Just picked up a new to me old Hahn-Kolb rotary table. About the only info I found on it was a question on PM that went unanswered about 11 years ago (by the person I bought it from).
Seems to be a super precision table - 120 turns per rev - dial is graduated in arc seconds on the vernier. Only piece missing is the indicator for the degree markings on the table itself - seems to have gone missing. It fits into a small radial dovetail.
Some pictures
top view
Hand wheel showing vernier - there is a clear window over the vernier. Note the block with 3 cap screws - this encases a mechanism to mechanically move the vernier.
name plate - note the grease/oil fitting visible
Last one for the moment (less than optimum) a follower that runs under the 360 scale - it moves the vernier - which would correct for inor imperfections in the worm - similar to how Sip corrects on a MP3K
So anyone seen one of these before?
Would like to clean it up as it is quite grungy but key workings all mover freely. Drawings or experience from others who have seen one of these would help - I know you never want to use force on things as precise as this.
Have info on what oils to use? there is a sight glass so I want to fill with appropriate oil, there as well as all the other fittings.
Know if it was made by Hahn-Kohl - or who it was actually made by.
As noted the compensation mech seems similar to what Sip used on non optical jig bore.
Posted here as recommended by a fellow PM member -
Thanks for any help
Paul
I can post additional pictures (hopefully better ones of details)
Seems to be a super precision table - 120 turns per rev - dial is graduated in arc seconds on the vernier. Only piece missing is the indicator for the degree markings on the table itself - seems to have gone missing. It fits into a small radial dovetail.
Some pictures
top view
Hand wheel showing vernier - there is a clear window over the vernier. Note the block with 3 cap screws - this encases a mechanism to mechanically move the vernier.
name plate - note the grease/oil fitting visible
Last one for the moment (less than optimum) a follower that runs under the 360 scale - it moves the vernier - which would correct for inor imperfections in the worm - similar to how Sip corrects on a MP3K
So anyone seen one of these before?
Would like to clean it up as it is quite grungy but key workings all mover freely. Drawings or experience from others who have seen one of these would help - I know you never want to use force on things as precise as this.
Have info on what oils to use? there is a sight glass so I want to fill with appropriate oil, there as well as all the other fittings.
Know if it was made by Hahn-Kohl - or who it was actually made by.
As noted the compensation mech seems similar to what Sip used on non optical jig bore.
Posted here as recommended by a fellow PM member -
Thanks for any help
Paul
I can post additional pictures (hopefully better ones of details)