Abstract: A tool holder (10) for a tool which can rotate about an axis of rotation (D) comprises a clamping shank (18) which, in an end shank region, has a clamping formation (14) with an accommodating opening (16) which is central in relation to the axis of rotation (D) and is intended for accommodating a retaining shank of the tool, there being provided, on the lateral circumference of the accommodating opening (16), at least one clamping surface for securing the retaining shank of the tool with press-fit action. According to the invention, on an axial section which forms an axial bracing section (VA), the tool holder (10) has a bracing arrangement (20) which, at least during operation of the tool holder (10), subjects the tool holder (10) to a bracing force (Vk) with a bracing force component (Vk) acting in the axial direction.

Abstract: A tool holder (10) for a tool which can rotate about an axis of rotation (D) comprises a clamping shank (18) which, in an end shank region, has a clamping formation (14) with an accommodating opening (16) which is central in relation to the axis of rotation (D) and is intended for accommodating a retaining shank of the tool, there being provided, on the lateral circumference of the accommodating opening (16), at least one clamping surface for securing the retaining shank of the tool with press-fit action. According to the invention, on an axial section which forms an axial bracing section (VA), the tool holder (10) has a bracing arrangement (20) which, at least during operation of the tool holder (10), subjects the tool holder (10) to a bracing force (Vk) with a bracing force component (Vk) acting in the axial direction.

Abstract: A burner for liquid fuels such as light, medium and heavy oil, in which a fuel supply pipe is concentrically located in an air supply pipe and partially enclosed by a sleeve carrying air. A spray diffuser and a twist-producing member encloses the fuel supply pipe upstream of the spray diffuser. The twist-producing member has a fixed blower wheel and receives combustion air from the periphery thereof. The combustion air quantity is regulatable upstream of the burner head as a function of the prevailing fuel flow. A space located between the twist-producing member and the air supply pipe, holds two additional air supply pipes. One of these additional air supply pipes, an innermost pipe, has an end cone directed towards the outside. Coaxially downstream from the twist-producing member enclosing the fuel supply pipe, there are two additional twist-producing members with opposite twist direction enclosing each other.

Abstract: A burner for liquid fuel in which a pressure atomizer jet is located concentrically in an air supply pipe. A potlike body is located between the discharge opening of the air supply pipe and the discharge opening of the burner jet. The body or member is opened towards the combustion chamber, and has a shell having radial openings and extending to the discharge opening of the air supply type for closing it. The potlike member has a bottom constructed as a baffle plate with a center opening and radial slots emanating from it. Upstream of this baffle plate, there is located another potlike member which encloses a space containing the atomizer jet and the ignition electrodes. The bottom of the other potlike member is penetrated by a pipe whose discharge opening is downstream of the ignition electrodes between them. The diameter of the rim of the other potlike member is smaller than the diameter measured by the outer ends of the radial slots and is larger than the diameter of the center opening of the baffle plate.

Abstract: A burner for liquid fuels, of the type which is driven with an approximately stoichiometric quantity of air, having switchover means associated with an air feed pipe for causing the combustion air to be set into turburlence during starting but allowing the combustion air to flow without turbulence during continuous operation.