Screw drilling and driving hardware (countersunk and auto-to

R

Rod

Guest
I need to fasten many circuit boards to new housings and need to have
flat Phillips head screws counter-sunk into the board.

I there any hardware out there that:
(1) Drills the hole and the countersunk depression in one movement?
(2) Power screws in the (small) screws to a pre-determined torque?

Thanks for any knowledge

Rod
 
Hey
Using a countersink tool is easy, and only takes a few seconds.
Fine, as long as you dont have to do hundreds of them.

I havent checked, but at Bunnings (an australian store) i think you can get
drill attachments with a torque control.
Some drills already have one built it - i thing some brands call it a
"slip-setting".
My corless drill (about 4yo) has it. It's not perfect, but it does the job.

Hope it Helps
RoD

BtW: you stole my name. LOL.
 
On Thu, 08 Apr 2004 12:49:27 GMT, Rod <rod3567@yahoo.com> wrote:

I need to fasten many circuit boards to new housings and need to have
flat Phillips head screws counter-sunk into the board.

I there any hardware out there that:
(1) Drills the hole and the countersunk depression in one movement?
(2) Power screws in the (small) screws to a pre-determined torque?
Click to expand...
---
Google is your friend...

for the drill-countersink:
http://shop.store.yahoo.com/squaredrive/cs04-0125.html

and for the adjustable torque tool:
http://www.deltaregis.com/webapp/wcs/stores/servlet/StoreCatalogDisplay?langId=-1&catalogId=10101&storeId=10001


--
John Fields
 
Rod wrote:

I there any hardware out there that:
(1) Drills the hole and the countersunk depression in one movement?
Click to expand...
A combined drill and countersink, often called a center drill, will do this.
These are available from machinist's suppliers, such as Enco
<http://www.use-enco.com/CGI/INSRIT?PMAKA=891-4354&PMPXNO=3904326&PARTPG=INLMK32>.
High speed steel is much cheaper than carbide, but will wear out very
quickly drilling circuit boards. Be sure to get the right angle to match
your screws--82 degrees for inch screws, 90 degrees for metric. Use the
center drill in a drill press and set the depth stop to get a consistent
depth.


(2) Power screws in the (small) screws to a pre-determined torque?
Click to expand...
You can buy torque screwdrivers powered by either electricity or air. Hios
<http://www.hios.com/eng/product/peripheral/> and Standard Pneumatic
<http://www.standardpneumatic.com/product/screwdrivers/2400.html> are a
couple of manufacturers.


--
--
Steve
 
Thanks RoD, I will slip on down to Bunnings but I fear they may not
have anything sensitive enough for smaller fasteners.

Re. the name: this country just isn't big enough for both of us -i'll
get out of here next week :)


On Thu, 8 Apr 2004 23:58:35 +0800, "RoD" <rod_1986@yahoo.com.au>
wrote:

Hey
Using a countersink tool is easy, and only takes a few seconds.
Fine, as long as you dont have to do hundreds of them.

I havent checked, but at Bunnings (an australian store) i think you can get
drill attachments with a torque control.
Some drills already have one built it - i thing some brands call it a
"slip-setting".
My corless drill (about 4yo) has it. It's not perfect, but it does the job.

Hope it Helps
RoD

BtW: you stole my name. LOL.
Click to expand...
 
Thanks John, yes Google is my friend but sometimes I just don't know
what to feed it!

Thanks again

Rod
 
"Rod" <rod3567@yahoo.com> wrote in message
news:p7ia70dcudsl9dljhdh7the87crhuaknar@4ax.com...
I need to fasten many circuit boards to new housings and
need to have
flat Phillips head screws counter-sunk into the board.

I there any hardware out there that:
(1) Drills the hole and the countersunk depression in one
movement?
(2) Power screws in the (small) screws to a pre-determined
torque?

Thanks for any knowledge

Rod
Click to expand...
Sounds like you need the help of a mechnical person to set
up your mechanical work.
Why are you using countersunk screws in PC board?
This is generally not recommended because the wedge shape of
the countersink will crack the board if someone tightens the
screws too much and the world is full of Someones.
--
John G

Wot's Your Real Problem?
 
Thanks Steve for the leads -very helpful. I had no idea that metric
and imperial head angles were different -the things you learn!

Thanks again.

Rod
 
John,

I need the countersunk type because a mechanism intrudes close to the
face of the circuit board. Its too late to go back and redesign
another solution so on we go in this direction. I guess we just have
to place torque sensing drivers in the hands of our 'someones' and
advise other 'someones' not to attempt their own maintainable...

Thanks

Rod
 
Rod <rod3567@yahoo.com> wrote in message news:<vq7c70tj32ji5ulb8u52pdooh2hv68jm1n@4ax.com>...
John,

I need the countersunk type because a mechanism intrudes close to the
face of the circuit board. Its too late to go back and redesign
another solution so on we go in this direction. I guess we just have
to place torque sensing drivers in the hands of our 'someones' and
advise other 'someones' not to attempt their own maintainable...
Click to expand...
Making it clear you'll only let those authorised to do this assy job
to touch the job, and giving them this little bit of training, should
minimise failures.

Regards, NT
 
Rod <rod3567@yahoo.com> wrote in message news:<vq7c70tj32ji5ulb8u52pdooh2hv68jm1n@4ax.com>...
John,

I need the countersunk type because a mechanism intrudes close to the
face of the circuit board. Its too late to go back and redesign
another solution so on we go in this direction.
Click to expand...
There are some other solutions around, including standoffs that are
embossed into the circuit board and boards that are not held by
threaded fasteners at all (i.e. held in slots etc.)
Whether these other solutions work in your environment
or not is the big question.

Countersinking holes in thin PCB sounds like a big mistake to me.

Tim.
 
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