Packers Kromer Ultra Heavy-Duty Double Spring Model 8251 Spring Balancer
The Packers Kromer Ultra Heavy-Duty Double Spring Model 8251 is a high-capacity spring balancer designed for supporting heavy production tools in the 220–440 lb working-load range. It includes floating rotating suspension, locking safety hook, stepless tension adjustment, quick-change cable, safety drum lock, automatic safety detent, safety chain, exclusive cable limiter, easy load leveling, and easy spring change.
The Packers Kromer Ultra Heavy-Duty Double Spring Model 8251 Spring Balancer is designed for heavy industrial tool support where high-capacity load balancing, safety, and repeatable positioning are critical.
This double spring version of the 8251 family supports heavier tools than the single spring version, covering working loads from 220 lb to 440 lb, depending on the selected model variation. It is intended for production and manufacturing environments where very heavy tools need to remain suspended, balanced, and easy to maneuver during repetitive work.
The broader Packers Kromer balancer line is positioned as a “Zero Gravity” solution for ergonomic placement of production tools. The brochure states that these balancers are used to reduce worker fatigue, safety hazards, and tool damage while improving accuracy and production volume.
The double spring 8251 includes industrial safety and maintenance features such as floating rotating suspension, locking safety hook, recessed safe adjustments, safety drum lock, stepless tension adjustment, quick-change cable, automatic safety detent, safety chain installed, containerized cold rolled spring, exclusive cable limiter, easy load leveling, and easy spring change.
Specifications
| Specification | Detail |
|---|---|
| Model Family | 8251 Double Spring |
| Product Type | Ultra heavy-duty double spring balancer / zero-gravity tool balancer |
| Manufacturer | Packers Kromer |
| Rotation | 360° |
| Clearance | 8 in |
| Safety Hanger Opening | 0.95 in |
| Safety Chain Length | 15 in |
| Safety Chain Rating | 3,880 lb |
| Tool Mounting Point | 0.67 in |
| Depth | 14 in |
| Diameter | 11.6 in |
| Length | 32.2 in |
| Weight | 100 lb |
| Cable Travel | 9.8 ft |
| Cable Extension | 36 in |
| Cable Diameter | 5 mm |
| Suspension | Floating rotating suspension |
| Hook Type | Locking safety hook |
| Tension Adjustment | Stepless tension adjustment |
| Cable Feature | Quick-change cable |
| Safety Features | Safety drum lock, automatic safety detent, safety chain installed, recessed safe adjustments, exclusive cable limiter |
| Spring Feature | Containerized cold rolled spring |
| Service Features | Easy load leveling and easy spring change |
| Best Use Cases |
Ultra heavy production tools, heavy assembly tools, fabrication tools, industrial workstations, manufacturing cells, repetitive heavy-tool handling, and ergonomic suspension of large tools |
Model Variants
| Item No. | Model No. | Working Load |
|---|---|---|
| 196802931 | 8251-8 | 220–253 lb / 100–115 kg |
| 196802941 | 8251-9 | 253–286 lb / 115–130 kg |
| 196802951 | 8251-10 | 286–308 lb / 130–140 kg |
| 196803031 | 8251-11 | 308–330 lb / 140–150 kg |
| 196802961 | 8251-12 | 330–375 lb / 150–170 kg |
| 196802991 | 8251-13 | 375–400 lb / 170–181 kg |
| 196802971 | 8251-14 | 400–420 lb / 181–190 kg |
| 196802981 | 8251-15 | 420–440 lb / 190–200 kg |


