CF-X [OG] Fixed-Length Type

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This design features a backlash-free structure and power transmission via nylon resin elements. This structure is rigid in the torsional direction while offering high flexibility in the lateral and axial directions, enabling precise power transmission while absorbing vibrations and shocks.This type features a floating shaft with a customizable overall length, sandwiched between two CF-X models, allowing for a wider tolerance range.

[Specifications]

Model Torque Tolerance Maximum rotational speed [min⁻¹] Static torsional spring constant [N·m/rad] Moment of inertia [kg·m²] Mass [kg] Price for pre-drilled holes [JPY]
Rated torque [N·m] Maximum [N·m] Eccentricity [mm] Angular Deviation [°] Axial [mm]
CF-X-001-OG 15 30 8.2 1 ±0.5 2000 1.15×10³ 4.4×10⁻⁴ 1.2
CF-X-002-OG 30 60 8.2 1 ±0.5 2000 2.40×10³ 1.6×10⁻³ 2.2
CF-X-004-OG 60 120 8.2 1 ±0.5 2000 6.97×10³ 3.1×10⁻³ 3.1
CF-X-008-OG 120 250 8.1 1 ±0.5 2000 1.75×10⁴ 8.6×10⁻³ 5.8
CF-X-016-OG 240 500 7.9 1 ±0.5 2000 3.15×10⁴ 2.1×10⁻³ 9.6
CF-X-025-OG 370 800 7.8 1 ±0.5 2000 5.76×10⁴ 4.2×10⁻² 14.6
  • The maximum rotational speed does not take dynamic balance into account.
  • The values for the static torsional spring constant are given at 20°C.
  • The values for moment of inertia and mass are based on a flange hub with a bottom hole and a length of L=500 mm. (The price remains the same for lengths up to L=600 mm.)

[Dimensions]

三木プーリのセンタフレックスCF-Xモデル CF-X-Lタイプ ゴム・樹脂カップリング寸法図（全長指定対応・寸法変更可能・柔軟軸継手）
Unit [mm]
Model d2 D1 D2 N2 L2 A B E G S S1 M1 M2 R TK
Countersink Minimum Max
CF-X-001-OG 8 9 22 57 56 36 24 24 7 18 11 3 1 2-M6 2-M6 30 44
CF-X-002-OG 9 10 30 88 85 45 28 24 8 20 10 4 4 2-M8 2-M8 40 68
CF-X-004-OG 11 12 36 100 100 55 30 25 8 21 12 4 2.5 3-M8 3-M8 45 80
CF-X-008-OG 15 16 46 125 120 70 42 30 10 26 14 4 3 3-M10 3-M10 60 100
CF-X-016-OG 19 20 56 155 150 85 50 35 12 28 18 7 3 3-M12 3-M12 70 125
CF-X-025-OG 19 20 65 175 170 100 56 40 14 34 20 6 3 3-M14 3-M14 85 140
  • The pilot hole is a drill hole. The minimum values for d1 and d2 indicate the minimum hole diameters specified in our standard hole machining specifications, while the maximum values indicate the largest hole diameters that can be machined.
  • The designation for M1 and M2 bolts consists of the quantity followed by the thread size; the quantity refers to the number of bolts on one side.
  • The L dimension must be 1000 mm or less. Additionally, the minimum L dimension must allow sufficient space for the installation of an M1 bolt.

[Standard Hole Drilling Specifications]

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Keyway and Hole Diameter Chart
Unit [mm]
Compliant with JIS B 1301 1959 (Type
2)		 Compliant with New JIS Standard H9
JIS B 1301 1996		 Motor Standard
JIS C 4210 2001
Nominal Bore Diameter Bore Diameter
(d1, d2)		 Keyway width
(W1, W2)		 Keyway depth
(T1, T2)		 Set screw hole
(M)		 Nominal hole diameter Hole diameter
(d1, d2)		 Keyway width
(W1, W2)		 Keyway depth
(T1, T2)		 Set screw hole
(M)		 Nominal hole diameter Hole diameter
(d1, d2)		 Keyway width
(W1, W2)		 Keyway depth
(T1, T2)		 Set screw hole
(M)
Nominal hole diameter Tolerance H7, H8 Tolerance E9 － － Nominal hole diameter Tolerance H7 Tolerance H9 － － Nominal hole diameter Tolerance G7, F7 Tolerance H9 － －
9 9+0.0220 － － 2-M4 － － － － － － － － － －
10 10+0.0220 － － 2-M4 － － － － － － － － － －
11 11 + 0.0180 － － 2-M4 － － － － － － － － － －
12 12 + 0.0180 4 + 0.05 + 0.02 13.5 + 0.30 2-M4 12H 12 + 0.0180 4 + 0.030 13.8 + 0.30 2-M4 － － － － －
14 14 + 0.0180 5 + 0.05 + 0.02 16.0 + 0.30 2-M4 14H 14 + 0.0180 5 + 0.030 16.3 + 0.30 2-M4 14N 14 + 0.024 + 0.006 5 + 0.030 16.3 + 0.30 2-M4
15 15 + 0.0180 5 + 0.05 + 0.02 17.0 + 0.30 2-M4 15H 15 + 0.0180 5 + 0.030 17.3 + 0.30 2-M4 － － － － －
16 16 + 0.0180 5 + 0.05 + 0.02 18.0 + 0.30 2-M4 16H 16 + 0.0180 5 + 0.030 18.3 + 0.30 2-M4 － － － － －
17 17 + 0.0180 5 + 0.05 + 0.02 19.0 + 0.30 2-M4 17H 17 + 0.0180 5 + 0.030 19.3 + 0.30 2-M4 － － － － －
18 18 + 0.0180 5 + 0.05 + 0.02 20.0 + 0.30 2-M4 18H 18 + 0.0180 6 + 0.030 20.8 + 0.30 2-M5 － － － － －
19 19 + 0.0210 5 + 0.05 + 0.02 21.0 + 0.30 2-M4 19H 19 + 0.0210 6 + 0.030 21.8 + 0.30 2-M5 19N 19 + 0.028 + 0.007 6 + 0.030 21.8 + 0.30 2-M5
20 20 + 0.0210 5 + 0.05 + 0.02 22.0 + 0.30 2-M4 20H 20 + 0.0210 6 + 0.030 22.8 + 0.30 2-M5 － － － － －
22 22 + 0.0210 7 + 0.061 + 0.025 25.0 + 0.30 2-M6 22H 22 + 0.0210 6 + 0.030 24.8 + 0.30 2-M5 － － － － －
24 24 + 0.0210 7 + 0.061 + 0.025 27.0 + 0.30 2-M6 24H 24 + 0.0210 8 + 0.0360 27.3 + 0.30 2-M6 24N 24 + 0.028 + 0.007 8 + 0.0360 27.3 + 0.30 2-M6
25 25 + 0.0210 7 + 0.061 + 0.025 28.0 + 0.30 2-M6 25H 25 + 0.0210 8 + 0.0360 28.3 + 0.30 2-M6 － － － － －
28 28 + 0.0210 7 + 0.061 + 0.025 31.0 + 0.30 2-M6 28H 28 + 0.0210 8 + 0.0360 31.3 + 0.30 2-M6 28N 28 + 0.02 8 + 0.007 8 + 0.0360 31.3 + 0.30 2-M6
30 30 + 0.0210 7 + 0.06 1 + 0.025 33.0 + 0.30 2-M6 30H 30 + 0.0210 8 + 0.0360 33.3 + 0.30 2-M6 － － － － －
32 32 + 0.0250 10 + 0.06 1 + 0.025 35.5 + 0.30 2-M8 32H 32 + 0.0250 10 + 0.0360 35.3 + 0.30 2-M8 － － － － －
35 35 + 0.0250 10 + 0.06 1 + 0.025 38.5 + 0.30 2-M8 35H 35 + 0.0250 10 + 0.0360 38.3 + 0.30 2-M8 － － － － －
38 38 + 0.0250 10 + 0.06 1 + 0.025 41.5 + 0.30 2-M8 38H 38 + 0.0250 10 + 0.0360 41.3 + 0.30 2-M8 38N 38 + 0.05 + 0.025 10 + 0.0360 41.3 + 0.30 2-M8
40 40 + 0.0250 10 + 0.06 1 + 0.025 43.5 + 0.30 2-M8 40H 40 + 0.0250 12 + 0.0430 43.3 + 0.30 2-M8 － － － － －
42 42 + 0.0250 12 + 0.075 + 0.032 45.5 + 0.30 2-M8 42H 42 + 0.0250 12 + 0.0430 45.3 + 0.30 2-M8 42N 42 + 0.05 + 0.025 12 + 0.0430 45.3 + 0.30 2-M8
45 45 + 0.0250 12 + 0.075 + 0.032 48.5 + 0.30 2-M8 45H 45 + 0.0250 14 + 0.0430 48.8 + 0.30 2-M10 － － － － －
48 48 + 0.0250 12 + 0.075 + 0.032 51.5 + 0.30 2-M8 48H 48 + 0.0250 14 + 0.0430 51.8 + 0.30 2-M10 48N 48 + 0.05 + 0.025 14 + 0.0430 51.8 + 0.30 2-M10
50 50 + 0.0250 12 + 0.075 + 0.032 53.5 + 0.30 2-M8 50H 50 + 0.0250 14 + 0.0430 53.8 + 0.30 2-M10 － － － － －
55 55 + 0.030 15 + 0.075 + 0.032 60.0 + 0.30 2-M10 55H 55 + 0.030 16 + 0.0430 59.3 + 0.30 2-M10 55N 55 + 0.06 + 0.03 16 + 0.0430 59.3 + 0.30 2-M10
56 56 + 0.030 15 + 0.075 + 0.032 61.0 + 0.30 2-M10 56H 56 + 0.030 16 + 0.0430 60.3 + 0.30 2-M10 － － － － －
60 60 + 0.030 15 + 0.075 + 0.032 65.0 + 0.30 2-M10 60H 60 + 0.030 18 + 0.0430 64.4 + 0.30 2-M10 60N 60 + 0.06 + 0.03 18 + 0.0430 64.4 + 0.30 2-M10
63 63 + 0.030 18 + 0.075 + 0.032 69.0 + 0.30 2-M10 63H 63 + 0.030 18 + 0.0430 67.4 + 0.30 2-M10 － － － － －
65 65 + 0.030 18 + 0.075 + 0.032 71.0 + 0.30 2-M10 65H 65+0.030 18 + 0.0430 69.4 + 0.30 2-M10 65N 65 + 0.06 + 0.03 18 + 0.0430 69.4 + 0.30 2-M10


  • All specifications for diameters of 11 mm or less are identical to those listed in the "Old JIS Standards" column.
  • The set screw and the keyway will not be on the same plane.
  • <br> The set screw is included with the product.
  • The positional accuracy of keyway machining is checked visually.
  • Please contact us if you require positional accuracy for the keyway relative to each hub.
  • For standard dimensions of hole patterns other than those listed here, please refer to the technical documentation.
三木プーリのセンタフレックスCF-Xモデル（全長指定仕様）ゴム・樹脂カップリング ご注文時の型式構成説明図

[Location of the set screw (cylindrical hub)]

Unit [mm]
Cylindrical Hub Side Coupling Model Distance from end face [mm]
CF-X-001 6
CF-X-002 6
CF-X-004 6
CF-X-008 7
CF-X-016 10
CF-X-025 10

[Location of the set screw (flange hub)]

Unit [mm]
Flange Hub Side Coupling Model Position from end face [mm]
CF-X-001 6
CF-X-002 7
CF-X-004 7
CF-X-008 9
CF-X-016 10
CF-X-025 10