STF

Safety couplings

The STF heavy duty safety coupling from R+W Couplings has mounting flanges on both sides. The STF safety coupling has a very robust, compact and simple design, and a very accurate overload protection. This industrial coupling is torsionally rigid and has an integral heavy duty bearing for support. This safety coupling is used wherever torque overload occurs. The maximum torque of the industrial coupling can also be adjusted manually with an adjustment key. This key can be ordered separately. For specific questions about safety couplings or other industrial couplings, please contact VARIODRIVE.

Performance

Torque limiter with flange mounting

Limiting coupler

200 - 45.000 Nm

Speed

that's 9000 rpm

Temperature range

-30 to +120 oC

Material

Reinforced nitro-carburised steel

Safety elements

Safety elements

Backlash

None

Service-life

No service

Optional

ATEX, adjusting key, adjusting plate

Datasheets

ATEX instructies
Uitleg veiligheidssystemen
Datasheet STF

Manuals

Manual ST koppelingen

Tabel

STF Series		2	5	10	25	40
Overall length	A	190	230	250	280	320
Fastening threads (mm)	F2	8xM12	8xM14	8xM16	12xM18	16xM20
Bolt circle diameter (mm)	Fl	130	155,5	196	220	304
Bolt circle diameter (mm)	F2	130	155,5	196	270	350
Moment of inertia (approx.) D max. + max. sgmnt (10-3 kgm2)	J.kst	83	150	380	830	3300
Moment of inertia (approx.) D max. + max. sgmnt (10-3kgm2)	m.kst	20	30,4	50,3	73	180
Distance (mm)	L	45	63,5	75	83,5	105,5
Distance (mm)	M	83	113,5	125	124,5	165
Mounting length (mm)	J1	3	4	5	5	6
Mounting length (mm)	J2	2,5	3	3,5	4	4
Speed max. (rpm)		9000	7500	6300	5000	3600
Flange outside diameter (mm)	B2	170	118	230	306	390
Flange outside diameter (mm)	B	198	220	270	318	428
Flange outside diameter (mm)	B1	170	188	230	268	340
Wall thickness (mm)	I	14	17,5	20	22	25
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 3,2-56xST15	2-5 \| 3xST15 4-10 \| 6xST15 6-14 \| 9xST15	6-12 \| 6xST15 9-18 \| 9xST15 15-25 \| 12xST15	12-21 \| 3xST31 22-32 \| 6xST31 32-45 \| 9xST31
Pilot diameter h7 (mm)	D1	90	110	140	174	210
Pilot diameter h7 (mm)	D2	90	110	140	200	210
Actuation distance (mm)	0	3,5	4,5	4,5	4,5	7,5
Allowable max. radial force standard* (KN)		7	12	17	22	30
Through hole diameter (mm)	F1	8xØ13	8xØ15	8xØ17	12xØ19	16xØ22
		2	5	10	25	40

Downloads

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Datasheets
Manuals

Datasheets
Datasheets
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.

STF

Specifications