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Message |
    
Gerald_D
Registered
Username: Gerald_d
Post Number: 349
Registered: 11-2005
| | Posted on Monday, October 30, 2006 - 08:56 pm: | 
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Received two HSD spindles today - except for the colour and cable connector, they are identical to the Fimec. These photos show the the fan arrangement before any modifications:
Air entry is through the grille on the back
The fan is exactly like a typical water pump - sucks in through the center and flings out around the perimeter
The alu body of the spindle is an extrusion with 4 colling holes. All the air just goes straight through the long holes. Nothing exotic.
If you have ever seen a siren, you'll notice that this is the same construction . . .
Easiest option? Remove fan and blow compressed air into the grille area of the cover...... (seal the grille so that no cold air escapes out that end) |
dan sutula
Registered
Username: Cadcamdan
Post Number: 1
Registered: 01-2007
| | Posted on Saturday, January 13, 2007 - 04:43 pm: |
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Gerald,
I noticed that the fan on this FIMEC/HSD spindle is of the radial-vane type. I recall from past experience that fans with "backwardly-inclined" vanes are typically quieter. Although - I doubt that the difference would be significant enough in this application, it is perhaps another "angle" to explore.
PS - Outstanding job on the MechMate Project - sharing your knowledge experience and design is a wonderful gift to fellow enthusiasts. Thanks! |
Gerald_D
Registered
Username: Gerald_d
Post Number: 709
Registered: 11-2005
| | Posted on Saturday, January 13, 2007 - 05:31 pm: |
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The really quiet fan is a separate Pabst 3656 fan mounted on the back (same as used by some Colombo spindles) Spec Sheet. This range of fans has a choice of Sintec bushes or ball bearings - the Colombo guys have discovered that the bushes don't work too well.
With my first Fimec, I removed the standard plastic fan off the shaft (it broke in the process) and replaced it with the Pabst. A small duct/adapter was needed. |
50. Toolheads