View Single Post
  #63  
Old July 11th 18, 11:51 PM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 547
Default drill/tap in frames

On Wed, 11 Jul 2018 10:18:38 -0700, Jeff Liebermann
wrote:

On Tue, 10 Jul 2018 21:25:06 -0700, John B. Slocomb
wrote:

On Mon, 09 Jul 2018 10:55:00 -0700, Jeff Liebermann
wrote:

On Mon, 9 Jul 2018 16:21:43 +0000 (UTC), David Scheidt
wrote:

sms wrote:
:On 7/7/2018 7:27 AM, Emanuel Berg wrote:
: Are there any secrets to drilling holes in
: steel bike frames? I have a couple of discarded
: ones I can test on but I thought I'd
: ask anyway.
:
: Do you use normal power hand tools like
: a drill-screwdriver and/or a drill press (if
: possible with the desired bolt position)?
:
: Do the normal rules apply, e.g. to get
: a threaded hole for an M6, you first drill with
: a 5.0mm drill?
:
: And you can use chainsaw oil, right?

:As Jobst Brandt stated: "I don't know many riders who believe that
:drilling a hole in a frame tube is a reasonable concept."

Who cares what riders think, what do the egineers do?

Jobst Brandt was a mechanical engineer.
https://en.wikipedia.org/wiki/Jobst_Brandt

What's an egineer?


One might comment that a fairly large number of bridges, that
subsequently fell down, were designed by the engineers of the times
:-)


Therefore, anything designed by an engineer will eventually fall
apart. I like the logic.


Hardly logic :-) Note the wording "engineers of the times" which is
probably more indicative of the fact that one method of gaining
knowledge is to fail, a few times :-)


The problem with mechanical engineering is that problems, such as
falling bridges, are easily visible. Even Joe Sixpack can recognize a
mechanical failure. The fault is always with the architect or
designer, and never with cost cutting contractor, sloppy construction
company, defective imported components, blind inspectors, bribed
officials, or the demands of the aesthetics committees. It's for this
reason that I chose to go into electronics. Few can recognize an
electronic problem or find someone on the design staff to blame. It's
safety through obscurity.

--

Cheers,

John B.
Ads
 

Home - Home - Home - Home - Home