RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1691 views POST REPLY
HomeAircraftHelicopterHIROBOOther › Engine mount screw is stuck - help
10-23-2006 02:08 PM  12 years agoPost 1
yapjy

rrKey Veteran

Singapore

My Posts: All  Forum  Topic

Hi,

I have over tighten a screw that holds the engine mount to the Freya Evo lower frame. Blue loctite was previously applied and this made the screw removal extremely difficult. In the process of removal, the hex button head was stripped and I had to dremel a straight cut on the button head so that I can use a "minus" screw driver. But the button head broke when I tried using the screw driver. Now I'm stuck with half a button head.


What should I do next?

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2006 02:19 PM  12 years agoPost 2
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

My Posts: All  Forum  Topic

Applying some heat to the screw should soften the loctite. As for getting it out, you might be best to remove the entire head of the screw, remove the other screws so you can remove the engine mount, then drill out the stub of the screw and retap the hole.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-23-2006 02:21 PM  12 years agoPost 3
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

My Posts: All  Forum  Topic

Hi yapjy

This is a real pain...

I would say. Grind the head off. Take care not to heat it too much or you will melt the plastic. Remove the other bolts and see if you can bend the frame and slip the plastic over the 'stud' and slide the motor/mount out. If it wont flex enough, split the frames. then grip the stud with vice grips. with lots of heat to break the loctite.

Paul

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2006 02:27 PM  12 years agoPost 4
z11355

rrMaster

New England

My Posts: All  Forum  Topic

you do stand a moderately good chance of damaging the plastic side frame
from the amount of heat that would be required to soften the
LLoctite and then trying to remove the screw.

I'd probably grind down the head, remove the other screws, remove
the lower frame piece (which will expose the 'stud', probably
remove the engine mount half (optional), heat up the screw w/ a
microtorch and using visegrips, remove
the screw.

In general, I replaced the button heads w/ socket heads. Most
button head screws are a little softer (10.9grade) than socket head.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2006 02:31 PM  12 years agoPost 5
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

My Posts: All  Forum  Topic

Good idea, get the engine mount out before applying heat. You should then have a bit of stub showing with which to grip using a pair of pliers. If you don't get the stub out, don't sweat it as the mount should hold fine with 5 screws.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-23-2006 02:39 PM  12 years agoPost 6
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

My Posts: All  Forum  Topic

While doing the grinding, spray lots of water onto the head to disipate the heat. I would use methalated spirits and a cloth over the engine to slop it going into the motor. I use meths because it is in my spray bottle for cleaning the heli....no other reason


Paul

PS you are lucky there is a washer between the head and the plastic. you will not mess up the frames while grinding.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2006 02:41 PM  12 years agoPost 7
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

My Posts: All  Forum  Topic

I sould have said: grind, stop...spray, dry, grind...repeat as required...

Paul

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2006 10:13 PM  12 years agoPost 8
Leif

rrElite Veteran

USA

My Posts: All  Forum  Topic

Or you could just grab the head with a pair of vice grips and try to remove the bolt that way. If the head shears off, then proceed with the previously recommended "splitting the frames" removal techniqe.

Once you have the engine removed, you can really heat the stub of the bolt and probably remove it. I've used the vice grip technique on broken-off bolts a number of times.

Leif

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2006 02:56 AM  12 years agoPost 9
jkelly

rrVeteran

Bedford, PA

My Posts: All  Forum  Topic

As an option you could drill the center of the screw and use a screw extractor. If you are careful you can do it with no collateral damage but if you aren't good with tools it may not be the right solution.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2006 09:34 PM  12 years agoPost 10
BLUETHUNDER

rrVeteran

Glass City

My Posts: All  Forum  Topic

You can also apply heat to the bolt with a high wattage
soldering iron, this should minimize any damage to the
plastic frame. Good Luck

PM  EMAIL  Attn:RR  Quote
10-26-2006 02:47 AM  12 years agoPost 11
yapjy

rrKey Veteran

Singapore

My Posts: All  Forum  Topic

I think I will use the screw extractor method.

Here's a good write up
http://www.bluepoof.com/motorcycles...crew_extractor/

Anyway, it is really a PITA to encounter this kind of situation. Takes away my flying time and tests my screwing skills.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2006 04:22 AM  12 years agoPost 12
jkelly

rrVeteran

Bedford, PA

My Posts: All  Forum  Topic

I'm no pro but using the extractor can be difficult especially if the loctite is holding strong. I try to drill deep into the screw and as large a diameter as possible. Before drilling be careful to get the drill started in the center. Use a dremel to start if you have to. The drilling will heat up the screw helping to loosen the loctite. Good luck!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2006 04:27 AM  12 years agoPost 13
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

Is the screw still stuck or what?

TM

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-28-2006 02:29 PM  12 years agoPost 14
high flyer

rrNovice

Standish, Maine, USA

My Posts: All  Forum  Topic

broken screw
Yapjy

There is a product out there called a "drill out". I got mine at a NAPA auto parts store, the napa balkamp part number is 770-3377, but you should be able to get them at almost any auto parts store. They are a screw extractor and drill bit all in one. On small screws and bolts they work 100% better than regular screw extractors. All you need is a reversible drill. One end of the thing has a reverse thread drill bit which 50% of the time ends up removing the screw while drilling the hole. If not, after you drill the hole you take the bit out of the drill,flip it around and the other end is made like a screw extractor. Put it back in the drill with this end out and start the drill spining in reverse. While the drill is spining gently but firmly jam the end into the drilled hole and the screw should come right out. I haven't had one not come out yet loctite or not. They make these small enough to take out a 2 mm bolt so size should not be an issue. I hope this helps, if it works it would keep you from having to take apart half the heli. Let me know if it helps.

High Flyer

Hirobo team pilot
Y/S team pilot

PM  EMAIL  Attn:RR  Quote
10-28-2006 05:29 PM  12 years agoPost 15
jkelly

rrVeteran

Bedford, PA

My Posts: All  Forum  Topic

That's a good point. I use the same tool but from Sears. It does work perfectly and quickly since it's chucked in a drill.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 01:14 AM  12 years agoPost 16
yapjy

rrKey Veteran

Singapore

My Posts: All  Forum  Topic

Hi guys,

Thanks for the help. The screw extractor doesn't work as I have difficulties drilling into the broken screw.

I ended up splitting the frame and heat the engine mount over the kitchen stove. The broken screw came off easily when the engine mount is very hot.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 01:53 AM  12 years agoPost 17
Chopper Man100

rrVeteran

Canton GA.

My Posts: All  Forum  Topic

I am going to get one of those neat screw extaction tools from napa for the future. That is way cool. I have used the older extraction tool, drill method. You have to admit, it is hard to do on small screws, its to easy to screw up. In this case the cap screw is steal and the engine mount is aluminum, to easy to miss the center of the screw and slip off it and drill the aluminum.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 05:58 AM  12 years agoPost 18
jkelly

rrVeteran

Bedford, PA

My Posts: All  Forum  Topic

yapjy, glad you got it. Too bad you have to go the long route.

Chopper Man100, the tool works great on stripped screw heads. Used it yesterday on two in an OS70. I've also used it on stripped set screws and it works perfectly.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 05:29 PM  12 years agoPost 19
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

My Posts: All  Forum  Topic

Not only is the bolt steel it is hardened. I have found them practically not possible to drill


Paul

PM  EMAIL  GALLERY  Attn:RR  Quote
10-29-2006 05:31 PM  12 years agoPost 20
z11355

rrMaster

New England

My Posts: All  Forum  Topic

not those bolts.

the washer is hardened as are the blade bolts but the stock
buttonhead engine mount screws are not.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1691 views POST REPLY
HomeAircraftHelicopterHIROBOOther › Engine mount screw is stuck - help
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Monday, December 17 - 11:51 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online