ST4

Safety couplings

The ST4 heavy-duty safety coupling from R+W Couplings features an integral toothed arc coupling and is used for direct drive with torque overload, accommodating both lateral, axial, and angular misalignments. The ST4 coupling has a robust, compact, and simple design, and offers highly precise overload protection. The industrial coupling is torsionally rigid and features an integral heavy-duty bearing for support. The maximum torque of the industrial coupling can also be manually adjusted using an adjusting wrench. This wrench can be ordered separately. For specific inquiries about safety couplings or other industrial couplings, please contact VARIODRIVE.

Version

Torque limiter with toothed coupling and keyway

Limiting torque

200 - 250.000 Nm

Speed

tot 4000 rpm

Temperature Range

-30 tot +120 oC

Material

Reinforced nitro-carburized steel

Safety elements

Evenly distributed

Backlash

none

Service-life

no service

Optional

ATEX, adjusting wrench, adjusting plate

Datasheets

ATEX instructies
Uitleg veiligheidssystemen
Datasheet ST4

Manuals

Manual ST Koppelingen

Tabel

ST4 Series		2	5	10	25	40	60	100	160	250
Overall length	A1	280	350	390	460	580	650	780	860	1060
Fit length / keyway length (mm)	C1/2	62	76	90	105	135	150	190	220	290
Bore diameter Ø bis Ø F7 (mm)	D1/2	30-78	32-98	42-112	46-132	60-174	70-190	110-233	120-280	200-340
Bolt circle diameter ST (mm)	O	154	171	220	270	350	376	490	532	630
Moment of inertia (approx.) D max. + max. sgmnt (10-3 kgm2)		108	244	529	1117	4363	6650	20611	33820	84926
Moment of inertia (approx.) D max. + max. sgmnt (10-3kgm2)		2,5	45	65	100	225	293	570	718	1280
Distance (mm)	L	110	138	159,5	202	238	275	318	360	458
Distance (mm)	M	148	188	209,5	252	306	343	408	450	534
Hub diameter (gear coupling) (mm)	B4	130,5	158,4	183,4	211,5	275,5	307	367	423	553
Speed max. (rpm)		4000	3900	3700	3550	2750	2420	1950	1730	950
Length (mm)	E2	63,5	78,5	92,5	108	139	154	194	225	296
Flange outside diameter (gear coupling) (mm)	B3	168	200	225	265	330	370	438	525	639
Flange outside diameter (ST portion) (mm)	B1	198	220	270	318	428	459	592	648	740
Axial (mm)		1,5	2,5	2,5	3	4	4	4	5	6
Angular (degree)		2×0,35°	2×0,35°	2×0,35°	2×0,35°	2×0,35°	2×0,35°	2×0,35°	2×0,35°	2×0,35°
Tightening torque of the fastening screws (mm)	F	18	65	65	150	150	220	400	520	670
Adjustment range available from - to (KNm)		0,2-0,5 \| 3xST10 0,5-1,0 \| 6xST10 1,0-1,5 \| 6xST10	0,7-2 \| 3xST15 1,2-4 \| 6xST15 3,2-6 \| 6xST15	2-5 \| 3xST15 4-10 \| 6xST15 6-14 \| 9xST15	6-12 \| 6xST15 9-18 \| 9xST15 15-25 \| 12xST15	12-21 \| 6xST30 22-32 \| 6xST30 32-45 \| 9xST30	11-18 \| 3xST30 22-36 \| 6xST30 30-55 \| 9xST30	24-50 \| 3xST70 45-90 \| 6xST70 80-110 \| 9xST70	25-55 \| 3xST70 50-110 \| 6xST70 80-165 \| 9xST70	100-170 \| 8xST71 160-250 \| 12xST71
Actuation distance (mm)	N	3,5	4,5	4,5	4,5	8	8	10	10	10
Mounting flange outside diameter (ST portion) (mm)	B2	192	209	259	300	399	418	560	618	724
Screw (mm)	F	6xM8	10xM12	12xM12	12xM16	14xM16	14xM18	14xM22	16xM24	22xM24
		2	5	10	25	40	60	100	160	250

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Datasheets
Manuals

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Frequently Asked Questions

How can I place an order with VARIODRIVE?

You can place an order with VARIODRIVE by sending your request to orders@variodrive.nl. Your request will then be processed directly by our internal sales team.

Why should I choose a complete solution from VARIODRIVE?

By choosing VARIODRIVE’s complete solution, you won’t need to worry about integrating different drive components into the machine’s drive chain. We stand behind our complete solution and can guarantee its functionality.

Why should I choose VARIODRIVE's system warranty?

Due to our in-depth knowledge of our products and their integration into applications, we can provide a system warranty. At that point, we guarantee that the application will function using our motion control and traction solutions.

How can I download 3D drawings?

For most products on our website, you can download the 3D files. If the desired 3D file is not available, please contact sales@variodrive.nl, and we will send you the 3D file as soon as possible.

How can I download software?

You can download the necessary configuration software for most products on our website. For a few products, this might not be possible. In such cases, please contact sales@variodrive.nl, and we will assist you as soon as possible.

ST4

Specifications