In the original Bridgeport J head top assembly (image below) where the bearing open or did they have shields?
I can see that the V step pulley bearing pair (items number 5) in the image below may have had shields as it would not have been in an oil bath and there is no way to add lubrication. Would these bearings have a shield on both sides of each bearing or would only the side of the bearing that is on the exterior of assembly be shielded? If these bearings have only a shield on the exterior side of the assembly then what kind and how much grease should be in the middle of the assembly to lubricate the bearings?
What about the bearing assembly on bull gear hub (items61) and the bearings for the bull gear counter shaft (items 51). When this head came from the Bridgeport factory did these bearings have shields? I am thinking that from Bridgeport that these bearings would be open and swimming in an oil bath. The bath being replenished by adding Vactra Heavy/Medium oil through the assemblies Gits cup. It seems that on many of this assemblies rebuilds bearings with shields are used. If bearings with shields are used then are there shields on both sides of the bearings or does only the bearing side external on the assembly have a shield? If both sides of each bearing are shielded then I would think no additional lubrication is necessary. If only one side of each bearing is shielded then what kind and how much grease is to be added in the middle of the bearing pair assembly? If grease is used to lubricate this bearing pair then I would think you would also grease the bull gear teeth and bull gear counter shaft teeth. If grease is used to lubricate the bearings and bull gear then I imagine oil no longer needs to be added to the Gits cup (item 47). This Gits cup could be turned upside down or removed on reassembly.
Does anyone have answers to my questions or opinions they wish to express on this subject?
Thank you,
Vlad
http://www.machinerypartsdepot.com/store/1478157/page/552090
I can see that the V step pulley bearing pair (items number 5) in the image below may have had shields as it would not have been in an oil bath and there is no way to add lubrication. Would these bearings have a shield on both sides of each bearing or would only the side of the bearing that is on the exterior of assembly be shielded? If these bearings have only a shield on the exterior side of the assembly then what kind and how much grease should be in the middle of the assembly to lubricate the bearings?
What about the bearing assembly on bull gear hub (items61) and the bearings for the bull gear counter shaft (items 51). When this head came from the Bridgeport factory did these bearings have shields? I am thinking that from Bridgeport that these bearings would be open and swimming in an oil bath. The bath being replenished by adding Vactra Heavy/Medium oil through the assemblies Gits cup. It seems that on many of this assemblies rebuilds bearings with shields are used. If bearings with shields are used then are there shields on both sides of the bearings or does only the bearing side external on the assembly have a shield? If both sides of each bearing are shielded then I would think no additional lubrication is necessary. If only one side of each bearing is shielded then what kind and how much grease is to be added in the middle of the bearing pair assembly? If grease is used to lubricate this bearing pair then I would think you would also grease the bull gear teeth and bull gear counter shaft teeth. If grease is used to lubricate the bearings and bull gear then I imagine oil no longer needs to be added to the Gits cup (item 47). This Gits cup could be turned upside down or removed on reassembly.
Does anyone have answers to my questions or opinions they wish to express on this subject?
Thank you,
Vlad
http://www.machinerypartsdepot.com/store/1478157/page/552090