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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Inverse Screws
Need to disassemble a motor (see cooling fan thread) which is held
together by four long machine screws with a head that I have never seen before. Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Anyone come across this before? Does it have a name? Andrew |
#2
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Inverse Screws
"Andrew May" wrote in message ... Need to disassemble a motor (see cooling fan thread) which is held together by four long machine screws with a head that I have never seen before. Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Anyone come across this before? Does it have a name? Andrew There are umpteen types of tamper resistant screw head available. This may be a custom one made solely by the motor manufacturer. I'm sure you can hacksaw or file a matching slot in something you can then drive with a socket or similar. A bit of scrap bar with the slot at one end and a cross hole drilled through it at the other to take a tommy bar would suffice. You might even be able to just grip the ridge on the screw with mole grips if it's high enough. -- Dave Baker --- news://freenews.netfront.net/ - complaints: --- |
#3
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Inverse Screws
On Mar 21, 11:55*am, Andrew May wrote:
Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Does it have a name? None that are printable. Drivers are easy enough to make (old hex bit, cut a slot), but they're a very fragile head. Enough torque to put them in clean, not enough to get them out once manked into place. Maybe they're deliberate? I've had some out, but never a whole motorful as there was always one that was too tight and the head stripped. I ended up dremelling a new slot, then taking them out with a conventional screwdriver. |
#4
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Inverse Screws
On Mar 21, 11:55*am, Andrew May wrote:
Need to disassemble a motor (see cooling fan thread) which is held together by four long machine screws with a head that I have never seen before. Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Anyone come across this before? Does it have a name? Andrew Maplins usually sell them: http://www.maplin.co.uk/ratchet-and-...c=so&u=strat15 but also search for security screwdrivers on eBay. rusty |
#5
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Inverse Screws
On Mon, 21 Mar 2011 14:47:12 -0700, therustyone wrote:
On Mar 21, 11:55Â*am, Andrew May wrote: Need to disassemble a motor (see cooling fan thread) which is held together by four long machine screws with a head that I have never seen before. Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Anyone come across this before? Does it have a name? Andrew Maplins usually sell them: http://www.maplin.co.uk/ratchet-and-...bit-set-37794? tabid=1&criteria=usb&c=so&u=strat15 but also search for security screwdrivers on eBay. Any idea which out of that set is the raised slot? Would be useful to have the correct name for further searching. Andrew |
#6
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Inverse Screws
On Mar 22, 9:29*am, Andrew May wrote:
On Mon, 21 Mar 2011 14:47:12 -0700, therustyone wrote: On Mar 21, 11:55*am, Andrew May wrote: Need to disassemble a motor (see cooling fan thread) which is held together by four long machine screws with a head that I have never seen before. Imagine a slotted machine screw but with a 'slot' that is raised rather than sunken. Anyone come across this before? Does it have a name? Andrew Maplins usually sell them: http://www.maplin.co.uk/ratchet-and-...bit-set-37794? tabid=1&criteria=usb&c=so&u=strat15 but also search for security screwdrivers on eBay. Any idea which out of that set is the raised slot? Would be useful to have the correct name for further searching. Andrew to be fair, I found my set of bits, but there's nothing exactly like an inverse screw. There are 4 plain screwdriver bits with a rectangular slot in the middle which are 4,5,6 and 6 mm diam. Might do if the screws aren't too tight. rusty |
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