JSZ Brake Wheel Grid Coupling
The JSZ Brake Wheel Grid Coupling integrates a brake drum directly into the grid coupling hub, combining torque transmission and braking in a single compact unit. Available in 8 sizes from 125 to 9,000 N·m with brake drum diameters from 160 to 710 mm, it is purpose-built for crane, hoist, and conveyor applications requiring shoe-type braking.
JSZ Brake Wheel Grid Coupling – Integrated Brake Drum and Serpentine Spring Coupling
The JSZ Brake Wheel Grid Coupling merges two essential mechanical functions into a single assembly: flexible torque transmission via serpentine spring technology, and mechanical braking via an integrated brake drum (wheel). By building the brake drum directly into one of the coupling hubs, the JSZ eliminates the need for a separate brake drum, coupling adapter, and associated alignment procedures – reducing drivetrain complexity, axial length, and maintenance burden.
Designed specifically for applications that require shoe-type (external band or shoe) braking, the JSZ is available in 8 sizes from JSZ1 (125 N·m, 160 mm drum) to JSZ8 (9,000 N·m, 710 mm drum). The serpentine spring core delivers the same vibration damping and overload protection as all grid coupling variants, while the precision-machined brake drum surface ensures consistent braking torque and even drum wear.
Fig. 1 – JSZ Brake Wheel Grid Coupling product assembly
Integrated Design Advantages
Combined Function, Reduced Parts
One unit replaces a separate coupling plus brake drum assembly, cutting part count, procurement complexity, and installation time by approximately 40%.
Precision Brake Drum Surface
The drum (D₀) is machined to tight concentricity and surface finish tolerances, ensuring uniform brake shoe contact and predictable stopping performance.
Dual Shaft Bore Capability
The driving side (d₁) and brake/driven side (d₂) support independent bore diameters, accommodating different shaft sizes on the motor and driven equipment.
Shoe Brake Compatibility
Designed to pair with standard industrial shoe brakes (external contracting type) commonly used on cranes, hoists, winches, and conveyor take-up drives.
Torsional Damping Under Braking
The serpentine spring absorbs the torsional shock generated during emergency stops and brake applications, protecting gearbox teeth and shaft connections from impact damage.
Compact Axial Envelope
Integrating the brake drum into the coupling hub reduces overall drivetrain length by 50–120 mm compared to separate drum-plus-coupling arrangements.
Fig. 2 – JSZ Brake Wheel Grid Coupling cross-section and dimensional drawing
Technical Specifications – JSZ Brake Wheel Grid Coupling
All 8 models with brake drum dimensions, dual bore ranges, and mechanical parameters. Bore listings show driving side (d₁) and brake/driven side (d₂) separated by slashes.
Fig. 3 – JSZ Brake Wheel Grid Coupling complete dimensional reference
| Model | Nominal Torque Tn (N·m) |
Max Speed (rpm) |
Drum D₀ (mm) |
Drum Width B (mm) |
Drive Bore d₁ (mm) | Brake Bore d₂ (mm) | Bore Length L (mm) |
C (mm) | Weight (kg) |
Lubricant (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| JSZ1 | 125 | 3,820 | 160 | 65 | – / 20–50 | 12–19 / 20–50 | 54 | 3 | 10.44 | 0.085 |
| JSZ2 | 250 | 2,870 | 200 | 70 | – / 20–56 | 16–19 / 20–56 | 76 | 3 | 23.61 | 0.142 |
| JSZ3 | 355 | 2,300 | 250 | 90 | 25, 28 / 30–56 / 60, 63 | – / 60–71 | 82 | – | 28.6 | 0.17 |
| JSZ4 | 1,000 | 1,730 | 315 | 110 | 25, 28 / 30–75 / 80, 85 | – / 80–95 | 95 | – | 59.93 | 0.284 |
| JSZ5 | 1,400 | 1,350 | 400 | 140 | 25–38 / 40–56 / 60–100 | 50, 55, 56 / – | 98 | 5 | 85.81 | 0.34 |
| JSZ6 | 2,800 | 1,145 | 500 | 180 | 40–56 / 60–95 / 100–125 | – / 100–125 | 124 | – | 144.37 | 0.681 |
| JSZ7 | 5,600 | 915 | 630 | 225 | 60–75 / 80–140 / 150, 160 | 75 / 150 | 130 | – | 255.6 | 1.248 |
| JSZ8 | 9,000 | 820 | 710 | 255 | 75–95 / 100–180 / 190, 200 | – / 190, 200 | 190 | 6 | 485.33 | 3.632 |
Application Fields
Overhead & Gantry Cranes
Hoisting and travel drives on overhead bridge cranes, gantry cranes, and portal cranes where shoe brakes provide fail-safe holding and controlled deceleration of lifted loads.
Mine Hoists & Winches
Underground and surface mine hoisting systems where the integrated brake drum reduces the number of rotating components exposed to dust, moisture, and vibration.
Conveyor Systems
Take-up drives, tripper drives, and inclined conveyor systems requiring controlled stopping to prevent belt rollback and material spillage during emergency shutdowns.
Stage & Theater Machinery
Fly systems, turntable drives, and scenic hoists in performance venues where smooth, silent braking and vibration-free torque transmission are audience-facing requirements.
GBC grid coupling product range – engineered for reliability across all industrial sectors
Project References
★★★★★ – Container Port, United Kingdom
Industry: Port & Logistics | Application: Ship-to-Shore Crane Hoist
“We standardized on JSZ7 couplings for the hoist drives on four new STS cranes handling 40-foot containers at 65 tonnes. The integrated brake drum eliminated a separate drum coupling that was a persistent maintenance headache. After 20,000 operating hours, brake drum runout remains within 0.05 mm and there has been zero unplanned downtime related to the coupling or brake drum interface.”
– Crane Engineering Manager, Felixstowe Terminal
★★★★★ – Automotive Plant, South Korea
Industry: Automotive Manufacturing | Application: Overhead Conveyor Chain Drive
“Our body shop overhead conveyors use JSZ3 couplings with shoe brakes for zone-stop control. The coupling handles over 800 start-stop cycles per day. Vibration at the gearbox output bearing decreased by 31% compared to the previous rigid coupling plus separate drum arrangement.”
– Conveyor Systems Engineer, Ulsan Assembly Plant
★★★★☆ – Copper Mine, Chile
Industry: Mining & Minerals | Application: Underground Skip Hoist
“We deployed JSZ8 couplings on two skip hoist drives at 9,000 N·m. The 710 mm brake drum provides excellent braking surface area for our dual-shoe safety brakes. The only improvement we would request is a corrosion-resistant drum coating option for our high-humidity underground conditions.”
– Hoist Maintenance Superintendent, Atacama Operations
Frequently Asked Questions
Order JSZ Brake Wheel Grid Couplings
GBC supplies JSZ brake wheel grid couplings with independent dual-bore machining, precision drum turning, and complete brake drum dimensional certification. From single crane upgrades to fleet-wide standardization programs, every coupling ships ready for immediate installation.
Request a JSZ Quote
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Response within 24 hours | Custom bores available
The JSZ Brake Wheel Grid Coupling integrates a brake drum directly into the grid coupling hub, combining torque transmission and braking in a single compact unit. Available in 8 sizes from 125 to 9,000 N·m with brake drum diameters from 160 to 710 mm, it is purpose-built for crane, hoist, and conveyor applications requiring shoe-type braking.
