A method for machining a crankcase includes providing a machining device. The machining device comprises a mechanical machining unit and a cooling/rinsing system, which is configured to cool and/or rinse the mechanical machining unit or a surface which is to be machined. The method also includes creating a structure in a cylinder wall of a crankcase using the mechanical machining unit. The method also includes using a fluid stream of the cooling/rinsing system to reshape at least certain regions of the structure.

The embodiments described herein relate generally to improved fit duct liner insulation for curvilinear ducts in HVAC, exhaust, or other similar gas flow systems. A duct liner insulation for a curvilinear duct may include an insulation board having a first major surface and a second major surface. The duct liner insulation further includes a plurality of rows of kerfs in the first major surface of the insulation board configured to allow the insulation board to flex in a direction of the width of the insulation board such that insulation board is foldable into a curvilinear configuration. Each of the kerfs has a v-shaped cross section with sidewalls extending from a kerf base portion at or near the second major surface of the insulation board to the first major surface of the insulation board. The sidewalls extending at an angle from 10 degrees to 20 degrees relative to each other.

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment.

The embodiments described herein relate generally to improved fit duct liner insulation for curvilinear ducts in HVAC, exhaust, or other similar gas flow systems. A duct liner insulation for a curvilinear duct may include an insulation board having a first major surface and a second major surface. The duct liner insulation further includes a plurality of rows of kerfs in the first major surface of the insulation board configured to allow the insulation board to flex in a direction of the width of the insulation board such that insulation board is foldable into a curvilinear configuration. Each of the kerfs has a v-shaped cross section with sidewalls extending from a kerf base portion at or near the second major surface of the insulation board to the first major surface of the insulation board. The sidewalls extending at an angle from 10 degrees to 20 degrees relative to each other.

What is disclosed is an improved method of sawing wood and an improved sawmill capable of producing vertical grain lumber. Vertical grain lumber is a preferred lumber for use, for example, in trim applications. The improved method and improved sawmill both utilize a track having a carriage, the carriage has a vertical blade and a horizontal blade. The vertical blade and the horizontal blade travel on the carriage down the track. The log is then rotated for another length of lumber to be cut. In a preferred embodiment the sawmill utilizes a skewer for adjusting the log. In a preferred embodiment the log is held by a lathe that can be moved. In a preferred embodiment the log is placed on a skewer before it is engaged by the lathe.

What is disclosed is an improved method of sawing wood and an improved sawmill capable of producing vertical grain lumber. Vertical grain lumber is a preferred lumber for use, for example, in trim applications. The improved method and improved sawmill both utilize a track having a carriage, the carriage has a vertical blade and a horizontal blade. The vertical blade and the horizontal blade travel on the carriage down the track. The log is then rotated for another length of lumber to be cut. In a preferred embodiment the sawmill utilizes a skewer for adjusting the log. In a preferred embodiment the log is held by a lathe that can be moved. In a preferred embodiment the log is placed on a skewer before it is engaged by the lathe.

A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.

A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.

A sawing and drilling combined machining device includes a frame, a clamping mechanism, a sawing mechanism and a drilling mechanism; the frame includes a first end for mounting the clamping mechanism, a second end for mounting the drilling mechanism, and a third end for mounting the sawing mechanism, the first end and the second end are two opposite ends of the frame in a horizontal direction, and the third end is at an upper end or a lower end of the frame between the first end and the second end.

A sawing and drilling combined machining device includes a frame, a clamping mechanism, a sawing mechanism and a drilling mechanism; the frame includes a first end for mounting the clamping mechanism, a second end for mounting the drilling mechanism, and a third end for mounting the sawing mechanism, the first end and the second end are two opposite ends of the frame in a horizontal direction, and the third end is at an upper end or a lower end of the frame between the first end and the second end.