Product Description
CMT Window Sill and Finger Bit with Bearing - 1 1/2 in. Diameter, 1/2 in. Shank is a specialized hardwood-cutting router bit engineered by CMT for shaping the edges of window sills and creating elegant finger pulls on doors and drawers. With a 1/2 in. radius profile, 1 3/8 in. cutting height, and a top-mounted bearing that guides the bit along curved templates, this 2-flute carbide bit delivers consistent, repeatable edge profiles whether you are working with decorative millwork or functional joinery. Designed for router table use, it brings professional-grade edge shaping to cabinetry, furniture, and architectural woodworking applications.
Key Features
- Window Sill and Finger Pull Profile - the specialized 1/2 in. radius geometry was originally developed for shaping window sill edges, and works equally well for crafting finger pulls on door and drawer fronts, giving you a versatile single bit for multiple millwork applications.
- Top-Mounted Bearing Guide - the bearing rides along curved or straight templates to keep the profile consistent on irregular workpiece edges, enabling template-guided curved work without drifting or freehand error.
- HW (Hardwood-Grade) Carbide Cutting Material - industrial-grade carbide construction handles solid hardwood and other dense materials cleanly, maintaining a sharp edge through extended production runs.
- 2-Flute Design - dual cutting edges balance feed rate and finish quality, producing smooth, tear-out-free edge profiles on each pass.
- 1/2 in. Shank Diameter - a full 1/2 in. shank provides maximum stability in the router collet, reducing vibration and chatter that can mar fine edge profiles.
- Right-Hand Rotation - standard RH rotation is compatible with the vast majority of router tables, making setup straightforward and consistent.
- Router Table Recommended Use - optimized for router table operation, giving you fence control or template-guided curved work with superior workpiece support and operator control compared to handheld routing.
Why This Product
- Two profiles in one bit - the same window sill edge geometry that shapes architectural sill nosings also produces clean finger pulls on cabinet doors and drawer fronts, reducing the number of specialty bits you need in your shop.
- Template-ready bearing for curved work - the top-mounted bearing means you are not limited to straight fence cuts. Curved window sills and arched drawer faces can be profiled accurately using a template, expanding the design possibilities of a single tool.
- Full 1/2 in. shank for large-diameter cuts - at 1 1/2 in. cutting diameter, a 1/2 in. shank is the right match for minimizing deflection and keeping the profile geometry true across the entire 1 3/8 in. cutting height.
- Hardwood-grade carbide for lasting performance - HW carbide material is selected for its durability in dense wood species and demanding production environments, meaning fewer bit changes and more consistent results over time.
Specifications
- Manufacturer Part Number: 855.805.11B
- Brand: CMT Orange Tools
- Diameter: 1 1/2 in.
- Cutting Height: 1 3/8 in.
- Total Length: 3 3/8 in.
- Radius: 1/2 in.
- Shank: 1/2 in.
- Number of Teeth (Flutes): 2
- Rotation: Right-Hand (RH)
- Cutting Material: HW
- Bearing: Included (top-mounted)
Approved Applications
- Window sill edge shaping and nosing profiles
- Finger pull creation on cabinet door edges
- Finger pull routing on drawer fronts
- Curved template work using the top-mounted bearing
- Straight edge profiling against a router table fence
- Decorative architectural millwork and trim edge work
Frequently Asked Questions
Can this bit be used with a handheld router, or is a router table required?
CMT recommends using this bit on a router table only. The large 1 1/2 in. cutting diameter and 1 3/8 in. cutting height make router table operation significantly safer and more controllable, providing proper workpiece support and feed direction management that a handheld router cannot reliably offer for this profile size.
Can this bit follow curved workpiece edges, or is it limited to straight cuts?
The top-mounted bearing allows the bit to follow curved templates, making it suitable for curved window sills and other non-linear edges. For straight cuts, the bearing can also ride against a router table fence setup. This dual capability makes it useful across a wider range of profiling tasks.
What is the difference between the 1/2 in. radius spec and the 3/8 in. radius referenced in the product name?
The product designation references a radius range of 1/2 in. to 3/8 in. as part of the window sill and finger bit profile family. The confirmed radius specification for this specific bit (855.805.11B) from the product data is 1/2 in., reflecting the curvature of the profile it cuts.
What shank size router collet does this bit require?
This bit has a 1/2 in. shank and requires a router table with a 1/2 in. collet. A 1/2 in. shank is strongly preferred for a bit of this cutting diameter because it reduces deflection, minimizes vibration, and keeps the edge profile consistent across the full 1 3/8 in. cutting height.
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