3/8 x 4 Counterbore For Face Frame Machines

3/8 x 4 counterbore describes a carbide tipped counterbore with a 3/8 inch diameter cutting head and 4 inch overall length, so installers can match the bit to common face frame boring layouts on cabinet lines and shop machines. This Amana Tool carbide tipped counterbore/drill bit is built for face frame machines, so it handles repetitive cabinet joinery in a production environment. The precision ground carbide-tipped counterbore cuts splinter free, which protects face frame edges, keeps joints clean, and reduces sanding around the bore. A non-slip surface treatment provides positive clamping in the machine collet, so the bit stays secure during cycles. The wide web design adds superior strength to the body, supporting the cutting edges under load. A replaceable HSS fishtail drill at the center creates the pilot, so drill wear can be addressed by swapping the drill while retaining the main counterbore body in service.

Key Details That Support Face Frame Work

• The precision ground carbide-tipped counterbore delivers splinter free cutting, which helps keep the face frame surface clean and ready for assembly or finishing after boring.
• The non-slip surface treatment provides positive clamping, so the shank seats firmly in the machine and resists rotation during repeated drilling cycles.
• The wide web design creates superior strength in the body, supporting the cutter during deep counterboring in hardwoods or engineered materials without flex.
• The replaceable HSS fishtail drill handles the pilot hole, allowing the pilot cutting edge to be renewed while the carbide counterbore body remains in service.
• The 3/8 inch counterbore diameter and 4 inch overall length align with face frame machine setups that are designed around this size range.

Face Frame Counterbore Fit And Mounting Details

This counterbore/drill bit is specified with a 9 mm shank, so it fits machine spindles or collets built for that shank size on face frame equipment. The bit is identified as Type 1 for face frame machines, which ties it to face frame boring stations that use this style and geometry. A D diameter of 3/8 inch sets the counterbore size, so installers can plan for fastener heads or plugs that seat within that diameter. An overall length of 4 inches gives reach across typical face frame thicknesses and fixture plates without excessive projection. The D1 dimension of 0.136 inch defines a specific part of the cutting or pilot geometry, supporting consistent pilot hole sizing across multiple frames.

Using This Counterbore In Cabinet Production

Where This Counterbore Fits Face Frame Machines

This carbide tipped counterbore/drill bit is designated as available for face frame machines, Type 1, so it is suited to face frame drilling stations that require this configuration. The bit fits Evans, Ritter, Unique, Marcon and Norfield face frame machines, so shops running those brands can match the bit directly to their existing equipment. The 9 mm shank interfaces with machine holders designed around that metric shank, helping maintain concentric rotation during boring. With a 3/8 inch cutting diameter, the counterbore establishes a consistent seat for fastener heads or plugs used in face frame assembly layouts. The 4 inch overall length works with typical machine stroke and fixture heights on these face frame machines, supporting through-boring and counterboring operations in standard cabinet stock.

Details That Support Repeatable Boring Results

The precision ground carbide-tipped counterbore is engineered for splinter free cutting, which promotes repeatable hole quality from frame to frame and supports a smooth workflow through assembly and finishing. Its wide web design provides superior strength to the body, helping the bit track straight through hardwood rails and stiles under production feed rates. The non-slip surface treatment creates positive clamping between the 9 mm shank and the machine collet, so the bit holds its position and reduces the chance of slippage that could alter depth or alignment. A replaceable HSS fishtail drill at the center creates the pilot hole inside the 3/8 inch counterbore, so the pilot geometry can be restored when worn by changing the drill rather than replacing the entire carbide tool body.

Common Questions About This Counterbore Bit

Select This Bit For Face Frame Boring Accuracy

This 3/8 x 4 counterbore from Amana Tool combines a precision ground carbide-tipped cutting head, a 9 mm shank, and a wide web design, giving face frame machines a strong, splinter-free boring tool. Its fit to Evans, Ritter, Unique, Marcon and Norfield face frame machines supports straightforward integration into existing cabinet production setups. The Type 1 configuration and 0.136 inch D1 geometry support consistent pilot and counterbore relationships, helping maintain accurate joinery from part to part.