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Core Box Bits

Würth Machinery supplies professional-grade core box router bits from trusted names like Amana Tool, Bosch, and Makita USA. What is a core box router bit used for? Also known as round nose router bits, these tools cut smooth, rounded-bottom grooves used for decorative fluting, juice grooves, and sign-making. Available in multiple diameters and router bit sets, core box bits are versatile additions to any shop’s tooling collection, delivering precision across a range of materials, including wood, MDF, plastics, and solid surface materials.

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1/2" x 1-1/2" x 1/4" Radius Core Box Router Bit, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: AN45910
List Price:
As low as $36.88 /Each
1/2" x 2-7/8" x 1/4" Radius Core Box Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45932
List Price:
As low as $49.79 /Each
5/8" x 2-3/4" x 5/16" Radius Core Box Extra Deep Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45936
List Price:
As low as $69.88 /Each
2" x 2-3/4" x 1" Radius Core Box CNC Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45948-CNC
List Price:
As low as $139.76 /Each
3/8" x 2-3/4" x 3/16" Radius Core Box Extra Deep Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45930
List Price:
As low as $39.36 /Each
3/4" x 2-3/4" x 3/8" Radius Core Box Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45938
List Price:
As low as $79.62 /Each
3/8" x 2" x 3/16" Radius Core Box Router Bit, 2-Flute, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: AN45901
List Price:
As low as $37.00 /Each
5/8" x 2" x 5/16" Radius Core Box Router Bit, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: AN45909
List Price:
As low as $40.30 /Each
1/4" x 1-5/8" x 1/8" Radius Core Box Router Bit, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: AN45904
List Price:
As low as $31.68 /Each
1/4" x 2-1/4" x 1/8" Radius Core Box Router Bit, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: AN45911
List Price:
As low as $30.32 /Each
2-7/8" x 1/2" Radius CNC Ball End Insert Core Box Router Bit, 2-Flute, 1/2" Shank Add to My Favorites
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Amana
Part Number: ANRC-1126
List Price:
As low as $94.35 /Each
3/4" Dia x 3/8" Carbide Tipped Special Cove 1/8" Radius Core Box Bit, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: AN56154
List Price:
As low as $102.30 /Each
1-3/8" Dia x 9/16" Carbide Tipped Classical Plunge Core Box Bit with Upper BB 1/4" Radius, 1/2" Shank Add to My Favorites
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3/8" Dia x 1-1/8" CNC Solid Carbide Compression Spiral Bit, 1 Flute, 3/8" Shank Add to My Favorites
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Amana
Part Number: AN46038
List Price:
As low as $107.83 /Each
7/16" x 4-1/2" Rotary Hammer Centering/Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66709
List Price:
As low as $20.82 /Each
6" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66690
List Price:
As low as $493.24 /Each
5" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66684
List Price:
As low as $393.81 /Each
4" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66678
List Price:
As low as $359.34 /Each
3-1/8" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66662
List Price:
As low as $291.58 /Each
2-5/8" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66656
List Price:
As low as $246.40 /Each
2" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66640
List Price:
As low as $197.12 /Each
1-3/4" x 4" Rotary Hammer Core Bit Add to My Favorites
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Makita USA
Part Number: MKB-66634
List Price:
As low as $165.59 /Each
16-1/2" SDS-MAX Rotary Hammer Core Bit Adapter Add to My Favorites
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Makita USA
Part Number: MKB-66628
List Price:
As low as $141.69 /Each
9" SDS-MAX Rotary Hammer Core Bit Adapter Add to My Favorites
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Makita USA
Part Number: MKB-66612
List Price:
As low as $117.48 /Each
16-1/2" Spline Rotary Hammer Core Bit Adapter Add to My Favorites
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Makita USA
Part Number: MKB-66606
List Price:
As low as $156.06 /Each
9" Spline Rotary Hammer Core Bit Adapter Add to My Favorites
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Makita USA
Part Number: MKB-66597
List Price:
As low as $130.83 /Each
1" x 1-3/4" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733270-A
List Price:
As low as $59.10 /Each
3/4" x 1-1/2" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733009-0A
List Price:
As low as $44.58 /Each
5/8" x 1-1/2" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733008-8A
List Price:
As low as $39.16 /Each
1/2" x 1-1/2" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733008-6A
List Price:
As low as $37.84 /Each
3/8" x 1-1/2" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733008-4A
List Price:
As low as $33.88 /Each
1/4" x 1-5/8" Core Box Router Bit, 2 Flute, 1/4" Shank Add to My Favorites
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Makita USA
Part Number: MK733008-2A
List Price:
As low as $33.88 /Each
1/2" x 2-1/8" Insert Core Box Router Bit, 1-Flute, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: ANRC-45910
List Price:
As low as $52.39 /Each
1/4" x 1-1/2" Miniature Core Box Router Bit, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: ANMRB0604
List Price:
As low as $16.59 /Each
4-Piece Ball End Router Bit Set, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: ANAMS-557
List Price:
As low as $163.06 /Each
2-Piece 2D Carving CNC Core Box Router Bit Pack, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: ANAMS-191
List Price:
As low as $107.70 /Each
18-Piece CNC Advanced General Purpose Router Bit Collection, 1/2" Shank Add to My Favorites
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Amana Tool
Part Number: ANAMS-139
List Price:
As low as $1,525.59 /Each
18-Piece CNC Signmaking Advanced Router Bit Collection, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: ANAMS-132
List Price:
As low as $751.86 /Each
8-Piece Core Box Router Bit Collection, 1/4" Shank Add to My Favorites
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Amana Tool
Part Number: ANAMS-420
List Price:
As low as $260.91 /Each

Core box bits are sometimes confused with bullnose bits, but the difference lies in the cut: bullnose router bits have round edges, while a round nose bit/core box router bit uses a plunge to carve concave grooves. Distinct options like ball-end router bits and sets expand design possibilities, making them a superior choice for cabinetry, furniture accents, and decorative channels. For complementary shaping, consider picking up some beading bits, cove and bead bits, or corner rounding bits for your drill. 

Woodworkers Choose Würth Machinery for Core Box & Router Bits

Backed by decades of metalworking and woodworking expertise, our lineup goes far beyond core box router bit sets and core bit adapters to include dependable additional woodworking and shop supply solutions that keep your shop productive and profitable. Customers value us for more than performance alone: our 24/7 online ordering, factory-trained, hands-on technical support, make it easier to tackle projects of any size. With fast delivery and a reputation for reliability, Würth Machinery remains the go-to source for experts nd dabblers who expect consistency in every purchase and cut.