36mm vs 27mm hose

[ear3]

There's probably a previous thread on this, but I couldn't find anything via a search, so I will pose the question (again?):

Just wondering what people's thoughts are on the differences between the 36mm and 27mm hoses in terms of collection efficiency on the various tools.  Intuitively a smaller diameter hose should equal more suction, but I've seen comments that suggest the 36mm is better when working with high volume producers like the Domino or Planer (maybe because they produce larger chips?).

 

[AlexThePalex]

The larger 36 mm hose is a lot better at collecting dust than the smaller 27 mm hose. Sorry, but your intuition is not correct. It leaves out the consideration that there is a lot more friction and turbulence in a smaller hose, which have a negative impact on overal suction power.

The larger hose can also suck up larger chips. And that's the reason it works better with tools that produce larger chips like a planer or router. The nozzle on the 27 mm hose on the other hand is so small, it is often blocked with chips when you use one of those tools, or with general clean up.

For smaller tools like sanders or jigsaws, the 27 mm hose works better. You dont need the higher volume of a larger hose, and it's smaller and therefor easier to handle when working with those tools.

 

[Stone Message]

There's probably a previous thread on this, but I couldn't find anything via a search, so I will pose the question (again?):

Just wondering what people's thoughts are on the differences between the 36mm and 27mm hoses in terms of collection efficiency on the various tools.  Intuitively a smaller diameter hose should equal more suction, but I've seen comments that suggest the 36mm is better when working with high volume producers like the Domino or Planer (maybe because they produce larger chips?).

It is not just about the amount of vacuum but also about the volume of air being sucked through the system.

You should consider the 36 mm hose for a Kapex (essential), a TS75 or 55, OF2200 and, although I do not have one, planers. I hope that I have not missed any other 36 mm kit.

Peter

 

[tbellemare]

The 27mm hose significantly constricts the airflow of the Festool CT's.

As Alex pointed out, that's fine for sanding but not most other tasks.



Tom

 

[ear3]

Thanks for the video Tom.  That makes the differences obvious.

 

[Coen]

There's probably a previous thread on this, but I couldn't find anything via a search, so I will pose the question (again?):

Just wondering what people's thoughts are on the differences between the 36mm and 27mm hoses in terms of collection efficiency on the various tools.  Intuitively a smaller diameter hose should equal more suction, but I've seen comments that suggest the 36mm is better when working with high volume producers like the Domino or Planer (maybe because they produce larger chips?).

Smaller diameter might mean a higher air movement speed at that spot, but it's not so much higher that it compensates for the smaller diameter.

The main reason people around here use the 36 instead of the 27 has to do with the nozzle getting blocked on the 27. Especially with planers, but I've had it happen with the TS55 too.

 

[grbmds]

In general, much better results with the 36mm hose for the saws, Domino, and routers. With sanders, my experience has been the 36mm hose makes it hard to use them because of less hose flexibility and possibly too much air movement so that it's hard to adjust the vacuum down enough so that the sander doesn't chatter. When you use a 36 mm hose, you do need to deal with adapting the hose connection down to 27mm for sanders. This isn't big deal but just something you need to deal with.

 

[leftistelf]

Why wouldnt anyone recommend the 50mm hose?

 

[semenza]

Why wouldnt anyone recommend the 50mm hose?

That would be pretty big and clunky on the tools. And not really needed for added air flow.

Seth