Measures just under 21 all down shaft (centre section is same diameter). Liberally Coated in machine oil. Internally consists of two sets of bearing each with 4 races (8 in total). Each race has 7 balls visible.

Measures just under 21 all down shaft (centre section is same diameter). Liberally Coated in machine oil. Internally consists of two sets of bearing each with 4 races (8 in total). Each race has 7 balls visible.

Measures just under 21 all down shaft (centre section is same diameter). Liberally Coated in machine oil. Internally consists of two sets of bearing each with 4 races (8 in total). Each race has 7 balls visible.

It works fine, very smooth and precise. It will be cool if the length would be 60 mm ( the dubble of 2 single bearings).

It works fine, very smooth and precise. It will be cool if the length would be 60 mm ( the dubble of 2 single bearings).

It works fine, very smooth and precise. It will be cool if the length would be 60 mm ( the dubble of 2 single bearings).