Jim,
Yes, you can use 4” instead of 100mm. ?Focus on finding hose with good flexibility since the tilting trunion will mash and stretch whatever hose you use. ?It also helps if you get a hose with a smooth interior wall. ?Polyurethane will be a much better choice than PVC. ?The Felder HD stuff is a good choice, but if they don’t have stock, then I would focus on another supplier. ?I have no experience with this hose or company, but they do sell a polyurethane 100mm version by the meter: ?
If you use 4”, you will discover that you have two transitions to make inside the machine: one on the saw trunion, the other where the hose attaches to the chassis extractor port.?
You will need a custom adapter on the trunion end - probably either way (100mm or 4”). ?Nordfab, and I’m sure some others will make you a custom metal adapter. ?But I recommend you work with Bill Belanger to design and get a 3D printed part fabricated.
David Best
DBestWorkshop@...
https://www.flickr.com/photos/davidpbest/collections/
https://www.youtube.com/@David_Best
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On Mar 26, 2024, at 1:10?PM, Jim Fleming <jameshfleming@...> wrote:
The internal hose in my slider has disintegrated.? Felder is out of stock both here and in Austria.? They forecast an 8–10 week delivery delay for a replacement.? Further, some years ago, David Best recommended against using Felder hose and favored Air Handling's AH Plus product.? Air Handling no longer has that product designation but offers a few abrasion-resistant choices at a significant up charge.??
So now, my questions:? 1.? Can I substitute a slightly larger 4" hose for the 100mm original?? 2.? Is there a method to fit a 4" hose (internal circumference 12.42") onto the rectangular chute that measures 4.75" x 1.75" (outside dimension 13")?? 3.? How can I form the reinforcement wire in the hose from a circle to a rectangle, just bend the wire?? 4. How does one install this stuff one-handed via the minuscule access opening?? 5.? Are there any outside the box solutions like (a) commissioning a metal or 3-D printed rectangle-to-round transition or (b) sealing all of cabinet openings (except for the blade assembly) and evacuating the whole plenum with a 6" vacuum line?
It has already occurred to me that a few inexpensive changes at the design and manufacturing end would have minimized this annoying problem, but I don't have a time machine so that is out.? Any other suggestions will be gratefully appreciated.?
Thanks.
Jim Fleming
David P. Best