Abstract: In a wheel spindle device wherein a plurality of grinding wheels are attached in a juxtaposed relation to a wheel spindle rotatably carried on a wheel head of a grinding machine, a reference position for specifying a position in the circumferential direction of the grinding wheel is provided on a core member of each of the grinding wheels, and a plurality of inclined grooves at predetermined angular intervals are formed on a grinding surface of each grinding wheel to be inclined relative to the circumferential direction of each grinding wheel. In order that the fluctuations in the dynamic pressure and the grinding resistance between respective grinding wheels and workpiece portions ground therewith do not grow as a combined or synergy effect, the inclined grooves on each grinding wheel are shifted in angular phase from those on another grinding wheel, so that grinding efficiency and accuracy can be enhanced.

Abstract: A machining spindle includes an inner shaft arranged for carrying a first tool and an outer shaft for carrying a second tool. The shafts are mounted for rotation about a common axis and for axial movement relative to each other. The inner shaft is mounted within the outer shaft, which is journaled in a main body of the spindle. The machining spindle also includes a fluid pressure-driven actuator arrangement for driving the shafts between a first state and a second state differing in relative axial positions. The actuator arrangement is provided within and rotates with the outer shaft.

Abstract: A grinding assembly includes a motor with a transmission pipe connected thereto and a male connector is connected to the transmission pipe. A spiral pipe is received in the transmission pipe and a steel cable extends through the spiral pipe. A distal end of the steel cable is connected to a driving member which extends through a passage in the male connector. A handle has a female connector which is connected with the male connector. The female connector includes an axle received therein which includes a connection hole defined in a first end thereof. The driving member is engaged with the connection hole. A grinding wheel is connected to a second end of the axle. A bearing is received in the male connector and the driving member extends through the bearing so that when the driving member rotates, the driving member does not contact with an inner periphery of the passage and can be operated at high speed.

Abstract: An angle grinder is provided including a trigger assembly for selectively actuating the angle grinder. A particle separation assembly is provided for the removal of any dust, particle, or artifacts that may have entered into the housing of the angle grinder. A brush biasing system is also provided to ensure proper and efficient operation of the motor of the angle grinder. An overload monitoring system is included to monitor the loading on the motor. A clutch mechanism is also included to prevent overloading on the motor of the angle grinder. A gear wheel lock mechanism is also provided to prevent the wheel spindle from rotating during installation or removal of a grinding wheel on the wheel spindle. An anti-locking flange system is also included to prevent the over-tightening of the flanges and the grinder wheel during the operation of the angle grinder. A gear case labyrinth feature is also provided.

Abstract: A fiber optic polishing apparatus is disclosed including a single degree-of-freedom (DOF) gear transmission system, a pressurizing module, a fixture module, and a housing assembly. The single DOF gear transmission system would enable a fiber optic polishing machine, . or polisher to be driven by only one motor, or by human hand. The manual polisher is a unique field polishing machine where electricity or battery is not available or not allowed. Both manual polisher and motorized polisher have the following features: polishing up to four connectors or ferrules simultaneously; adjustable force ensures consistent finish for a wide variety of connector types and the number of connectors in the fixture; quick release for convenient removal of polish fixture; low center of gravity for high stability; small footprint for multiple-machine operation to avoid time-consuming film change.

Abstract: The invention relates to a manual grinding tool comprising a rotating grinding head (7). The inventive grinding device is characterised by a guiding device that is connected to the grinding tool (8) and can be applied to a workpiece (19) in a sliding and/or rolling manner. The grinding head (7) assumes a fixed position in terms of the guiding device which is used to press the grinding tool against the workpiece (19) in at least one direction without tilting.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: In a method for honing a bore having first and second sections sequentially arranged in an axial direction of the bore, wherein the first section is hardened so that the first and second sections have different hardness, a honing tool is radially supported by positioning guides of the honing tool on the second bore section. first section is machined with honing stones arranged on the honing tool to remove material from the first section. During machining of the first section, the honing tool is expanded by feeding the honing stones according to a defined feeding mode against a surface of the first section by a force-guided electro-mechanical advancement. During machining of the first section, the working stroke of the honing tool is adjusted continuously at least toward the end of the honing process. Feeding of the guides is realized independently of feeding of the honing stones.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: A grinding apparatus for use with an endoscope for viewing and blending defects on a turbine engine blade is provided. In one preferred embodiment air pulses from an air supply cause a grinding head on the end of a grinding tool to reciprocate at a predetermined speed. The position of the grinding head is fixed via the operator via a trigger on the grinding tool which articulates an outer portion of a support tube of the grinding tool. In another preferred embodiment, fluid is used to reciprocate the grinding head.

Abstract: A grinding assembly for shaping work pieces that includes one or more grind spindles. Each of the grind spindles include two independent grinding wheels driven by a single spindle drive. The grind spindles translate horizontally to perform both edge and face grinding with a single grind spindle. A non-contact position sensor in a work spindle measures work spindle displacement during grinding and provides feedback to the grind spindle to regulate the force imparted on the work piece by the grind spindle. In variations, an abrasive wheel disposed radially with respect to an axis of spindle rotation is utilized to perform edge grinding of the work piece. In other variations cleaning, polishing and grinding are carried out in a single grinding assembly. In yet other variations, a wheel dressing apparatus is utilized to dress the wheel when one or more forces to maintain productivity of the grind wheel exceed a threhold.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: Methods and devices are provided for end rounding filaments for use on brushes. The devices include an air driven planetary gear system rotating a sanding wheel through a varied elliptical path that attacks the filaments from all sides.

Abstract: The present invention relates to a structure improvement of electric grinder, and more particularly to the structure improvement of an electric grinder whose components can be quickly assembled and disassembled.

Abstract: An apparatus, system, and method thereof for precision material positioning and precision shaping of materials. The apparatus includes positioning device which includes allows precision rotatable positioning of a group of material shaping devices, such as grinding wheels and the like. The system includes both the aforementioned device and a second device which has a two-section positioning device which allows precision positioning of an engaged workpiece.

Abstract: An eccentric plate grinder has a cylindrical housing having a lower region with an end-side edge, a rotatable grinding plate associated with a lower region, a ring-shaped brake positioned between the grinding plate and the edge, the grinding mechanism having an elastic lip with which it is supported on the grinding plate and applies a braking force to the grinding plate, the brake also tightly closing a suction chamber inside the housing in a region of the grinding plate from outside, the brakes having throughgoing openings for ventilating the suction chamber, and further comprising valve-shaped flaps operative for releasing and closing the throughgoing openings.

Abstract: A motorized spindle assembly for a grinding wheel is fabricated with an opening extending through the spindle casing, and stator and so as to extend in the direction of the spindle axis of rotation at least the length of the stator. The opening is of a size, depth, configuration and disposition so that when the spindle assembly is utilized to grind a workpiece and to do so is moved towards the workpiece, that portions of the workpiece are received within the opening thus permitting the spindle assembly and its grinding wheel to be moved as close as possible to the workpiece axis of rotation. The motorized spindle assembly is carried by a wheelhead for coaction with an additional spindle assembly carrying a grinding wheel with a larger radius. The larger radius grinding wheel is utilized to rough grind cam lobes and the smaller grinding wheel is utilized to finish grind the cam lobes and to grind concave cam contours for the cam lobes.

Abstract: A power waxer is provided which includes structure for electrically connecting a power cord thereto while minimizing instances of accidental disconnection therebetween with the structure being located so as to substantially remove the power cord as an impediment to the operation and ability to exert proper control over the waxer during operation thereof. Also, there is provided structure for controlling torque output of a motor of a power waxer to selectively change the torque output for different stages of the waxing process.

Abstract: An apparatus to process, in particular, curved surfaces using one or more grinding or polishing tools which includes a housing (2) having a drive system (3, 20, 19, 12) powering at least one tool seat (1) particularly for a grinding or polishing tool (W) into rotation about a longitudinal axis (4). For the purpose of multi-sided pivoting displacement of the axis of rotation (4) within a predetermined angular range (&agr;), the tool seat (1) rests pivotably in a holder (5) of the housing (2), the holder (5) including a shell (7) having an outer contour in the shape of a spherical segment and being pivotably received in an inner contour of a seat (8) also in the shape of a spherical segment. The drive system (3, 20, 19, 12) includes a pivoting ball-joint (6) coupling it to the tool seat (1) in order to drive the seat into rotation in every pivoted position.

Abstract: An improved multi-purpose, direct-drive, water-driven rotary tool having improved torque and power. The present invention includes a housing having a central cavity, an impeller with angled, beveled blades around its periphery, a drive shaft connected to a rotatable mounting pad or backing pad that contains a disk with a grinding or sanding surface that is removably attached thereto. A high pressure water inlet conduit includes a changeable nozzle to allow using the tool with different water sources. The water exiting the nozzle strikes the blades of the impeller, rotating the impeller, which rotates the backing pad and sanding disk. Water is strategically diverted through a bearing mounting plate having holes by a shroud or angular flange having an angular periphery that allows the expended water from the impeller to be efficiently expelled peripherally around the outside of the main cavity of the housing.

Abstract: A method is provided for processing a metal foil sheet to produce magnetic recording media. The method comprises providing an elongate metal foil sheet having a first side and a second side. The sheet is advanced through a plurality of processing stations in equal unit length segments such that each segment receives the same treatment to form a magnetic recording medium from each segment. Method are also provided to prepare the foil surfaces by polishing, texturing, cleaning, and stress relieving, to coat the prepared surfaces with at least one metal layer, to finish the coated layers by buffing, burnishing, and lubricating, and to form disk units from the prepared, coated and finished surfaces.

Abstract: A carrier for semiconductor wafers to be polished comprises a backing pad vulcanized to a pressure plate. The backing pad is formed of a rubber material such as neoprene, SBR or natural rubber. An adhesive film of a thermosetting, thermally reactive material forms an integral bond between the backing pad and pressure plate. The backing pad, adhesive film and pressure plate together comprise a nearly ideally elastic assembly. The exposed face of the backing pad is profiled to a desired profile without effecting crumbling of the rubber material.

Abstract: A polishing apparatus prevents uneven wear of the platen and improves the operating rate of the apparatus. The polishing apparatus provided with a platen 1 divided into an inner peripheral platen portion 11 and an outer peripheral platen portion 13 and with a carrier 5, wherein by making the inner peripheral platen portion 11 and the outer peripheral platen portion 13 rotate in opposite directions and setting the rotational speeds of the inner peripheral platen portion 11 and the outer peripheral platen portion 13 so that the mean relative speed of a wafer 200 and the inner peripheral platen portion 11 and the mean relative speed of the wafer 200 and the outer peripheral platen portion 13 become substantially equal, it becomes possible to make the amount of wear of the polishing pad 11a of the inner peripheral platen portion 11 and the amount of wear of the polishing pad 13a of the outer peripheral platen portion 13 substantially equal.

Abstract: An ultrasonic vibration composite grinding tool is disclosed wherein a plurality of small-sized grinding wheels are arranged for carrying out grinding of a ground material while applying vibration to the ground material, to thereby ensure stable operation of the grinding tool to accomplish efficient grinding of the ground material even when the ground material is large-sized. A grinding structure and a vibration structure are arranged. The grinding structure includes a rotatable base having a rotation axis and a plurality of grinding wheels formed into the same configuration and each including a micro-cutting surface. The grinding wheels are arranged on one surface of the base in a manner to be spaced from each other at predetermined intervals in a circumferential direction of the base about the rotation axis of the base. The vibration structure functions to vibrate the grinding wheels.

Abstract: A device for the timely and accurate inspection of and polishing of large threaded bolts. The device is easily reconfigured for effective use on a large number of different sized bolt threads by replacing the polishing stones, depending on the dimensions of the particular bolt thread. After a metal layout dye is placed on the bolt threads the rotating polishing stones reveal the upset and damaged threads that must be repaired before replacing the corresponding nut.

Abstract: A machining spindle apparatus has a hydrostatic bearing for machine tools. The machining spindle apparatus includes a built-in motor built into the middle of a housing, as well as front and rear hydrostatic bearings respectively mounted on the front side and the rear side of the housing. A machining spindle is driven by the built-in motor and rotatably supported by the front and rear hydrostatic bearings. The front hydrostatic bearing comprises a radial bearing pocket and a thrust bearing pocket. In addition, a pair of pneumatic seals lie over the radial and thrust bearing pockets. The rear hydrostatic bearing includes a radial bearing pocket and a constant-pressurized oil chamber. The constant-pressurized oil chamber operates as a piston cylinder. Accordingly, a predetermined pressure acts forward, i.e. opposite the thrust bearing pocket of the front hydrostatic bearing. And another pair of pneumatic seals lies over both of the radial bearing pocket and the constant-pressurized oil chamber.

Abstract: A sander (1) has a motor (3) with a motor shaft (4) mounted in a bearing box (11) via an eccentric ball bearing (10). Coupled to the bearing box (11) is a pad (12) having a bulged square shape in a horizontal cross section. The sander (1) further includes a skirt (6) with an opening (6a) on which a synthetic (polyurethane rubber) brake ring (17) is mounted. The brake ring (17) comprises an outer peripheral portion (18) and a plurality of contact portions (19) disposed at regular intervals around the outer peripheral portion (18). Each contact portion (19) is bulged toward the center of the brake ring (17) with both ends connected to the outer peripheral portion (18). Also, the contact portions (19) are elastic so as to deform in the radial direction. The contact portions (19) together form a through-hole (21) which is slightly smaller than the bearing box (11) for receiving the bearing box.

Abstract: The invention provides a braking system for a powered oscillating hand tool which tool comprises (i) a housing; (ii) a drive unit (2) having an electric motor (4) and a drive shaft (8); (iii) a bearing (28) mounted on the drive shaft (8) and located radially eccentrically relative to the drive shaft (8), adapted to drive a second drive shaft (26); (iv) means (22) for mounting an oscillating head (24) on the second drive shaft (26) and (v) brake means (30) for providing braking between the oscillating head (24) and the housing (6). The brake means (30) comprises (i) a reaction surface (35, 46); (ii) a resilient support member (32, 40) formed from a resilient material which material, under compression, provides a resultant load on the contact surface and (iii) an abrasion resistant contact layer (34, 44) mounted on the support member (32, 40).

Abstract: A magnetic bearing apparatus comprises a pair of radial magnetic bearings arranged on both sides in the axial direction of an axial magnetic bearing. A pair of first touchdown bearings are arranged at both ends of a spindle. Annular slide bearings are mounted as second touchdown bearings for receiving the spindle on inner peripheral parts of electromagnets in the axial magnetic bearing. The radial internal clearance between the slide bearing and the spindle is larger than the radial internal clearance between the first touchdown bearings and the spindle and is smaller than the radial internal clearance between the radial magnetic bearings and the spindle. Even if a central part of the spindle is deflected at the time of emergency stop, both the first touchdown bearings and the slide bearings receive the spindle, so that the load on the first touchdown bearings can be reduced.

Abstract: A machine for simultaneously milling and grinding a workpiece comprises milling and grinding wheels rotatable about respective first and second parallel axes, the second axis being offset radially with respect to the first axis. A single motor drives the milling and grinding wheels at different relative speeds. The grinding wheel is mounted to a hub which includes an axially flexible portion to enable the grinding surface to be axially adjusted. The milling wheel includes an array of milling cutters with a large gap formed between leading and trailing ones of the milling cutters to accommodate the offset grinding wheel. The radial spacing of the milling cutters from the axis of rotation of the milling wheel progressively increases from the leading milling cutter to the trailing milling cutter.

Abstract: A metal working machine which has a tool support on which a rotatable working spindle is mounted which can be acted upon by oil-free compressed driving air. A separate duct provides oil-free compressed braking air which serves to stop the tool support after compressed air to the spindle has been switched off. Additionally, an oil-free mist is provided to the machine via a duct for lubricating the bearings of the tool support.

Abstract: An orbital disk grinder comprises a housing, grinding disk which can be applied to a working surface, a motor for moving the grinding disk so that the grinding disk gyrates in a circular orbit and simultaneously rotates about its axis, and speed control means operative for setting a speed of the grinding disk low when a normal force acting on the working surface is low, and high when the normal force acting on the working surface is high, so that a normal force acting on the grinding disk serves as a setting variable of the speed control means.

Abstract: A grinding wheel spindle assembly comprises a first casing and a second casing spaced apart from and facing the first casing. A shaft has one end fixed to the first casing and another opposite end fixed to the second casing. A hollow, cylindrical-shaped rotor is rotatably disposed over the shaft between the first and second casings for rotation relative to the shaft. A flange having opposite side surfaces is connected to an outer circumference of the rotor for rotation therewith. A grindstone is connected to an outer circumference of the flange for rotation therewith. A radial magnetic bearing magnetically supports the rotor in its radial direction, and an axial magnetic bearing magnetically supports the rotor in its axial direction. At least one driving motor is provided for rotating the rotor about a center axis thereof.

Abstract: A grinding machine provided with a spindle rotating under the influence of a cantilever mounted rare earth permanent magnet motor. Hydrostatic fluid film bearings are provided between the ends of the spindle and a bronze bearing to support the spindle in such a manner so as to eliminate wear. A single oil reservoir is used to supply oil to the hydrostatic bearings, as well as to the cooling jacket of the motor.