05-07-2019, 09:42 PM
Loose eyes have been a Seven attribute forever, esp here where many roads were endlessly corrugated metal.
With the pre Girling stubs oversize kingpins are inconvenient as a blind reamer is required.
The time honoured method for Sevens is to red heat the eye and forge smaller. The metallurgical aspects are dubious especially on the nth repeat. May contribute to cracking often evident where the H section begins. However sure to have been done at some time.
For other makes for modest stretch a bead of weld is used to shrink. Despite room for much more metal the eyes are very small for the later heavy cars. A general reinforcing with weld seems prudent.
(In NZ, despite the improved safety, welding is not allowed for 6 monthly w.o.f so has to be disguised)
With the pre Girling stubs oversize kingpins are inconvenient as a blind reamer is required.
The time honoured method for Sevens is to red heat the eye and forge smaller. The metallurgical aspects are dubious especially on the nth repeat. May contribute to cracking often evident where the H section begins. However sure to have been done at some time.
For other makes for modest stretch a bead of weld is used to shrink. Despite room for much more metal the eyes are very small for the later heavy cars. A general reinforcing with weld seems prudent.
(In NZ, despite the improved safety, welding is not allowed for 6 monthly w.o.f so has to be disguised)