Antique German lathe. Headstock
It is told about the headstock of an old German lathe. On my channel there is also a video about this machine.
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"Old German Lathe":
• Старинный немецкий токарный станок
“Machine tools. Repair and improvements. Modernization":
• Станки. Ремонт и доработки. Модернизация
"Tool. Tool sharpening ":
• Самодельный инструмент. Затачивание и...
“Products from balls. Working with balls ":
• Изделия из шаров. Работа с шарами
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Address of this video:
• Старинный НЕМЕЦКИЙ ТОКАРНЫЙ станок. П...
The diameter of the inner bore of the spindle is 23 mm.
M52x3 thread is cut at the end of the spindle.
Center height 175 mm.
The drive pulley has 4 grooves.
The headstock body is cast iron. A sleeve bearing is inserted at the front, and a duplex rolling bearing at the rear.
The body has two M8 holes for grease fittings.
At the bottom of the headstock there are two M16 threaded sockets, into which the studs are screwed. With the help of these pins, the headstock is attracted to the bed.
The spindle has two landing collars for a lathe chuck. The main landing belt, as usual, and at the very end - the second landing belt.
That is, the adapter flange of the lathe chuck, when screwed onto the spindle, is centered along two belts. This is done for greater rigidity of the installation of the chuck. Although this complicates the manufacture of the adapter flange.
Collets with a body diameter of 23 mm can be installed in the spindle.
The transfer of torque from the pulley to the spindle was done poorly - with the help of an M10 screw with a tapered end, which goes into a shallow hole in the spindle.
When transmitting torque, the screw cone crushes the spindle material in the hole, the material floats. And the diameter of the spindle in this place increases, and the pulley wedges. The cog, of course, also crumples.
At the first disassembly, I knocked the spindle out of the pulley with a sledgehammer at my own peril and risk. I was afraid that the cast-iron body of the headstock would not stand it.
In an amicable way, there should be a simple keyed connection, like the counter drive of this machine. There are even two such key connections.
The spinel rotates in two bearings. The front bearing is sliding and the rear is rolling.
The bronze front plain bearing fits snugly into the headstock bore. A pin is pressed into its lower part - from turning. The pin fits into a groove that is located in the hole in the headstock.
There are threads on both ends of the bearing, onto which nuts are screwed.
The nuts are designed for fastening the bearing in the headstock. The same nuts are used to adjust the position of the bearing in the axial direction, which means that the radial clearance between the spindle and the bearing is adjusted.
For such adjustment, the spindle neck under the front bearing is tapered. Taper 2 degrees. And, accordingly, the hole in the front bearing is tapered.
The other bearing, the rear one, is a rolling bearing. It is similar to a double angular contact bearing called a duplex. Unlike a duplex bearing, this bearing has one common inner race.
The sleeve bearing is lubricated through a filler nipple with a cap. And the rolling bearing is lubricated through a grease gun.
The lubrication system differs from the lubrication system for sliding bearings in widespread lathes, such as S-1, T-65, TV-16, MN-80, Shaublin-90:
• СМАЗКА ПОДШИПНИКОВ часовых станков на...
Here is such a headstock at an old German machine.