TS 75 blade nut stick

[yellowtruck75]

I am trying to change my TS75 blade and the nut is stuck.  I am border line rounding over the hex head in the bolt.  It’s been quite sometime since I have changed the blade.  Any suggestions for removing the blade without damage?

 

[tjbnwi]

Cordless impact, make sure you're turning the bolt the proper direction.

Tom

 

[Birdhunter]

I use a product called Kroil Penetrating Oil to free seized metal parts. I soak the nut and bolt with Kroil. On a TS75, I would not let the Kroil run into the saw. After a few hours, and after being absolutely sure which way to turn the nut, I’d try loosening it. I use Snap-On sockets since I get a really snug fit and won’t round over the nut.

Good luck and don’t let the saw blade cut you when the nut breaks free.

 

[Gregor]

Similar problem, with brute force solution:http://festoolownersgroup.com/festool-tool-problems/ts-75-tight-arbor-nut/msg347458/#msg347458

 

[ear3]

PB Blaster is also a good loosener if you find yourself at Home Depot, where it is a stock item.

The TS75 nut is a lot more finnicky than the TS55 for some reason.  When I first got mine I thought it might be defective, since you have to turn the nut against significant resistance for like the last 1/2-3/4s of a turn to fully tighten the blade, unlike on the TS55 where it is smooth until it locks.  But I went to the dealer to test out the blade changing action on their display model, and saw that it was the same.

 

[Svar]

The TS75 nut is a lot more finnicky than the TS55 for some reason.  When I first got mine I thought it might be defective, since you have to turn the nut against significant resistance for like the last 1/2-3/4s of a turn to fully tighten the blade, unlike on the TS55 where it is smooth until it locks. 

That's because TS75 has a set of Belleville washers inside arbor assembly. They act as a clutch to preserve gears and motor in case the blade gets jammed at full speed. They compress as you tighten the arbor bolt adding resistance and it feels different than on any other saw.

 

[ear3]

Ah, that explains it.

The TS75 nut is a lot more finnicky than the TS55 for some reason.  When I first got mine I thought it might be defective, since you have to turn the nut against significant resistance for like the last 1/2-3/4s of a turn to fully tighten the blade, unlike on the TS55 where it is smooth until it locks. 

That's because TS75 has a set of Belleville washers inside arbor assembly. They act as a clutch to preserve gears and motor in case the blade gets jammed at full speed. They compress as you tighten the arbor bolt adding resistance and it feels different than on any other saw.