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Wanted: Looking for a trunion for a columbia mod c
Posted: Mon Dec 01, 2025 5:24 pm
by ts_13
I am looking for a trunion for a columbia mod c. I have exhausted all they usual avenues, and have come up Snake eyes so far. Anybleads would be appreciated!
T
Re: Wanted: Looking for a trunion for a columbia mod c
Posted: Mon Dec 01, 2025 11:02 pm
by ChuckA
There are two sizes used. The short one is for reproducers mounted at an angle and long one for ones mounted horizontal.
It looks like the short one may be the same as used on Model AT machines.
Chuck
Re: Wanted: Looking for a trunion for a columbia mod c
Posted: Wed Dec 10, 2025 5:59 am
by JohnM
You’re actually looking for a ‘carriage’. A ‘trunnion’ is the portion of the casting that supports the metal rod/tube that the carriage runs along. The origin of the word ‘trunnion’ is the iron casting that the large pegs on the side of a cannon fit into. Trunnions are supports and are immobile.