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Can't remove tapping burrs

I am a facing problem with tapping burrs which could not be solved by using a tumbling or chemical polishing process. The thread hole is Diameter 1mm - 1.04mm, the tapper is Diameter 1.2mm with 0.2 pitch. After tapping process, found burr where same as the thread line but it cannot be tumbled because no such small media I could find; while chemical polishing also could not remove it.

I know that my process got error but I could not detect it. Is here anyone face the same probem before? Please help me...

Vivien
Metal Machining - Malaysia
2005

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2005

There is media as small as and smaller than 1mm. It is expensive, but it is available. We use to stock some, but due to volume and selling cost, it was not popular. We can still get it, but there are minimum orders of 1000#'s. Lastly, we maybe able to use a angle cut 2mm triangle to work ID if it is only the outer thread.

AF Kenton
retired business owner - Hatboro, Pennsylvania

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Not being able to see the part makes it a bit difficult and not knowing how many holes there are also makes it difficult.
One thing that might work is a narrow orifice jet of high pressure air or water. NOTE! this requires safety equipment to protect the operator and any body that might be within say 25 feet. I do not like to, but it has worked on some parts and not on others. Might be worth a try if all else fails. I suspect that you will have media trapped in the holes if you do get some of the referenced media.

James Watts
- Navarre, Florida
2005

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2005

Hi

The best solution is to avoid the burrs.I have some suggestions .
1. Use the correct size drills
2. Use a small chamfer at the start and end ( depends on the thickness)
3. Use flutless tap for tapping purpose.

Jagathees
- Kuwait