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		Video 265k ADSL
The roughening methods that we use: On continuous floors: Grit blasting (possibly wet), with broken blast-furnace slag, glass beads, aluminium oxide, etc. Shot-blasting, with steel shot or broken steel shot. Flame annealing, with an acetylene burner or hot-air lance Strip milling, with carbide or metal mills Bush hammering, with lightly hammering bits On grating floors: Strip milling, with carbide or metal cutters Grit blasting (possibly wet), with broken blast-furnace slag, glass beads, aluminium oxide, etc. Milling with a diamond mill Because the edges of the grating beams break off if a strip mill is used for roughening, we started to use a narrow mill to only roughen the middle of the beam.The disadvantage of this, however, is that production capacity is low, which results in a high price. Furthermore, urine remains on the surface because a channel is created in the middle of the beam. Because of this we started to grit-blast the grating beams. We also encountered a number of problems here : grit-blasting causes considerable dust, grit is left in the slurry store and on the trusses, grit blasting makes an annoying noise, the depth of the texture is uneven and urine remains on the surface because of the pits that are made. NONE OF THESE DISADVANTAGES OCCUR WHEN THE NEW DIAMOND MILL IS USED.		Video 265k ADSL
	Machine: The milling machine is 600 mm wide, 1200 mm long and 1000 mm high. It weighs 400 kg. The diamond mill itself is 250 mm wide. The working speed can be continuously adjusted because of the hydrostatic drive. Treatment: Transversely to the grating beams, therefore in the longitudinal direction of the gangways, grooves are be milled from 0 - 2 mm deep, 3,5 mm wide and with 2,5 mm between the grooves. The result of the treatment is a corduroy effect. Even if the grating floor is not very flat, it is possible to treat the majority of the grating beams with this diamond mill. This machine can be used on more or less all of the floor area on which the cows can walk.