|Blue Heeler||16/07/2019 00:35:12|
189 forum posts
I have a rounded Torx Screw in a lathe bit. Any hints on an easy removal method?
Edited By Blue Heeler on 16/07/2019 00:46:25
|Dinosaur Engineer||16/07/2019 01:46:18|
|145 forum posts|
I had a damaged torx screw a few weeks ago on the underside tray of my VW golf. the correct size key was too small and the next std. size key was too big. My initial thought was to drill it out and fit a larger screw ., But I thought one idea was worth a try. I used a small ball pein hammer to spread the metal around the torx insert and then hammered the correct size key in. This worked a treat.
|Speedy Builder5||16/07/2019 07:36:15|
|2006 forum posts|
Now the head is "mashed" up, try to ram anything in, even a flat screwdriver bit with some epoxy on the end. Let it set for a day and try that. Failing that, with safety goggles on, smash the insert which will leave the end of the Torx screw proud ?
|Vasantha Abey||16/07/2019 07:56:03|
|16 forum posts|
get a concrete drill bit of the smallest size with a carbide tip, grind it carefully, the tip to the screw head diameter, with a positive rake angle or flat rake. Normally the concrete drill tips are with a negative rake, blunted to prevent shatter .
use a silicon carbide grinding wheel for this grinding business. then with slow speed drill out the head only, remove the tip and use a plier to remove the end
If you are an expert in welding, use a very thin welding electrode or may be a mig or tig and build on the screw and then weld a small steel rod end to the screw and you are then in business to remove the screw.
|Andrew Evans||16/07/2019 07:57:55|
|314 forum posts|
Left hand drill bit if you have one.
74 forum posts
Look up the thread “saving a tool holder” on here to see another way of doing it.
|Blue Heeler||16/07/2019 08:19:13|
189 forum posts
Appreciate the advice so far all, I will be trying to get it out in the morning.
981 forum posts
Use a Dremel or similar with a small cutting disc to make a screwdriver slot, then slightly round the screwdriver to match and it should come out. Did my Screwcutting tool years ago and still use a normal screwdriver because I am unable to purchase a new screw—- 1/8 x 40 Whitworth!
|374 forum posts|
+1 for the Dremel and thin cutting disk, I have got many screws out successfully this way.
456 forum posts
I think a lot of the problems with mangled screws, Torx, Phillips, Hex, Etc. is caused by dirt in the recess which prevents the driver from full engagement. Even when the dirt is finally cleaned out, the upper section of the recess has been rounded so there is now less surface area for the tool to grip. I see this happen so often and think when are folk going to learn, clean the dammed recess first.
Having said all of that, I do think that the recess in the Torx screws the Blue Heeler is referring to are often very shallow.
With the tool well supported, try using a small punch to hammer the screw head into shape, the lots of downward pressure whilst turning.
Just my two pennys worth.
|327 forum posts|
I had the same problem with a second hand tool. I just hit the carbide tip with a chisel to break it. The screw then just came out by hand.
|Howard Lewis||16/07/2019 15:54:03|
|3259 forum posts|
+1 for "break the tip and remove it". With no load on the screw, it may well be easily removable. If not, at least the circumference of the head is now accessible for gripping in pliers / small mole wrench. Small, because we are talking 2.5mm thread. Hopefully, this method removes the risk of ruing an expensive tool holder.
Edited By Howard Lewis on 16/07/2019 15:54:43
|Mike Poole||16/07/2019 16:06:59|
2572 forum posts
Watch out for spline drive on VW, looks like Torx until you find your Torx bits don’t fit.
|old mart||16/07/2019 16:23:24|
|1744 forum posts|
Those torx screws are not all that hard, so drilling the head is possible. Just look at a spare screw profile to see how deep to drill. The edges if the drill will be the worst for wear after hitting the hole in the insert, but its easy to re sharpen a drill.
As for cracking the carbide tip, don't just hit it, put the tool in a vise with the insert away from you and use a drift or chisel to stretch the screw a little. Do not try to knock the insert off, just loosen it. then the screw should turn easily.
1093 forum posts
The search engine on here's not too bright, try "saving a toolholder" i.e. no space in the last word
Alternatively look HERE
|Blue Heeler||17/07/2019 01:58:26|
189 forum posts
Cheers all, broke the insert and the screw came out easily with pliers
|2500 forum posts|
Good idea! You win the cigar!
|327 forum posts|
I can't take credit for the idea I'm afraid. My Dad worked as a CNC machinist for a while and he told me this is how the workers dealt with carbide tips on damaged milling cutters.
Edited By Hollowpoint on 17/07/2019 12:01:03
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.