Hager 550 Heavy Weight Rack and Pinion Pivot Set for 1-3/4" Doors
Professional Center-Hung Pivot Solution for Heavy Commercial Doors
The Hager 550 Single Acting Heavy Weight Rack and Pinion Pivot provides reliable center-hung support for commercial doors up to 150 lbs. and 3' x 7' (914mm x 2134mm) dimensions. Designed for 1-3/4" (44mm) door thickness with full mortise installation, this heavy-duty pivot system delivers smooth operation through precision rack and pinion mechanics. Manufactured to ANSI/BHMA A156.1 standards with zinc-plated steel construction for lasting commercial performance.
Professional Features & Benefits
- Heavy-Duty Load Capacity: Supports doors up to 150 lbs. with maximum dimensions of 3' x 7' (914mm x 2134mm) for demanding commercial applications.
- Precision Rack and Pinion Operation: Single acting heavy weight design provides smooth, controlled door movement with reliable mechanical advantage.
- Full Mortise Installation: Both leaves mortise into door and frame for clean, professional appearance and maximum strength.
- Standard Door Thickness Compatibility: Engineered for 1-3/4" (44mm) door thickness with consultation available for other thicknesses.
- Center-Hung Mounting: Top and bottom pivot configuration distributes weight evenly for balanced door operation.
- Durable Construction: Zinc-plated steel substrate provides corrosion resistance and long-term reliability in commercial environments.
- ANSI Compliance: Manufactured in accordance with ANSI/BHMA A156.1 standards for commercial door hardware performance.
- Professional Installation Support: Includes plastic cinch anchors and wood fasteners (1-1/4 x 12 F.H.) with machine fasteners available upon request.
Technical Specifications
- ANSI/BHMA: ANSI A2792
- Applications: Standard Door
- Commercial/Residential: Commercial
- Door Thickness: 1-3/4" (44 mm);
- Duty Level: Heavy Duty
- Electronic: No
- Fastener Size - Machine: upon request;
- Fastener Size - Wood: 1-1/4 x 12 F.H.;
- Finishes: US26D;
- Fire Rating: No
- Lock Type: Mortise
- Maximum Door Length: 7' (2134 mm);
- Maximum Door Weight: 150 lbs.;
- Mounting Method: Center Hung
- Notes: Not to exceed 3' x 7' (914mm x 2134mm);
- Pivot Type: Top & Bottom
- Subcategory: Reinforcing Full Surface Hinges
Installation & Operation
- Review manufacturer specifications and verify door preparation requirements including 1-3/4" (44mm) door thickness and maximum 3' x 7' (914mm x 2134mm) door dimensions.
- Ensure frame does not have door stop at head and pivot jamb as required for proper pivot operation.
- Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for full mortise installation.
- Prepare door and frame by drilling required holes and routing mortise pockets as specified in manufacturer instructions.
- Install pivot hardware using provided plastic cinch anchors and 1-1/4 x 12 F.H. wood fasteners, or request machine fasteners for metal frame applications.
- Adjust rack and pinion mechanism for proper alignment and smooth operation throughout the full range of door movement. Test with door weight up to 150 lbs. capacity and make final adjustments as needed.
Professional Applications
- Commercial Office Buildings
- Educational Facilities
- Healthcare Institutions
- Retail Establishments
- Industrial and Warehouse Facilities
- Multi-Tenant Residential Properties
- Government and Municipal Buildings
Why Choose Hager Quality?
Hager pivot systems deliver professional-grade reliability with zinc-plated steel construction and precision rack and pinion mechanics rated for 150 lb. door capacity. Manufactured in accordance with ANSI/BHMA A156.1 standards, Hager products meet or exceed industry requirements for commercial door hardware. Engineered for demanding commercial applications where dependable heavy-duty performance and smooth operation are essential.
Support Resources
Manufacturer Resources
Product Specs
- Product Group:
- Door Hinges and Pivots
- Product Subgroup:
- Pivots and Pivot Sets
- Product Type:
- Pivots - Center Hung
- Subcategory:
- Reinforcing Full Surface Hinges
- ANSI/BHMA:
- ANSI A2792
- Commercial/Residential:
- Commercial
- Lock Type:
- Mortise
- Duty Level:
- Heavy Duty
- Electronic:
- No
- Pivot Type:
- Top & Bottom
- Mounting Method:
- Center Hung
- Application:
- Standard Door
- Product Attribute:
- Pivots
- Product Model:
- 550
- Door Thickness Range:
- 1-3/4"
- Fire Rating:
- No
- Product Category:
- Door Hinges and Pivots
- Product Substrate:
- Zinc-plated steel
- Department:
- Door Hardware