The TECNA 9371 is a zero-gravity tool balancer for loads weighing 198-231 lb. At this capacity the balancer is carrying the entire weight of a heavy powered tool, so the operator is only guiding it.

Zero-gravity means the load stays wherever you leave it instead of returning to a rest position - let go at mid-height and the tool simply hangs there, weightless to the operator. Cable travel is 6.6 ft (2,000 mm) and capacity is adjustable across 198-231 lb (90-105 kg), set with a worm screw. The load is carried by a spring drum inside, which is why balancers like this are also called spring balancers.

It has a manual lock to hold the load at any height: turn the knob to the locked position to stop the drum, and back for normal working. For safety the shutter only releases when it lines up with the drum, so if it does not free straight away, move the load slightly up and down. Only operate the lock with the load hanging.

A centrifugal safety device locks the drum if it ever turns faster than the danger limit - a load coming unhooked, or a cable breaking. If it trips, discharge the drum spring immediately and completely and have the balancer inspected.

If the drum spring ever breaks, a safety device blocks the balancer so the load cannot fall. If it trips, do not try to free it - have the balancer serviced.

Size it on the total hanging weight - the tool, its accessories and the length of hose or cable the balancer lifts - which has to sit inside the capacity range. Electric, pneumatic and hydraulic tools all suspend the same way.

Specifications:

• Capacity: 198-231 lb (90-105 kg), adjustable by worm screw
• Cable travel: 6.6 ft (2,000 mm)
• Unit weight: 39.18 lb (17.77 kg)
• Ambient temperature: 41 to 140 F (5 to 60 C)
• Stainless steel cable
• Ribbed and sealed aluminium alloy body
• Safety suspension
• Manual lock to hold the load at any height
• Safety device against load dropping due to spring breakage
• Centrifugal safety device
• Adjustable stroke limiting device
• Taper drum rotating on ball bearings
• Cable guide in antifriction material
• Rotary upper hook with ball bearing
• Inert spring drum assembly
• Polyamide thimble

Extension cables are available if the balancer has to hang higher than the load needs to reach: 1.6 ft (500 mm, 72968/0,5), 3.3 ft (1,000 mm, 72968/1), 8.2 ft (2,500 mm, 72968/2,5), 9.8 ft (3,000 mm, 72968/3) and 16.4 ft (5,000 mm, 72968/5), stainless steel 4 mm cable with a 100 mm carabiner.

Options for this model: Option B, the lock and unlock control you work from floor level, is ordered as the TECNA 9371.B - the balancer built with it. The handle and chain itself is also sold on its own as TECNA 70084. Option RI is TECNA 70477, the insulated rotary hook: it electrically insulates the hanging load - welding gear, for instance - and lets the tool turn without twisting the cable. TECNA also builds this model as the 9371G, with a rubber-covered aluminium body, to order.

The structure you hang it from has to be stronger than five times the balancer weight plus the maximum load - and if several balancers share one structure, five times the total of all of them, each on its own independent connection point. Always connect the safety suspension to a separate support, and set the stroke limiter so the load never comes to rest above the operator.

Made in Italy, to DIN 15112. Breaking load is guaranteed at a minimum of five times the declared maximum load on every sensitive part. Every production lot is sample-tested too: a static test at 1.25 times the maximum rated load held for ten minutes at full stroke, and a dynamic test at 1.1 times maximum load run for an hour.

Other capacities in the 9361-9371 series: 9361 (22-33 lb), 9362 (33-44 lb), 9363 (44-55 lb), 9364 (55-66 lb), 9365 (66-77 lb), 9366 (77-99 lb), 9367 (99-121 lb), 9368 (121-143 lb), 9369 (143-165 lb), 9370 (165-198 lb).

Browse all zero-gravity balancers.

Supported in the USA by Tool Balancers USA.