85 results about "Hole saw" patented technology

Quick-change hole saw mandrel (10) for a hole saw (18); includes drive shank (14) extending along a central axis (C); and mounting end (16) detachable connected to mounting aperture (26) of hole saw (18) and including drive pin (30) for engagement with drive pin aperture (28) of the hole saw (18). The mandrel (10) includes a gripping arrangement (32) insertable through the mounting aperture (26) for gripping the hole saw base (20). In a normally expanded configuration the gripping arrangement (32) grips the base (20). The gripping arrangement is selectively movable to a contracted configuration in which it can be inserted into or removed from the mounting aperture (26). A pilot bit lock selector (44) for selecting between an unlocked mode permitting quick removal and quick insertion of the pilot bit (12) and a locked mode in which the pilot bit (12) is locked against removal.

A hole saw includes a cylindrical body having a sidewall with a first end and a second end opposite the first end. The cylindrical body includes a gullet formed in the sidewall between a leading surface, a trailing surface, and a bottom surface of the sidewall. The gullet defines a central longitudinal axis extending between the first and second ends of the sidewall that is obliquely oriented relative to a rotational axis of the hole saw such that the gullet is angled from the first end to the bottom surface in a direction toward a cutting direction of the hole saw. The gullet has a dimension measured parallel to the rotational axis between the first end of the sidewall and the bottom surface of the gullet that is greater than 1.5 inches. The hole saw includes a cutting tooth coupled to the first end of the sidewall adjacent the gullet.

An arbor for a hole saw has a shank having an internal chamber therein, a spring situated within the internal chamber, and a plunger configured to compress the spring, when under pressure, within the internal chamber, the plunger having a drill bit receiving slot. As a user applies force to the pilot drill bit extending from the plunger, the applied pressure forces the plunger into the internal chamber, compressing the spring. Once the pressure on the pilot drill bit is released, such as when the core is freed from surrounding material, the spring extends, forcing the plunger from the internal chamber and thereby forcing the core from the surrounding material and / or hole saw. In some examples, a release mechanism may be included to control the release of the plunger from the internal chamber.

A hole saw is provided that includes a mandrel, a body, and a plurality of blade assemblies slidably mounted on the body. The hole saw has an adjustable size such that a user can vary the pitch of the blade assemblies to adjust the size (e.g., diameter) of the hole cut by the hole saw. In some embodiment, the body includes a plurality of pairs of wings, and each blade assembly is slidably mounted on a pair of wings of the plurality of pairs of wings. When a first blade assembly of the plurality of blade assemblies moves along its respective pair of wings, a first wing of each of the plurality of pairs of wings rotates and the other blade assemblies move along its respective pair of wings.

The utility model discloses a woodworking tapper capable of removing chips smoothly, which relates to the technical field of chip removal of tappers, and comprises a cylindrical cover body and a connecting shaft, a drill bit is arranged below the connecting shaft, a piston plate and a micro hollow baffle are sequentially arranged on the inner side of the cylindrical cover body from top to bottom, and the micro hollow baffle is parallel to the piston plate. Guide rods are annularly and evenly arranged above the piston plate, a sliding sleeve is fixedly installed in the middle of the piston plate, a closed spiral groove is formed in the inner side face of the sliding sleeve, a sliding block is arranged on the drill bit and slidably connected into the spiral groove, a reset spring is connected to the outer side of the drill bit in a sleeving mode, and the reset spring and the micro-hollowed-out baffle are fixedly installed. Ventilation holes are annularly formed in the outer side of the cylindrical cover body. According to the scheme, chip removal of the woodworking tapper can be facilitated, the drilling position of the woodworking tapper can be automatically cooled in the drilling machining process of the woodworking tapper through starting of the electric drill, and the use effect of the woodworking tapper is further guaranteed.

An arbor for a hole saw. The arbor includes an arbor stem having at least one arm with a threaded portion configured to engage the hole saw. The arbor further includes an actuator rotatable to move the at least one arm and a body mounted to the actuator. The body has a channel that receives the at least one arm. Moreover, the arbor includes at least one magnet positioned within the at least one arm.

The present invention provides a lifting device for horizontal members that allows for lifting and unlifting of horizontal members by attaching and detaching the lifting hooks to the horizontal member, which has a main surface without lifting fittings arranged horizontally. [Solution] The horizontal member lifting device 10 of the present invention comprises a lifting body 12 that can be lifted and transported by a crane, A hole saw 26 is attached to the lifting body 12 and extends toward a horizontally positioned horizontal member, on which one main surface of the lifting body sits, to drill a hole in the one main surface. The invention is characterized by having a locking mechanism 30 positioned around the rotation axis of the hole saw 26, in which, after drilling with the hole saw 26, the locking body 32, which is reduced in diameter toward the axis of the insertion hole as the hole saw 26 extends, is inserted from one main surface, and after penetration, the locking body 32 expands in diameter and locks onto the other main surface.

An arbor for a hole saw an arbor stem, an actuator, and at least one post. The arbor stem includes at least one arm having a threaded portion configured to engage the hole saw. The actuator is rotatable about a central axis of the arbor to move the at least one arm. The actuator includes a surface facing the at least one arm and a track. The track is recessed from the surface of the actuator. The at least one post extends from the at least one arm to engage the track. The arm is movable in a radial direction in response to rotation of the actuator to vary a circumference of the arbor stem.

This utility model relates to the field of hole saw technology, and more particularly to a hole saw with self-cleaning function. It includes a hole saw body, a guide rod, a push plate, a return spring, and a sliding mechanism. At least three guide holes are evenly distributed on the upper surface of the hole saw body. A guide rod is slidably disposed within each guide hole, with its direction parallel to the axial direction of the hole saw body. The bottom end of the guide rod is connected to a push plate, which is located within the hole saw body. A return spring is wound around the outside of the guide rod. The push plate can move under the action of the return spring to push out and clean debris from within the hole saw body. After the hole is drilled, the workpiece debris detaches from the workpiece. At this time, the push plate, under the action of the return spring, drives the contact plate and sliding plate to move, pushing the workpiece debris out of the hole saw body. This achieves a self-cleaning function, making the hole drilling operation simpler and faster.

The utility model belongs to the technical field of wall tapping tools, in particular to a wall tapper convenient for replacing a drill bit, which comprises a central drill bit and a circular hole saw, and further comprises a regular hexagonal fixing sleeve and a locking assembly, and the locking assembly comprises a locking pressing block, a fixing frame and a threaded column; a regular hexagonal fixing sleeve is fixed to the center drill bit, a regular hexagonal through hole allowing the regular hexagonal fixing sleeve to penetrate through is formed in the circular hole saw, a plurality of fixing frames are fixed to the circular hole saw at equal intervals in the circumferential direction, and threaded columns are installed on the fixing frames in a threaded screwing mode. According to the wall tapper, the regular hexagonal fixing sleeve penetrates through the regular hexagonal through hole to position the installation position of the center drill bit, the threaded column is rotated, the threaded column pushes the locking pressing block to be embedded into the locking groove to be locked under the screwing effect of threads, and the installation stability of the center drill bit is greatly improved; and meanwhile, the center drill bit is easy to disassemble and replace, and the use convenience is improved.

The utility model discloses a multi-tooth bimetal hole saw with a long and short heat dissipation groove structure, which comprises a lengthened plate, a quick release mechanism is arranged on the surface of the lengthened plate and is used for dismounting and assembling the hole saw, and the quick release mechanism comprises a clamping component which is arranged at the bottom of the lengthened plate and is used for fixed connection. According to the multi-tooth bimetal hole saw with the long and short heat dissipation groove structure, two clamping plates are arranged on the surface of a lengthened plate, a clamping block is rotationally connected to the surface of a clamping shaft, two clamping grooves are formed in the top of the lengthened plate, and two grooves are formed in the top of the lengthened plate at equal intervals, so that the problems that when the hole saw is used, the length of a saw blade is limited, and the service life of the saw blade is limited are solved. The problems that when cutting and drilling tasks are carried out, preset depth cannot be reached, reverse side repositioning needs to be carried out, then drilling is carried out again, positioning can occupy a large amount of time, repositioning can cause a large gap in the drilling position, a workpiece is damaged, and the production cost is increased are solved.

A hole saw movable about a rotational axis in a cutting direction to cut into a workpiece. includes a cylindrical body having a sidewall with a first end and a second end opposite the first end, and a gullet extending through the first end of the cylindrical body. The gullet includes a first linear surface extending parallel to the rotational axis, a second linear surface extending parallel to the rotational axis, and a third linear surface extending from the first linear surface toward the second linear surface, the third linear surface oriented oblique to the rotational axis. The cylindrical body also includes a cutting tooth coupled to the first end of the sidewall adjacent the gullet, and an end cap coupled to the second end of the sidewall.

To provide an electric tool system that can reduce kick-back.SOLUTION: An electric tool system 100 comprises an electric tool body 1, and a transmission mechanism 2. The electric tool body 1 has an output shaft 12 which is rotated power of a motor. The transmission mechanism 2 transmits rotation of the output shaft 12 to a hole saw A1. The transmission mechanism 2 has a planetary gear 213, and a drill part 4. The planetary gear 213 rotates in linkage with rotation of the output shaft 12 in the state that a position thereof relative to the output shaft 12 is fixed. The drill part 4 rotates integrally with the planetary gear 213. The drill part 4 contacts a work object X1 before the hole saw A1 contacts the work object X1.SELECTED DRAWING: Figure 1

A closet flange plug for sealing an opening of a closet flange and for being cut away by operation of a hole saw. The closet flange plug has an annular body portion for sealing the closet flange opening and a drill guide post concentrically disposed within the body portion. The drill guide post has a solid base portion of a material, such as polyvinyl chloride (PVC) thermoplastic, operative to bind in the hole saw drill bit. The annular body portion is adapted to be cut through by the hole saw. The drill guide post has an upper portion projecting above the annular body portion while the base portion projects below the annular body portion. A borehole concentrically disposed within the upper portion of the guide post has a portion sized to interfere with and be drilled into by the hole saw drill bit.

This product is a buried pipe window-opening tool with a peeling section, used in conjunction with a hole saw to create a window on the side of a buried pipe that houses electrical wires or the like to check the condition inside. As shown in the "Reference Perspective View Showing Usage," the cylindrical part of this product is fitted into an annular cutting groove that has been pre-cut to a half-depth of the pipe thickness using a hole saw. Then, by swinging the gripping side of this product, in which the cylindrical part is fitted, along the longitudinal direction of the buried pipe, a crack can be created in the thin remaining portion of the groove bottom around the core formed inside the cutting groove. The peeling section at the rear end of this product can be inserted into the crack around the core, and the core can be separated from the buried pipe by levering or other means.

The utility model relates to the field of tappers, in particular to a tapper connecting rod. A tapper connecting rod comprises a base, an outer cutting knife connected to the base, a drilling assembly installed on the inner side of the base and a knife lock assembly located on the outer side of the base and used for locking the outer cutting knife, and a threaded hole used for being in threaded fit with the base and a positioning hole located in the side face of the threaded hole are formed in the outer cutting knife. The cutter lock assembly comprises a positioning piece arranged on the base in a sleeving mode and a cutter lock housing rotationally connected with the base, the positioning piece comprises a positioning column penetrating through the base to be inserted into the positioning hole, and the cutter lock housing is in threaded fit with the positioning piece. When the outer cutter needs to be replaced, the cutter lock housing is rotated, and the positioning piece in threaded fit with the cutter lock housing cannot rotate freely due to limitation of the positioning column and the positioning hole, so that the positioning piece moves downwards. And when the positioning column is separated from the positioning hole, the outer cutting knife can be screwed off and replaced by a new outer cutting knife.

This invention is an improvement to the hole-cutting saw that is currently widely available in the market. A tiny cutting blade attached to the bottom inner wall of the hole saw to help shave out diameter of the cutout plug, and cone shaped pilot drill bit to reduce the friction between cutout plug and pilot drill bit. End result is the quick, easy separation of cutout plug from hole saw.

A device is for an axial displacement of a hole saw for a hand-held drill, wherein the hole saw is coupled to the drill by a drive shaft, and the hole saw and an actuator are rotatably connected and positioned in a housing with a coupling for the drill. The actuator has an outer threaded portion which corresponds to an inner threaded portion in the housing so that the actuator and the hole saw are displaced axially along the drive shaft when the actuator rotates relative to the housing. The actuator is connected to the drive shaft via a slip clutch arranged to transfer and reduce a reduced torque from the drive shaft to the actuator.

In a hole saw (100) which has a cylindrical base body (110) and a fastening section (140) for fastening to a tool holder of a hand-held power tool, wherein at least one drilling cutting edge (120) is arranged in the region of an open end (105) of the cylindrical base body (110) axially opposite the fastening section (140), the cylindrical base body (110) has a lateral surface (106) in the circumferential direction (101), on which at least one further cutting edge (130) is provided, wherein the at least one further cutting edge (130) enlarges a diameter (109) of the cylindrical base body (110).

To provide a hole saw having a simple structure and capable of preventing a cutting piece from being pinched. [Solution] The blade portion 6 of the hole saw 1 is composed of a long blade 7 and a short blade 8, each of which has a different length from the base portion 5, and the first long blade tip portion 11 of the long blade 7, which has the longest length L1 from the groove portion 15, is positioned higher in the tip direction than the first short blade tip portion 13 of the short blade 8, which has the longest length L2 from the groove portion 15.

A hole saw is provided, comprising a shaft, a body, and a plurality of blade assemblies slidably mounted on the body. The hole saw is adjustable in size, allowing a user to change the spacing of the blade assemblies to alter the dimensions (e.g., the diameter) of the hole cut by the hole saw. In one embodiment, the body has a plurality of blade pairs, and each blade assembly is slidably mounted on one of the plurality of blade pairs. When a first blade assembly of the plurality of blade assemblies is moved along its respective blade pair, a first blade in each of the blade pairs rotates, and the other blade assemblies move along their respective blade pairs.

To provide a hole making device which can easily make a hole in a direction perpendicular to a processed object even when a hole making tool, such as a hole saw, is used, and to provide a hole making method.SOLUTION: A hole making device includes a hole making tool and a center core member. The hole making tool includes an internal space in which blade parts are disposed on one circumference and which is recessed to the side of a rotary tool attachment part. The center core member includes: a center core bottom part held by a processed object; a center core side part which contacts with an inner wall of a wall surface of the hole making tool which forms the internal space of the hole making tool; and center core holding means which holds the center core member and the processed object. The center core side part and the processed object are installed perpendicularly.SELECTED DRAWING: Figure 1

A hole saw breaching firefighting nozzle may comprise outer and inner housings, a diffuser assembly, hole saw assembly, and drivetrain assembly. The inner housing may be concentrically disposed within the outer housing to create an annular flow region. The diffuser assembly may comprise an end cap coupled to an upstream end of the outer housing. An orifice plate may be coupled to the end cap via linear bearing shafts. A flow control ring may slide forward or rearward between the orifice plate and end cap via linear bearing shafts to control fluid flow communication between the orifice plate and annular flow region. The drivetrain assembly may rotatably couple to the orifice plate. The hole saw assembly may operably couple to the drivetrain assembly. The inner housing may slide forward and rearward. The downstream end of the drivetrain assembly may be in fluid communication with the annular flow region.

A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a body, a first engagement member moveable relative to the shank, the first engagement member engaging the hole saw to releasably secure the hole saw to the shank, and a second engagement member moveable relative to the shank, the second engagement member engaging the pilot bit to releasably secure the pilot bit to the shank. The body is moveable to a first position where the hole saw and the pilot bit are secured to the arbor assembly, to a second position where the first engagement member disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second engagement member disengages the pilot bit, allowing removal of the pilot bit from the shank.

A hole saw having an internal saw with a circular sidewall including a working end including teeth and a backwall connected to the sidewall. The backwall includes an aperture concentrically located with respect to the circular sidewall for receiving a pilot drill designed to extend beyond the working end of the circular sidewall. The hole saw also has an external saw with a circular sidewall with a greater diameter than the circular sidewall of the internal saw. The circular sidewall of the external saw has teeth and an oppositely located proximal end that includes tangs separated by notches. A base plate is fastened to the circular sidewall of the external saw. The base plate includes a plurality of apertures for fixing the base plate to the backwall of the internal saw and locating the circular sidewalls concentric with respect to each other.

Hole saw with a drive shaft (1) which can be driven in rotation about an axis of rotation (D), a holding member (2) which has radial guides (3) and an adjusting member (4) which can be rotated relative to the holding member (2) for adjusting the hole diameter and which has a spiral slot (9) open to the holding member (2), wherein a fastening element (5) is guided and can be fastened in each of the radial guides (3), which fastening element is connected to a saw element (7) and a control extension (8) which engages in the spiral slot (9), wherein the spiral slot (9) is also open to a free space (10) of the adjusting member (4) which is opposite the holding member (2), characterized by a circumferential limitation of the free space (10) which has at least one window (11).

The utility model relates to a rope saw side face supporting telescopic mechanism of a hole mining sawing machine, which comprises a sawing arm rod located on the side face of a machine frame of the hole mining sawing machine, the sawing arm rod is connected with the machine frame through a telescopic arm, and an electronic ruler located on the side of the telescopic arm is connected between the sawing arm rod and the machine frame. According to the rope saw side face supporting telescopic mechanism of the hole mining sawing machine, the electronic ruler located on the side of the telescopic arm is connected between the sawing arm rod and the rack, when the telescopic arm drives the sawing arm rod to conduct telescopic adjustment, the electronic ruler (namely a linear displacement sensor) synchronously stretches out and draws back, the specific stretching amount can be accurately detected, and the working efficiency is improved. The telescopic adjusting amount of the sawing arm rod can be accurately controlled, and the adjusting precision of the sawing arm rod is improved.

The purpose of the present disclosure is to provide a power tool system capable of reducing kickback. A power tool system (100) comprises: a power tool body (1); and a transmission mechanism (2). The power tool body (1) has an output shaft (12) that rotates by the motive power of a motor. The transmission mechanism (2) transmits the rotation of the output shaft (12) to a hole saw (A1). The transmission mechanism (2) has a planetary gear (213) and a drill unit (4). The planetary gear (213) rotates in conjunction with the rotation of the output shaft (12) in a state in which the relative position with the output shaft (12) is fixed. The drill unit (4) rotates integrally with the planetary gear (213). The drill unit (4) comes into contact with a work target (X1) before the hole saw (A1) comes into contact with the work target (X1).

The present invention provides a quick change arbor, which can realize quick replacements of tools such as drill bit, hole saw and batch head on electric drills. The quick change arbor comprises an arbor main body, a pulling ring and a locking part. In the present invention, the tool is positioned and installed in an assembling position through the arbor main body, and the locking part within the first guiding groove abuts against the surface of the tool, so that the tool is tightly locked within the assembling position, thus to effectively eliminate the gaps occurred after the tool is assembled.

A hole-saw, including a sidewall and an endcap, is provided. The endcap includes projections that fit within notches of the sidewall to form a brazed or welded joint that couples the endcap to the cylindrical sidewall. The projections extend through the notches and are brazed or welded to the base of the sidewall. The endcap couples to the sidewall to form a cylindrical hole saw body. The endcap rotates and supports the hole-saw during operation.