STN

Safety couplings

The STN heavy-duty safety coupling from R+W Couplings features a high clamping force for fixed mounting and is used for both direct and indirect drives. The STN safety coupling has a highly robust, compact, and simple design, as well as highly precise overload protection. This industrial coupling is torsionally rigid and features an integral heavy-duty bearing for support. This safety coupling is applied wherever torque overload occurs. 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 tapered clamp hub
Limiting torque
200 - 165.000 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 STN
Manuals
  • Manual ST koppelingen
STN drawing
Tabel
STN Series2510254060160
Overall lengthA1124,5160210227286318425
Fit length (mm)C1118155147152191218305
Inside diameter range F7 (mm)D145-7040-8065-11070-150110-17080-200140-290
Bore diameter max. Ø F7 with keyway (mm)D16070100140160180270
Fastening threadsH12xM1012xM1212xM1612xM1612xM2012xM2012xM24
Bolt circle diameter ± 0.3 (mm)F162170220260330360570
Bolt circle diameter ST (mm)O154170220270350376532
Outside diameter h7 (mm)G192209259298380418618
Moment of inertia (approx.) D max. + max. sgmnt (10¯³kgm2)771514467893570570030700
Moment of inertia (approx.) D max. + max. sgmnt (10¯³kgm2)15245065166200550
Fastening screw (ISO 4017)K6xM106xM108xM169xM1611xM168xM208xM24
Tightening torque of the fastening screw (Nm)K5959180180180570710
Distance (mm)L1826,5728082,594151
Distance (mm)M5676,5122127151163240
Hub outside diameter (mm)p119136218278322378535
Mounting length (mm)J34689811
Speed max. (rpm)7000600042003800300025002000
Flange outside diameter (mm)B198220270318428459648
Thread depth (mm)I15202530363540
Adjustment range available from - to (KNm)0,2-0,5 | 3xST10 0,5-1,0 | 6xST10 1,0-1,5 | 6xST100,7-2 | 3xST15 1,2-4 | 6xST15 3,2-5 | 6xST152-5 | 3xST15 4-10 | 6xST15 6-14 | 9xST156-12 | 6xST15 9-18 | 9xST15 15-25 | 12xST1512-21 | 6xST30 22-32 | 6xST30 32-45 | 9xST3011-18 | 3xST30 22-36 | 6xST30 35-55 | 9xST3025-55 | 3xST70 50-110 | 6xST70 80-165 | 9xST70
Pilot diameter h7 (mm)E132145170210270300450
Actuation distance (mm)N3,54,54487,510
Effective clamping length (mm)C24582626793,593125
Allowable max. radial force standard* (KN)51020304050100
2510254060160
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Frequently Asked Questions

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.

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.

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.

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.

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.

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