Deburing holes

[I.M. OUTAHEREParticipant @i-m-outahere]

IIRC i have used it down to 2 – 2.5 mm , there are some small tips in the set and the cone shaped windy windy deburring tool – that is magic on holes up to around 3/8 . It also has a small triangle scraper that you could stick the point in a small hole and give it a twirl . For really small holes i use the point of a flash hole deburring tool made by redding, it is just a very small centre drill in a holder that plugs into handle . Not 100% sure but i think the tip of the centre drill is somewhere around 60 thou .

[I.M. OUTAHEREParticipant @i-m-outahere]

The tip of the centre drill is 80 thou .

Here i drilled four holes , two at 1mm and the other two at 2mm

The top set were done with the centre drill the others with the tool at the bottom ( windy windy thingy ) the tip mounted in the handle fits inside the 2mm hole – just and the top tool is the triangle scraper which is around 2mm across the flats .

Results are the bottom picture .

[Michael GilliganParticipant @michaelgilligan61133]

Posted by XD 351 on 06/11/2018 05:38:34:

The tip of the centre drill is 80 thou .

Here i drilled four holes , two at 1mm and the other two at 2mm

The top set were done with the centre drill the others with the tool at the bottom ( windy windy thingy ) the tip mounted in the handle fits inside the 2mm hole – just …

.

Many thanks for taking the trouble to show that detail

My deburring tools [non Noga] have rounded ends and only swivel to keep the scraping edge aligned.

MichaelG.

Edited By Michael Gilligan on 06/11/2018 06:39:10

[Howard LewisParticipant @howardlewis46836]

Some deburring tools have an additional cutting tool which is intended for deburring the "far" side of a hole, so may be effective for deburring the hole on the inside of a tube.

If you skim the inside of a tube, Sod's law says that you will throw a burr into the cross drilled hole. You never win 'em all.

Howard

[Eddy CurrParticipant @eddycurr38053]

Posted by Howard Lewis on 06/11/2018 17:24:35:

Some deburring tools have an additional cutting tool which is intended for deburring the "far" side of a hole,

The "Burraway" mechanical deburring tools produced by Cogsdill are an example. I have their Type A in 5/32 and 3/16 versions.

@Vic (OP)

Which of the suggestions posted so far seem most suitable to your intended purpose of deburring cross-drilled holes in rounds.

Also. I do not recall seeing you reply to the question someone asked inquiring as to the dia of the material and cross-hole.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Eddy Curr on 12/11/2018 01:30:32:

…

@Vic (OP)

Which of the suggestions posted so far seem most suitable to your intended purpose of deburring cross-drilled holes in rounds.

Also. I do not recall seeing you reply to the question someone asked inquiring as to the dia of the material and cross-hole.

.

Thanks for re-focusing the discussion, Eddy

Although many of the replies have been interesting, few seem to have addressed the issue of de-burring a drilled hole on a curved surface.

MichaelG.

[John ReeseParticipant @johnreese12848]

Posted by ega on 19/10/2018 11:54:06:

The book advice for threaded holes is to countersink before threading; I admit I often forget and have to put up with the result.

That is the way I prefer to do it.

[VicParticipant @vic]

The bar diameter varies from about 12 – 25 mm. For my immediate purposes I’ve managed to get a centre drill with a 5mm tip so this will be perfect for tapped M6 holes. The Noga set looks good but I can’t justify the price. I should perhaps look into a single tool from Noga that might suffice. I’ll see if I can find a product catalogue or videos. Thanks all.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Vic on 12/11/2018 09:35:19:

The Noga set looks good but I can’t justify the price. I should perhaps look into a single tool from Noga that might suffice. I’ll see if I can find a product catalogue

.

Thanks for the update, Vic … Glad you found a suitable countersink

Meanwhile, for the attention of Santa:

**LINK**

http://www.noga.com/Products/deb/Deburring%20System

MichaelG.

[egaParticipant @ega]

Thanks for the noga link.

I see that the reversible tool is not only recommended for diametral holes in pipe but will deburr the other side of the hole, too!

[Chris TriceParticipant @christrice43267]

Posted by Tony Pratt 1 on 18/10/2018 10:23:04:

Spot drill, drill, countersink & tap. having an uneven chamfer was never a problem in my machining days. Better on a mill if you have one to keep location constant.

Tony

What Tony said. If your countersink is wandering AFTER you drill the hole, your set up isn't rigid enough or your countersink is not very good quality. If you're using one of the countersink types with a round hole running through it at 45 degrees, it's the equivalent of a single sided cutter and these like rigid set ups. Better to get a three flute type as they have more of a tendency to stay on line particularly if countersinking hand held.

[VicParticipant @vic]

Thanks for the link Michael, I’ll have a read when I get a minute.

[JonParticipant @jon]

I usually dont bother deburing cross or end drilled and tapped holes. Why because the part needs finishing where any burrs will be removed.

Have a Noga deburrer i never use it, far quicker and better results obtained with a knife. One particular product i make has 78 debur holes a Noga wont touch r make it extremely difficult having tried it amounts to 1 1/2hrs versus knife done and dusted 6 mins.

[Sam StonesParticipant @samstones42903]

From years allied to the plastics industry, one of the odd things about deburring some materials like plastics, is the need to apply a negative rake instead of using a cutting (knifing) action.

In other words, incline the (knife) blade opposite to the normal cutting angle. Applied with some speed, it can prove to be the most effective.

Sam

 

Edited By Sam Stones on 13/11/2018 03:15:02

[Eddy CurrParticipant @eddycurr38053]

Posted by Vic on 18/10/2018 09:27:32:

I often seem to need to drill holes or drill and tap along a round bar or thick tube, what’s the best way of deburing the hole to get the best appearance? …

I’m using M6 most recently. TIA.

Posted by Vic on 12/11/2018 09:35:19:

The bar diameter varies from about 12 – 25 mm. For my immediate purposes I’ve managed to get a centre drill with a 5mm tip so this will be perfect for tapped M6 holes. The Noga set looks good but I can’t justify the price. I should perhaps look into a single tool from Noga that might suffice.

What kind of volume/frequency are you looking at? How steady are your hands and how is your vision?

An approach for Cross Hole Deburring (hint: search topic) that seems to be common amongst the CNC Automation crowd is the use of a ball-shaped burr or lollipop cutter.

XEBEC Cross-hole Debur (How the CNC guys do it)
https://m.youtube.com/watch?v=55xCGNKxiTQ

If inclined, that approach could be mimicked manually with a Dremel or similar tool. Dremel offers 1/8" Round Carbide Cutters, as well as 1/4 × 3/16 Carbide Cutters in single and double cut. Other vendors will have different options to choose from. You might persuade your dentist to save cast-offs in smaller sizes.

Orbitool in a cordless handheld grinder https://m.youtube.com/watch?v=U6TIqlekuRU

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