A grinding tool for grinding an engine includes a main body with a central coupling region for connecting to a rotary drive of a grinding machine, the main body having a substantially rotationally symmetrical configuration with respect to an axis of rotation. The grinding tool also includes a grinding layer on the main body that extends over an outer circular ring zone of the main body, at least one feed for a cooling fluid, and a substantially circular cover plate arranged substantially normal to the axis of rotation and forming an axial gap on the main body. The axial gap is in fluid communication with the feed and the grinding layer so that a cooling fluid fed by the feed can be passed via the axial gap to the grinding layer.

A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate.

A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate.

A grinding tool for grinding an engine includes a main body with a central coupling region for connecting to a rotary drive of a grinding machine, the main body having a substantially rotationally symmetrical configuration with respect to an axis of rotation. The grinding tool also includes a grinding layer on the main body that extends over an outer circular ring zone of the main body, at least one feed for a cooling fluid, and a substantially circular cover plate arranged substantially normal to the axis of rotation and forming an axial gap on the main body. The axial gap is in fluid communication with the feed and the grinding layer so that a cooling fluid fed by the feed can be passed via the axial gap to the grinding layer.

A grinding tool for grinding an engine includes a main body with a central coupling region for connecting to a rotary drive of a grinding machine, the main body having a substantially rotationally symmetrical configuration with respect to an axis of rotation. The grinding tool also includes a grinding layer on the main body that extends over an outer circular ring zone of the main body, at least one feed for a cooling fluid, and a substantially circular cover plate arranged substantially normal to the axis of rotation and forming an axial gap on the main body. The axial gap is in fluid communication with the feed and the grinding layer so that a cooling fluid fed by the feed can be passed via the axial gap to the grinding layer.

A tire pre-conditioning system includes a first mandrel, a second mandrel spaced apart from the first mandrel, and a controller in communication with the first mandrel and the second mandrel. The first mandrel is fixedly attached to a first shaft and including a first tapered sidewall. The second mandrel is fixedly attached to a second shaft and including a second tapered sidewall. The controller is operable to axially move the first mandrel and the second mandrel toward one another until the first and second tapered sidewalls are opposing respective beads of a tire, and supply pressurized fluid into an internal cavity of the tire to inflate the tire. The inflating causing the beads to move relative to mandrels while contacting the opposing respective tapered sidewalls to burnish the beads of the tire.

A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate.

A grinding stroke control device for a valve stem grinding apparatus is fixed to a processing machine and provided for gripping a valve stem or a test bar. Using the hand wheel, the dial gauge and the positioning seat can obtain an initial position, then moving the measuring meter of the positioning mechanism along the transverse direction to make sure the valve stem has the right length with a standard valve clearance. By such arrangements, the grinding stroke control device for a stem valve grinding apparatus of the invention can have a less complicated structure and therefore is more convenient to operate.

A method for manufacturing a wire saw apparatus including a wire supply reel; a long roller; wire guides; a wire winding reel; and a tension arm controlled to move within a control angle of ?A (?) set in advance and configured to apply tension to the wire, the method including the steps of: measuring a surface roughness Rmax of the long roller; measuring an angle a (?) of the tension arm at which the tension arm swings outside a range of the control angle set in advance while the wire is extending from the wire supply reel; calculating R1?2?A?(|a|+A)=R2, where R1 (?m) represents the measured surface roughness Rmax of the long roller; and adjusting the surface roughness Rmax of the long roller to the calculated numerical value R2 or less. The method for manufacturing a wire saw apparatus can prevent the tension arm from greatly swinging outside the control range.

Methods are disclosed for performing operations such as cleaning, inspection or data acquisition on an external surface of a hollow cylindrical tubular. Preferred embodiments include providing a fluid dispenser and an abrasion assembly on a buggy that travels up and down the length of the tubular as the tubular rotates. The fluid dispenser includes nozzles that dispense cleaning fluids onto the tubular's external surface. The abrasion assembly includes a swivel brush and a brush train providing different styles of abrasion cleaning of the tubular's external surface. Preferred embodiments include robotically monitoring abrader contact against the external surface of the tubular, and, in response, dynamically adjusting the distance between the external surface of the tubular and the abrasion assembly.