For some reason one of the two retaining M4x8 retaining screws (part no 228737) is not holding in the tapped hole.I have some non Festool M4x16 screws which I can cut down in length but they do not seem to have the same pitch thread.from reading on the net there are two possible pitches,course and fine but course seems to be the norm except in exceptional situations.Can anyone shed any light on one what the problem might be with the original screw and two anything about the differing pitches,thanks
OF1010 base plate screws
- Thread starter Woodmatt
- Start date
Bohdan
Member
M4 threads come in either .7 mm (course) or .5 mm (fine). If the thread in the base is stripped it can be easily repaired by tapping and inserting a helicoil. Repair kits are normally sold by places like bearing suppliers.
Xoncention
Member
- Joined
- Aug 17, 2015
- Messages
- 111
At 4mm there are two possible thread pitches. 0.7 (course) 0.5 (fine) In standard metric, there are in fact 14 thread pitches available. You will most likely never have use for them in your tools.Woodmatt said:
If the threaded hole is not holding the screw, then you can replace the thread with a helicoil or some other thread replacement system. If you don't remove the screw very often, you could just loctite it in place - use the removable compound to make the job simpler.
Thank you both for your speedy replies.I do have some of the Loctite Threadlock 222,the "removable" adhesive so I will give that a try, if I have no joy with that I will get a Helicoil repair kit which I have just looked up on line( never knew such things were available).So thanks again for the advice.Where would we be without forums.
Re. Helicoil - Several years ago my Toyota 4Runner blew out a spark plug and stripped the threads in the hole on the aluminum head. The Toyota service department used a helicoil to repair the stripped spark plug hole. Worked great and now have over 207000 miles on it without any problems.
Rip Van Winkle
Member
- Joined
- Nov 26, 2014
- Messages
- 301
If you're already drilling one of the holes out for a Helicoil or similar thread repair insert, you might want to think about redoing other threads in the same base, especially if you might remove and replace the base frequently. The steel inserts should prove much more durable over time. Some manufacturers will actually pre-install threaded insert in aluminum and magnesium cast parts in areas were the fasteners will constantly be removed and replaced.
ear3
Member
One of the base plate screws housings ony 1010 got stripped as well last year. I wasn't in despair ate need of the machine at the time so I j us sent it in to service through my dealer and had it back in a week.
But if you're cool doing the repair yourself it's a whole lot quicker.
But if you're cool doing the repair yourself it's a whole lot quicker.
Cheese
Member
Rip Van Winkle said:
I agree, when you purchase an install kit they include 6-10 inserts, why not put them to good use. Certainly at the very least, check the remaining holes and Helicoil any one that's questionable.
Festool installed Helicoils in the DF 500 base, it's curious that they wouldn't carry that across to their routers.
