Making a 2.5mm Hole in Thick Metal: Drill vs Hole Saw, DIY Methods and Techniques

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#31 15705141 28 May 2016 19:08

Krzysztof Kamienski Krzysztof Kamienski

Level 43

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Post #31
15705141 28 May 2016 19:08

czaplak11 wrote:
Try to drill at maximum speed and
At this diameter, at maximum speed ?? Please, Dear Colleague ...... :cry:

Added after 5 [minutes]:

Gentlemen, gentlemen ... There are special holesaws with a dozen or so carbide blades around the circumference and a pilot drill bit in the center. Sometimes I use them myself. Idle, not too much pressure and cool. A bit tedious, but in the case of a colleague, you can drill a hole with such a hole saw on a table drill.
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#32 15705191 28 May 2016 19:28

jalop jalop

Level 24

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Post #32
15705191 28 May 2016 19:28

Krzysztof Kamienski wrote:

czaplak11 wrote:
Try to drill at maximum speed and
At this diameter, at maximum speed ?? Please, Dear Colleague ...... :cry:

Added after 5 [minutes]:

Gentlemen, gentlemen ... There are special holesaws with a dozen or so carbide blades around the circumference and a pilot drill bit in the center. Sometimes I use them myself. Idle, not too much pressure and cool. A bit tedious, but in the case of a colleague, you can drill a hole with such a hole saw on a table drill.

There are also such holesaws, only slow speed and cooling, although my friend asks:

Quote:
I have to drill 10 holes from fi 16 to at least fi 20. These holes are in the frame of the combine and I have to do it to adjust the reduction gear slightly. This frame cannot be unscrewed to use a bench drill.

The bench drill comes off. I think that it will be better for him to drill and enlarge with a rotary file, although if the material is soft, then maybe a lace can do it.
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#33 15705229 28 May 2016 19:42

Krzysztof Kamienski Krzysztof Kamienski

Level 43

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Post #33
15705229 28 May 2016 19:42

Well, Koleżka will do the holesaws, in fact. Cyba, however, firing and processing with a hand grinder for holes.
#34 15705293 28 May 2016 20:07

Anonymous Anonymous

Anonymous

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Post #34
15705293 28 May 2016 20:07

ursus1991 wrote:
Thanks. I bought a rotary file today and ream it with a drill. I tried today and it's going pretty well.
Gentlemen, you read this thread at all or just write what you want ... The inquirer has probably done a job long ago, which with such a file with such a soft material goes like butter, he will process one 'hole' in 10-15 minutes and after the trouble, without borrowing any drills magnetic.

And show me a picture of a ?20mm hole saw with a ?16mm pilot drill. At most, you can look for a face countersink with the same diameters as the NWCe 20, but before he gets it, he will use a file for 4 times less money to work 100 holes ... Besides, he will not drive it with an ordinary 3000rpm drill like a file.
#35 15705539 28 May 2016 21:42

marcin55246 marcin55246

Level 25

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Post #35
15705539 28 May 2016 21:42

hephaestus wrote:
Gentlemen, you read this thread at all or just write what you want ...

A colleague already wrote in the comment # 25 how to do it correctly, and here it is a storm.
Ordinary drill fi20, regular drill, idle and driving indicated. You don't even need a coolant, as you do with your head.

hephaestus wrote:
And show me a picture of a ?20mm hole saw with a ?16mm pilot drill.
It doesn't really exist. They probably meant the fi20 drill with a fi16 remote control. Anyway, and such unnecessary, it is only 2mm / page.
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#36 15709912 30 May 2016 20:25

ursus1991 ursus1991

Level 10

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Post #36
15709912 30 May 2016 20:25

Cylindrical with a diameter of 10 mm. I don't remember what company, but there was no choice. And it was so hard to find
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#37 15709963 30 May 2016 20:42

vodiczka vodiczka

Level 43

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Post #37
15709963 30 May 2016 20:42

13adam13 wrote:
I will try it myself, do it yet I do not know how, please do not close the topic in a week, I will praise what came out.
Over a year has passed and the author is still looking for a way?
#38 15710030 30 May 2016 20:59

robokop robokop

VIP Meritorious for electroda.pl

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Post #38
15710030 30 May 2016 20:59

Yes, I read it and I do not believe ... The holes fi20, in inch steel I drill with an old Elprom drill, probably - a drill bit shank at 16mm to catch the head. Turns around 300-450rpm, pouring water so that the drill does not burn.
#39 15712087 31 May 2016 19:26

13adam13 13adam13

Level 29

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Post #39
15712087 31 May 2016 19:26

vodiczka I solved this problem a long time ago without drilling, I burned the holes with a welding machine, I did not close the topic because someone else was also looking for help. I think he has already found it, so the topic has been resolved and I close it.
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Topic summary

The discussion revolves around drilling a 2.5mm hole in thick iron (2cm) without access to a bench drill. Various methods are suggested, including using a titanium drill bit at low speed with cooling, and the possibility of using a metal hole saw. Participants emphasize the importance of using the right tools, such as a hand drill or a magnetic drill for precision. Techniques include starting with smaller drill bits to gradually increase the hole size, and using a rotary file for finishing. Some suggest burning the hole with a welder as an alternative, though this may compromise precision. The conversation highlights the need for proper lubrication and cooling during the drilling process to prevent tool damage.
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