21-11-2021, 07:09 PM
Hi Colin
Here are some photos of my tool for grinding faces of axle and stub king pin eyes made by small local engineer firm. I refer to Big 7 but it is same construction for Ruby and other 7s, just that the Big 7 has 5/8 king pins instead of 1/2 inch and the thrust sits up in a recess on the underside of the axle end. The diameter of the cylinders you will need will also vary from those I show. I had the cylinders made to grind the maximum diameter on axle and stub axle eyes. The cylinders are held onto the pilot by a grub screw.
Right hand cylinder has 2 different diameter for grinding different size faces and there is a second cylinder for a third diameter.
THE TOOL
In position for grinding stub axle lower eye face
Then upper eye face; you will notice the engineer's bluing on the cylinder lower eye face.. the bluing is applied to the face after cleaning off the grinding paste and the cylinder rotated against the stub eye where it will leave blue marks where the face has been ground away. Keep grinding till the blue marks on the stub form a complete ring.
Nearly there
Finished, nice and blue all round.
Dennis
Here are some photos of my tool for grinding faces of axle and stub king pin eyes made by small local engineer firm. I refer to Big 7 but it is same construction for Ruby and other 7s, just that the Big 7 has 5/8 king pins instead of 1/2 inch and the thrust sits up in a recess on the underside of the axle end. The diameter of the cylinders you will need will also vary from those I show. I had the cylinders made to grind the maximum diameter on axle and stub axle eyes. The cylinders are held onto the pilot by a grub screw.
Right hand cylinder has 2 different diameter for grinding different size faces and there is a second cylinder for a third diameter.
THE TOOL
In position for grinding stub axle lower eye face
Then upper eye face; you will notice the engineer's bluing on the cylinder lower eye face.. the bluing is applied to the face after cleaning off the grinding paste and the cylinder rotated against the stub eye where it will leave blue marks where the face has been ground away. Keep grinding till the blue marks on the stub form a complete ring.
Nearly there
Finished, nice and blue all round.
Dennis