
3 arm Series 4 – ergonomic tool balancer arm with full movement freedom and access to difficult positions
3 arm Series 4 by Tecnospiro offers an ergonomic solution for fastening, lifting and tool work, with a weightless feel up to 70 kg.
The system is designed to improve operator safety and comfort, reduce fatigue and injury, and increase productivity in continuous, precise work.
| Property | Value |
|---|---|
| Vertical reach | 1,340 mm |
| Horizontal reach | 1,555 mm |
| Max. capacity | 24 kg / 53 lbs |
| Rear Arm (Bottom/Top Mounted) | Front Arm | A (mm/in) | B (mm/in) | C (mm/in) | D (mm/in) | E (mm/in) | F (mm/in) | Capacity (kg) | Lbs |
|---|---|---|---|---|---|---|---|---|---|
| SN/ST | DS | 610 | 510 / 20.1″ | 1,220 / 48.0″ | 671 / 26.4″ | 347 / 13.7″ | 1,017 / 40.0″ | 21 | 43 |
| SN/ST | DM | 730 / 28.7″ | 630 / 24.8″ | 1,460 / 57.5″ | 832 / 32.7″ | 506 / 19.9″ | 1,338 / 52.7″ | 24 | 53 |
Dimensional drawing of the arm; middle joint 100 mm.

| Head | Vertical (Vert) | Horizontal (Horiz) | Any Angle (Ang) |
|---|---|---|---|
| BA | 300 Nm (221 ft-lb) | 250 Nm (184 ft-lb) | X |
| D / EA / EC / EE | 120 Nm (89 ft-lb) | 120 Nm (89 ft-lb) | 120 Nm (89 ft-lb) |
| R / RS / RA / RAS / RB / RBS / RC / SR | 300 Nm (221 ft-lb) | 250 Nm (184 ft-lb) | 200 Nm (148 ft-lb) |
X – the head is not rated for any-angle torque work.
Torque work in vertical (Vert), horizontal (Horiz) and any-angle (Ang) orientations.

| Image | Code | Brake Type |
|---|---|---|
![]() | L00 | No Brakes |
![]() | L11 | Manual |
![]() | L22 | Pneumatic |
![]() | L50 | Manual Locking base |
![]() | L92 | Tool Trigger Activated |
| Code | Head Member | Torque |
|---|---|---|
| B | Vertical Flat | ✔ |
| BA | Vertical with Ring | ✔ |
| C | Vertical Adjustable | – |
| E | Flat Articulated | – |
| EA | Articulated with Ring | ✔ |
| ED | Pneumatic Flat Articulated | – |
| F | Articulated Adjustable | – |
| GA | Quick Change | – |
| H | Heavy-Duty Applications | – |
| J | Magnetic Articulated Drill | – |
| K | Universal Strap | – |
| L | Adjustable Ball and Socket | – |
| LA | Vertical Pneumatic Ball and Socket | – |
| LB | Horizontal Adjustable Ball and Socket | – |
| LC | Horizontal Pneumatic Ball and Socket | – |
| M | Constant Pressure Support | – |
| N | Multiposition Articulated | – |
| P | Double Articulated Flat | – |
| Q | Heavy-Duty Multiposition Articulated | – |
| R | Revolver | ✔ |
| RA | Swing Revolver | ✔ |
| RAS | Swing Revolver Auto | ✔ |
| RB | Revolver Pistol | ✔ |
| RBS | Revolver Pistol Auto | ✔ |
| RC | Vertical & Horizontal | – |
| RS | Revolver Auto | ✔ |
| SN | Giraffe Multiposition | – |
| SR | Giraffe Revolver | ✔ |
| T | Multiposition Articulated Pistol | – |
| U | Heavy-Duty Multiposition Articulated Pistol | – |
| W | Vertical Bar | – |
| WA | Vertical Bar with Pneumatic Brake | ✔ |
| WC | Vertical Bar with Brake | – |
| Z | Fork | – |
✔ – head rated for torque work (see the torque recommendations table).
What applications is Series 4 suitable for?
It is suitable for tool work that requires weight balancing, free movement, high safety and ergonomic precision.
What is the main benefit of the arm in daily work?
The arm helps reduce fatigue and injury, supports safer operation, and improves operator productivity.
Can the system be adapted to different needs?
Yes, there are more than 45 head systems, over 1,000,000 combinations, and all five brake options are available.
The HADI Technologies team will help you select the right configuration, verify application requirements and provide technical information about Ergonomic Tool Balancer Arm - 3 arm Series 4.
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3arm · Ergonomic Assistive Solutions for Assembly and ManufacturingThe right solution starts with a clear brief
The HADI product development and engineering team can adapt a tool, product or system to your application.
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