Author Topic: Festool Precisio saws  (Read 10981 times)

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Offline Alex

  • Posts: 7570
Re: Festool Precisio saws
« Reply #90 on: February 10, 2021, 05:19 PM »
But as it is, making a threaded connector like a bolt spin very fast, at 4000 RPM, will have an effect on it. Depending on the direction of the rotation, it will loosen or get tighter, there is no way around it.   
I've had multiple saws (hand and stationary) and never had arbor nut/bolt to loosen or tighten from use. This never happens because arbor flange that goes between blade and bolt always has flat spots that match flat spots on the arbor shaft. Hence, the flange can not rotate relative to the arbor, even if blade slips. On its own the momentum of the bolt is too small to rotate it when starting/breaking. Perhaps CS50/70 design is different.

The flange is not important, the bolt is, and its thread must always be round.

I never had a bolt come loose either on any of my saws. The bolts of my TS55 and my DW65 saws are always easy to loosen, and they are normal thread. But on the CS70 with its reverse thread it is not easy.

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Offline FestitaMakool

  • Posts: 1010
Re: Festool Precisio saws
« Reply #91 on: February 10, 2021, 05:22 PM »
Nope. Ordered yesterday.
I can´t wait to put my hands on it...

Nice.. hope your expectations are met. Mine certainly did, although I spent some time dialling in and adjusting (That was in my instance also rectifying some transport knocks) But now, I really enjoy the features and smooth control in this compact setup. I have used the sliding table and the pull/push features more than I initially thought.

Looking forward to see how you use it. I’m sure there are a few of us who’d like tips on add ons and self made jigs too. There’s just too little information about the CS 50, and the CS 70 follows on that too.
“The Stig” Yes, it is true, at least some part of it..
“If you have an old Land Rover and a fit wife, you’re most likely always busy”

Offline trebuchet

  • Posts: 39
Re: Festool Precisio saws
« Reply #92 on: February 10, 2021, 05:31 PM »
yeah.. very little information... and most videos are from people only talking about the machine... not using it.
It comes from Germany to Spain...

Offline Svar

  • Posts: 2402
Re: Festool Precisio saws
« Reply #93 on: February 10, 2021, 05:31 PM »
But as it is, making a threaded connector like a bolt spin very fast, at 4000 RPM, will have an effect on it. Depending on the direction of the rotation, it will loosen or get tighter, there is no way around it.   
I've had multiple saws (hand and stationary) and never had arbor nut/bolt to loosen or tighten from use. This never happens because arbor flange that goes between blade and bolt always has flat spots that match flat spots on the arbor shaft. Hence, the flange can not rotate relative to the arbor, even if blade slips. On its own the momentum of the bolt is too small to rotate it when starting/breaking. Perhaps CS50/70 design is different.
The flange is not important, the bolt is, and its thread must always be round.
I never had a bolt come loose either on any of my saws. The bolts of my TS55 and my DW65 saws are always easy to loosen, and they are normal thread. But on the CS70 with its reverse thread it is not easy.
Flange is important, because when the blade slips it drags flange and bolt with it. It is the only way to inadvertently rotate the bolt.
I have a table saw with reverse (left) thread. It never tightens in use either.
It does not matter whether it's right of left thread. Bolt/nut is always tightened in the direction opposite to blade rotation. I.e. left tilting saw - right thread, right tilting saw - left thread.
« Last Edit: February 11, 2021, 01:57 AM by Svar »

Offline Alex

  • Posts: 7570
Re: Festool Precisio saws
« Reply #94 on: February 10, 2021, 05:48 PM »
It is the only way to inadvertently rotate the bolt.

A bolt can come loose by vibrations alone, happens all the time in machines.

Second, a bolt on a saw experiences forces in two directions, one during start-up and in the opposite direction when the blade spins down.

Offline Coen

  • Posts: 1055
Re: Festool Precisio saws
« Reply #95 on: February 10, 2021, 08:26 PM »
Perhaps CS50/70 design is different.

Not perhaps... absolutely sure of that.

The CS50 has blades with a star-shaped hole. The blade can not slip, even with loosened or absent bolt... However, with loosened bolt... it does wobble.
The CS50 has the bolt and the outer flange integrated in one piece that is hand-tightened by means of a C-clip that you can fold out of it