Bit of background first...
The other day I bought an Aldi Die Grinder. It was rubbish! The main problem was the inbuilt wobble feature of the collet - LOTS and LOTS of run-out. It was also very noisy. I could live with the noise, but not the wobble so I took it back. Then in a moment of weakness I started looking for a better unit and promptly bought an Ingersoll Rand 5108MAX. The difference is like chalk and cheese (not surprising really).
Anyway, this got me thinking about regulated pressure and the pressure drop along my airline so I could make sure I gave the 5108MAX the air it needs.
I knocked up this little thing tonight - simple inline gauge that plugs in just before the die grinder.
In-line Air Pressure gague by Jon_Kelly, on Flickr
As a starting point I plugged it straight into the tank. As expected when the trigger is pulled the pressure remains the same. Its a different story 15m along the 10mm ID air hose - 20psi lost.
Just for fun I then plugged my 8m 6mm ID coiled hose into the end of the 15m hose and pulled the trigger again - 50psi lost:o:o:o
In summary:
- 0m hose, 0psi pressure drop
- 15m 10mm ID hose, 20psi pressure drop
- 15m 10mm ID hose + 8m 6mm ID hose, 50 psi pressure drop
My next question is what to set the regulator at? Should the gauge at the regulator read 90psi or adjust it until I get 90psi with an open trigger at the die grinder?
The other day I bought an Aldi Die Grinder. It was rubbish! The main problem was the inbuilt wobble feature of the collet - LOTS and LOTS of run-out. It was also very noisy. I could live with the noise, but not the wobble so I took it back. Then in a moment of weakness I started looking for a better unit and promptly bought an Ingersoll Rand 5108MAX. The difference is like chalk and cheese (not surprising really).
Anyway, this got me thinking about regulated pressure and the pressure drop along my airline so I could make sure I gave the 5108MAX the air it needs.
I knocked up this little thing tonight - simple inline gauge that plugs in just before the die grinder.
As a starting point I plugged it straight into the tank. As expected when the trigger is pulled the pressure remains the same. Its a different story 15m along the 10mm ID air hose - 20psi lost.
Just for fun I then plugged my 8m 6mm ID coiled hose into the end of the 15m hose and pulled the trigger again - 50psi lost:o:o:o
In summary:
- 0m hose, 0psi pressure drop
- 15m 10mm ID hose, 20psi pressure drop
- 15m 10mm ID hose + 8m 6mm ID hose, 50 psi pressure drop
My next question is what to set the regulator at? Should the gauge at the regulator read 90psi or adjust it until I get 90psi with an open trigger at the die grinder?
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