Mechanicboy
Well-Known Member
- Joined
- Jul 10, 2013
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Hi all people who own Chinese made semi-universal dividing head BS-0, BS-1, universal dividing head BS-2.
When I used the dividing head, I discovered that there were hard points in the bearing, the crank did not feel the same all the way. Then I noticed that the workpiece that was milled was not in the center since I use an adapter with ER-32 collet attached in dividing head.
So I measured with the dial on the cone inside the dividing head and discovered that it was a throw. Tried to adjust the thrust bearing without it helping, still slack in the spindle.
So I disassembled the dividing head and discovered the grease was rancid and hard mass.
Washed all parts clean and free of rancid grease. These bearings was checked and found to not be damaged. Note: Replace bearings if damaged or hard points in bearings. Greased with new wheel bearing grease that I have lying in my workshop room. So I adjusted the thrust bearing, but still slack. Found that the length of the shaft was a bit too long. So I put a 3 mm / 1/8" thick disc that I have turned to adjust between the adjusting nut and the thrust bearing. Then there was no slack and reduced throw in the spindle.
In other words, the Chinese grease that was used to lubricate the bearings and gears in the dividing head was of poor quality that turns rancid and hardens over time.
Encourages you to clean and lubricate with bearing grease in the chinese dividing head so the quality of dividing head will be better.
Regards Jens Eirik
When I used the dividing head, I discovered that there were hard points in the bearing, the crank did not feel the same all the way. Then I noticed that the workpiece that was milled was not in the center since I use an adapter with ER-32 collet attached in dividing head.
So I measured with the dial on the cone inside the dividing head and discovered that it was a throw. Tried to adjust the thrust bearing without it helping, still slack in the spindle.
So I disassembled the dividing head and discovered the grease was rancid and hard mass.
Washed all parts clean and free of rancid grease. These bearings was checked and found to not be damaged. Note: Replace bearings if damaged or hard points in bearings. Greased with new wheel bearing grease that I have lying in my workshop room. So I adjusted the thrust bearing, but still slack. Found that the length of the shaft was a bit too long. So I put a 3 mm / 1/8" thick disc that I have turned to adjust between the adjusting nut and the thrust bearing. Then there was no slack and reduced throw in the spindle.
In other words, the Chinese grease that was used to lubricate the bearings and gears in the dividing head was of poor quality that turns rancid and hardens over time.
Encourages you to clean and lubricate with bearing grease in the chinese dividing head so the quality of dividing head will be better.
Regards Jens Eirik
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