Deburring

2.2 Manual deburring (using hand tools or power tools)

2.3 Vibratory Deburring (Rumbling/Tumbling)

1. Deburring Expectations

When deburring has been requested as a process we would require all edges to be rounded to R 0.2mm minimum. There should be no sharp edges present on the parts provided, and the deburred edge should be perfectly safe to run your finger across without risk of injury. The method of deburring is at the manufacturers discretion, however the outcome needs to be a minimum R 0.2mm edge, this includes any cut holes.

Unless otherwise specified we would accept parts that have been deburred using any of the methods described below. We understand that different deburring methods may affect the overall surface finish of one or both sides of the part. Therefore we have included images to show examples based on a class B finish as defined on the General Appearance Classifications page.

We understand that in some cases for laser cut or waterjet cut parts only one side might need deburring as the top side might already meet the R 0.2mm requirement.

2. Acceptable Deburring Methods

2.1 Deburring machine or Timesaver

The flat cut part is passed through a machine with abrasive brushes that pass over the surface of the material, cleaning the surface and removing sharp edges. Some timesavers give a linear brushed finish and others give a circular or orbital brushed finish. If only one side of the material needs to be deburred, this finish will only apply to one side and the other side will have a mill finish. Otherwise, both sides of the material will have this finish.

Rotary Timesaver

Linear Timesaver

Opposite side if only one side has been processed

2.2 Manual deburring (using hand tools or power tools)

Manual deburring can be carried out using hand tools such as a burr knife (softer materials) or hand file (harder materials) or power tools such as an angle grinder. This deburring method should be carried out only on the material edge without affecting the surfaces on either side. There should be no sign of chatter or chipping on the edges that have been deburred and the visible effect of this method should not detract from the overall look of the part. See images below for acceptable and unacceptable examples using a manual deburring method on a Class B finish.

Acceptable Class B finish

Not acceptable Class B finish

2.3 Vibratory Deburring (Rumbling/Tumbling)

This method involves placing the metal parts in a rotary drum along with some abrasive media and a liquid compound the drum is then set in motion causing the media to rub against the parts and round off any sharp edges. the final finish can be adjusted depending on the size and type of media used and the speed at which the drum rotates. This method gives a smooth consistent finish on both sides of the parts

Side 1

Side 2

2.4 Media Blasting

Media blasting involves blasting the surface with an abrasive media such as glass beads, sand, steel grit / shot. this process is mainly used to clean up surfaces or apply texture ready for a surface coating finish such as powder coating, painting or anodising. However in some cases it can also be used to remove burrs from parts. The surface finish after media blasting should be a consistent textured finish all over the part similar to the images below.

Side 1

Side 2

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