A cutting tool (35) for machining a differential case, the cutting tool (35) being attached to a machining apparatus and used to perform cutting on a spherical inner surface of a differential case (10), the cutting tool (35) including: a shaft part (50); a cutting edge (51) laterally protruding from the shaft part (50); a fixing part (53) formed at one end side of the shaft part (50) and that is for fixing the shaft part (50) to the machining apparatus; and a retaining part (54) formed at the other end side of the shaft part (50) and that is for retaining the shaft part (50) by the machining apparatus, wherein the cutting tool (35) is able to perform cutting on the spherical inner surface of the rotating differential case (10) in a both-ends-held state in which both the fixing part (53) and the retaining part (54) are supported by the machining apparatus.

A cutting tool (35) for machining a differential case, the cutting tool (35) being attached to a machining apparatus and used to perform cutting on a spherical inner surface of a differential case (10), the cutting tool (35) including: a shaft part (50); a cutting edge (51) laterally protruding from the shaft part (50); a fixing part (53) formed at one end side of the shaft part (50) and that is for fixing the shaft part (50) to the machining apparatus; and a retaining part (54) formed at the other end side of the shaft part (50) and that is for retaining the shaft part (50) by the machining apparatus, wherein the cutting tool (35) is able to perform cutting on the spherical inner surface of the rotating differential case (10) in a both-ends-held state in which both the fixing part (53) and the retaining part (54) are supported by the machining apparatus.

A hole inner-surface cutting apparatus includes a working head composed of a rotatable body having a cutting tool and a main body, a rotation rod for rotating the rotatable body, and a stroke rod for stroking the working head. At least three positioning mechanisms for positioning the working head along a radial direction in the penetrating hole is provided on the main body. Each of the positioning mechanisms has three sliders arranged radially, guide rollers respectively disposed on distal ends of the sliders, a piston for pressing the sliders radially outward, and a fluid pressure chamber for actuating the piston. Further provided is a controller for controlling fluid pressures in the fluid pressure chambers of the positioning mechanisms independently from each other.

Machining tool for internal machining of a shaft (2) with an inner bore (3), such as an aircraft engine turbine shaft (fan mid shaft). The machining tool has an external boring bar (6) support device (5), and a boring bar (6) having a diameter smaller than a smallest opening on one side (4) of the inner bore (3) of the shaft (2). The boring bar (6) has a radially extensible cutting insert (7), and an end part (6b) of the boring bar (6) is rotatably connected to a main part (6a) of the boring bar (6). The end part (6b) is provided with one or more radially moveable guiding pads (8).

An axle boring assembly includes a portable power head or drive unit, a bearing pack to which the drive unit is attached, an adjusting base to which the bearing pack is adjustably secured and a mounting assembly which fits over a motor vehicle axle and to which the adjusting base is secured. The mounting assembly comprises a first section having axially spaced apart front and rear clamps and a substantially identical second section with matching spaced apart front and rear clamps. Threaded fasteners extend between the front and rear clamps and may be rotated to secure the mounting assembly about the end of the axle. Each clamp includes jaws which contact the axle and which may be selected from sets of various sizes and configurations to ensure accurate and suitable engagement of the axle.

An axle boring assembly includes a portable power head or drive unit, a bearing pack to which the drive unit is attached, an adjusting base to which the bearing pack is adjustably secured and a mounting assembly which fits over a motor vehicle axle and to which the adjusting base is secured. The mounting assembly comprises a first section having axially spaced apart front and rear clamps and a substantially identical second section with matching spaced apart front and rear clamps. Threaded fasteners extend between the front and rear clamps and may be rotated to secure the mounting assembly about the end of the axle. Each clamp includes jaws which contact the axle and which may be selected from sets of various sizes and configurations to ensure accurate and suitable engagement of the axle.

An axle boring assembly includes a portable power head or drive unit, a bearing pack to which the drive unit is attached, an adjusting base to which the bearing pack is adjustably secured and a mounting assembly which fits over a motor vehicle axle and to which the adjusting base is secured. The mounting assembly comprises a first section having axially spaced apart front and rear clamps and a substantially identical second section with matching spaced apart front and rear clamps. Threaded fasteners extend between the front and rear clamps and may be rotated to secure the mounting assembly about the end of the axle. Each clamp includes jaws which contact the axle and which may be selected from sets of various sizes and configurations to ensure accurate and suitable engagement of the axle.

A hole inner-surface cutting apparatus includes a working head composed of a rotatable body having a cutting tool and a main body, a rotation rod for rotating the rotatable body, and a stroke rod for stroking the working head. At least three positioning mechanisms for positioning the working head along a radial direction in the penetrating hole is provided on the main body. Each of the positioning mechanisms has three sliders arranged radially, guide rollers respectively disposed on distal ends of the sliders, a piston for pressing the sliders radially outward, and a fluid pressure chamber for actuating the piston. Further provided is a controller for controlling fluid pressures in the fluid pressure chambers of the positioning mechanisms independently from each other.

The present disclosure is directed to a gearbox repair apparatus for repairing a bore hole of a gearbox torque arm. In certain embodiments, the apparatus includes a mounting structure configured to mount to the torque arm. The mounting structure includes a through hole that aligns with the bore hole of the torque arm when mounted thereto. As such, when mounted to the torque arm, the mounting structure is configured to locate a boring bar at a center of the bore hole such that the boring bar is perpendicular to a face of the torque arm. Further, the mounting structure is configured to receive the boring bar through the aligned through hole and bore hole such that, when inserted therethrough, the boring bar is configured to machine and thus repair the bore hole.

A feed assembly, a boring head and an alignment device. The feed assembly may include a feed mechanism; an adjustment mechanism to adjust a feed rate of the feed mechanism; and a gage to indicate the feed rate. The boring head may include a body supportable on and for rotation with the bar; and a tool holder to support a tool to work on a workpiece and supported for radial movement on the body to adjust a radial position of the tool. An alignment device may include a clamp lockable in an axial position on the bar; an alignment member engageable with a bore of a workpiece; and an adjustment member between the locking clamp and the alignment member, the adjustment member and the alignment member include complementary threads, the adjustment member being rotatable about the axis to move the alignment member relative to the clamp along the axis.