Hello all! My first post.
I recently purchased a Hardinge HLV-H that I am rebuilding and had a quick question about the markings on the spindle and how they should be interpreted for the bearing install. I've done a lot of searching on the internets and have seen photos of the similar markings but nothing to indicate what they are for and how they should be used for new spindle bearing installation or repacking the old bearings and putting them back in. It was built in 1970 and is an HLV-H. I have read Gunners documentation and step by step guide which will prove to be very useful and is well done. I've also read AAFRadio's doc that I believe incorporated more specific HLV-H info into gunners doc. Here are some pics of the numbers I'm referring to. I have been meticulous about taking photos on how things are coming apart when disassembled but didn't capture how the bearings were aligned on the spindle and in the recess. My first go around with rebuilding a Hardinge so I dropped the ball but hopefully it is a good teaching moment for me as well as others.
1.) Bearing spacer has 9-28 written and engraved on it.
2.) Front bearing recess in the headstock has 9-28 engraved/etched just above the back wall of the bearing recess on a chamfer at about the 5 0'clock position if looking over the tailstock at it.
3.) there is what I believe to be a 9 (could be a 6) located at the 12 o'clock position at the front of the headstock engraved/etched. Done the same as the one mentioned in #2 just a different position.
4.) The spindle has 2 numbers etched into it. closest to the nose where the workpiece would be is a 9. with a line over top of it.
5.) Near the end of the spindle closest to the collet closer handle would is an 8. that is inline with where the number in 4 is etched.
6.) the matched bearings have the factory indicator marks showing how they should be aligned when assembled (zero with a line through it).
they also have etched dots on the inner and outer races which I'm assuming should align with a point on the spindle shaft(inner race dot) and the headstock bearing recess (outer race dot)
I'm guessing these etched numbers are some sort of run out or high spots on the spindle in microns probably?
I'm just trying to get an idea of what should line up where during reassembly.
Thanks for any advise that can be provided. I take pride in doing the job right and not just doing a rustoleum style restore so I may be overthinking it. Standing by for my thrashings!
Regards,
//Chip
I recently purchased a Hardinge HLV-H that I am rebuilding and had a quick question about the markings on the spindle and how they should be interpreted for the bearing install. I've done a lot of searching on the internets and have seen photos of the similar markings but nothing to indicate what they are for and how they should be used for new spindle bearing installation or repacking the old bearings and putting them back in. It was built in 1970 and is an HLV-H. I have read Gunners documentation and step by step guide which will prove to be very useful and is well done. I've also read AAFRadio's doc that I believe incorporated more specific HLV-H info into gunners doc. Here are some pics of the numbers I'm referring to. I have been meticulous about taking photos on how things are coming apart when disassembled but didn't capture how the bearings were aligned on the spindle and in the recess. My first go around with rebuilding a Hardinge so I dropped the ball but hopefully it is a good teaching moment for me as well as others.
1.) Bearing spacer has 9-28 written and engraved on it.
2.) Front bearing recess in the headstock has 9-28 engraved/etched just above the back wall of the bearing recess on a chamfer at about the 5 0'clock position if looking over the tailstock at it.
3.) there is what I believe to be a 9 (could be a 6) located at the 12 o'clock position at the front of the headstock engraved/etched. Done the same as the one mentioned in #2 just a different position.
4.) The spindle has 2 numbers etched into it. closest to the nose where the workpiece would be is a 9. with a line over top of it.
5.) Near the end of the spindle closest to the collet closer handle would is an 8. that is inline with where the number in 4 is etched.
6.) the matched bearings have the factory indicator marks showing how they should be aligned when assembled (zero with a line through it).
they also have etched dots on the inner and outer races which I'm assuming should align with a point on the spindle shaft(inner race dot) and the headstock bearing recess (outer race dot)
I'm guessing these etched numbers are some sort of run out or high spots on the spindle in microns probably?
I'm just trying to get an idea of what should line up where during reassembly.
Thanks for any advise that can be provided. I take pride in doing the job right and not just doing a rustoleum style restore so I may be overthinking it. Standing by for my thrashings!
Regards,
//Chip