CF-H [OB] 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 OB type includes a resin element, an aluminum insert, and bolts.

[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-OB	100	200	0.3	0.5	±3	6500	1.27×10⁴	9.4×10⁻⁴	0.4
CF-H-016-OB	200	400	0.3	0.5	±3	5500	2.46×10⁴	3.0×10⁻³	0.8
CF-H-030-OB	400	800	0.4	0.5	±3	4000	5.91×10⁴	9.2×10⁻³	1.5
CF-H-040-OB	600	1200	0.4	0.5	±3	4000	1.87×10⁵	6.9×10⁻³	1.4
CF-H-050-OB	800	1600	0.4	0.5	±3	4000	1.91×10⁵	1.2×10⁻²	1.8
CF-H-090-OB	950	1900	0.4	0.5	±3	4000	2.69×10⁵	1.5×10⁻²	2.3
CF-H-110-OB	1100	2200	0.4	0.5	±3	4000	2.79×10⁵	2.3×10⁻²	2.8
CF-H-160-OB	1600	3200	0.4	0.5	±3	3600	5.11×10⁵	3.6×10⁻²	3.4
CF-H-240-OB	2500	5000	0.4	0.5	±3	3000	5.10×10⁵	0.1	5.8

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 bottom bore.

[Dimensions]

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

CF-H Dimension Chart

Unit [mm]

Model	d1			d2			D1	D2	N1	N2	L1	L2	L3	A	B	B1	C	E	F	S	TK	M1	M2
Model	Pilot hole	Minimum	Max	Pilot hole	Minimum	Max	D1	D2	N1	N2	L1	L2	L3	A	B	B1	C	E	F	S	TK	M1	M2
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

3. Unordered List (Asterisk) - 2