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Wonkee Donkee’s top tips for deburring

Shop for Deburring Tools

When deburring, here are a few things to bear in mind:

Use the correct cutting speed

Chatter marks appear as waves on the material surface When selecting the cutting speed, slower is better. This prevents chattering of the tool which can result in chatter marks being left on the cut surface.
Burr height is influenced by the cutting speed, the slower the speed the less burs will be produced. Using a slower speed will also reduce the height of the burrs produced in the machining (e.g. drilling, turning, cutting) process.

Use the correct feed rate

A snail's pace will produce better results When selecting the feed rate, choose a slower one as the quicker the feed rate, the faster the tool will wear out.

Even though deburring cutters are made from HSS, they can’t be used at record breaking speed!

Apply a lubricant

When deburring use a cutting fluid or lubricant, this helps to reduce the possibility of chatter occuring When deburring, use a cutting fluid or lubricant. This will help to reduce heat and resistance between the cutter and the material, which can cause chattering of the tool.

Use a hardened tip for hardened metals

Cobalt tipped countersink Avoid using HSS deburring tools on hardened metals (stainless steel and tool steel), as the cutting edge will wear away quickly, and a high quality finish will not be achieved.

If you need to deburr a hardened metal, look for tools with cobalt or tungsten hardened tips. Cobalt is more heat-resistant and is good for machining stainless steel and cast iron, whereas tungsten can be used with any material.

The disadvantage of both of these hardened tips is they can become much more brittle and are more expensive.

This type of tool is not designed for deburring. Becuase they are expensive to purchase and are designed for countersinking hardened metals, that HSS wouldn't be able to machine.

Choose a pilot guide for highly accurate applications

Pilot deburring cutter (zero fluted countersink) **** Googled image If the chamfer on the machined hole needs to be highly accurate, consider using a piloted deburrer. This deburrer has an extra piece on the tip, which guides the tool bit into place, centring it in the machined hole.