C3 CASTMASTER pin strength test
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- Опубликовано: 4 окт 2024
- Testing the strength of the LOCK-N-STITCH C3 CASTMASTER crack repair stitching pin threads. This destructive test is one way LOCK-N-STITCH measures the strength of their products to determine the ultimate strength of their metal stitching repairs in cast iron. This process does not involve welding to hold the two pieces together.
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Im a metal artesan and had no clue this is possible! Great job
Marko glad you found us - thanks for watching! Reach out to us if you ever have a need for our products or services! 800/736-8261 or 209/632-2345 info@locknstitch.com
Impressive result
Thank you! Van den dal for watching and for your comment. We are passionate about having the very best products and solutions for our customers casting repair needs. If you ever need us please do not hesitate to reach out directly info@locknstitch.com or 800/736-8261 or 209/632-2345
Awesome example!
Consider me impressed
Mind blown
We are passionate about casting repair and glad we blew your mind! If you are ever in need of our products or services do not hesitate to reach out to us info@locknstitch.com or 209/632-2345
which bit broke? are you suggesting two smooth blocks of metal can be fastened with the castmaster screws?
@Alex Phillips Actually YES, they are. Has to do with special tap, thread angles, and counterbore geometry that pull sides together. Can't see the pin & tap thread angle details in video.
Image of pin, how angles under head hold/pull sides together
c1.a2109.com/cat2/g0/g010/g01042740.png
info/details from avspare.com/catalog/cat/content/i02406063/
smooth cut blocks test, showing blocks & pin, with good explanation but not clear thread/pin angles from photos
www.secondchancegarage.com/public4/metal-stitching-1.cfm
The pins use a patented hook thread with a negative 20-degree pressure angle on the top side of the threads. The shoulder above the threads has an opposing negative 30-degree hook angle under it.
When the shoulder seats into its counterbore, the pressure angle of the pin comes into contact with the matching pressure angle on the underside of the tapered hole. As the stitching pin is torqued, a radial drawing force is created, pulling the two sides of the joint together.
Exactly