Pekka, I think Dave is spot on but I'll check absolute size next time I crawl over to the workshop. The bore is 1MT
Just at the moment I'm recovering with a
cans of Old Speckled Hen having been squirting unbelievably expensive vetmeds down lambs throats (£150 for a 1 litre bottle
) against coccidiosis. They didn't want it to happen and are amazingly agile and fleet of foot.
The later Arrand spindles called themselves 'milling and grinding' spindles. The only difference apparent is a lubrication fitting screwed in the side !