Type HF / HFD / HF-DX Fluid Coupling

Description

Constant-fill, fixed-speed couplings built for easy alignment.

The Fluidomat Type HF range is a constant-fill (fixed-speed) fluid coupling that is radially displaceable — driving and driven shafts can be pre-aligned, and the coupling fitted or removed, without disturbing either machine. A metallic disc flexible coupling is provided on both the input and output sides.

To match the starting and running characteristics of industrial machines, Fluidomat offers three circuit types that deliver starting torque down to 120% of nominal torque. Type HF is the basic coupling without a delay-fill chamber; Type HFD adds a delay-fill chamber; and Type HF-DX uses an extended delay-fill chamber for the lowest starting torque. All offer normal operating slip of 2–5% depending on size and torque setting.

Fluidomat Type HF / HFD / HF-DX fluid coupling

Key data

120%

Min. starting torque (HF-DX)

2–5%

Normal operating slip

130°C

Fusible plug blow-off (std)

2000

KW max rating (HF-16 DC)

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Specification

Three circuit types, one rugged platform

Choose the circuit that matches your machine's starting duty — each is built on the same radially displaceable construction.

Type HF (basic, no delay-fill chamber): starting torque adjustable from 180% to 275% of nominal
Type HFD (delay-fill chamber): starting torque adjustable from 150% to 275%
Type HF-DX (extended delay-fill chamber): starting torque adjustable from 120% to 270%
Normal operating slip of 2% to 5%, depending on coupling size and starting torque value

Fusible plug blow-off temperature of 130°C as standard; 160°C optional
Suitable for two consecutive starts from hot and three from cold
Radially displaceable design enables pre-alignment and easy fitting or removal
Metallic disc flexible coupling on input and output; outer-wheel brake-drum mounting available

Brake-drum (outer-wheel drive) option. For braked drives, the HF range can be supplied with an outer-wheel brake-drum mounting. Because the coupling is radially displaceable, the brake drum is shifted by a defined dimension during removal — so ensure the machine or gearbox shaft length leaves adequate space for this shift.

Selection data

Rating table — HF / HFD / HF-DX

Maximum ratings in KW at different input speeds (RPM). For final selection, please consult Fluidomat application engineering.

Maximum rating (KW) by input speed — Type HF / HFD / HF-DX
Model	500	600	750	900	1000	1200	1500	1800	3000	3600
1	—	—	0.5	0.9	1.2	2.2	4	7.5	20	26
2	—	—	0.9	1.7	2.2	4.1	7.5	13.7	30	36
3	—	—	1.3	2.4	3	6	11	18	38	45
4	—	1	2	4	5	9	16.5	22	45	—
5	—	2	4	7	9	16.3	30	42	70	—
6	—	3	5	9	11	22	40	60	110	—
7	—	4	8	15	18	34	62	85	140	—
8	—	6	10	18	23	44	80	120	—	—
8B	5	9	16	29	36	68	125	180	—	—
9	7	12	22	41	52	98	172	246	—	—
9B	9	16	29	54	68	129	228	300	—	—
10	13	22	39	73	91	172	275	370	—	—
10B	18	32	57	107	134	253	373	500	—	—
11	27	47	85	158	198	374	525	775	—	—
12	47	82	148	278	348	600	750	1000	—	—
13	95	163	293	550	620	850	1100	—	—	—
880	130	225	400	700	810	1150	1550	—	—	—
14	160	277	500	758	850	1250	—	—	—	—
15	275	472	850	1148	1250	—	—	—	—	—
16	340	583	1050	1400	1500	—	—	—	—	—
16DC	520	900	1500	1862	2000	—	—	—	—	—
1330	720	1250	2450	2500	—	—	—	—	—	—

Couplings for 3000 RPM to be selected only after Fluidomat’s approval.

Selection data

Technical specification & dimensions

Overall dimensions (mm), maximum bore, dry weight, oil filling and the connected metallic-disc flexible-coupling model, by frame size.

Technical specification & dimension table for HF, HFD, HF-DX couplings
Model HF	ØA	B — HF	B — HFD	B — HF-DX	Ød1 & Ød4 max	l1 & l4	Dry wt HF *	Dry wt HFD *	Dry wt HF-DX *	Oil HF	Oil HFD	Oil HF-DX	Flexible coupling
3	342	239	295	329	55	70	25	28	29	2.9	3.9	4.3	FXC-I
4	367	264	320	354	60	70	34	37	39	3.8	4.3	4.6	FXC-II
5	406	285	315	375	60	70	48	51	54	4.9	5.8	6.7	FXC-II
6	435	332	358	429	75	95	64	67	70	6.5	7.7	9.6	FXC-IIIA
7	471	345	390	460	75	95	81	84	86	8	9.4	11.3	FXC-IIIA
8	505	366	407	487	95	95	96	102	107	9.7	11.5	14.8	FXC-III
8 B	553	405	446	537	95	110	116	122	127	14.5	16.1	19.1	FXC-III
9	584	395	445	526	95	110	124	130	135	16.1	19.3	20.8	FXC-III
9 B	620	446	511	589	120	125	168	180	184	19.4	21.5	24.7	FXC-IV A
10	644	468	517	611	120	125	172	184	188	25.1	28.1	33.9	FXC-IV A
10 B	714	491	537	632	120	125	217	233	237	31.8	36.5	45.4	FXC-IV A
11	751	513	568	663	125	125	281	292	300	37.1	42.9	49	MD 286
12	845	614	700	820	150	200	400	421	430	51.3	65.6	81.5	FXC-V
13	960	697	745	875	150	200	570	596	605	72.4	91.3	106.6	FXC-V
14	1104	772	815	945	225	200	640	688	703	114.7	131.9	153.9	MD 440
15	1230	777	886	1016	225	200	810	880	900	147.6	181.4	193.1	MD 440
16	1298	882	965	1095	225	200	1280	1320	1380	189.2	241.7	238.4	MD 440

* With connected flexible coupling.

Connected flexible-coupling models

Metallic-disc flexible coupling — dimensions (mm) and minimum bore for the model connected to each HF frame size.

Connected metallic-disc flexible-coupling models (FXC)
FXC model	ØE	C	Y	K min	Min. bore
FXC-I	160	75	21	26	20
FXC-I	200	75	21	26	20
FXC-II	200	75	19	24	20
FXC-II	250	95	10	35	20
FXC-IIIA	250	95	35	35	20
	300	118	32	55
	315	118	32	55
FXC-III	250	95	48	35	25
	300	118	30	55
	315	118	30	55
	400	150	18	73
FXC-IVA	300	118	52	55	32
	315	118	52	55
	400	150	40	65
	500	190	05	70
MD 286	400	150	40	65	38
	500	190	05	70
	500	236	(-)31	80
FXC-V	500	190	70	70	50
	600	236	34	70
	630	236	34	70
	710	265	25	90
MD 440	600	236	34	70	50
	630	236	34	70
	710	265	25	90

Couplings for 3000 RPM to be selected only after Fluidomat’s approval.

Mass moment of inertia ‘J’ (with oil)

Outer- and inner-wheel mass moment of inertia with oil (kg·m²), by model and execution.

Mass moment of inertia ‘J’ with oil (kg·m²)
Model	Outer wheel	Inner wheel
HF-3	0.25	0.05
HF-4	0.39	0.07
HF-5	0.66	0.23
HF-6	0.69	0.29
HF-7	1.32	0.35
HF-8	1.72	0.49
HF-8B	2.4	0.64
HF-9	2.82	0.76
HF-9B	4.65	1.91
HF-10	5.01	2.11
HF-10B	10.15	3.34
HF-11	11.66	3.93
HF-12	18.3	7.31
HF-13	35.74	14.25
HF-14	61.46	24.1
HF-15	93.13	37.24
HFD-3	0.26	0.05
HFD-4	0.41	0.07
HFD-5	0.71	0.24
HFD-6	0.97	0.3
HFD-7	1.46	0.4
HFD-8	1.85	0.51
HFD-8B	2.61	0.72
HFD-9	3.06	0.93
HFD-9B	5.09	1.96
HFD-10	6.07	2.18
HFD-10B	11.3	3.44
HFD-11	12.97	4.07
HFD-12	20.33	7.61
HFD-13	39.82	14.78
HFD-14	68.04	24.98
HFD-15	102.7	38.61
HFD-16	—	—
HFDX-3	0.27	0.05
HFDX-4	0.42	0.07
HFDX-5	0.74	0.24
HFDX-6	1.04	0.3
HFDX-7	1.59	0.4
HFDX-8	1.96	0.51
HFDX-8B	2.76	0.72
HFDX-9	3.24	0.93
HFDX-9B	5.55	1.96
HFDX-10	7.04	2.18
HFDX-10B	12.3	3.44
HFDX-11	14.07	4.07
HFDX-12	21.93	7.61
HFDX-13	43.02	14.78
HFDX-14	73.14	24.98
HFDX-15	—	—

Construction & diagrams

Diagrams & views

Brake Drum Mounting Type HF/HFD/HF-DX with Brake Drum (Outer Wheel Drive)

Typical applications

Proven across rotating equipment

Belt conveyors Crushers Centrifugal pumps ID / FD fans Ball & rod mills Mixers & agitators Screens & feeders Compressors

Constant-Fill CouplingsFixed-speed soft-start range Variable Speed ScoopStepless, energy-saving control Catalogues & drawingsHF dimension & selection data

Need the right HF coupling for your drive?

Send us your motor rating, speed and driven-machine duty and our engineers will recommend the correct HF, HFD or HF-DX model.

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