Radius Corner Hinges

Radius Corner Hinges for Interior & Entry Doors

Radius corner hinges use rounded leaf corners designed to fit matching rounded mortises in the door and frame. They are especially useful for replacement projects where the existing door is already prepared for a 1/4-inch or 5/8-inch radius hinge, allowing shoppers to match the original cutout without changing to a square-corner hinge.

Coastal Hardware Store carries radius corner door hinges from Emtek, Deltana, and Baldwin Estate. The current collection includes 1/4-inch and 5/8-inch radius options in residential-duty, heavy-duty, plain-bearing, ball-bearing, and selected spring-hinge configurations. Available products include common 3-1/2-inch x 3-1/2-inch and 4-inch x 4-inch sizes along with a broad range of hardware finishes. For additional configurations, browse our complete door hinge collection or compare square corner hinges.

Why Choose Radius Corner Hinges?

Radius hinges are primarily about matching the door and frame preparation correctly. When the existing mortise already has rounded corners, choosing the same radius can simplify a replacement and help the new hinge sit properly within the prepared recess.

• Designed for rounded mortises: Radius corner hinges match door and frame cutouts with rounded rather than square corners.
• 1/4-inch and 5/8-inch choices: The current collection includes both common radius sizes so shoppers can match different existing preparations.
• Replacement-friendly sizing: Current products include commonly used 3-1/2-inch x 3-1/2-inch and 4-inch x 4-inch hinge dimensions.
• Multiple bearing types: Shoppers can compare plain-bearing and ball-bearing hinges according to the selected door and duty requirements.
• Residential and heavy-duty options: The collection includes products intended for typical residential use as well as selected heavier-duty applications.
• Extensive finish coordination: Available finishes can be coordinated with nearby knobs, levers, handlesets, deadbolts, door stops, and other visible hardware.

Types of Radius Corner Hinges Available

1/4-Inch Radius Corner Hinges

A 1/4-inch radius hinge has a tighter rounded corner than a 5/8-inch radius model. Current Coastal Hardware Store products include 1/4-inch radius hinges from Emtek and Deltana in several residential-duty, heavy-duty, plain-bearing, ball-bearing, and spring configurations. When replacing an existing hinge, match the radius shown by the door and frame mortises rather than choosing the corner shape based on appearance.

5/8-Inch Radius Corner Hinges

A 5/8-inch radius produces a broader rounded corner and is another common preparation represented throughout the collection. Current 5/8-inch products include Emtek residential and heavy-duty hinges, Deltana residential and heavy-duty ball-bearing hinges, and Baldwin Estate radius-corner hinges. A 5/8-inch hinge should be installed into a corresponding 5/8-inch-radius mortise unless the door and frame are being intentionally modified.

Plain-Bearing Radius Hinges

Plain-bearing hinges use a conventional pin-and-knuckle arrangement without separate ball bearings. Current Emtek radius-corner products include residential-duty and heavy-duty plain-bearing models in steel and solid brass. Plain-bearing hinges can be appropriate for many door applications, but door weight, size, frequency of operation, and manufacturer specifications should guide the final selection.

Ball-Bearing Radius Hinges

Ball-bearing hinges incorporate bearings within the knuckle assembly to reduce friction as the door moves. Current radius-corner products include heavy-duty Emtek ball-bearing hinges and both residential and heavy-duty Deltana ball-bearing configurations. These products can be useful where the door or usage level calls for a different hinge construction than a conventional plain-bearing design.

Radius Corner Spring Hinges

The current assortment also includes Emtek plated-steel UL-listed spring hinges with both 1/4-inch and 5/8-inch radius corners. A spring hinge applies closing force to the door rather than functioning only as a free-swinging hinge. The UL listing applies to the specified spring-hinge products and should not be generalized to every hinge in this collection or treated as a rating for the complete door assembly.

How to Choose the Right Radius Corner Hinge

Start with the existing hinge mortise and door requirements, then narrow the selection by radius, hinge size, duty level, bearing type, material, and finish. Radius is only one part of hinge compatibility.

• Identify the corner radius: Determine whether the door and frame are prepared for a 1/4-inch radius or 5/8-inch radius hinge. If you are unsure, compare the existing hinge or mortise with the manufacturer's dimensional information.
• Measure hinge height and width: Confirm both dimensions, such as 3-1/2 inches x 3-1/2 inches or 4 inches x 4 inches. Do not assume every door using the same radius also uses the same hinge size.
• Compare the screw pattern: Screw-hole quantity and arrangement can differ by hinge size and manufacturer. Matching the overall dimensions does not always guarantee that old screw holes will align.
• Choose the appropriate duty level: Door weight, width, thickness, frequency of use, and the number of hinges installed can influence whether a residential-duty or heavy-duty product is appropriate.
• Select plain or ball bearing: Bearing construction affects how the hinge is built and operates. Follow the manufacturer's application guidance rather than assuming ball bearing is required on every door.
• Coordinate the exact finish: Use the manufacturer's complete finish name when matching hinges with other visible door hardware, particularly when products from several brands are being compared.

Materials, Styles & Finishes

Material construction varies within the radius-corner hinge collection. Current Emtek products include steel and solid-brass hinges, while current Deltana radius products include steel construction. Baldwin Estate products use their own manufacturer specifications. When material, hinge thickness, pin construction, or screw type is important to the project, review the exact product rather than applying one specification to the entire collection.

The visual style of a radius hinge is generally understated because compatibility and mechanical function are the primary considerations. The most noticeable differences are corner radius, hinge size, finish, knuckle and bearing construction, screw pattern, and the appearance of the hinge when the door is open or closed.

Current collection filters include Antique Brass, Antique Nickel, Brushed Brass, Brushed Chrome, Brushed Nickel, Flat Black, French Antique, Lifetime Polished Brass, Lifetime Polished Nickel, Lifetime Satin Brass, Lifetime Satin Nickel, Medium Bronze Patina, Oil Rubbed Bronze, Paint Black, Pewter, Polished Brass, Polished Chrome, Satin Black, Satin Brass, Satin Nickel, Tumbled White Bronze, Unlacquered Brass, Venetian Bronze, and Vintage Brass.

Finish names are manufacturer-specific. Oil Rubbed Bronze, Polished Chrome, Satin Nickel, or another similarly named finish can vary in color, sheen, texture, and aging characteristics between Emtek, Deltana, and Baldwin Estate. For the closest visual coordination, use the same manufacturer and exact finish where practical.

Featured Radius Corner Hinge Brands

The current Coastal Hardware Store collection includes Emtek, Deltana, and Baldwin Estate. Each brand offers a different combination of corner radii, bearing types, duty levels, materials, sizes, and finishes.

• Emtek: Emtek represents the largest portion of the current collection, with 1/4-inch and 5/8-inch radius hinges across residential-duty, heavy-duty, plain-bearing, ball-bearing, steel, solid-brass, and spring-hinge configurations.
• Deltana: Current Deltana products include residential and heavy-duty ball-bearing hinges with 5/8-inch radius corners as well as a heavy-duty 1/4-inch-radius hinge. Current verified Deltana radius products use steel construction.
• Baldwin Estate: The current assortment includes Baldwin Estate 1135 and 1140 5/8-inch radius-corner hinges in 3-1/2-inch x 3-1/2-inch and 4-inch x 4-inch sizes with multiple Estate finish options.

Installation & Compatibility

Radius corner hinges should match the mortise in both the door and frame. Before removing the existing hardware, measure the hinge height, width, and radius and note the screw-hole pattern. A hinge that matches only the height and width may still require modification if the corner radius or screw layout differs.

If the existing mortise has square corners, a radius-corner hinge may leave gaps at the corners or require the door and frame preparation to be altered. Likewise, installing a 1/4-inch-radius hinge into a 5/8-inch-radius mortise—or the reverse—can prevent the leaf from seating correctly. For the easiest replacement, match the original corner preparation.

Hinge thickness should also be reviewed. Different manufacturers and duty levels can use different leaf thicknesses. A replacement that is substantially thicker or thinner than the original hinge can affect how the door sits within the frame even when the height, width, and radius are correct.

Spring hinges, heavy doors, exterior doors, oversized openings, and regulated or rated door assemblies may require additional specification beyond the corner radius. Confirm hinge quantity, duty level, bearing type, door material, screw requirements, listings, and any applicable project requirements before installation.

Shipping & Warranty Information

• Shipping: Shipping time varies by product. Coastal Hardware Store's current policy states that Quick Ship products usually leave the warehouse in 2-3 business days, while other products average 5-7 business days unless another estimate appears on the individual product page. Current radius-corner listings include products showing both 2-3-day and 5-7-day fulfillment times. Orders of $100 or more qualify for free standard ground shipping within the contiguous 48 states and Washington, D.C. View Shipping Policy.
• Warranty: No single warranty applies to every radius corner hinge in this multi-brand collection. Warranty duration, material and workmanship coverage, finish coverage, purchaser eligibility, exclusions, and commercial-use provisions vary among Emtek, Deltana, and Baldwin Estate. Review the individual product page and current manufacturer warranty for the exact hinge being considered.

Frequently Asked Questions About Radius Corner Hinges

What is a radius corner hinge?

A radius corner hinge has rounded corners on its leaves rather than square 90-degree corners. It is designed to fit a door and frame mortise prepared with the corresponding rounded corner shape.

What is the difference between a 1/4-inch and 5/8-inch radius hinge?

The measurement describes the radius of the rounded corner. A 1/4-inch radius has a tighter curve, while a 5/8-inch radius has a broader curve. Match the hinge to the existing door and frame preparation rather than treating the two sizes as interchangeable.

How do I determine the radius of my existing hinge?

Inspect the rounded corner of the existing hinge and mortise and compare it with the manufacturer's 1/4-inch and 5/8-inch radius drawings or a radius reference. Also record the hinge height and width, since radius alone does not identify the correct replacement.

Can I replace a square-corner hinge with a radius-corner hinge?

Not as a direct like-for-like replacement unless the door and frame preparation is compatible. A square mortise and rounded hinge leaf have different corner shapes, so modification may be required. Matching the existing corner style is usually the simplest replacement approach.

Should I choose a plain-bearing or ball-bearing radius hinge?

It depends on the door and hinge specifications. Plain-bearing hinges use a conventional pin-and-knuckle design, while ball-bearing hinges incorporate bearings to reduce friction. Consider door weight, size, frequency of use, duty level, and the manufacturer's recommendations for the exact product.

What sizes of radius corner hinges are available?

The current Coastal Hardware Store collection includes 3-1/2-inch x 3-1/2-inch and 4-inch x 4-inch radius-corner hinges. Available radius, material, bearing type, duty level, and finish combinations differ by product.

Shop Radius Corner Hinges at Coastal Hardware Store

Coastal Hardware Store offers radius corner hinges for replacement doors, interior rooms, entry applications, renovations, and new construction. Compare 1/4-inch and 5/8-inch radius hinges from Emtek, Deltana, and Baldwin Estate by size, duty level, bearing type, material, finish, and installation requirements.

If you need help identifying an existing hinge radius, matching the screw pattern, choosing between residential and heavy-duty hardware, or comparing plain-bearing and ball-bearing hinges, our team can help you review the available options before ordering. Contact us at support@coastalhardwarestore.com or call us at 561-808-2588.