Carbide Tipped Corner Round 5/16 Radius x 1-1/8 Dia - Durable Router

In this review the focus is on a solid, workmanlike router bit designed for edge rounding tasks. The Carbide Tipped Corner Round with a 5/16' radius and 1-1/8' diameter is for woodworkers who want a clean, repeatable round over without extra fuss; the single biggest reason to buy is its durable carbide tip and shoulder design that produce a smooth fillet and reduce sanding time. This is a straightforward review of how the bit performs in real shop use and who will get the most value from it.

Key Features

• 5/16' Radius: Creates a consistent quarter-round fillet that eases sharp edges and yields a finished look with minimal sanding.
• 1-1/8' Diameter: Provides a substantial profile for visible edge work on tabletops, shelves, and trim without removing excessive material.
• 1/2' Cutting Height: Offers enough cutting depth for most edge treatment needs while keeping control in handheld or table-mounted routers.
• 1/2' Shank: Fits standard router collets for stability and reduced wobble during use, important when working in hardwoods.
• Carbide Tipped Construction: The carbide wears slowly and stays sharp through multiple passes, delivering clean rounding even in dense woods like hard maple.
• Shoulder to Cut a Fillet: The built-in shoulder helps locate the bit for repeatable cuts and makes it possible to form a second shoulder with a smaller pilot bearing for a beading effect.

Who It's For

The bit suits hobbyists and professional woodworkers who need a reliable corner-rounding tool for furniture edges, moldings, and visible trim. It is particularly useful for those working with hardwoods where sharpness and carbide durability cut down on frequent sharpening or replacement.

Less suitable are users who need very large or very small radii, highly decorative multi-profile bits, or those wanting a complete set of profiles; this single-purpose bit excels at clean round overs rather than complex edge shaping.

Pros & Cons

Pros

• High-quality carbide tip that holds an edge and maintains sharpness after repeated use.
• Durable construction and a 1/2' shank that gives stable, vibration-free operation in most routers.
• Leaves a smooth finish that reduces sanding time and produces attractive rounded edges.

Cons

• Size may not suit every job; the 5/16' radius and 1-1/8' diameter are fixed and limit versatility for users needing multiple radii.

Specifications

Brand	Amana Tool
Diameter (D)	1-1/8' (1.125')
Radius (R)	5/16'
Cutting Height (B)	1/2'
Shank	1/2'
Overall Length (L)	2-7/16'
Flutes	2

Our Verdict

The Carbide Tipped Corner Round 5/16' x 1-1/8' is a dependable, value-minded router bit for anyone who needs clean, repeatable round-overs. Its carbide tip and solid shank make it a practical choice for both hobby and professional shops, delivering a smooth edge and saving time on sanding, though users requiring multiple radii will still need additional bits.

Frequently Asked Questions

Can this bit be used in hardwoods?
Yes. The carbide tip and stable 1/2' shank are well suited to hardwoods and maintain sharpness through extended use.

Does it include a replacement bearing?
The product lists replacement bearing 47706 as compatible, but the bearing is a separate part rather than included with the bit.

Can it create decorative beading?
With a smaller pilot bearing a second shoulder can be produced, effectively allowing the bit to form a beading profile.