Okay, okay, I know you're growing weary of all my duct-dust threads, but I just had to share this.
Getting plastic flex over the S&D pipe is a frustrating challenge. I tried the freezer and hair dryer trick (didn't work well), liquid dish detergent (works great slipping the pipe into the fittings and allowing the fitting to swivel to fit, but sucks trying to get flex over the pipe). So what the heck, I tried making a reducer.
If you look carefully, you can see the seam in the smaller diameter pipe. I sliced out a section lengthwise on my cheapo B&D 3 wheel bandsaw, sanded the edges with 220, applied a liberal amount of PVC cement to the seam (inside and out) and then around the perimeter, and slipped the section in the standard pipe. I wouldn't use this for a pressure fluid application, but for dust work, it works real well. Feeding the pipe slowly into the blade is helpful.
Now, I know you hate math, but it can be your friend. The wall thickness of my 4" D2729 pipe is 0.085" (for the 6" stuff, it's 0.11~ or thereabouts). By doubling the wall thickness, and muliplying by that nefarious constant Pi (3.14159), we derive the value of 0.53". Mark that width on the outside of the pipe, slice it out, and glue it up. The plastic flex slips easily over the reducer.
If I had thought to do this before I bought my expensive acrylic tubing, I would have had enough pocket $$ to buy something worthwhile.
Getting plastic flex over the S&D pipe is a frustrating challenge. I tried the freezer and hair dryer trick (didn't work well), liquid dish detergent (works great slipping the pipe into the fittings and allowing the fitting to swivel to fit, but sucks trying to get flex over the pipe). So what the heck, I tried making a reducer.
If you look carefully, you can see the seam in the smaller diameter pipe. I sliced out a section lengthwise on my cheapo B&D 3 wheel bandsaw, sanded the edges with 220, applied a liberal amount of PVC cement to the seam (inside and out) and then around the perimeter, and slipped the section in the standard pipe. I wouldn't use this for a pressure fluid application, but for dust work, it works real well. Feeding the pipe slowly into the blade is helpful.
Now, I know you hate math, but it can be your friend. The wall thickness of my 4" D2729 pipe is 0.085" (for the 6" stuff, it's 0.11~ or thereabouts). By doubling the wall thickness, and muliplying by that nefarious constant Pi (3.14159), we derive the value of 0.53". Mark that width on the outside of the pipe, slice it out, and glue it up. The plastic flex slips easily over the reducer.
If I had thought to do this before I bought my expensive acrylic tubing, I would have had enough pocket $$ to buy something worthwhile.
