Rubbflex Couplings

Rubber Products
Anti-vibration Rubber

The tire-type coupling features flexibility and vibration absorption properties and has a strong reinforced fiber core with rubber that is resistant to bending fatigue.

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Applications

• Rubber shaft couplings

Features

• Feature 1
The coupling tolerates a wide range of deflection angle, eccentricity, and gap error of highly flexible shaft. However, care must be taken when using the coupling under such specifications, as it may create a reactive force in proportion to the amount of deviation, resulting in damage to the device.

Deflection angle

The allowable deflection angle (Δθ) for each size is 3° or less for both axes.
Eccentricity

The allowable eccentricity (Δh) for each size is 1% or less of the outer diameter of the coupling for both axes.
Gap error (end play)

The allowable gap between both flanges (Z2) for each size is 0 to -2% or less of the outer diameter of the coupling.

• Feature 2
The coupling has superior shock absorption and torsion damping. It is made of highly elastic rubber for extremely good absorption of shocks and vibration. This enables it to rotate very quietly and without vibration. The torsion angle of the coupling is proportional to the shaft’s running torque, facilitating design for cases in which the shaft vibration must be particularly taken into consideration.

• Feature 3
The simple structure enables easy installation and removal.
The rubber tire fastening hardware can be installed easily by tightening the bolt to move the pressure ring to the specified position (the stepped part of the flange boss in the RF-type or the groove in the flange boss in the RFH-type). Even if it is necessary to replace a coupling, a slit in the rubber tire at one location makes it possible to remove and replace the coupling without moving machinery.

• Feature 4
No lubrication is required, enabling easy maintenance and high cost-efficiency.
The coupling is almost completely unaffected by moisture and dust, meaning that it rarely requires maintenance. Because there is no metal friction area, it produces very little noise during operation, does not require lubrication, and generates no friction. The coupling reduces the cost for the coupling devices, making it more economical than other couplings.

Type

RF-type

Part number	Part name	Material	Surface treatment
1	Flange	FC200-equivalent	Lacquer coating (reddish brown)
2	Pressure ring	SS400	Lacquer coating (reddish brown)
3	Rubber tire	Rubber, reinforced fiber	−
4	Bolt	SWCH10R	Zinc plating
5	Common washer	SPCC	Zinc plating

Notes
1. Standard flange material is equivalent to FC200. (SS400 only for RF-60) Contact us if you require another material.
2. For RF-60 only, a spring washer is used instead of a common washer.
3. The bore size (d) will be finished using the “d min” dimensions unless otherwise specified. (φd tolerance: 0 to -1)
4. Appropriate ambient temperature is around +20°C. Use within an ambient temperature range of -10°C to +60°C.

	Outer dia.	Bore		Outer dia. of boss	Total width	Length of single flange	Outer dia. of flange	Flange separation			Bolt pitch dia.	Bolt size			Max. rpm	Max. torque	Mass moment of inertia	Vibration moment	Weight
	Outer dia.	Min.	Max.	Outer dia. of boss	Total width	Length of single flange	Outer dia. of flange	Flange separation			Bolt pitch dia.	Number of bolts	Nominal dia. × pitch	Length	Max. rpm	Max. torque	Mass moment of inertia	Vibration moment	Weight
Size no.	Da	d min	d max	Dn	L	H	Df	Z₁	Z₂	Z₃	B	N	d₁ × p	ℓ	n	T	I	GD²	W
Size no.	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm	r.p.m.	N·m	kg·m²	N·m²	kg
RF- 60	60	8	12	20	32	10.5	44	11	5	25	29	12	M4×0.7	10	4,000	9.8	0.00008	0.0029	0.28
RF-100	100	10	22	36	66	26	80	14	10	40	54	12	Ｍ6×1	15	4,000	29	0.00088	0.0343	1.21
RF-135	135	16	30	48	90	35	108	20	14	53	70	12	M8×1.25	20	4,000	78	0.0038	0.151	2.87
RF-180	180	23	35	64	120	46	144	28	20	70	95	12	M10×1.5	25	3,000	147	0.0151	0.588	6.38
RF-210	210	28	50	76	143	54	168	35	27	83	110	16	M10×1.5	30	3,000	294	0.0319	1.25	9.40
RF-265	265	33	60	95	178	67	210	44	32	105	140	16	M12×1.75	40	2,000	736	0.101	3.96	19.0
RF-310	310	36	70	112	208	75	248	58	36	121	165	16	M12×1.75	45	2,000	1,230	0.224	8.77	31.0
RF-400	400	40	85	145	270	100	320	70	44	153	210	16	M16×2	55	1,600	2,700	0.791	31.0	70.0
RF-450	450	55	100	165	300	110	360	80	50	171	240	16	M20×2.5	60	1,250	4,900	1.39	54.6	101
RF-550	550	90	130	200	365	130	440	105	53	196	280	16	M24×3	75	1,000	9,810	3.78	148	170
RF-700	700	100	160	255	460	165	560	130	70	256	364	16	M30×3.5	100	800	19,600	12.6	492	358

Note 1: The figures in this table represent standard measurements at the time of temporary assembly.

RFH-type

Part number	Part name	Material	Surface treatment
1	Flange	FC200-equivalent	Lacquer coating (reddish brown)
2	Pressure ring	SS400	Lacquer coating (reddish brown)
3	Rubber tire	Rubber, reinforced fiber	−
4	Bolt	SWCH10R	Zinc plating
5	Common washer	SPCC	Zinc plating

Notes
1. Standard flange material is equivalent to FC200. Contact us if you require another material.
2. The bore size (d) will be finished using the “d min” dimensions unless otherwise specified. (φd tolerance: 0 to -1)
3. Appropriate ambient temperature is around +20°C. Use within an ambient temperature range of -10°C to +60°C.

	Outer dia.	Bore		Outer dia. of boss	Total width	Length of single flange	Outer dia. of flange	Flange separation			Bolt pitch dia.	Bolt size			Max. rpm	Max. torque	Mass moment of inertia	Vibration moment	Weight
	Outer dia.	Min.	Max.	Outer dia. of boss	Total width	Length of single flange	Outer dia. of flange	Flange separation			Bolt pitch dia.	Number of bolts	Nominal dia. × pitch	Length	Max. rpm	Max. torque	Mass moment of inertia	Vibration moment	Weight
Size no.	Da	d min	d max	Dn	L	H	Df	Z₁	Z₂	Z₃	B	N	d₁ × p	ℓ	n	T	I	GD²	W
Size no.	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm	r.p.m.	N·m	kg·m²	N·m²	kg
RFH-100	100	10	22	38	63	25	80	13	5	38	54	12	M6×1	15	5,000	49	0.00095	0.0373	1.22
RFH-125	125	12.5	30	48	80	31.5	100	17	7	47	68	12	Ｍ6×1	20	4,500	98	0.0028	0.110	2.12
RFH-155	155	16	32	60	100	40	124	20	9	58	84	12	M8×1.25	25	4,200	167	0.0080	0.314	4.56
RFH-180	180	20	35	68	125	50	144	25	10	66	95	12	M10×1.5	25	3,500	294	0.0169	0.657	6.88
RFH-210	210	25	50	80	140	56	168	28	12	75	110	16	M10×1.5	30	3,000	490	0.0355	1.39	9.79
RFH-265	265	31.5	60	100	160	63	210	34	16	97	140	16	M12×1.75	40	2,500	981	0.112	4.38	20.0
RFH-310	310	40	70	118	200	80	248	40	18	113	165	16	M12×1.75	45	2,000	1,370	0.248	9.73	35.0
RFH-400	400	50	85	152	250	100	320	50	23	143	210	16	M16×2	55	1,600	3,140	0.863	33.8	75.0
RFH-450	450	63	100	172	315	125	360	65	25	161	240	16	M20×2.5	60	1,400	4,900	1.56	61.1	115
RFH-550	550	80	130	210	355	140	440	75	30	191	280	16	M24×3	75	1,100	9,810	4.22	166	190
RFH-700	700	100	160	266	450	180	560	90	40	246	364	16	M30×3.5	100	900	19,600	14.2	557	400

Note 1: The figures in this table represent standard measurements at the time of temporary assembly.

Inquiries

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