Centerless grinders are the dependable workhorses of the manufacturing world. With regular maintenance and TLC, your centerless grinding machine will produce zillions of parts with nary a hiccup. But when your Triple Crown-winning grinder suddenly develops a limp, as shown by parts coming off the machine, you’ll want to be savvy enough to have a potential diagnosis before you report the problem to your all-knowing boss. Here’s one big hint: Centerless grinding machine problems are generally related to the grinder’s tooling. You’d be wise to focus on that aspect when troubleshooting your machine. Below are some common grinding machine problems, their causes, and clues to possible solutions.
Centerless Grinding Machine Error #1: Burn marks on the workpiece
1. Insufficient coolant
2. Wheel too hard
3. Too heavy stock removal
Centerless Grinding Machine Error #2: Chatter
1. Blade not properly clamped
2. Outside “floor harmonics”
3. Wheel out of balance
Centerless Grinding Machine Error #3: Erratic sizing
1. Gibs not properly adjusted on upper and lower slides
2. Soft wheel
3. Work improperly rough ground
Centerless Grinding Machine Problem #4: Feed lines
1. Grinding wheel not relieved on exit side
2. Work guides not properly set
3. On long bar fixtures – excessive pressure on workpiece by roller hold-down
Centerless Grinding Machine Problem #5: Finish
1. Incorrect set-up
2. Dirty or insufficient coolant
3. Oil on face of wheel
Read our April blog to learn more about potential centerless grinding errors and diagnoses.
TGS offers a team of centerless grinding experts with more than 150 years of combined experience who can work with you to solve any of your grinding issues. For assistance with your grinder, contact TGS.