This topic contains 18 replies, has 0 voices, and was last updated by Alex 11 years, 7 months ago.
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July 25, 2013 at 4:14 am #103051
After a bit of interest in this subject on my crf450 thread I thought it could be helpful to start a new thread on just this subject.
I’m sure Teknik will put in some great advice to help us all
Here’s a video ( done by Stephen Hawkins it sounds like
) on Time serts
http://youtu.be/anjDQJtWFc8Nick
July 25, 2013 at 4:17 am #246941July 25, 2013 at 4:28 am #246944July 25, 2013 at 4:29 am #246945July 25, 2013 at 4:35 am #246946Don’t want to sound difficult but that isn’t a genuine helicoil kit and some from experience the cheaper kits are crap, the coils break and you end up in my trouble than you started in. The threads break, arent made from stainless, the tags snap before the thread is seated. The genuine kits are more expensive
Just saying
TB
July 25, 2013 at 4:36 am #246942Great thread Jacko,,
I have used Helicoils many times in various applications in the past and they are pretty solid
Never heard of the Timeserts ,, but it is always good to have more options …Cheers
July 25, 2013 at 4:41 am #246951July 25, 2013 at 4:46 am #246947Trailboss wrote:Don’t want to sound difficult but that isn’t a genuine helicoil kit and some from experience the cheaper kits are crap, the coils break and you end up in my trouble than you started in. The threads break, arent made from stainless, the tags snap before the thread is seated. The genuine kits are more expensive
Just saying
TB
Great point TB , I was just searching for a picture example and this came up , good to know their are some cheaper sub standard copies out there !!
Nick
July 25, 2013 at 8:36 am #246952July 25, 2013 at 8:48 am #246985Hey Nick
We use Helicoils (brand name) at work.
Never had a problem, never really had to use them very often.
(probably less than 6 times over my whole time as a fitter, 32 years)
Good luck with what ever you decide on doing. :unsure: 😆 :blink:
Cheers
MurphJuly 25, 2013 at 11:18 am #246943I have used the helicoil branded ones for a long time in my workshop and have found them easy to fit and extra strong.
Have used them heaps in alloy chainsaw engines. The only negative I found was sometimes when you are removing a bolt were a coil has been used the coil can wind out as well.
There are a lot of different ones on the market I also find that the size you have to drill out to fit the coil with helicoils is only minimal.Just my opinion
RobertJuly 25, 2013 at 11:25 am #247002July 25, 2013 at 11:30 am #247004You can see from that last photo there are 3 different depths of coils, 1D, 2D and 3D. The Std 1D are 1x the thread diameter in length. In most cases that’s all the thread you need.
However in high load situations you may need 2D and 3D.
You can also see the solid inserts, the timesert brass looking sparkplug inserts and the pre loctited Loc sert for when helicoils are stripped outJuly 25, 2013 at 11:34 am #247006Now you can see the issue with helicoils, they are just a spring you wind into an oversize tapped hole.
1. Loctite won’t hold them in, it’s an anaerobic sealant (needs absence of air to dry) The gaps won’t let it go off when you fit it. So you wind your bolt in and the loctite gets on your bolt, then it dries. The next time you pull it out the insert comes out too.
2. You need to be careful not to skip a thread when you install it, especially if it’s not a deep hole, the tap will stop cutting before the bottom and the insert will jump. Then you wind the bolt in and cross thread it at the bottom. Awesome to take out. Not.
July 25, 2013 at 11:37 am #247010 -
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