surfaces be warned... - Bullard Abrasives

trouble shootingFrequently Asked QuestionsWhat is causing material from the work piece to become present on the contactsurface of an abrasive wheel? How can I correct this problem?This is referred to as Wheel Loading. The cause is from using the incorrect wheelspecification - too fine grain. To correct this problem, change wheel specificationto a course grit or a more open structure to allow clearance of chips.EELLIGHTNINGWhat is causing Wheel Glazing? What is the solution to this problem?Glazing is when exposed grain becomes dull and does not let new sharpgrains become exposed. The cause is using the incorrect wheel and/orfaulty operation. The solution is to use coarser grit size - Soft bond forhard material - hard bond for softer material.What is causing the wheel to break?Irregular Wheel Breakage is caused by the wheel being damaged inhandling or the wheel is jamming. Chordal Wheel Breakage is causedby too much side load pressure and Radial Wheel Breakage (3 or morepieces) is caused by too much wheel pressure on work surface.Causes could also include wheel jams in work surface, improperwheel mounting or wheel speed is too high.WARNING: Stop all operations. Take time to solve theproblem. If unable to solve the problem, call your local salesrepresentative.MAX RPM4,36670030Why is the wheel cutting slowly?Slow Cut Rate can be caused by the following reasons:Not enough power; Contact area too large; Grit too fine;Wheel too hard; or, not running true. Solutions can include:Increase pressure on feed rate; reduce contact area; usecoarser grit, use softer, thinner wheel or check machine spindleand wheel run out.2PMx 1SPECC20RMADE IN THEUNITED STATESWhat causes the work piece to burn?The wheel is too hard or coarse and/or insufficient feed rate cancause the work piece to burn. Try using finer grit and more power,try working machine at maximum power or go to softer grade wheel.Why is the wheel not cutting square cuts and how do I resolve this issue?Reasons for non-square cuts could be that the work is not properly secured,worn spindle bearings or the wheel is too hard. Check clamps and removeresidue from cuts. Check spindle and alignment and/or try a softer wheel.Why does the wheel have a short wheel life?If your wheel has a short life, the wheel is too soft. Use harder bond.16