LiftMaster 2100P Standard-Duty Roller-Cage Gate Hinges — Prime-Coated Pair, Flat Mount

The LiftMaster 2100P is a pair of standard-duty steel roller-cage bearing hinges with flat mounting surfaces on both the gate and post sides. The P designation identifies the prime-coated finish. LiftMaster’s hardware guide lists the standard-duty 2100 series for up to 1,000 pounds per pair in an appropriate installation. Select the hinges with the gate frame, post support and mounting geometry in mind. They provide mechanical pivot support and do not include a gate operator or certify the strength of the surrounding structure.

Compatibility — Models, Versions and Exclusions

Select the Mounting Geometry and Evaluate the Structure

The capacity is stated per pair, not per individual hinge or for the gate system as a whole. The gate frame, post, foundation and weld areas must support the actual installation. Gate width and the resulting load on the structure also matter. A new hinge pair does not repair a leaning post, cracked frame or weak foundation.

The flat-mount configuration must suit both mounting surfaces, and the hinge axes must be positioned correctly for smooth travel. Have the installer inspect the layout before removing old hinges. Prime coating identifies the supplied finish; it is not a promise that the completed installation needs no further finish treatment or maintenance. Follow the manufacturer’s bearing lubrication and service guidance for the actual hinge.

Specifications and Product Identification

Before Ordering

• Confirm gate weight, width and construction.
• Inspect the post, foundation, frame and weld areas.
• Verify flat mounting surfaces and clearance through the intended swing.
• Plan safe support, alignment and finishing requirements before removing existing hinges.

Package Contents and Separate Requirements

The offer is a pair of 2100P hinges. A gate, post, operator, mounting reinforcement, welding materials and site support equipment are separate requirements. Confirm the current carton before ordering. This is not a complete bolt-on conversion package, and a shared capacity rating does not make it a dimension-for-dimension substitute for another hinge style.

Safety Warnings — Read Before Installation or Service

• WARNING: A falling or uncontrolled gate can cause serious injury or death. A qualified gate professional must support and secure it before removing any hinge.
• Isolate automated-gate power and prevent movement during structural work. Do not use the operator arm as the gate’s sole support.
• Welding and structural attachment require appropriate training. Follow the manufacturer’s alignment and mounting requirements.
• Verify smooth movement and test all required automation protection before returning the installation to normal service.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate non-contact protection option where approved by the installed gate operator; it does not support the gate.
• LMWEKITU monitored wireless edge kit — a connection system for compatible safety edges and controls; select it independently of the hinge pair.

Frequently Asked Questions

Is the 1,000-pound rating for one hinge?

No. The published rating applies to the pair, with a suitable complete installation.

What does the P suffix mean?

It identifies the prime-coated finish. Other suffixes identify different finishes.

Can it mount directly to any round post?

No universal round-post fit is established. This model has flat mounting surfaces on both sides.

Will the hinge pair fix a leaning gate post?

No. The supporting structure must be repaired and evaluated independently of the hinge replacement.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.