A drill guide that includes associated components and various methods of use herein. The drill guide includes a first guide column and a second guide column provided on a base plate. The drill guide also includes a chuck carrier adapted to operatively receive a drill chuck of a portable drill. The chuck carrier is operably engaged with the first guide column and the second guide column, and the chuck carrier is linearly moveable along the first guide column and the second guide column between a return position and a plunging position relative to the base plate. The drill guide also includes a tapered portion defined in the first guide column. The drill guide also includes a depth stopper that is operably engaged with the first guide column, wherein the tapered portion enables self-tightening of the depth stopper about the first guide column.

A drill guide that includes associated components and various methods of use herein. The drill guide includes a first guide column and a second guide column provided on a base plate. The drill guide also includes a chuck carrier adapted to operatively receive a drill chuck of a portable drill. The chuck carrier is operably engaged with the first guide column and the second guide column, and the chuck carrier is linearly moveable along the first guide column and the second guide column between a return position and a plunging position relative to the base plate. The drill guide also includes a tapered portion defined in the first guide column. The drill guide also includes a depth stopper that is operably engaged with the first guide column, wherein the tapered portion enables self-tightening of the depth stopper about the first guide column.

A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

A processing device includes a mounting base, a cutter holder, and a brake. The brake includes a driving member, a resisting member, and an elastic member. The driving member includes a main body and a driving shaft movably placed in the main body. The driving shaft is driven to move in a straight line by the main body. One end of the driving shaft is movably coupled to the cutter holder, and another end of the driving shaft is coupled to the resisting member. The elastic member is positioned between the main body and the resisting member. The driving shaft is configured to move toward one side of the driving member adjacent to the elastic member under an elastic restoring force of the elastic member, whereby the cutter holder moves with the driving shaft toward one end of the driving member adjacent to the elastic member.

A drilling apparatus used in the process of marinating a vegetable such as corn on the cob is provided. A rigid sleeve is slidably attached to the shank of a drill bit. The sleeve is resiliently biased toward a cutting head at one end of the shank. An end of an ear of corn is inserted into the sleeve and a hole is drilled in the corn cob as the shank slides through an opening in the sleeve into the corn cob. The sleeve keeps the drill bit aligned with the corn cob and protects the user's hand. Once the hole is drilled, a marinade is injected into the hole and a small dowel is used to plug the hole. The corn is then allowed to marinate before cooking. The marinade penetrates the corn cob and infuses an improved flavor in the kernels of corn.

A drilling and tapping machine includes a power head assembly supported at a vertical orientation, a parallelogram arm structure including a head support and an arm base, and an arm positioning assembly coupled with the head support and the arm base support for guiding corresponding movements of the head support and the arm base support so as to ensure a vertical trajectory of the power head assembly. The machine further includes a counterweight configuration to vertically move the power head assembly via a lever. The machine further includes an operational control assembly to selectively shift the power head assembly between a drilling operation and tapping operation. Therefore, the machine is suitable to make a hole with a diameter of 0.5 to 3 mm.

A drill press comprises a hollow pillar with a base, a holder for a drill slidably mounted on the pillar and a clamp integral to the pillar for clamping the base to a work piece so that the drill is guided to the work piece. The clamp is a G clamp with a jaw held by an arm which engages a screw thread shaft housed in the pillar so that rotating the shaft raises and lowers the arm and the jaw.