_______________________________________________ Developers mailing list Developers@reprap.org [reprap.org] https://reprap.org/forum/read.php?2,1008,1008#msg-1008 Fri, 06 Mar 2026 06:09:25 -0500 Phorum 5.2.23 https://reprap.org/forum/read.php?2,1008,1036#msg-1036 https://reprap.org/forum/read.php?2,1008,1036#msg-1036
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----- Original Message ----
From: Adrian Bowyer
To: developers@reprap.org
Sent: Tuesday, April 10, 2007 4:31:09 PM
Subject: Re: M5 Grub Question

Quoting Sebastien Bailard :

> As an aside, have you ever made a drill bit from drill rod? I think it might
> be a good way to make the extra long 3 MM drill bits we're going to need now
> and then. I think I need some because the 3MM extra long milling bits I
> ordered a god-damned month ago haven't arrived yet. #&%!!!!

The magic words are "long series" applied to drill bits - they make 'em
pretty long...

Best wishes

Adrian

Dr Adrian Bowyer
[staff.bath.ac.uk]
[reprap.org]
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[reprap.org]]]> Forrest Higgs Developers Tue, 10 Apr 2007 19:40:53 -0400 https://reprap.org/forum/read.php?2,1008,1035#msg-1035 https://reprap.org/forum/read.php?2,1008,1035#msg-1035
> As an aside, have you ever made a drill bit from drill rod? I think it might
> be a good way to make the extra long 3 MM drill bits we're going to need now
> and then. I think I need some because the 3MM extra long milling bits I
> ordered a god-damned month ago haven't arrived yet. #&%!!!!

The magic words are "long series" applied to drill bits - they make 'em
pretty long...

Best wishes

Adrian

Dr Adrian Bowyer
[staff.bath.ac.uk]
[reprap.org]
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[reprap.org]]]> Adrian Bowyer Developers Tue, 10 Apr 2007 19:31:05 -0400 https://reprap.org/forum/read.php?2,1008,1027#msg-1027 https://reprap.org/forum/read.php?2,1008,1027#msg-1027
>> What's to stop you, aside from machinery aesthetics, from just using a
>> standard M5 bolt that's longer than that hole it sits in and let the top
>> stick out? :-)

Yeah, the grubs were suggested to improve aesthetics - and they do! So
it's feasible to replace these with M5 caps with the heads hangin out.
But there's always one... (three in this case) a few need to be grubs
because of the clearances involved.

> Also, set screws aren't smooth like normal bolt ends, they have cone points,
> flattened cone points, etc. etc. - my sleep addled brain glossed over that
> bit.

Damn good point Seb, I've updated the wiki - I used grubs with gnarly
faces which take a real bite into the steel rods.

>> > Do those grubs need to be made out of steel?

Yep, that's a must. Cheers for the embedded vid Zach.

eD


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[reprap.org]]]> Anonymous User Developers Tue, 10 Apr 2007 17:56:04 -0400 https://reprap.org/forum/read.php?2,1008,1025#msg-1025 https://reprap.org/forum/read.php?2,1008,1025#msg-1025 be a good way to make the extra long 3 MM drill bits we're going to need now
and then. I think I need some because the 3MM extra long milling bits I
ordered a god-damned month ago haven't arrived yet. #&%!!!!***

1/8 inch is 3.175 mm. Why don't you buy one of those in a long length, wrap a couple of thicknesses of wet and dry black sandpaper around the business end and sand it down every so slightly. :-)

----- Original Message ----
From: Sebastien Bailard
To: Forrest Higgs
Cc: developers@reprap.org
Sent: Tuesday, April 10, 2007 1:25:52 PM
Subject: Re: M5 Grub Question

On Tuesday 10 April 2007 16:07, you wrote:
> ***p.s. I imagine if you are ever desperate you can cut the head off a
> bolt, grind it smooth, and cut a slot into the top.***
>
> What's to stop you, aside from machinery aesthetics, from just using a
> standard M5 bolt that's longer than that hole it sits in and let the top
> stick out? :-)
>
I'm assuming Ed and Adrian had a good reason for specifying the size set
screws they did.

Also, set screws aren't smooth like normal bolt ends, they have cone points,
flattened cone points, etc. etc. - my sleep addled brain glossed over that
bit.

As an aside, have you ever made a drill bit from drill rod? I think it might
be a good way to make the extra long 3 MM drill bits we're going to need now
and then. I think I need some because the 3MM extra long milling bits I
ordered a god-damned month ago haven't arrived yet. #&%!!!!

-Sebastien

> ----- Original Message ----
> From: Sebastien Bailard
> To: developers@reprap.org
> Sent: Tuesday, April 10, 2007 12:55:52 PM
> Subject: Re: M5 Grub Question
>
> On Tuesday 10 April 2007 14:55, Zach 'Hoeken' Smith wrote:
> > Do those grubs need to be made out of steel? I'm on Amazon looking at
> > parts, and it seems they only offer them in Nylon. Is that acceptable?
>
> I'm guessing Nylon won't be good - the grub screw is to hold a shaft in
> place, probably, and steel will bite into the shaft better.
>
> Amazon Industrial -> set screws -> M5, M8, etc. Steel set screws. Did
> they not have the size we need?
>
> ###first draft###
> Travers.com has them, under "Metric Socket Set Screws". As I remember,
> Travers is is browsable with firefox, but the ordering doesn't work, so you
> may need to phone them. KBCtools.com has them as well, on page 769.
>
> McMasters will have them, as well, along with the companies that come up
> when you google "fasteners" or "set screws" - fastenal.com has them. (A
> quick google suggests that fastenal is a big operator, and is probably
> reliable.) ###end first draft###
>
> -Sebastien
> p.s. I imagine if you are ever desperate you can cut the head off a bolt,
> grind it smooth, and cut a slot into the top.
> _______________________________________________
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> Developers@reprap.org
> [reprap.org]
>
>
>
>
>
>
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[reprap.org]]]> Forrest Higgs Developers Tue, 10 Apr 2007 17:42:13 -0400 https://reprap.org/forum/read.php?2,1008,1021#msg-1021 https://reprap.org/forum/read.php?2,1008,1021#msg-1021 > ***p.s. I imagine if you are ever desperate you can cut the head off a
> bolt, grind it smooth, and cut a slot into the top.***
>
> What's to stop you, aside from machinery aesthetics, from just using a
> standard M5 bolt that's longer than that hole it sits in and let the top
> stick out? :-)
>
I'm assuming Ed and Adrian had a good reason for specifying the size set
screws they did.

Also, set screws aren't smooth like normal bolt ends, they have cone points,
flattened cone points, etc. etc. - my sleep addled brain glossed over that
bit.

As an aside, have you ever made a drill bit from drill rod? I think it might
be a good way to make the extra long 3 MM drill bits we're going to need now
and then. I think I need some because the 3MM extra long milling bits I
ordered a god-damned month ago haven't arrived yet. #&%!!!!

-Sebastien

> ----- Original Message ----
> From: Sebastien Bailard
> To: developers@reprap.org
> Sent: Tuesday, April 10, 2007 12:55:52 PM
> Subject: Re: M5 Grub Question
>
> On Tuesday 10 April 2007 14:55, Zach 'Hoeken' Smith wrote:
> > Do those grubs need to be made out of steel? I'm on Amazon looking at
> > parts, and it seems they only offer them in Nylon. Is that acceptable?
>
> I'm guessing Nylon won't be good - the grub screw is to hold a shaft in
> place, probably, and steel will bite into the shaft better.
>
> Amazon Industrial -> set screws -> M5, M8, etc. Steel set screws. Did
> they not have the size we need?
>
> ###first draft###
> Travers.com has them, under "Metric Socket Set Screws". As I remember,
> Travers is is browsable with firefox, but the ordering doesn't work, so you
> may need to phone them. KBCtools.com has them as well, on page 769.
>
> McMasters will have them, as well, along with the companies that come up
> when you google "fasteners" or "set screws" - fastenal.com has them. (A
> quick google suggests that fastenal is a big operator, and is probably
> reliable.) ###end first draft###
>
> -Sebastien
> p.s. I imagine if you are ever desperate you can cut the head off a bolt,
> grind it smooth, and cut a slot into the top.
> _______________________________________________
> Developers mailing list
> Developers@reprap.org
> [reprap.org]
>
>
>
>
>
>
> ___________________________________________________________________________
>_________ Never miss an email again!
> Yahoo! Toolbar alerts you the instant new Mail arrives.
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[reprap.org]]]> SebastienBailard Developers Tue, 10 Apr 2007 16:26:29 -0400 https://reprap.org/forum/read.php?2,1008,1019#msg-1019 https://reprap.org/forum/read.php?2,1008,1019#msg-1019 ZachHoeken Developers Tue, 10 Apr 2007 16:17:19 -0400 https://reprap.org/forum/read.php?2,1008,1018#msg-1018 https://reprap.org/forum/read.php?2,1008,1018#msg-1018 grind it smooth, and cut a slot into the top.***

What's to stop you, aside from machinery aesthetics, from just using a standard M5 bolt that's longer than that hole it sits in and let the top stick out? :-)

----- Original Message ----
From: Sebastien Bailard
To: developers@reprap.org
Sent: Tuesday, April 10, 2007 12:55:52 PM
Subject: Re: M5 Grub Question

On Tuesday 10 April 2007 14:55, Zach 'Hoeken' Smith wrote:
> Do those grubs need to be made out of steel? I'm on Amazon looking at
> parts, and it seems they only offer them in Nylon. Is that acceptable?

I'm guessing Nylon won't be good - the grub screw is to hold a shaft in place,
probably, and steel will bite into the shaft better.

Amazon Industrial -> set screws -> M5, M8, etc. Steel set screws. Did they
not have the size we need?

###first draft###
Travers.com has them, under "Metric Socket Set Screws". As I remember,
Travers is is browsable with firefox, but the ordering doesn't work, so you
may need to phone them. KBCtools.com has them as well, on page 769.

McMasters will have them, as well, along with the companies that come up when
you google "fasteners" or "set screws" - fastenal.com has them. (A quick
google suggests that fastenal is a big operator, and is probably reliable.)
###end first draft###

-Sebastien
p.s. I imagine if you are ever desperate you can cut the head off a bolt,
grind it smooth, and cut a slot into the top.
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[reprap.org]]]> Forrest Higgs Developers Tue, 10 Apr 2007 16:08:13 -0400 https://reprap.org/forum/read.php?2,1008,1015#msg-1015 https://reprap.org/forum/read.php?2,1008,1015#msg-1015 > Do those grubs need to be made out of steel? I'm on Amazon looking at
> parts, and it seems they only offer them in Nylon. Is that acceptable?

I'm guessing Nylon won't be good - the grub screw is to hold a shaft in place,
probably, and steel will bite into the shaft better.

Amazon Industrial -> set screws -> M5, M8, etc. Steel set screws. Did they
not have the size we need?

###first draft###
Travers.com has them, under "Metric Socket Set Screws". As I remember,
Travers is is browsable with firefox, but the ordering doesn't work, so you
may need to phone them. KBCtools.com has them as well, on page 769.

McMasters will have them, as well, along with the companies that come up when
you google "fasteners" or "set screws" - fastenal.com has them. (A quick
google suggests that fastenal is a big operator, and is probably reliable.)
###end first draft###

-Sebastien
p.s. I imagine if you are ever desperate you can cut the head off a bolt,
grind it smooth, and cut a slot into the top.
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[reprap.org]]]> SebastienBailard Developers Tue, 10 Apr 2007 15:56:36 -0400 https://reprap.org/forum/read.php?2,1008,1008#msg-1008 https://reprap.org/forum/read.php?2,1008,1008#msg-1008 Developers mailing list
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[reprap.org]]]> ZachHoeken Developers Tue, 10 Apr 2007 14:56:29 -0400