Fine + Coarse
Original tooth structureChoose Fine for a finer surface finish or Coarse for faster shaping. Both use randomly positioned teeth for controlled carving.
1/4″ Shaft Sphere Burr
1/4″ shaft
Die grinders + flex shafts
Technique inspirationA round profile. Flowing texture.Tool size + grade shown may differ.
1/4″ Shaft Sphere Burr
Rated 5.0 out of 5 stars
63
Shape at a glance
Carve hollows, rounded recesses + surface texture.
Sale price
£20.00
Shipping calculated at checkout
1/4″ shaft · Check your fit
Match a 1/4″ collet or compatible chuck. Check your tool’s mounting + speed limits. Hand drills + drill presses are not recommended.
Free U.S. shippingOn orders over $50
Made in the USAPurpose + control
Put it to work
Round profile
Hollow out rounded recesses.
Surface texture
Carve dimples and organic surface patterns.
Controlled passes
Ease pressure as you approach the finished shape.
Match the grade to the job
How the teeth work
Very Coarse
Extreme tooth structureOpen-spaced conical teeth for fast removal with less loading in soft, wet or gummy woods.
Details + dimensions
Rounded recesses + hollow forms
The Kutzall 1/4″ Shaft Sphere Burr uses a rounded profile for power carving concave surfaces and hollow forms. For woodcarving, it is well suited to shaping the inside curves of spoons and bowls, creating rounded recesses or working beneath an overhanging edge. The sphere shape lets you approach a hollow from different angles while retaining a curved contact surface.
The 1/4″ shaft fits a matching collet or compatible adjustable chuck on a die grinder or flex-shaft handpiece. Match the head size to the space you want to carve, and check your power tool’s mounting and speed limits before use.
- Head sizeDiameter × length
- 1″ × 1″
- Shaft diameter
- 1/4″
Overall length: 2.106″Weight: .1875 lbs.
Head sizes exclude teeth. Allow extra clearance in tight spaces.
Works with
- Wood
- Plastic
- Drywall
- Rubber
- Fiberglass
- Soft stone
Not for use on
Metals, ceramics or hard stone.
Mounting Guide
- Match your shaft size
Use a 1/4″ collet or compatible adjustable chuck on a suitable rotary tool, die grinder or flex-shaft handpiece. Hand drills and drill presses are not recommended.
- Seat the shaft securely
Insert at least half of the shaft into the collet or chuck. Secure it according to your power tool’s instructions.
- Use the recommended speed
Recommended operating range: 15,000–30,000 RPM. Both material-removal rate and control improve as speed increases toward the burr’s recommended operating range. Never exceed the lowest maximum speed rating in your setup. Use light pressure and let the tool do the work.
- Let it stop completely
Let your power tool stop completely before setting it down.
Caring for your Kutzall
Brush away buildup
A few passes with a soft wire brush help clear material from between the teeth.
Clear stubborn residue
A torch can remove stubborn buildup from the metal working surface. The tungsten-carbide teeth tolerate the heat.
Protect the teeth
Kutzall’s tungsten-carbide teeth are securely brazed to the steel tool with a nickel alloy. Protect the teeth from impact against hard surfaces, especially while spinning. Let your power tool stop completely before setting it down.
Not for use on metals, ceramics or hard stone.
More on tool careLet the tool cool before handling. Keep heat away from handles and other non-metal components.
Customer reviews
From the Kutzall community.
Real experiences. Shared by makers like you.
Tap a photo or video to explore the project + read the review.
100%would recommend this product
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63 reviews
- JMJohn M.Verified BuyerReviewing1/4" Shaft - Sphere Burrs - 1" x 1" Very Coarse / 1" x 1"I recommend this productRated 5 out of 5 stars3 weeks agoExcellent!
Kutzall has been a game changer in sculpting my wood sculpture.
- ADAllen D.Verified BuyerReviewing1/4" Shaft - Sphere Burrs - 1" x 1" Fine / 1" x 1"I recommend this productRated 5 out of 5 stars2 months agoCoffee scoop
Works great for finishing the inside of coffee scoop
- PSPatrick S.Verified BuyerReviewing1/4" Shaft - Sphere Burrs - 1" x 1" Very Coarse / 1" x 1"I recommend this productRated 5 out of 5 stars3 months agoMy go to number one burr I use more than any other
At the right rpm setting on my cordless die grinder this burr takes care of it all hardwood or softwood
- GMGail M.Verified BuyerReviewing1/4" Shaft - Sphere Burrs - 1" x 1" Fine / 1" x 1"I recommend this productRated 5 out of 5 stars6 months agoWow
Wow. Love it
- SNSteven N.Verified BuyerReviewing1/4" Shaft - Sphere Burrs - 1" x 1" Fine / 1" x 1"I recommend this productRated 5 out of 5 stars7 months agoExcellent tool!
Great for material removal and easy to control.
