Heat Build Up in RO 90 is this normal ?

[windmill man]

I am relatively new to Festool sander but have lots of there other tools.

I have replaced my old  sanders with Festool over the last 6 months.

Up until today I have always used them with festool dust extraction.

To cut a long story short i used my RO90 for a very short period ( about 10 mins) with out extraction and noticed it got hot and i mean very hot!!!!!!!!!! There was no smell of electrical burning or hot bearings and it sounded fine and lost no power . The bottom of the motor housing got very hot and the under guard???????(if you know what I mean) also got very hot. Almost hot enough to burn you.

Is this normal?

Am i correct that the sanding head is belt driven from the motor and that the belt runs in the underguard housing?

Am right in assuming that i have not experienced this up to now as the extraction has "air cooled" the machine?

I am slightly concerned about it as if I had , had to carry on I feel that I would have burnt something out.

John

 

[awdriven]

You're not the first person to comment about the RO90 getting hot. Your comment about the dust extraction is an interesting one though - I hadn't thought about it before, but I think the dust extraction is definitely used to aid in cooling.

I'd put a good amount of use on it with the CT26 attached and hadn't noticed much heat - but when I used it for polishing the other week (no dust extraction) I thought 'Man alive, this thing gets hot.'

I'll gladly accept the heat output in light of the great power it has. Festool could have probably used a less powerful and cooler-running motor - but it wouldn't have been as much of a powerhouse then.

 

[jmbfestool]

Yes mine gets hot also with no extraction but with extraction I have found I can use it for longer periods of time before it starts to get a litte warmer/hot

Jmb

 

[WarnerConstCo.]

It is my only Festool sander that after about 15 minutes of use, gets very hot.  All the heat blows on your hand by the back of the unit.

It gets to the point you don't want to keep sanding.  This is always with my CT hooked up.

 

[Guy Ashley]

I am relatively new to Festool sander but have lots of there other tools.

I have replaced my old  sanders with Festool over the last 6 months.

Up until today I have always used them with festool dust extraction.

To cut a long story short i used my RO90 for a very short period ( about 10 mins) with out extraction and noticed it got hot and i mean very hot!!!!!!!!!! There was no smell of electrical burning or hot bearings and it sounded fine and lost no power . The bottom of the motor housing got very hot and the under guard???????(if you know what I mean) also got very hot. Almost hot enough to burn you.
Is this normal?

Am i correct that the sanding head is belt driven from the motor and that the belt runs in the underguard housing?

Am right in assuming that i have not experienced this up to now as the extraction has "air cooled" the machine?

I am slightly concerned about it as if I had , had to carry on I feel that I would have burnt something out.

John

Oh Bless!! Stop using your wifes handcream on your classical pianists hands, do some hard site work and your hands will toughen up you Northern woos! And cut out the manicures! ;D

 

[windmill man]

Thank you Gentlemen  [smile]        and Mr Ashley, [unsure]

I love the 90 and was rather concerned about the heat build up, but as long as its relatively normal, so be it.

Am I correct in thinking that it is belt driven?

If the belt is of the wrong tension I can really understand how it gets so hot so quickly.  I will just have to remember to use extraction .

[big grin] [big grin]

Right I am off to belt out a little ditty by Beethoven on the Joanna in the drawing room, No 5 , i think.

Now Guy, you know how much i love my manicures [eek] .

Funnily enough I was working in the manicure and pedicure suite today.

John

 

[peter halle]

Yes there is a belt.

Peter

 

[bobbobbob]

Since I haven't picked up an RO90 yet, is this heat issue just during the break in period?  I have a RO150 FEQ and remember going through that initially but after the break in period,  it was fine.  Please let me know what you've experienced RO90 owners...

 

[windmill man]

Any one know if this gets worse with use or better?

The 90 is 4/5 months old and has seen a good amount of use.

Wonder if the belt is still tight and causing it or the belt is loose and rubbing on the housing ?

Back to Harpsichord practice

[smile] [smile]

 

[fidelfs]

I am waiting to hear the experiences from others as well, I am waiting to buy it.  The 30 days is not enough for me to test a tool, it is a hobby so the time I use it is not even close to you guys.

Keep coming all the good and bad things.  I need to make my decision.

 

[windmill man]

The R0 90 is a fantastic powerful little workhorse sander that does all the fiddly bits as well .

Well worth the addition to anyones tool collection.

As stated I only noticed this today  [smile]

The performance has not suffered and it sounds sweet still but it was very hot,

John

 

[PaulMarcel]

I know this was discussed before; it definitely gets warm-to-hot in the back.  I've never run it without dust extraction so I don't know how that affects the cooling; I'd guess 'adversely'.  I've also never gotten a manicure.

I've definitely run it for a long time and in aggressive rotary mode for shaping, which means I was pressing pretty hard on the head greatly increasing the work for the sander.  Add to that a 100ºF+ shop and it had good reason to get warm, but I'd only find it uncomfortable if I hung on to the hot spot for a very long time; or if I got manicures

In another thread, I mentioned that it would be cool (sic) if there was more of a fan on the drive shaft so it could more actively pull air through the back motor.  Shane said the vents on the side and the belt action are all that's needed.  While that may be true, I think keeping the motor much cooler more aggressively would help it out.

You won't be disappointed in the sander (assuming its size is correct).

I have to stop typing now as I think I cracked a nail  [embarassed]

 

[windmill man]

Hi Paul

Dont you just hate it when that happens , it can ruin your day [big grin]

Mr Ashley recommends Acrylics and a good moisturising cream for the cuticle [eek]

John

 

[ccarrolladams]

My oldest RO150 was purchased in February 2006. It is still used several days a week and has not required service.

When I bought it my dealer advised me to connect it to my CT22 and clamp in to a bench so the RO150 could run without actually sanding for several hours to "break-in" the gears. That was a cool day and after 8 hours the body of the RO150 was hardly scalding hot.

I have never used it without connecting it to a CT22 or 36 with a 27mm AS hose. I do not use this sander to shape, so it seldom is running more than 5 minutes at a time.

I use a dedicated polisher when polishing.

 

[jmbfestool]

The R0 90 is a fantastic powerful little workhorse sander that does all the fiddly bits as well .

Well worth the addition to anyones tool collection.

As stated I only noticed this today  [smile]

The performance has not suffered and it sounds sweet still but it was very hot,

John

Did you only notice it 2 day OR cus its a question answer contest to why you started this thread.

[tongue]

 

[windmill man]

Hi Brett,

I only noticed it today, the first time i used it with out the ct26. Thats why I asked, not bothered about the contest, more concerned that there was a problem.

john

 

[Ken Nagrod]

I'd be interested in getting some info on this.  I have a really good thermal gun and it would be perfect for monitoring tool temperature as it progresses from let's say, brand new and off (stagnant baseline) to first start and run condition over a period to see how the temps fluctuate.  Who knows, maybe there is an issue and Festool doesn't realize it without actual field data.  Anybody near me plan on getting an RO 90?

I had posted previously about having issues like this with my first Fein Multimaster.  It went back and forth to Fein without a solution.  They tested it on a bench, I tested it in actual use.

 

[vwdave]

A RO90 is on my short list. I could have used it today to sand some corners, I had to use my multimaster.

 

[NVA_WW]

I've used my RO90 with the polishing pad and it's gotten really hot.  I've polished the glass in our shower and waxed parts of my car.  Of course, this has been without any dust extraction.  I have not seen any degradation in the performance of the tool, so I'm keeping my fingers crossed this is normal.  I've used my RO90 quite a bit since I purchased it in March.

 

[awdriven]

I have an RO90 and could work with you on those measurements, Ken.