Mechanical Dimension of HB-25

bdrew7

I am removing the fan of the HB-25, and I want to embed the aluminum block of the HB-25 into a much, much larger heatsink.· The HB-25 will simply set down into a cavity the size of the outside dimensions of the HB-25 aluminum block, and it will be secured by the four screws.

Does any one have the mechanical drawings of the HB-25, so I can get the screw hole locations, thickness of the aluminum block, and the corner radii?

Thanks
Bernard

Bruce Bates

Bernard -

I do hope you are going to replace the fan, once the HB-25 is inset in the new heat sink. Without adequate ventilation you may get very short life if there is any significant heat generated by the existing heat sink and components. Additionally, the components would benefit from the forced air cooling.

Changing an existing design like that, involving fan forced cooling, is usually asking for trouble, in my experience. The cooling system is inherent in the design of the HB-25 motor controller.

Regards,

Bruce Bates

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"Genius is one percent inspiration and ninety-nine percent perspiration."

Thomas Alva Edison

bdrew7

Thanks Bruce.

The heat sink I am replacing the fan with is 19.25" long by 8" wide with 20 ribs 1" high.· We have modeled the potential heat transfer, and it looks to be most adequate.· Will let you know.