CF-A [O1] Bolt-Mounted Type

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Power is transmitted via pre-compressed rubber. It excels at absorbing vibrations and shocks, and also reduces noise from machinery. The elastic rubber component consists of a polygonal rubber body with aluminum inserts at its vertices. The rubber body is supplied together with a cylindrical hub, mounting bolts, and spring pins.

[Specifications]

CF-A-O1-1360 Specifications
Model Torque Tolerance Maximum Rotational Speed
[min⁻¹]		 Dynamic torsional spring constant
[N·m/rad]		 Moment of
inertia [kg·m²]		 Mass
[kg]		 Price
[JPY]
Rated
[N·m]		 Maximum
[N·m]		 Permissible Variation
[N·m/10 Hz]		 Eccentricity
[mm]		 Angular Misalignment
[°]		 Axial
[mm]
CF-A-001-O1-1360 10 25 ±4 0.5 3 ±2 10,000 1.47×10² 5.8×10⁻⁵ 0.3 －
CF-A-002-O1-1360 20 50 ±8 1 ±3 8,000 2.92×10² 2.5×10⁻⁴ 0.5 －
CF-A-004-O1-1360 40 100 ±16 7000 7.59×10² 5.4×10⁻⁴ 0.6 －
CF-A-008-O1-1360 80 200 ±32 ±4 6500 1.44×10³ 1.6×10⁻³ 1.3 －
CF-A-012-O1-1360 120 300 ±48 2 6500 4.38×10³ 1.8×10⁻³ 1.3 －
CF-A-016-O1-1360 160 400 ±64 1.5 ±5 6000 3.28×10³ 4.3×10⁻³ 2.3 －
CF-A-022-O1-1360 220 550 ±88 6000 8.26×10³ 4.8×10⁻³ 2.4 －
CF-A-025-O1-1360 250 630 ±100 2 5000 4.12×10³ 8.5×10⁻³ 3.6 －
CF-A-028-O1-1360 350 880 ±140 5000 1.05×10⁴ 9.6×10⁻³ 3.8 －
CF-A-030-O1-1360 400 1000 ±160 3 4000 6.40×10³ 2.1×10⁻² 6.0 －
CF-A-050-O1-1360 600 1500 ±240 2 4000 1.48×10⁴ 2.3×10⁻² 6.3 －
CF-A-080-O1-1360 800 2000 ±320 ±4 4000 2.17×10⁴ 2.6×10⁻² 7.6 －
CF-A-090-O1-1360 900 2250 ±360 3 ±5 3600 1.37×10⁴ 6.7×10⁻² 11.8 －
CF-A-140-O1-1360 1400 3500 ±560 2 3600 2.90×10⁴ 7.4×10⁻² 12.6 －
CF-A-200-O1-1360 2000 5000 ±800 3200 6.08×10⁴ 0.14 17.8 －
CF-A-250-O1-1360 3000 8750 ±1250 3000 8.28×10⁴ 0.24 24.5 －
CF-A-400-O1-1360 5000 12,500 ±2000 2800 1.25×10⁵ 0.44 37.6 －
  • The maximum rotational speed does not take dynamic balance into account.
  • As a general rule, the dynamic torsional spring constant is approximately 1.3 times the static torsional spring constant.
  • The values for moment of inertia and mass apply to cylindrical hubs and flanged hubs with a through-bore.

[Dimensions]

三木プーリのセンタフレックスCF-Aモデル CF-A-O1タイプ ゴム・樹脂カップリング寸法図（防振・軸ずれ吸収・柔軟軸継手）
Unit [mm]
Model d1 d2 D1 D2 D3 N1 N2 L1 L2 L3 A B C E G1 G2 O P S TK M1 M2
Pilot hole Minimum Max Pilot hole Minimum Max
CF-A-001 8 9 19 8 9 22 57 56 56 30 36 32 24 58 24 7 34 22 11 - 5 18 2 44 2-M6 2-M6
CF-A-002 10 11 28 9 10 30 86 85 85 40 45 30 28 62 8 20 10 14 12 4 68 2-M8 2-M8
CF-A-004 12 14 30 11 12 36 100 97 100 45 55 34 30 68 28 38 24 12 18.3 17 80 3-M8 3-M8
CF-A-008 38 15 16 46 122 120 120 60 70 40 42 86 32 10 44 28 14 20.5 20.5 100 3-M10 3-M10
CF-A-012 4-M10 4-M10
CF-A-016 15 16 48 19 20 56 150 150 150 70 85 52 50 108 42 12 58 36 18 25 23.5 6 125 3-M12 3-M12
CF-A-022 4-M12 4-M12
CF-A-025 55 65 170 170 170 85 100 58 56 120 46 14 64 40 20 26 26 140 3-M14 3-M14
CF-A-028 4-M14 4-M14
CF-A-030 20 22 65 28 30 80 200 200 200 100 120 68 66 142 58 16 76 50 25 33 34.5 8 165 3-M16 3-M16
CF-A-050 4-M16 4-M16
CF-A-080 205 205 80 150 65 84 61 30.5 4
CF-A-090 30 32 85 30 32 95 260 260 260 125 140 84 80 172 70 19 92 62 31 46 45 8 215 3-M20 3-M20
CF-A-140 4-M20 4-M20
CF-A-200 35 38 105 35 38 110 300 300 300 145 160 94 90 192 80 102 72 36 250
CF-A-250 40 42 115 40 42 120 340 340 340 160 180 100 100 208 85 108 77 22.5 32 60 60 280 8-M20
CF-A-400 130 370 370 370 170 200 125 125 260 105 29 135 95 28.5 38 70.5 67 10 300 4-M24
  • 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 values in the table above represent the dimensions after the rubber assembly has been completed; therefore, the N1, TK, D1, and D2 dimensions prior to assembly differ from those shown in the table.
  • The TK dimension refers to the bolt mounting pitch diameter of the flange hub or mating mounting surface.
  • The designation for M1 and M2 bolts is based on the quantity and thread size.
  • When using hex socket head cap screws with the CF-A-400, you must use the special flat washers included with the rubber body.

[Standard Hole Drilling Specifications]

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JIS Keyway and Hole Diameter Chart
Unit [mm]
Compliant with JIS B 1301 1959 (Type 2, Old Standard) Compliant with JIS New Standard H9 JIS B 1301 1996 Motor Standard JIS C 4210 2001
Nominal Hole 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 E9 — — Tolerance H7 H9 — — Tolerance G7, F7 H9 — —
9 9+0.0220 — — 2-M4 — — — — — — — — — —
10 10+0.0220 — — 2-M4 — — — — — — — — — —
11 11 + 0.0180 — — 2-M4 — — — — — — — — — —
12 12 + 0.0180 4 + 0.050 + 0.020 13.5 + 0.30 2-M4 12H 12 + 0.0180 4 + 0.0300 13.8 + 0.30 2-M4 — — — — —
14 14 + 0.0180 5 + 0.050 + 0.020 16.0 + 0.30 2-M4 14H 14 + 0.0180 5 + 0.0300 16.3 + 0.30 2-M4 14N 14 + 0.024 + 0.006 5 + 0.0300 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 + 0.05 0 + 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 + 0.05 0 + 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 + 0.05 0 + 0.020 22.0 + 0.30 2-M4 20H 20 + 0.0210 6 + 0.0300 22.8 + 0.30 2-M5 — — — — —
22 22 + 0.0210 7 + 0.06 1 + 0.025 25.0 + 0.30 2-M6 22H 22 + 0.0210 6 + 0.0300 24.8 + 0.30 2-M5 — — — — —
24 24 + 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 + 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 + 0.050 + 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 + 0.050 + 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 + 0.050 + 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" section.
  • 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 keyways relative to each hub.
  • For standard dimensions of hole machining other than those listed here, please refer to the technical documentation.
  • We also offer spline machining. Please contact us for more information.
三木プーリのセンタフレックスCF-Aモデル O1タイプ 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 coupling size Distance from end face [mm]
001 6
002・004
008, 012 7
016, 022, 025, 028 10
030, 050, 080 11
090, 140 13
200, 250, 400