Of course, I could not have used rollers. Everyone I've seen in that configuration had a serial prior to 1957. The traditional marking material is Prussian blue, but a line put on with a Sharpie, as shown here, works fine. I had my fingers crossed that it was not a 'huge' machine, because I had to get it down a flight of stairs to get it in my basement. But I may have to settle for just inside the garage. The thrill of the hunt is the best part. I don't know what else to call it.
The head carried an oscillating quill that could move the cutter through both convex and concave circular paths to perform rough and finished cherrying operations. Any info or ideas would be greatly appreciated. This was later changed to a 2hp motor. They are almost identical to visual inspection, and the Bridgeport heads are not marked in any way to indicate which they take - an annoying oversight by the normally meticulous little elves at Bridgeport. The two pictures below show the standard bearings on an R-8 Bridgeport type machine on the right.
Along with the machine serial number each milling head is numbered. This leaves the full wall thickness of the spindle. These are the same dimensions published by Bridgeport in the early 1950s, in their catalog. Our rebuilt machines are guaranteed for a period of 1 Year, under normal use and proper maintenance. The 50,000 mark was passed in the 1960's and the 200,000 mark in the 1970's. Hello Bill and welcome to the forum.
I then resize them to small 800 x 600 and then import them into a Photobucket library. Somebody correct me if I'm wrong on this. The guy I got it from never used it and I have never changed out major parts. What do the people that move these use. The hand feed could be applied through either a quick-action lever when drilling - or by a handwheel for fine feeds. It is up to the individual user to use good judgment and to safely operate old machinery. Lower the knee a few inches and the mill was ready to roll into the garage.
Sorry, I should have said this first. A slate bar is quite useful if you don't have a machine moving spoon. There are currently 28 Publication Reprint submissions for this manufacturer. Do you mean no extra's and all a base machine? The brideport is not on a pallet , and it is going in my garage , I had hoped to move it 15- 20' inside the garage. As a point of interest 3 different lengths of drawbar were used on the 2J2 head: 19. Nothing was cracked, broken, or missing. Lower the center of gravity if not already done.
Sorry I am so slow in responding to posts. Here are two links that support Randy's info about bridgeport serial numbers and determining the age of a mill. I've done it dozens of times per customer request. The mill itself is well documented by the serial number list we all have seen. To view and print Publication Reprints, you will need the Adobe Acrobat Reader installed on your computer. When the nut is loose, lift the drawbar out the top.
Whilst the specification of later versions of the head varied, originally it appears that a choice of two motors was offered: a single-speed 1 h. In fact, Gold Machinery had misidentified the spindle taper of my mill - when I bought it, I thought that it had a 2M taper that misidentification is my only complaint with Gold, by the way. It just happened to be my day off, so needless to say I was there in less than 30 minutes. These publications include old catalogs, manuals, parts list and historical documents for many manufacturers. Whatever you strap to, make sure it's locked. Here is a chart for model numbers on the knee to dates.
It was later crated up and stored until I purchased it. Then it's a simple matter of copy and paste. These cranes have wheels so once away from the trailer as you move this load out you lower it lower down. The counterbalanced R8 quill - hard-chrome plated and ground, then lapped to fit the honed spindle bore - had 5-inches travel and was fitted with both hand and power feeds. The mill went to the school as a new machine then went to the guy I bought it from and then to my house. And to answer the obvious question - no, the M head spindle can't be reground with an R8 taper.
Details are sketchy and, unfortunately, the maker's handbook almost useless in describing their functionality. The mill was originally configured with a Variable Speed head. I don't believe that's the serial number on the knee. The site is similarly disappointing. As soon as I learn how to post pics, I will. But we can work around that problem - no need to abandon the poor orphan M head because of that. Don't get home until dark 9-10ish , then it starts all over.