Body Buckling
Visual Double Seam Defects - Cause & Remedy

Body Buckling can occur anywhere up and down the can body depending on tin plate weight or material. This usually occurs just under the finished seam and looks as though it was pushed in buckled and twisted.

Body Buckling Body Buckling 
Probable Cause Suggested Remedy
2nd Operation Seaming Roll set too low in relation with the Seaming Chuck flange Adjust 2nd Operation Seaming Rolls to .006 of an inch between the Seaming Chuck flange and Seaming Roll profile at its inward most travel.
1st and/or 2nd Operation rolls set too tight See Parts List Instructions or Service Manual for this procedure
1st Operation Seaming Roll set too high in relation with the Seaming Chuck Flange Adjust 1st Operation Seaming Rolls to .003 of an inch between the Seaming Chuck flange and Seaming Roll profile at its inward most travel
Lower Lip of 1st and/or 2nd Operation Seaming roll is coming in contact with the can body Reduce lip diameter or replace with Seaming Rolls with Rolls that have a more shallow groove profile
Lower Chuck Spring pressure too high or broken spring Adjust to reduce Spring pressure or if broken, replace the spring. If spring pressure is the cause for Body Buckling, it will appear at the thinest and weakest point of the can body.
On 60L seamers, Lower Chuck Bearings not turning freely Check lubrication in the bearings. Clean out and check bearing wear. Replace if necessary. (60L only)
Pin Gauge Height set too low for the finished seamed can height being used. See the Dead Head or Skidder defects or Pin Gauge Height formula