Carbitool
T528B 1/2 Rounding Over Router Bit with Ball Bearing Guide Carbitool
Part No: T528B 1/2 | Barcode: 9314350006225 | Product Group: R613
The Carbitool T528B 1/2 is a 2-flute carbide-tipped rounding over bit with ball bearing guide. Produces a large 7/8" (22.23 mm) radius edge for statement table tops and architectural timber work. 1/2" shank. Can be converted to a beading bit by swapping to a TB9 bearing. 1/2″ shank.
2 Flute
Carbide Tipped
7/8" (22.23mm) Radius
1/2″ Shank
Ball Bearing Guide
Convertible to Beading Bit
Compatible Materials
Hardwood
Softwood
MDF
Plywood
Laminates
Composites
Key Features & Benefits
- Precision tool geometry — delivers extra-smooth, chatter-free cuts for a consistent edge profile every pass.
- Ball bearing guide — rides against the workpiece face so no fence or edge guide is needed; ideal for curved and irregular edges.
- Convertible profile — swap the included TB11 bearing for a TB9 bearing to expose the bottom corner of the cutter and produce a 1/16" edge bead instead of a rounded-over edge.
- 2-flute carbide-tipped construction — long tool life and clean cuts across a wide range of timber species and sheet materials.
- 1/2″ shank — fits routers and router tables suited to this shank size.
When to Use This Bit
Choose the T528B 1/2 when you need a 7/8″ rounding over edge on furniture components, frames, shelving or trim work. The ball bearing guide makes it the right choice for curved workpieces or template-guided routing where a fence isn't practical. Other radii in this R613 series range from 1/16" (T502B) up to 1-1/4" (T540B 1/2) to suit any edge profile requirement.
Pro Tip: To convert the T528B 1/2 into a beading bit, replace the standard TB11 bearing with a smaller TB9 bearing. This exposes the bottom corner of the cutter, producing a small bead detail on the lower edge of the profile — no second bit required.
| Part No. | A (Cutting Dia.) inch | A mm | B (Cut Length) inch | B mm | C (Overall Length) inch | C mm | R Radius inch | R mm | Shank inch | Shank mm | Barcode |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T502B | 5/8 | 15.88 | 5/16 | 7.94 | 1-7/8 | 47.63 | 1/16 | 1.59 | 1/4 | 6.35 | 9314350006096 |
| T502MB | 21/32 | 16.67 | 11/32 | 8.73 | 1-7/8 | 47.63 | — | 2.00 | 1/4 | 6.35 | 9314350014671 |
| T504B | 3/4 | 19.05 | 1/2 | 12.70 | 2 | 50.80 | 1/8 | 3.18 | 1/4 | 6.35 | 9314350006102 |
| T504MB | 13/16 | 20.64 | 7/16 | 11.11 | 2 | 50.80 | — | 4.00 | 1/4 | 6.35 | 9314350010253 |
| T506B | 7/8 | 22.22 | 15/32 | 11.91 | 2 | 50.80 | 3/16 | 4.76 | 1/4 | 6.35 | 9314350006119 |
| T506B 1/2 | 7/8 | 22.22 | 15/32 | 11.91 | 2-1/2 | 63.50 | 3/16 | 4.76 | 1/2 | 12.70 | 9314350010710 |
| T505MB | 7/8 | 22.22 | 15/32 | 11.91 | 2 | 50.80 | — | 5.00 | 1/4 | 6.35 | 9314350010260 |
| T506MB | 31/32 | 24.61 | 33/64 | 13.10 | 2-3/16 | 55.56 | — | 6.00 | 1/4 | 6.35 | 9314350025745 |
| T508B | 1 | 25.40 | 1/2 | 12.70 | 2 | 50.80 | 1/4 | 6.35 | 1/4 | 6.35 | 9314350006126 |
| T508B 1/2 | 1 | 25.40 | 1/2 | 12.70 | 2-1/2 | 63.50 | 1/4 | 6.35 | 1/2 | 12.70 | 9314350006133 |
| T510B | 1-1/8 | 28.58 | 1/2 | 12.70 | 2 | 50.80 | 5/16 | 7.94 | 1/4 | 6.35 | 9314350006140 |
| T510B 1/2 | 1-1/8 | 28.58 | 1/2 | 12.70 | 2-5/8 | 66.68 | 5/16 | 7.94 | 1/2 | 12.70 | 9314350006157 |
| T512B | 1-1/4 | 31.75 | 5/8 | 15.88 | 2-1/4 | 57.15 | 3/8 | 9.53 | 1/4 | 6.35 | 9314350006164 |
| T512B 1/2 | 1-1/4 | 31.75 | 5/8 | 15.88 | 2-5/8 | 66.68 | 3/8 | 9.53 | 1/2 | 12.70 | 9314350006171 |
| T510MB 1/2 | 1-9/32 | 32.54 | — | 16.50 | 2-53/64 | 71.83 | — | 10.00 | 1/2 | 12.70 | 9314350025752 |
| T512MB 1/2 | 1-7/16 | 36.51 | — | 18.00 | 2-57/64 | 73.42 | — | 12.00 | 1/2 | 12.70 | 9314350025769 |
| T516B | 1-1/2 | 38.10 | 3/4 | 19.05 | 2-1/4 | 57.15 | 1/2 | 12.70 | 1/4 | 6.35 | 9314350006188 |
| T516B 1/2 | 1-1/2 | 38.10 | 3/4 | 19.05 | 2-3/4 | 69.85 | 1/2 | 12.70 | 1/2 | 12.70 | 9314350006195 |
| T520B 1/2 | 1-3/4 | 44.45 | 7/8 | 22.23 | 3-1/4 | 82.55 | 5/8 | 15.88 | 1/2 | 12.70 | 9314350006201 |
| T524B 1/2 | 2 | 50.80 | 1 | 25.40 | 3-1/4 | 82.55 | 3/4 | 19.05 | 1/2 | 12.70 | 9314350006218 |
| T528B 1/2 ★ | 2-1/4 | 57.15 | 1-5/64 | 27.38 | 3-1/2 | 88.90 | 7/8 | 22.23 | 1/2 | 12.70 | 9314350006225 |
| T532B 1/2 | 2-1/2 | 63.50 | 1-1/4 | 31.75 | 3-5/8 | 92.08 | 1 | 25.40 | 1/2 | 12.70 | 9314350006232 |
| T540B 1/2 | 3 | 76.20 | 1-15/32 | 37.31 | 3-3/4 | 95.25 | 1-1/4 | 31.80 | 1/2 | 12.70 | 9314350006249 |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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