Before troubleshooting your shear double check the manual to ensure proper assembly and operation procedures have been followed, that your tool is properly lubricated, and that the blade has been properly honed as recommended. Visually inspect shear, watching for objects that might obstruct the blade or powerhead travel, foreign material presence between the blade and anvil, and in the pin springs or under the cam. Check your blade for chips, cracks or burrs, and make sure bearings are intact and lubricated with no play on cam.
Problem Check first Check second Check third Check Fourth Difficulty cutting Ensure cam lock is OFF.
If equipped, engage power lobes (Model 226)
Make sure handle is FULLY extended Check blade sharpness / condition Inspect and lubricate bearings / pins Not cutting completely through material Inspect pins for oblong / wallowed orifice Adjust front stroke stop (magnum shears) Check bearings for wear / play Ensure blade is proper nominal height Blade sticking after completing cuts Check /remove & replace blade stops if damaged Ensure blade screws are tight Remove anvil, turn it over, reinstall Check for marks on anvil (overbite) Rough or crushed cuts Check veneer thickness (max= 1/16 ") Check blade condition (chips, burrs, breaks) Ensure blade is honed and sharp Review approved materials list Cuts aren't square Loosen fence screws, align fence, tighten Check pins for uneven wear Inspect blade and anvil for contact Handle not returning to open position Ensure pins are lubricated Apply grease to contact area of bearing Lubricate axle bolts Check springs for breakage Material won't fit into cut area Check max thickness of material for your shear. Reverse back stroke stop Ensure blade is proper nominal height If you have two bearings, switch which bearing is engaged. Cam lock pin bent/stuck Do not lift or carry shear by the handle Return handle slowly to open position - do not "let it fly" Disengage cam lock pin BEFORE cutting Blade chipping Hone as directed in manual (~25 cuts, then daily) Do not cut stranded bamboo Do not cut high pressure laminate Check veneer thickness (max= 1/16 ") Pin openings wallowed out / oblong where cam axle passes through Do not lift or carry shear by the handle Return handle slowly to open position - do not "let it fly" Check veneer thickness (max= 1/16 ") Review approved materials list Not cutting to edge of material Check fence alignment - adjust if needed Do not "angle" material beyond the blade edge Ensure angle fence(s) are installed with WIDE edge inward (620 model)