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Romãnä

4B - Tackle blocks

 

4B - Tackle block - 300 Wheels - 1 nylon wheel + ball bearingsØ 35 mm Races - 1 race Frame - made of black nylon + stainless steel Max. load - 300 kg For ropes - textile fibre Ø 8 mm
Vezi toate
4B - Tackle block - 400 Wheels - 1 nylon wheel + ball bearingsØ 45 mm Races - 1 race Frame - made of black nylon + stainless steel Max. load - 400 kg For ropes - textile fibre Ø 10 mm
4B - Tackle block - 400 4B - Tackle block - 300
4B - Tackle block - 4002 Wheels - 2 nylon wheels + ball bearingsØ 45 mm Races - 2 races Frame - made of black nylon + stainless steel Max. load - 400 kg For ropes - textile fibre Ø 10 mm
4B - Tackle block - 4003 Wheels - 3 nylon wheels + ball bearingsØ 45 mm Races - 3 races Frame - made of black nylon + stainless steel Max. load - 400 kg For ropes - textile fibre Ø 10 mm
4B - Tackle block - 600 Wheels - 1 nylon wheel + ball bearingsØ 25 mm Races - 1 race Frame - made of stainless steel Max. load - 600 kg For ropes - - textile fibre Ø 2,5 mm- steel Ø 2,5 mm
Compagnia Finzi Pasca, ''La verità'' Cortina cu deschidere italiana made of HLU - Textil Lucilla and of white ASC - Sceno muslin.Thanks to their low weight, the curtain made of HLU - Textil Lucilla weighed about 10 kg, their manual handling systems were made with 4B - Tackle blocks of the type 400 and 4002 and 3C - Franghie de canepa Ø 10 mm.
Detail of the manual handling system of a modest sized Cortina citaliană.The double 3E - Franghie Poly on the side of the maneuver uses a 4B - Tackle block of the type 4002, while the return to the opposite corner of the curtain uses the type 400.
The 4B - Tackle blocks are small pulleys equipped with a quick coupling device.
They are mainly used for the return of textile ropes or, only some models and more rarely, for wire ropes.
Due to the small diameter of the pulleys, which allows only a low ratio with the rope diameter, they are intended exclusively for manual maneuvers and light loads.
In scenography they are often used, together with other devices, to carry out the manual maneuvers of:
Cortina cu deschidere italiana
Cortina cu deschidere tip fluture si ghilotina
Cortina cu deschidere prin pliere pe spate
Cortina cu deschidere prin pliere pe față
Cortina cu deschidere romana
Cortina cu deschidere venetiana
Cortina cu deschidere austriaca
sometimes even of large dimensions but of low weight.
The cases in which they are used in the construction of simple machines that exploit the principle of mechanical advantage are an exception.
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Compagnia Finzi Pasca, ''La verità''

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