A. BEFORE ordering a replacement button make sure it fits your button pouch/basket.


Best is to send us one of your pouches so we can make sure our Torpedo Button fits.
Many pouches or button systems are third party sourced and may not fit your OEM Button.

It is very important to make sure that the top eye fits the socket pouch/basket.

B. These Unirope Torpedo Buttons comply to EN 13411-4 and, in addition, have been Fatigue Type Tested to 75,000 cycles.

C. These buttons are for Non-Roating ropes ONLY.
Reason: Regular ropes start to rotate under load which may rotate the button inside the crane pouch causing to unlay 4-6-7-8-9-10 strand or any “regular’ lay wire rope.

D. Our Torpedo buttons are NOT INTENDED FOR RESALE and can NOT be purchased as stand alone items. The socketing procedures are different from standard spelter sockets and must be done by trained and certified UNIROPE installers.

E. In compliance with ASTM B30.30 (ROPES), CSA Z150-16 (Mobile Cranes) and CSA Z 248-17 (Tower Cranes) each button installed at Unirope’s facilities is PROOF TESTED to 40% of the rope’s Minimum Breaking Strength.

F. EACH button has a unique serial number stamped into them.

G. Our Torpedo Buttons are made 100% by Unirope from alloy tool steel, stress relieved and then hardened to over RC40.

H. Unirope Torpedo Buttons are NOT permitted to be re-used.


Torpedo Button Installation


Proof test equipment (Edmonton)


All Buttons are made by us