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Troubleshooting Tips: Cylindrical Grinding

Problem Cause Correction
Barber Pole Finish Improper lubrication of tableways Adjust the oile flow or change oil
Work loose on centers Be sure the footstock and headstock are properly clamped
Centers do not fit spindles Check centers for fit
Loose fitting footstock spindle Obtain new footstock spindle
Burlap finish Loose diamond tool Keep tool securely fastened
Vibration of diamond tool Damped vibration support
Uneven table traverse when truing Check hydraulic system
Burnt Work or Cracked Surfaces Wheel too hard Try softer wheel or make act softer
Wheel structure too dense Try more open structure wheel
Wrong wheel bond Consult Radiac Application Department
Grinding wheel over speed Reduce speed
Work revolving too slowly Increase work speed
Grinding cut too heavy Rough and finish grind with two wheels
Insufficient coolant Check coolant level, pipes and pumps
Nozzle not directing coolant properly Redirect flow or obtain new nozzle
Wrong Coolant Consult Radiac Applcation Department
Grinding wheel improperly trued Redress wheel
Chatter Marks Grinding cut too heavy Lighter cuts
Wheel too hard Softer wheel, increase work speed, dress coarser, reduce wheel speed, enrich grinding fluid mixture
Wheel out of balance Balance the wheel
Slendor work unsupported Machine Vibration Check for vibration within the machine and for vibration tramsitted to the machine
Diamond Truing lines Diamond too sharp Try a duller diamond
Table traverse fast Slow table speed
Wheel too hard Try softer wheel or make act softer (See #1 above)
Feed Lines Wheel not suitable Change Wheel
Improper control of traverse or work speed when finishing Change work speed or wheel speed when finishing
Improper coolant distribution when truing Readjust coolant flow and direction
Improper use of steadyrests Ensure steadyrests are even
Head or footstock out of alignment Check head and footstock, tableways and center holes.
Long wave marks Out of balance wheel Rebalance wheel
Stopping wheel without turning coolant off, causing unbalanced wheel Rebalance wheel and make it a rule to stop coolant and run wheel until moisture is thrown off
Wheel oil soaked on one side Replace wheel
Allowing wheel to absorb moisture from floor Store in racks off floor
Out-of-Round Work When Plunge Grinding Work piece center holes out of round or not in line Relap center holes
Burrs in work piece center holes Clean holes
Work loose on centers Be sure footstock and headstock are clamped
Centers loose Tighten and clean centers
Center holes do not fit spindles Replace and clean centers
Center goles out-of-round Regrind center holes
Work piece center holes not deep enough Deepen holes or blunt center points slightly
Work centers scored Regrind centers and lubricate
Center points worn down Regrind centers
Work too tight on centers Loosen footstock spring tension
Insufficient coolant Readjust coolant flow
Rough Finish Wheel too coarse or too hard Softer wheel, increase work speed, dress coarser, reduce wheel speed
Diamond too sharp Try dull diamond
Dressing too coarse Slow down dress traverse, lighter dress
Cut too heavy Try lighter side
Traverse too fast Slow down speed
Work speed too fast Decrease work speed
Lack of proper steadyfast Lighter stock removal, softer wheel
Dirty coolant Change coolant
Solution of coolant too weak Adjust concentration
Shadows Grease or oil spots on wheel Redress wheel face
Hard spots in wheel surface Heavily redress wheel or replace wheel
Wheel loading See long wave marks Redress wheel.
Short wave marks Vibration from belts
Vibration transmitted from other machine
Vibrations in hydraulic system
Vibration from motors
All these possible causes are corrected
by repair and/or replacemenmt of machine
Uneven Wheel Surface Rapid diamond wear Change to larger diamond
Improper distribution of coolant Readjust coolant flow and direction
Diamond tool holder not securely clamped Securely fasten holder
Table floating Reduce lubricant flow to table or change to lighter oil