05-26-2018, 08:16 PM
No there is nothing wrong with buying second hand measuring instruments as long as they are in fairly good condition and haven't been abused by previous owners.
1) Thimble rotates smoothly and can travel the full distance of it's capacity.
2) Condition of the faces on both the spindle and anvil. Clean and smooth. No chipped, pitted or heavily scratched surfaces.
3) Missing parts. Used micrometers are commonly found with the ratchet knob missing if they were so equipped originally.
4) Alignment of the faces. They should be perfectly in line with each other. If the spindle is slightly off center from the anvil, there is something bent and those should be avoided.
There are plenty of good used micrometers out there to be had for the fraction of the cost of a new one. You can afford to take your time in picking out a good one. They are out there.
1) Thimble rotates smoothly and can travel the full distance of it's capacity.
2) Condition of the faces on both the spindle and anvil. Clean and smooth. No chipped, pitted or heavily scratched surfaces.
3) Missing parts. Used micrometers are commonly found with the ratchet knob missing if they were so equipped originally.
4) Alignment of the faces. They should be perfectly in line with each other. If the spindle is slightly off center from the anvil, there is something bent and those should be avoided.
There are plenty of good used micrometers out there to be had for the fraction of the cost of a new one. You can afford to take your time in picking out a good one. They are out there.
Willie