• Amolik Precision Machines

Double disc grinders

Amolik Precision Machines, based in Mumbai, manufactures double disc grinders that have been developed to grind, two parallel flat surfaces with the help of two grinding wheel faces, opposed to each other. The work piece is advance between the wheels by various methods such as free floating or clamped, depending on the shapes, sizes, quantities as well as the stock removals required. This machine features welded and stress relieved silicon steel base with cross ribbings to provide a balanced compensation for thermal expansions. Rigid construction absorbs vibrations. The base is precision machined in a single setting to achieve necessary accuracies. Spindle shafts are heat treated for toughness. Dynamically balanced and ground spindle shafts ensure distortion-free operations and over prolonged usage. These hollow spindle shafts have a rotary joint to allow coolant flow to the centre of grinding wheels, for efficient cooling of wheels and work pieces. Shafts are housed in a robust steel housing and mounted on pre-loaded high precision angular contact ball bearings, which are lubricated for life. Both vertically and horizontally adjustable spindle bushings allow the spindles to be swivelled according to the need. Rigid, ground and nitrided lead screws driven by a worm wheel ensure rapid and precise micro displacements of the spindles. These are operated by variable speed drive motors or manually. Dressing device is rigidly mounted on precision ground mating surfaces. The dresser coupled to a variable speed reversible motor and limit switches provides a rigid-arm motion for chatter-free dressing of individual, or both wheels, simultaneously. A robust compartment enclosing the grinding wheels guards the machine and the operator against the unlikely event of wheel breakage or disengagement. Spindles are provided with precision flanges to accommodate nut-inserted grinding wheels. Technical specifications Model: DDG-300 and DDG-300 HD Grinding wheel diameter (mm): 300 Power per spindle (kw): 7 (DDG-300) and 12 (DDG-300 HD) Spindle stroke (mm): 70 Weight (kg): 2000 (DDG-300) and 2500 (DDG-300 HD) approximately Grinding ranges thickness (mm): 0.8-20 Grinding ranges diameter/L (mm): 5-25 (DDG-300) and 5-40 (DDG-300 HD) Optional features: Wheel-wear indication Wheel-wear compensation Pre process/post process measurement of work pieces Electronic variable speed drives Digital Readout (DRO) for micro feeding of spindles in accuracies of 1, 5 or 10 microns Hydraulic wheel dressing Hydraulic safety guard lifter Magnetic separator and 5-micron filter element system Automatic loading and unloading devices Advantages: High production rate, high parallelism, heavy stock removals, close tolerances, better surface finish, easy accessibility, low operating costs, facilitates easy automation, suitable for ferrous and non-ferrous materials, thin components can be ground without damaging them, and gradual stock removal throughout the work path, across the grinding wheels, permits heavy stock removal, in a single pass.