Mini Router Bit 7.9mm Keyhole 3.2mm Shank
Shape: Keyhole
Shank Diameter: Ø3.2mm
Tip Diameter: Ø7.9mm
This Mini Keyhole Router Bit is a specialized precision tool designed for woodworkers, decorators, and hobbyists who need a professional mounting solution for small-scale projects. Featuring a 7.9mm large cutting diameter and a standard 3.2mm (1/8") shank, this bit is perfectly sized for use with high-speed rotary tools and miniature router attachments. It is the ideal choice for creating discrete, "blind" hanging slots on the back of picture frames, small plaques, or decorative wall hangings.
The unique geometry of this bit allows it to perform a two-stage cut in a single pass. It plunges into the material to create a localized entry hole and then, as it moves along the workpiece, it carves out a wider T-slotted internal chamber. This results in a keyhole-shaped recess that securely captures the head of a screw or nail, allowing your project to hang flush against the wall without visible hardware.
Because of its T-slot design, this bit is also incredibly useful for technical hobby applications beyond hanging. It can be used to create sliding tracks for adjustable jigs or to mill interlocking "T" channels in architectural models and wooden puzzles. The high-quality cutting edges are engineered to clear chips efficiently from the enclosed horizontal slot, which helps prevent heat buildup and ensures a smooth, snag-free finish in both hardwoods and softwoods.
Built for stability and precision, the bit's balanced construction minimizes vibration even at the high RPMs required by rotary tools. Whether you are adding a functional mounting point to a custom jewelry box or milling an internal track for a mechanical model, this mini keyhole bit provides the specialized "hidden" joinery capabilities required for high-definition craftsmanship and professional-grade finishing.
Application:
- Max RPM: 35 000 RPM
- Hardwood: 25 000 - 25 000 RPM
- Softwood: 30 000 - 35 000 RPM
- Engraving
- Sign-making
- Modelling
- Crafting
- Fine woodworking
- Contractor
- Fabrication
- DIY
The shank of the rotary cutter is securely locked in place by fitting it in the corresponding collet or making use of a keyless chuck.
Rotation speed:
Most rotary tools have the benefit to adjust the rotation speed. Many tool bits that fit in rotary tools have a maximum speed setting. This can normally be found on the packaging.
All materials react differently to speed and will need the tool bit to rotate slower. It is recommended to start using accessories on the slower speed first, before increasing the speed as needed.
The diameter of the tool bit fitted also determines the rotation speed. The larger the diameter, the slower the speed. If the speed is set too high, it could bend the shank/shaft resulting in injury.
