Removing a Burr around a Hole in a Bolt's Threded Section

beat me to it Del... GA

Beat me too.

wire brush or deburring wheel on bench grinder.

sharper drill bits

Depends on quantity of production.

For large scale production whether it is deburring, descaling, polishing, cleaning, or pre-plating Vibratory Finishing Machines are ideal.

Google search should provide ample information.

Dear Sir,

After thread cutting on bolts you may remove burrs by using knife edge filing on same thread lathe machine after that go ahead for wire brushing.

Anil

Use a die nut or thread chaser, these are made for the purpose of cleaning up or reforming threads.

Or drill the hole before threading

Have you considered explosive deburring? Is in routine use in Indian Auto industries.

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Although I have never tried this with metal, putting a temporary medium into the hole after it has been threaded (a tight fit) and then drilling. This is a standard practice in carpentry when one uses a drill press on a piece of wood that they want to have a clean hole on both sides. In this case you would just lay another scrap piece of wood under the wood you are driling, clamp them together and slowly drill, provided the strength and density of the scrap wood under the finished wood was well choosen, you should have as clean a hole if not cleaner on the side the drill pit punches through.

we are re-threading to remove the burr.We want to eliminate that operation using a faster and cheaper method to remove that burr.

You could configure a fixture holding a set of half-nuts which could preform both deburring and drill guide functions. Drill the hole then rotate either a a quarter turn to break/remove the bur.

What about using a drill bit with a slight countersink as part of the bit. That way as the hole is drilled, it will also receive a slight chamfering of the hole. That should clear out any burrs. Same process as you are doing now. The only change is to a different drill bit. Good luck.

Use De-burring machine as per your application, u may discuss the matter with the manufacturer of de-burring machines for some arrangement of spray gun that will throw the compounded material with a reasonable force or arrange some kind of thread coated with glass powder and run it through the whole if you still unable to do this then let me know about the material of screw u r using......

check your feed rate and tool type of your machining process..

regulating the machining process can help improve surface finish.. as burr is a surface finish problem..

another way is to rub abraisive emery sheets over the finished component to improve surface finish and remove burrs.. this method is very easy and practical.. this is only possible in a manned process and not in a automated process..

also consider proper coolant supply, as improper machining tamperatures may cause tool welding and result in burr formation..