duanedr 

I have been wanting a boroscope for ages. I am recently feeling like I have a few extra bob in my pocket so I took a chance on Amazon and purchased a $60 Deptech boroscope. Mainly I just wanted to keep an eye on my welding and brazing penetration out of curiosity. Being of a certain age, and notably frugal, my wife was concerned I was trying to cut our medical costs.

Here are the first few pictures - Sorry about the size.

This is inside of a nickel fillet brazed joint on a segmented fork crown. The tube with the hole in it is the steerer. There's a big fat bead around the inside which is pleasing but there are a couple spots that look like the steerer tube wasn't quite hot enough for the filler to fully wet out. It just sort of flowed through the gap and pooled up. I'm confident it's strong but, I think I can heat from the inside of the steerer to get better adhesion on this.



here's a picture of the inside of a silver lugged joint: Again, there is a clear inner fillet which is comforting.


I spent a lot of time cutting open early joints so I am pretty confident but it's nice to now have ability to check without destructive testing!

unterhausen

I have never spent quite that much on an amazon boroscope. It is nice to see internal fillets.

duanedr 

I was feeling rich and wanted to take a risk. I generally try to stay away from Amazon because I just have been disappointed so many times. I'm fairly impressed with this one though.

Andrew R Stewart 

I looked at boroscopes a few years ago and decided that the probe end would have to be smaller in diameter than the low cost models seemed to all have. Smaller than 6mm to be able to fit in 1/4" vent holes.

While I also wish for internal fillets (and follow a technique that helps to better attain one) I understand that they (internal fillets) are not needed for the joint to outlast the tubing. To me they are about a complete tube to tube flow and not about any added strength. Andy

unterhausen

Mine is described as: "DEPSTECH 5.5mm Waterproof Borescope Semi-Rigid Snake Inspection Camera for OTG USB-C"
I think 5.5mm doesn't really match how big the end is though. No longer available, apparently

It works pretty well, I found the app annoying and installed another one

duanedr 

This has a 5.5mm camera/light at the end as well as one out the side of the probe for looking 90* through a hole. Did you install an app on the viewer device or does yours connect to your phone? This one has a decent 4.3in screen and 1080p resolution and came with a 32GB mini SD card. I didn't want something attached to my phone as I expect I will drop it a couple times and phones are expensive.

To Andy's point about the inner fillet, I agree but it's comforting to know it's there. This is my first segmented fork with ATC a shade over 400mm. I wanted to make sure that the crown wasn't a failure point. I used 1.125" x .065" 4130 tubing for the segments and the sockets for the 1" round tapered blades (1mm walled). It's going to be heavy but so am I.

unterhausen

Yeah, it attaches to the phone using usb C. I think when I bought mine, the ones that had a built-in display cost at least $100 and this cost $40. I haven't had trouble dropping my phone with it.

It was also pretty useful when I was trying to get more control wires through my lathe. For whatever reason, they took a very difficult path through the lathe to the front panel. Although in the end, I used the shopvac/string method. At least I knew what I was up against.

duanedr 

I am also working on a couple old vehicles and engine internals are unknow. This was pretty handy today to look into cylinders to see how bad the walls are. One cylinder has low compression, but the walls look fine so maybe it's valves, Anyway it's fun looking into holes I haven't previously been able to look into!