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Pultra thrust bearing

Unusual type

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david bennett 8	30/10/2022 18:31:07
245 forum posts 19 photos	Most Pultra 1750/70 lathe headstocks seem to have ball-race thrust bearings.Occasionally I come across a thrust bearing that is a solid hard steel thrust collar splined to the spindle shaft. Does anyone have more info such as- is it just an early version? I have seen a suggestion that it may be for the high speed headstock.
Dell	02/11/2022 08:50:10
230 forum posts 44 photos	My understanding is the early Pultra had solid thrusts and later ones had ball thrusts. Dell
david bennett 8	02/11/2022 17:04:10
245 forum posts 19 photos	Posted by Dell on 02/11/2022 08:50:10: My understanding is the early Pultra had solid thrusts and later ones had ball thrusts. Dell Thanks Dell. Just to clarify, you are referring to the early 17-series? I know the "P" type all had solid thrusts. Dave
Dell	06/11/2022 08:12:33
230 forum posts 44 photos	Posted by david bennett 8 on 02/11/2022 17:04:10: Posted by Dell on 02/11/2022 08:50:10: My understanding is the early Pultra had solid thrusts and later ones had ball thrusts. Dell Thanks Dell. Just to clarify, you are referring to the early 17-series? I know the "P" type all had solid thrusts. Dave Yes 17/50 17/70 not sure about the 15 series though also don’t know when the change happened, my Pultra is post WW2 and it has ball bearing thrust. Dell

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