M4×0.7 | Overall length A (mm): 26 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.053 | Mass (kg): 0.012
FJ-0-5Type: Basic type | Rod thread: M5×0.8 | Overall length A (mm): 31.6 | Allowable eccentricity U (mm): 0.5 | Max. tensile/compressive force (kN): 0.121 | Mass (kg): 0.022
FJ-0-6Type: Basic type | Rod thread: M6×1.0 | Overall length A (mm): 45.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.057
FJ-0-8Type: Basic type | Rod thread: M8×1.0 | Overall length A (mm): 48.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.061
FJ-0-8-1.25Type: Basic type | Rod thread: M8×1.25 | Overall length A (mm): 48.4 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.061
FJ-0-10Type: Basic type | Rod thread: M10×1.25 | Overall length A (mm): 56.2 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.092
FJ-0-12Type: Basic type | Rod thread: M12×1.5 | Overall length A (mm): 58 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.12
FJ-0-12-1.25Type: Basic type | Rod thread: M12×1.25 | Overall length A (mm): 58 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.12
FJ-0-14Type: Basic type | Rod thread: M14×1.5 | Overall length A (mm): 68.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.22
FJ-0-16Type: Basic type | Rod thread: M16×1.5 | Overall length A (mm): 84.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.4
FJ-0-18Type: Basic type | Rod thread: M18×1.5 | Overall length A (mm): 84.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.41
FJ-0-22Type: Basic type | Rod thread: M22×1.5 | Overall length A (mm): 102.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 0.75
FJ-0-26Type: Basic type | Rod thread: M26×1.5 | Overall length A (mm): 121.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 1.5
FJ-0-30Type: Basic type | Rod thread: M30×1.5 | Overall length A (mm): 145.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 3.1
FJ-0-36Type: Basic type | Rod thread: M36×1.5 | Overall length A (mm): 163.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 4.6
FJ-0-40Type: Basic type | Rod thread: M40×1.5 | Overall length A (mm): 170.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 4.7
FJ-0-45Type: Basic type | Rod thread: M45×1.5 | Overall length A (mm): 199.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 7.0
FJ-L-8Type: Foot type | Rod thread: M8×1.0 | Overall length A (mm): 54.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.1
FJ-L-8-1.25Type: Foot type | Rod thread: M8×1.25 | Overall length A (mm): 54.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.1
FJ-L-10Type: Foot type | Rod thread: M10×1.25 | Overall length A (mm): 64.5 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.18
FJ-L-12Type: Foot type | Rod thread: M12×1.5 | Overall length A (mm): 64.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-L-12-1.25Type: Foot type | Rod thread: M12×1.25 | Overall length A (mm): 64.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-L-14Type: Foot type | Rod thread: M14×1.5 | Overall length A (mm): 95.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.43
FJ-L-16Type: Foot type | Rod thread: M16×1.5 | Overall length A (mm): 140.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 0.4
FJ-L-18Type: Foot type | Rod thread: M18×1.5 | Overall length A (mm): 140.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-L-22Type: Foot type | Rod thread: M22×1.5 | Overall length A (mm): 163.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 2.1
FJ-L-26Type: Foot type | Rod thread: M26×1.5 | Overall length A (mm): 179.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 2.9
FJ-L-30Type: Foot type | Rod thread: M30×1.5 | Overall length A (mm): 217.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 5.6
FJ-L-36Type: Foot type | Rod thread: M36×1.5 | Overall length A (mm): 254.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 8.9
FJ-L-40Type: Foot type | Rod thread: M40×1.5 | Overall length A (mm): 254.5 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 8.8
FJ-L-45Type: Foot type | Rod thread: M45×1.5 | Overall length A (mm): 294 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 13.2
FJ-F-8Type: Flange type | Rod thread: M8×1.0 | Overall length A (mm): 35.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.11
FJ-F-8-1.25Type: Flange type | Rod thread: M8×1.25 | Overall length A (mm): 35.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 1.08 | Mass (kg): 0.11
FJ-F-10Type: Flange type | Rod thread: M10×1.25 | Overall length A (mm): 43.2 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.18
FJ-F-12Type: Flange type | Rod thread: M12×1.5 | Overall length A (mm): 43.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-F-12-1.25Type: Flange type | Rod thread: M12×1.25 | Overall length A (mm): 43.6 | Allowable eccentricity U (mm): 0.75 | Max. tensile/compressive force (kN): 2.45 | Mass (kg): 0.19
FJ-F-14Type: Flange type | Rod thread: M14×1.5 | Overall length A (mm): 57.5 | Allowable eccentricity U (mm): 1.0 | Max. tensile/compressive force (kN): 5.88 | Mass (kg): 0.56
FJ-F-16Type: Flange type | Rod thread: M16×1.5 | Overall length A (mm): 71.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-F-18Type: Flange type | Rod thread: M18×1.5 | Overall length A (mm): 71.2 | Allowable eccentricity U (mm): 1.5 | Max. tensile/compressive force (kN): 10.8 | Mass (kg): 1.1
FJ-F-22Type: Flange type | Rod thread: M22×1.5 | Overall length A (mm): 87.5 | Allowable eccentricity U (mm): 2.0 | Max. tensile/compressive force (kN): 17.6 | Mass (kg): 1.9
FJ-F-26Type: Flange type | Rod thread: M26×1.5 | Overall length A (mm): 101.6 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 27.5 | Mass (kg): 2.8
FJ-F-30Type: Flange type | Rod thread: M30×1.5 | Overall length A (mm): 120.2 | Allowable eccentricity U (mm): 3.0 | Max. tensile/compressive force (kN): 60.8 | Mass (kg): 5.6
FJ-F-36Type: Flange type | Rod thread: M36×1.5 | Overall length A (mm): 135 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 9.4
FJ-F-40Type: Flange type | Rod thread: M40×1.5 | Overall length A (mm): 135 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 87.3 | Mass (kg): 9.3
FJ-F-45Type: Flange type | Rod thread: M45×1.5 | Overall length A (mm): 159 | Allowable eccentricity U (mm): 4.0 | Max. tensile/compressive force (kN): 108 | Mass (kg): 13.4

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