Table.
Feed handle raises the quill and gravity feeds it, I think maybe a spring is missing from the top which would reverse this.
The pulley setup should look something like this one.
Some did have a main drive pulley which connected to a line drive, others had their own motor at the base and connected where the line drive would be. These must have been around over a crossover period. Which of these mine was originally is unknown. Although based on the history of the RSB lathe it suggests that this was an late 1800s drill. In the advert above you can see both options belt and motor driven were available.
I estimate the large pulley should be about 4"x1⅜" and the speed of the driving pulley (aka motor speed?) 550 RPM based on various brochures.
Definitely think this was a thrust bearing but it has been castrated & lost its balls
Keyway has seen better days.
Really thinking there is something missing from in here, There is a pin on each half and those flats must have served some purpose? Maybe a return spring?????? Any ideas??
Rack & pinion show a little bit of wear.
This grub screw and nut hold the sleeve in place with that groove, do you think this is correct or modified??
The butchered grub screw here which has definitely been a hack job is filled on the end to work as a key. What should it have been?????
I have so many questions and the is so little info I can find. Some photos or adverts for "similar" drills, but they still don't show what is inside!
I'd love to know what mounted at the base? I can only assume it was a bracket for the stepped pulleys.
I deduce there was a two position arm with a locking screw at the elbow with guide pulleys. As the belt turns 90 deg over those guides I am thinking the tangent of the pulley would align with the centre of the drive pulley?? If I figure out the pulleys I can then work out the arc of the arm as it rotates between positions hopefully. Would the guide pulleys have bearings, or just greased up steel on steel? There isn't any bearings any where except for the one (thrust bearing) I believe should have been in the spindle.
How much crowning is required on the pulley and how much wider than the belt would they be?
What size would the second stepped pulley be if the larger was 4½" and how do I calculate the ratio of the pulley at the top to the pulley at the bottom and then to the drive pulley and to the rpm of the motor to get the correct drill speed. That is too much maths for me!
I also would like to know how the remove the chuck from the spindle. My guess is the spindle has a short taper which friction fits into the chuck?
This one might be easier to answer, drill chuck keys do they come in standard sizes?? It is missing on this drill and doesn't match the three keys I have. The chuck is un branded.
How hard would it be to set the table up perpendicular to the column and have the raised portion of the table redone on a surface grinder???
Ok I'll stop babbling on now…………..
No comments:
Post a Comment