Page 25 - Bullard Abrasives Product Catalog 2020

FREQUENTLY ASKED QUESTIONS
What is causing material from the work piece to become present on the contact surface of an abrasive wheel? How can I correct this problem?
This is referred to as Wheel Loading The cause is from using the incorrect wheel specification - too fine grain To correct this problem, change wheel specification to a course grit or a more open structure to allow clearance of chips
What is causing Wheel Glazing? What is the solution to this problem?
Glazing is when exposed grain becomes dull and does not let new sharp grains become exposed The cause is using the incorrect wheel and/or faulty operation The solution is to use coarser grit size - Soft bond for hard material - hard bond for softer material
What is causing the wheel to break?
Irregular Wheel Breakage is caused by the wheel being damaged in handling or the wheel is jamming Chordal Wheel Breakage
is caused by too much side load pressure and Radial Wheel Breakage (3 or more pieces) is caused by too much
wheel pressure on work surface Causes could also include wheel jams in work surface, improper wheel mounting or wheel speed is too high
WARNING: Stop all operations Take time to solve
the problem If unable to solve the problem, call your local sales representative
Why 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;
use coarser grit, use softer, thinner wheel or check machine spindle and wheel run out
What causes the work piece to burn?
The wheel is too hard or coarse and/or insufficient feed rate can cause 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 remove residue
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
BULLARD ABRASIVES | FREQUENTLY ASKED QUESTIONS | 25