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Lapmaster Model 56 Pneumatic Lift 4 Ring

The Lapmaster Model 56 is equipped with a 56 inch (1422mm) diameter lap plate. This is manufactured from Grade 300 grey cast iron to ISO 185(2005). It consists of individual segments bolted to a support plate. Pressure weights are attached through self-aligning bearings to the rods of the pneumatic cylinders. The cylinders are mounted on a framework located over the lap plate on two upright columns. The primary function of the pneumatic arrangement is to permit loading and unloading to be carried out without the need to lift pressure weights manually. However, they can be used to supply additional loading to the components within the conditioning ring should this be required. The machine is intended for use with free abrasive compounds. A dispensing system, for use with water and diamond compounds etc., can also be fitted. Operator safety is a primary concern in the design. Movement of each pressure weight up or down is controlled by a two hand anti tie down control box. This arrangement requires the use of both hands on two separate buttons to function and ensures the operator cannot injure their hands or arms when lowering the weights. A further safety feature is that the pressure weights are locked in any position, so that should the air or electrical supplies fail, the weights will not fall. Flatness of the machines lap plate, and consequently of the work, is controlled by adjusting the position of the conditioning rings relative to the lap plate track. The lapping plate drive system uses a separate motor and worm & wheel mechanical reduction gearbox with multi-belt drive.