CF-H [O2] Type | Miki Pulley

Power is transmitted using a polyester resin with elastic properties comparable to those of rubber. This coupling excels at absorbing vibrations and shocks, and offers superior environmental resistance—including heat, cold, and oil resistance—that cannot be achieved with natural rubber. The O2 type is supplied as a complete coupling set, including the resin element, aluminum insert, cylindrical hub, and flanged hub.

[Specifications]

CF-H-O2 Specifications

Model	Torque		Tolerance			Maximum Rotational Speed [min⁻¹]	Dynamic torsional spring constant [N·m/rad]	Moment of inertia [kg·m²]	Mass [kg]
Model	Rated [N·m]	Maximum [N·m]	Eccentricity [mm]	Angular offset [°]	Axial [mm]	Maximum Rotational Speed [min⁻¹]	Dynamic torsional spring constant [N·m/rad]	Moment of inertia [kg·m²]	Mass [kg]
CF-H-008-O2	100	200	0.3	0.5	± 3	6500	1.27 × 10⁴	3.9 × ^10⁻³	3.1
CF-H-016-O2	200	400	0.3	0.5	± 3	5500	2.46 × 10⁴	1.1 × 10^⁻²	5.6
CF-H-030-O2	400	800	0.4	0.5	± 3	4000	5.91 × 10⁴	4.6 × 10^⁻²	13.9
CF-H-040-O2	600	1200	0.4	0.5	± 3	4000	1.87 × 10⁵	2.8 × ^10⁻²	9.8
CF-H-050-O2	800	1600	0.4	0.5	± 3	4000	1.91 × 10⁵	5.0 × 10^⁻²	14.4
CF-H-090-O2	950	1900	0.4	0.5	± 3	4000	2.69 × 10⁵	5.3 × 10^⁻²	14.8
CF-H-110-O2	1100	2200	0.4	0.5	± 3	4000	2.79 × 10⁵	8.² × 10^⁻²	18.3
CF-H-160-O2	1600	3200	0.4	0.5	± 3	3600	5.11 × 10⁵	0.16	26.1
CF-H-240-O2	2500	5000	0.4	0.5	± 3	3000	5.10 × 10⁵	0.39	48.8

The maximum rotational speed does not take dynamic balance into account.
Since the dynamic torsional spring characteristics are nonlinear, the dynamic torsional spring constant is applicable at approximately 20% or more of the rated torque.
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-Hモデル CF-H-O2タイプゴム・樹脂カップリング寸法図（防振・高トルク対応・柔軟軸継手）

Unit [mm]

Model	d1			d2			D1	D2	N1	N2	L1	L2	L3	A	B	B1	C	E	F	S	TK	M1	M2	CAD File No.
Model	Pilot hole	Minimum	Max	Pilot hole	Min	Max	D1	D2	N1	N2	L1	L2	L3	A	B	B1	C	E	F	S	TK	M1	M2	CAD File No.
CF-H-008	12	14	38	15	16	46	125	120	60	70	40	42	88	32	10	10	46	25	20	6	100	3-M10	3-M10	–
CF-H-016	15	16	48	19	20	56	155	150	70	85	52	50	110	41	12	12	60	34	26	8	125	3-M12	3-M12	–
CF-H-030	20	22	65	28	30	80	205	200	100	120	68	66	144	56	16	15	78	46	35	10	165	3-M16	3-M16	—
CF-H-040	22	24	50	22	24	65	175	180	85	100	58	56	124	50	16	16	68	42	31	10	140	4-M16	4-M16	–
CF-H-050	20	22	65	28	30	80	205	200	100	120	68	66	144	56	16	15	78	46	35	10	165	4-M16	4-M16	–
CF-H-090	20	22	65	28	30	80	215	200	100	120	68	66	144	56	16	15	78	46	35	10	165	4-M16	4-M16	–
CF-H-110	25	28	63	28	30	80	225	230	100	120	68	66	144	56	18	18	78	46	35	10	180	4-M18	4-M18	–
CF-H-160	30	32	85	30	32	95	270	260	125	140	84	80	177	59	19	20	97	48	37	13	215	4-M20	4-M20	—
CF-H-240	40	42	115	40	42	120	330	320	160	180	100	100	213	65	19	20	113	54	40	13	260	4-M20	4-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 TK dimension refers to the bolt mounting pitch diameter of the flange hub or mating mounting surface.

[Standard Hole Drilling Specifications]

JIS Keyway Dimensions Table

Unit [mm]

Compatible with Old JIS (Type 2) Standards					Compatible with New JIS Standards					Compatible with New Standard Motors
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	E9	+0.30	―	Tolerance	H7	H9	+0.30	―	Tolerance	G7, F7	H9	+0.30	―
14	14 +0.0180 0	5 +0.050 +0.020	16.0	2-M4	14H	14 +0.0180 0	5 +0.0300 0	16.3	2-M4	14N	14 +0.024 +0.006	5 +0.0300 0	16.3	2-M4
15	15 +0.0180 0	5 +0.050 +0.020	17.0	2-M4	15H	15 +0.0180 0	5 +0.0300 0	17.3	2-M4	－	－	－	－	－
16	16 +0.0180 0	5 +0.050 +0.020	18.0	2-M4	16H	16 +0.0180 0	5 +0.0300 0	18.3	2-M4	－	－	－	－	－
17	17 +0.0180 0	5 +0.050 +0.020	19.0	2-M4	17H	17 +0.0180 0	5 +0.0300 0	19.3	2-M4	－	－	－	－	－
18	18 +0.0180 0	5 +0.050 +0.020	20.0	2-M4	18H	18 +0.0180 0	6 +0.0300 0	20.8	2-M5	－	－	－	－	－
19	19 +0.0210 0	5 +0.050 +0.020	21.0	2-M4	19H	19 +0.0210 0	6 +0.0300 0	21.8	2-M5	19N	19 +0.028 +0.007	6 +0.0300 0	21.8	2-M5
20	20 +0.0210 0	5 +0.050 +0.020	22.0	2-M4	20H	20 +0.0210 0	6 +0.0300 0	22.8	2-M5	－	－	－	－	－
22	22 +0.0210 0	7 +0.061 +0.025	25.0	2-M6	22H	22 +0.0210 0	6 +0.0300 0	24.8	2-M5	－	－	－	－	－
24	24 +0.0210 0	7 +0.061 +0.025	27.0	2-M6	24H	24 +0.0210 0	8 +0.0360 0	27.3	2-M6	24N	24 +0.028 +0.007	8 +0.0360 0	27.3	2-M6
25	25 +0.0210 0	7 +0.061 +0.025	28.0	2-M6	25H	25 +0.0210 0	8 +0.0360 0	28.3	2-M6	－	－	－	－	－
28	28 +0.0210 0	7 +0.061 +0.025	31.0	2-M6	28H	28 +0.0210 0	8 +0.0360 0	31.3	2-M6	28N	28 +0.028 +0.007	8 +0.0360 0	31.3	2-M6
30	30 +0.0210 0	7 +0.061 +0.025	33.0	2-M6	30H	30 +0.0210 0	8 +0.0360 0	33.3	2-M6	－	－	－	－	－
32	32 +0.0250 0	10 +0.061 +0.025	35.5	2-M8	32H	32 +0.0250 0	10 +0.0360 0	35.3	2-M8	－	－	－	－	－
35	35 +0.0250 0	10 +0.061 +0.025	38.5	2-M8	35H	35 +0.0250 0	10 +0.0360 0	38.3	2-M8	－	－	－	－	－
38	38 +0.0250 0	10 +0.061 +0.025	41.5	2-M8	38H	38 +0.0250 0	10 +0.0360 0	41.3	2-M8	38N	38 +0.050 +0.025	10 +0.0360 0	41.3	2-M8
40	40 +0.0250 0	10 +0.061 +0.025	43.5	2-M8	40H	40 +0.0250 0	12 +0.0430 0	43.3	2-M8	－	－	－	－	－
42	42 +0.0250 0	12 +0.075 +0.032	45.5	2-M8	42H	42 +0.0250 0	12 +0.0430 0	45.3	2-M8	42N	42 +0.050 +0.025	12 +0.0430 0	45.3	2-M8
45	45 +0.0250 0	12 +0.075 +0.032	48.5	2-M8	45H	45 +0.0250 0	14 +0.0430 0	48.8	2-M10	－	－	－	－	－
48	48 +0.0250 0	12 +0.075 +0.032	51.5	2-M8	48H	48 +0.0250 0	14 +0.0430 0	51.8	2-M10	48N	48 +0.050 +0.025	14 +0.0430 0	51.8	2-M10
50	50 +0.0250 0	12 +0.075 +0.032	53.5	2-M8	50H	50 +0.0250 0	14 +0.0430 0	53.8	2-M10	－	－	－	－	－
55	55 +0.0300 0	15 +0.075 +0.032	60.0	2-M10	55H	55 +0.0300 0	16 +0.0430 0	59.3	2-M10	55N	55 +0.060 +0.030	16 +0.0430 0	59.3	2-M10
56	56 +0.0300 0	15 +0.075 +0.032	61.0	2-M10	56H	56 +0.0300 0	16 +0.0430 0	60.3	2-M10	－	－	－	－	－
60	60 +0.0300 0	15 +0.075 +0.032	65.0	2-M10	60H	60 +0.0300 0	18 +0.0430 0	64.4	2-M10	60N	60 +0.060 +0.030	18 +0.0430 0	64.4	2-M10
63	63 +0.0300 0	18 +0.075 +0.032	69.0	2-M10	63H	63 +0.0300 0	18 +0.0430 0	67.4	2-M10	－	－	－	－	－
65	65 +0.0300 0	18 +0.075 +0.032	71.0	2-M10	65H	65 +0.0300 0	18 +0.0430 0	69.4	2-M10	65N	65 +0.060 +0.030	18 +0.0430 0	69.4	2-M10

三木プーリのセンタフレックスCF-HモデルOBタイプゴム・樹脂カップリング寸法図外形寸法および主要部寸法を示す寸法図

[Location of the set screw (cylindrical hub)]

Unit [mm]

Cylindrical hub coupling size	Distance from end face [mm]
008	7
016	10
030	11
040	10
050, 090, 110	11
160・240	15

[Location of the set screw (flange hub)]

Unit [mm]

Flange hub side coupling size	Distance from end face [mm]
008	9
016	10
030	15
040	10
050, 090, 110	15
160・240	15