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Drilling holes into a chassis


Misternavi

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Hi all

i’m needing a few holes drilled into a chassis for my passive pre

 

i don’t trust myself to drill neatly

 

can anyone with a drill help?

 

Need 2x 12mm holes on back plate

1x small hole for ground plug

 

4x small holes for extension shaft plate.

 

I’m in Melbourne SE suburbs. Looking to do this end of Feb.

 

 

 

Ivan

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1 minute ago, misternavi said:

 

Hi all

i’m needing a few holes drilled into a chassis for my passive pre

 

i don’t trust myself to drill neatly

 

can anyone with a drill help?

 

Need 2x 12mm holes on back plate

1x small hole for ground plug

 

4x small holes for extension shaft plate.

 

I’m in Melbourne SE suburbs. Looking to do this end of Feb.

 

 

 

Ivan

 

This will do the job, quickly and neatly:

 

https://au.rs-online.com/web/p/products/1238514/?grossPrice=Y&cm_mmc=AU-PLA-DS3A-_-google-_-PLA_AU_EN_Tools-_-Power_Tool_Accessories_And_Drill_Bits-_-PRODUCT+GROUP&matchtype=&gclid=EAIaIQobChMI2aPOlL7Y2AIVDyUrCh2jWgROEAQYAiABEgKyufD_BwE&gclsrc=aw.ds

 

They are available in a number of sizes and from a variety of sources. Even Bunnings. 

 

https://www.bunnings.com.au/craftright-10-30mm-step-drill-bit_p6290411

 

Perfect for drilling sheet metal. It automatically de-burrs the hole for you!

 

 

 

 

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13 minutes ago, Zaphod Beeblebrox said:

This will do the job, quickly and neatly:

 

https://au.rs-online.com/web/p/products/1238514/?grossPrice=Y&cm_mmc=AU-PLA-DS3A-_-google-_-PLA_AU_EN_Tools-_-Power_Tool_Accessories_And_Drill_Bits-_-PRODUCT+GROUP&matchtype=&gclid=EAIaIQobChMI2aPOlL7Y2AIVDyUrCh2jWgROEAQYAiABEgKyufD_BwE&gclsrc=aw.ds

 

They are available in a number of sizes and from a variety of sources. Even Bunnings. 

 

https://www.bunnings.com.au/craftright-10-30mm-step-drill-bit_p6290411

 

Perfect for drilling sheet metal. It automatically de-burrs the hole for you!

 

 

 

 

https://www.bunnings.com.au/craftright-10-30mm-step-drill-bit_p6290411

 

where would you be without Bunnings....:P

 

 

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Buy the cheap one if you only want to use it a few times, if you intend to use it quite a bit it is well worth paying the extra.

I bought the cheap one for 12 holes admittedly in 3mm aluminium and it is just about totalled now.

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Hi Buddy

Once you get the hand of drilling large diameter holes in thin sheet, you will be set for all future projects.

Do not try and use a 12mm standard type drill bit in thin sheet, as it will "wonder" . The reason being, that the point will break through before the edge of the drill starts cutting.

 

For this reason, use a stepper bit, or a good quality hole saw, and undertake a trial with other material.

 

1. Centre punch the exact hole location.

2. Drill a pilot hole with say a 2 or 3mm drill.

3. Drill required hole with stepper or hole saw.

4. Do not go at max speed. All you will do is damage the cutting tool.

5. Use lubricant. (even CRC will do at a pinch)

6. A stepper or hole saw will leave you with a very clean cut, with little of no de-burring required.

7. If available, use a drill press, and clamp the work.

 

I promise you, once you have done a few times, it will be second nature, and you will not have any fear for future projects.

Cheers

George.

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  • 2 weeks later...
What sorta passive pre are you building ?


i have a intact audio/slagle autoformer from 2005 rats nest wires before it cleaned up with a pBC.

putting it into a smaller chassis so i can hide it inside a cabinet.

so i was forced to buy a stepped drill bit to fix something in the apartment and i have to say it was sooooo easy to use but i will still get someone to help drill some new holes in my to be purchased chassis.
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