CF-B [H] Polyester Resin Type

三木プーリのセンタフレックスCF-Bモデル CF-B-Hタイプ ゴム・樹脂カップリング製品画像（ポリエステル樹脂エレメント・高耐久防振継手）
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Because the element is made of highly elastic polyester resin, it excels at absorbing vibrations and shocks during power transmission and also reduces noise. The CF-B model features a compact and simple design in which the element is simply sandwiched between two hubs, allowing for smooth power transmission even if the axes of the two shafts are misaligned.

[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
[N·m]		 Maximum
[N·m]		 Eccentricity
[mm]		 Eccentric angle
[°]		 Axial
[mm]
CF-B-070-H 45 60 0.3 0.5 ±1 10,000 2.76×10³ 2.80×10⁻⁴ 0.7
CF-B-080-H 85 120 0.3 0.5 ±1 9000 4.15×10³ 3.39×10⁻⁴ 0.8
CF-B-100-H 170 240 0.3 0.5 ±1 7500 9.49×10³ 1.34×10⁻³ 2
CF-B-120-H 350 500 0.3 0.5 ±1 6000 2.03×10⁴ 3.34×10⁻³ 3.4
CF-B-140-H 560 800 0.3 0.5 ±1 5000 3.44×10⁴ 7.02×10⁻³ 5.4
CF-B-165-H 850 1200 0.3 0.5 ±1 4000 5.24×10⁴ 1.78×10⁻² 8.7
CF-B-185-H 1400 2000 0.3 0.5 ±1 3600 2.53×10⁵ 3.67×10⁻² 13.8

  • 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, mass, and price are for cylindrical hubs with a through-hole.

[Dimensions]

三木プーリのセンタフレックスCF-Bモデル CF-B-Hタイプ ゴム・樹脂カップリング寸法図（ポリエステル樹脂エレメント・高耐久防振継手）
Unit [mm]
Model d1・d2 D N L1 L2 S E F M
Pilot hole Minimum Max
CF-B-070 9 10 30 72 45 28 62 6 14 40 4-M8
CF-B-080 12 14 30 76 45 30 66 6 16 42 6-M8
CF-B-100 12 14 38 98 60 42 90 6 24 64.5 6-M10
CF-B-120 15 16 48 120 70 50 106 6 28 76 6-M12
CF-B-140 15 16 55 138 85 55 116 6 30 83 6-M14
CF-B-165 19 20 60 165 100 65 138 8 36 99 6-M16
CF-B-185 29 30 80 187 115 80 170 10 45 123 6-M20

  • 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 Bolt M is based on the quantity and thread size.

[Standard Hole Drilling Specifications]

?
Unit [mm]
JIS Old Standard Type 2
Compliant with JIS B 1301 1959 		JIS New Standard H9
Compliant with JIS B 1301 1996 		Motor Standard
Compliant with 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)
Tolerance H7, H8 Tolerance E9 +0.30 ― Tolerance H7 Tolerance H9 ― Tolerance G7, F7 Tolerance H9 ―
10 10 +0.022 0 ― ― 2-M4 ― ― ― ― ― ― ― ― ― ―
11 11 +0.018 0 ― ― 2-M4 ― ― ― ― ― ― ― ― ― ―
12 12 +0.018 0 4 +0.050 +0.020 13.5 +0.30 2-M4 12H 12 +0.018 0 4 +0.030 0 13.8 +0.30 2-M4 ― ― ― ― ―
14 14 +0.018 0 5 +0.050 +0.020 16.0 +0.30 2-M4 14H 14 +0.018 0 5 +0.030 0 16.3 +0.30 2-M4 14N 14 +0.024 +0.006 5 +0.030 0 16.3 +0.30 2-M4
15 15+0.0180 5+0.050+0.020 17.0+0.30 2-M4 15H 15+0.0180 5+0.0300 17.3+0.30 2-M4 ― ― ― ― ―
16 16+0.0180 5+0.050+0.020 18.0+0.30 2-M4 16H 16+0.0180 5+0.0300 18.3+0.30 2-M4 ― ― ― ― ―
17 17+0.0180 5+0.050+0.020 19.0+0.30 2-M4 17H 17+0.0180 5+0.0300 19.3+0.30 2-M4 ― ― ― ― ―
18 18+0.0180 5+0.050+0.020 20.0+0.30 2-M4 18H 18+0.0180 6+0.0300 20.8+0.30 2-M5 ― ― ― ― ―
19 19+0.0210 5+0.050+0.020 21.0+0.30 2-M4 19H 19+0.0210 6+0.0300 21.8+0.30 2-M5 19N 19+0.028+0.007 6+0.0300 21.8+0.30 2-M5
20 20+0.0210 5+0.050+0.020 22.0+0.30 2-M4 20H 20+0.0210 6+0.0300 22.8+0.30 2-M5 ― ― ― ― ―
22 22.8+0.0210 7+0.061+0.025 25.0+0.30 2-M6 22H 22+0.0210 6+0.0300 24.8+0.30 2-M5 ― ― ― ― ―
24 24.8+0.0210 7+0.06 1+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 28.3+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+0.028+0.007 8+0.0360 31.3+0.30 2-M6
30 30+0.0210 7+0.061+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+0.061+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+0.061+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+0.061+0.025 41.5+0.30 2-M8 38H 38+0.0250 10+0.0360 41.3+0.30 2-M8 38N 38+0.050+0.025 10+0.0360 41.3+0.30 2-M8
40 40+0.0250 10+0.061+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+0.050+0.025 12+0.0430 45.3+0.30 2-M8
45 45.3+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 48.8+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+0.050+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+0.0300 15+0.075+0.032 60.0+0.30 2-M10 55H 55+0.0300 16+0.0430 59.3+0.30 2-M10 55N 55+0.060+0.030 16+0.0430 59.3+0.30 2-M10
56 56+0.0300 15+0.075+0.032 61.0+0.30 2-M10 56H 56+0.0300 16+0.0430 60.3+0.30 2-M10 ― ― ― ― ―
60 60+0.0300 15+0.075+0.032 65.0+0.30 2-M10 60H 60+0.0300 18+0.0430 64.4+0.30 2-M10 60N 60+0.060+0.030 18+0.0430 64.4+0.30 2-M10
63 63+0.0300 18+0.075+0.032 69.0+0.30 2-M10 63H 63+0.0300 18+0.0430 67.4+0.30 2-M10 ― ― ― ― ―
65 65+0.0300 18+0.075+0.032 71.0+0.30 2-M10 65H 65+0.0300 18+0.0430 69.4+0.30 2-M10 65N 65+0.060+0.030 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.
  • 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 machining 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-Bモデル（ポリエステル樹脂仕様）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]

CF-B Position Chart from End Face
Model Distance from End
Face [mm]
CF-B-070 7
CF-B-080 8
CF-B-100 10
CF-B-120 10
CF-B-140 10
CF-B-165 15
CF-B-185 15