star screw can't 'unscrew'

narkeleptk

Joined Mar 11, 2019
586
Cut a slot into it with a dermal tool with flat cutting wheel and then use a flat head to remove or if you do not have the room use a small drill bit (smaller then the screw head) and drill into the center of screw enough for the flange of the screw to come off. After this you can take apart your device and then can usually remove whats left of the screw with vice grips.

you can also try placing a small rubber band between screw and driver and attempt to unscrew this way.
 

Tonyr1084

Joined Sep 24, 2015
9,744
Something I suggested earlier - use of a Dremmel. In your case DON'T DO THAT! You don't need metal filings floating around inside your electronics. I imagined you were trying to open a cover, meaning the electronics were still inside, still protected from the elements.

As for the recommendations to drill it out - again, metal shavings inside your electronics is not desirable. If you DO go that route have a vacuum removing the chips as they are created. But also concern yourself with ESD. Vacuums can generate a ton of static electricity. When I vacuum up the pet hair I get a lot stuck to the vacuum itself. Static.
 

Tonyr1084

Joined Sep 24, 2015
9,744
@narkeleptk post #11 I suggested the Dremmel. Given that this is in the electronics envelope making shavings or drilling out heads is not a good idea. I would caution against that. However, the rubber band idea was a good one. Too bad it didn't work.

What @Yaakov suggested about using the wrong screwdriver - you may still have a chance to get the screw out if you didn't use the proper one the first time. It's "IFFY" but it's possible. Again, if you initially stripped the head out using the wrong size screwdriver.
 

Ylli

Joined Nov 13, 2015
1,092
Most likely, this is *NOT* a Phillips head. It is more likely a JIS screw head. (JIS = Japanese Industrial Standard). A JIS screw looks very similar to a Phillips, but trying to use a Phillips to loosen one up very often results in a stripped screw head.

A Phillips is actually designed to cam out when it takes too much torque to tighten or loosen it. A JIS fits squarely and lets you apply as much torque as you want. It may not be too late.... Borrow or buy (preferable borrow, they are expensive) a #0 or a #1 JIS screwdriver and give that a try.

I've got this set: https://www.amazon.com/Hozan-JIS-4-JIS-Screwdriver-3rd/dp/B00A7WAHTU
 

bwilliams60

Joined Nov 18, 2012
1,450
As suggested. Left hand drill bits will walk them right out. Option 2 is drill the heads off, remove component and then remove remainder of screw. If drilling heads off, use drill bit same size as thread and go down through center.
 

BobaMosfet

Joined Jul 1, 2009
2,211
Last edited:

ian field

Joined Oct 27, 2012
6,536
Someone please assist...Trying to remove a star screw : really small : the kind in a phone (not torx)

There are 5 screws, unscrewed 3 but the remaining 2 can't be unscrewed (bad screw)

How to remove the 2 screws?? Tried 1 another screw driver but nothing
A flat blade screwdriver usually gets the job done - but you may have grind/file it for a good fit. Discount store screwdrivers are usually adequate and better than carving up your good tools.
 

MisterBill2

Joined Jan 23, 2018
27,664
On a number of occasions I have discovered that the screwdriver is a bit worn, and so it slips. so a different screwdriver can be useful. In other instances the threads in the plastic are stripped, in that case gently prying the case open while turning the screw can work. And in at least one case the part that the screw was threaded into was broken off and so the screw turned but never backed out. And on a few instances using a sharp flat blade screw driver that just barely fit into the star opening was able to grab the ends of the opening and back the screw out.. Is the device a cell phone or a cordless phone, or just a wired phone?Amazingly, that affects the approach to use.
 

Tonyr1084

Joined Sep 24, 2015
9,744
Based on what @MisterBill2 said, I'm wondering if a flat blade screwdriver with the tip filed into two chisels will work. By that I mean that half the blade (one side) needs to be filed into a chisel so it cuts into the screw head. On the other side the angle needs to be cut in the opposite direction so that it, too, cuts into the head and tries to force the screw to unscrew. Not 100% sure on this one, but it just might work. You may even have to harden the tip of the screwdriver after you've filed it. YouTube should be able to help you with hardening steel.
 
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