Used Machines Vices for Sale — 191

A machine vice is a universal clamping tool used to manually clamp individual workpieces to a work table or a machine. The vice contains two clamping jaws, one of which is mobile. However, with some special designs, both can be mobile. They move together with a threaded spindle, whose threads have a trapezoidal profile. This reduces friction, which can often occur when using V-shaped threads e.g. for fastening bolts. When using them on machine tools, vices usually have a range of clamping possibilities such as slotted holes, longitudinal or cross grooves, or dovetail mounts. They also contain a base plate with a large surface area that can provide a reliable plane, which is parallel to the work table.

Machine vices are significantly flatter than those used for handiwork production. Machine vices have a square or hexagonal bar instead of a fixed crank, used to drive the threaded spindle. This, depending on its position, protrudes into the workspace. A quick adjustment mechanism for the clamping jaw is a common feature of a machine vice, and it significantly reduces the clamping time. For the interchangeability of machine vices and their usability on different machine tools, the DIN 6370 specifies the dimensions of the connections, clamping jaw ranges and the configuration of the clamping jaws with tolerable variations.

Areas of Application and Examples of Machine Vices

Machine vices are used on different kinds of machine tools that undertake various processes. The amount of stress inflicted upon the vice during the processing of a workpiece can vary greatly. During conventional milling processes, the force fed from the tool into the workpiece lifts the workpiece off the surface. This force has to be absorbed by the vice. However, if these are milled in unison, then the components of the workpiece will press against the surface. Helical milling cutters produce another type of force, which acts at an angle against the direction of the feed.

The power required for drilling, as well as sinking and reaming, is much more complex. First of all, the power of the feed moves in the direction of the tool's axis. When using a common workshop drilling machine with a vertical spindle, the workpiece is pressed against the table. Through its rotational movement, the tool additionally guides torque into the workpiece using a spiral-formed cut. When drilling workpieces with rotational symmetry, this torque moves in the direction of the workpiece axis, solely as a result of the frictional force between the clamping jaw and the workpiece. The coiled shaped cut created by the drill produces a level of power that works against that of the feed.

This is most relevant for through boring, which is when the drill breaks through the surface of the workpiece’s far side and the pressure of the feed dissipates. Force against the feed direction can occur when material residue within the drilled hole’s diameter has not yet been processed. This needs to be noted when attaching the vice onto the machine tool.

There are two basic forms of machine vices available for universal use. When using simple machines vices with counter pressure, the threaded spindle pushes a moveable clamping jaw against another. These are fixed to one another with a base plate. This creates a C formed power flow, which means the base plate ends up bending. This stress does not impact a machine vice under tensile stress, which ensures that it remains flat. In this situation, the moveable jaw is a U shape, and is pulled towards the fixed jaw using a spindle, which is located between the two axes of the mobile components.

Workpieces with rotational symmetry can be clamped into special types of machine vices and then centred. These special forms of vices contain two mobile clamping jaws. Both sit on the same spindle. One is controlled with the left-handed thread and the other with the right-handed thread. The jaws are synchronised in their movements, but also move against each other and always stay centred in relation to the base plate. They contain wedge shaped bearing areas, which means a workpiece with a cylindrical cross section can be vertically centred.

There is another special type of machine vice, which is used for grinding processes. This vice can move horizontally and vertically. It is mounted on a support plate that is attached onto the grinding machine. The mobile clamping jaw contains a slanted surface area, which guides the component in the direction of the base plate when it is clamped in. This also prevents the workpiece being lifted by the tool.

Vices for automatic machine tools, like processing centres, are suited for a high level of repeated accuracy and exactitude. This means that their base and front sides are ground and they have fixing holes. The adjustable clamping jaw contains elements to ensure exact positioning. High-end machine vices are also produced using complex mechanic-hydraulic motors. The vice has a mechanical motor, which is replaced by a hydraulic, pneumatic or electrical power generation over a threaded spindle. Due to the fact that the threaded spindle operates differently, this is not a vice in the original sense. However, the term “vice” is also used to describe this clamping device, because it undertakes the same task and only differs in terms of how the clamping power is generated.

Buy Used Machine Vices for Sale 

If you are looking for a milling vice for sale anywhere in the world, TradeMachines will be able to supply the machinery that you require. Machine vices are a vital part of many manufacturing processes, from furniture production to metal working and plastics manufacturing, and we feature milling vice auctions that can deal with a huge range of industrial situations. Choose from a basic machine vice for sale, or more complex CNC machining centres with sophisticated wireless enabled terminals. Choose the number of axes that you require, including 3, 4 and 5 axis machine vices, and as soon as the auction is concluded, your drill press milling vice for sale will be delivered in no time. If you need a specific brand of milling vice for sale, we will link you to an auction taking place right now, so that you can make the purchase as quick as possible. Along with milling vice auctions, we feature auctions of the whole range of industrial machinery. From grinders and milling machines to industrial vehicles, conveyor belts and cooling plants - TradeMachines will have the equipment that you need.

Machine Vice Manufacturers

Machine vices are produced by machine tool manufacturers like ALLMATIC, AWM, BEMATO, HILMA RÖMHELD, OPTIMUM, RÖHM, TOOLPOWER, UBK and UWM.