Alexandria General Supply currently has the Weller RCT Rope Cutting Tip for just $3.47.
The RCT is a loop of wire that attaches to the ubiquitous Weller 8200 soldering gun and has an iron “blade” for hot cutting plastic ropes. The hot cut seals the end, preventing fraying. It’s hard to tell the capacity but the tip width is listed as about 1-3/8″. I’ve always just used a standard tip hammered flat, but this seems to offer greater capacity. It’s also available on Amazon [What’s This?] and from Weller Direct for slightly more, but shipping as always may be an issue…so shop around.
Weller RCT [alexgs.com]