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  4. NORMA® hose clamps


The hose clamps with worm gear drive according to DIN 3017 are especially suitable for applications of high mechanical load. Thanks to continuous further development, this hose clamp sets the benchmark for modern clamp construction.


High clamping force and fracture torque


Compared to competitive products, NORMACLAMP® TORRO® is characterised by high clamping forces. Assembly security is ensured by high fracture torques.
By constructive modifications, the even distribution of clamping force has been further improved. The clamp is perfectly fitted to the hose and ensures optimised sealing behaviour.

Technical data

Corrosion resistance

MaterialCorrosion resistance
W1Min. 144 h
W4Min. 240 h

Band stamping

Band widthMaterialStamping
9 mmW1with smooth inside of band
W4with stamped inside of band
12 mmW1with smooth inside of band
W4with stamped inside of band

Clamping ranges

according to DIN 3017 = 8 - 16 mm to 170 - 190 mm


W1 = all parts steel zinc plated (chrome-free (VI))
W4 = all parts stainless steel 1.4301

Your benefits


Improved asymmetric housing constructionEven force distribution and safe assembly
Screw support bearingEasy assembly due to safe band guide
Material and clamping range stampPrevention of mix-ups
Asymmetric extensionNo escaping of the clamp head upon tightening
Short housing saddleContact pressure for improved sealing behaviour
Inside of band smooth or stampedOptimal hose protection

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