Cutting spiral with grinder and leaving sharp burrs

Confirm the round/spiral/oval fitting and connection before forcing or cutting: cutting spiral with grinder and leaving sharp burrs.

Make the cut clean before assembly. Crooked cuts and burrs fight the connection and leave sharp edges.

Round, Spiral & Oval Duct 2nd Year YELLOW

Stop if

Ask when finish/exposed spiral, connection type, seal method, support, or fitting orientation is unclear.

Watch out

Do not leave sharp spiral burrs or a crooked edge inside the joint.

Check

Cut square
Deburr
Test fit before fastening

Steps

Verify size, fitting type, and airflow/branch direction.
Check the connection method: coupling, collar, flange, gasket, screws, or sealant.
Support the duct so weight is not deforming the joint.
Focus on the actual issue: cutting spiral with grinder and leaving sharp burrs.
Photograph or mark the condition if someone else needs to approve it.

Say this to your foreman

In Spiral, Round & Oval Duct Install, I'm looking at: Cutting spiral with grinder and leaving sharp burrs. What should I verify before I cut, drill, seal, cover, move, or install?