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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
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