one way clutch on ink fountain roller

[imaquin]

Hi Wondering has anyone any ideas about a problem we have with the one way clutch on the end of the Ink Fountain rollers.

We have a QMDI classic and we have a problem on the ink fountain unit on PU3 (magenta)
The Bearing (HF1616) in the end of the ink fountain roller will "snap" and cease to act as a one way clutch meaning the roller will no longer advance

We will simply replace the bearing in the pressfit housing and continue. But this seems to be getting more frequent and is becoming a bit of a pain.

Do you think i need to replace roller (or get the drive end built up and turned back down to correct size) I have been buying INEA HF1616 Bearing which seem to be
the best I can source locally. I know these can be upgraded to 32mm instead of 16mm does anyone know is this very expensive upgrade?

Thanks

 

[qmdipress]

Yes it can be expensive to upgrade if you deal with the Big H.
WWW.QMDIPRESS.COM

 

[Paul Cavanaugh]

Building up the shaft and having it turned down does not work. The steel is tempered from the factory as this part is under constant heavy use from the one way clutch bearing. The reason the new bearings you are installing do not work is because the shaft is worn.

Another issue with the smaller shaft size is the casting the clutch bearing fits in. It has a tendency to develop hairline cracks, if you look at yours closely you may see one on the top.

A couple of issues I found with machines that had this problem were due to them using aftermarket fountain foils. The Heidelberg foil is a specific thickness (Which I am not able to remember.) and the zero position of the ink keys was set taking this thickness into account. With after market foils that are thicker then the factory foils this would cause a huge amount of stress on the overrunning clutch when the keys were in the zero position.

Inks in which the tack is to high also caused the failures in the machines with the smaller shaft sizes. Typically the 1st unit would fail as the black ink is usually the one with the highest tack.

The best way to accomodate these variables was to ink crease the shaft size of the fountain roller.

 

[imaquin]

We have always used genuine Ink Foils - Maybe the answer is to just buy new ink fountain roller - I'll price this of Heidelberg bound to be cheaper than upgading shaft size which I assume would require a lot of additional work

Ken

 

[qmdipress]

I have to agree with paul about the rebuilding the shafts. I have tried this and they work for a little while but either wear out again or break off completely. I have not been able to find someone who can rebuild these shafts the right way yet. But im still looking! Your best option is to upgrade. They are not very hard to install. I have sold many of the new style roller kits and help the pressman over the phone with the installation. If you are interested drop me an email.
WWW.QMDIPRESS.COM
DI Plates,parts and presses.

 

[imaquin]

Hi QMDIPRESS

Sent you a PM

 

[qmdipress]

Imaquin
I have not received your email yet. I have been problems with my email lately.
Please resend to snothem@aol.com OR anthony@qmdipress.com .

 

[Leonard Enterprises]

Hi Imaguin
I've personally tried the sleeving of the shaft on many classic Di's and true its not the ideal way it works but to be done right you most remove your old roller sleeve the shaft and reinstall it not really cost effective in my opinion the upgrade is very simple but there is some drilling and tapping to be done to complete the job properly you most also replace your sweep motor as well as i recommend as i don't think theres no way around it anyways we carry new and used newer model fountain rollers and can provide information installing the new roller feel free to contact us through email or phone

 

[R3dS1gn]

Hi Imaquin,
I made a modification of some partes to replace all the HF1616 for the HFL2530 ( this roller HFL2530 is the max size permissible to use most of the parts of the machine) the parts modified are:
From section D-20 of the Spare Parts Book; 2 Stop bearring Sleve ( Position 5) opened to get 25 mm, Lever CPL (Position 1) it is a new part made in a machining shop in order to fit the HFL 2530
From section D 15 of the spare parts book;Falanged bushing ( position 8) opened to fit a new bearing 6006 2RS instead the original bearing 6004 RS ( position 11), circclips (position 10 and 12). From section D 17 pull rod CPL ( position 5)
The cost for all parts of one kit/fountain was $ 1000 USD. You can do this modification. Regards lgasson@hotmail.com

 

[imaquin]

Hi thanks for all the replies - Our eventual solution was after replacing many bearings and many bearing holders - we bought an upgrade kit from WWW.QMDIPRESS.COM which consisted of New Ink Fountain Roller with larger shaft an larger bearing - large bearing housing new sweep motor and all the needed spings/spring post etc. We fitted new kit in less than an hour and it is running fantastic. With hindsight I should have done this in the first place. We are in UK (Northern Ireland) WWW.QMDIPRESS.COM is in USA - We received kit 2 days after ordering - amazing service!! thanks Anthony