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Recent content by CarbideTip

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    Excessive friction when threading in reverse, but not in forward

    I think this will be the same for a 10EE https://www.practicalmachinist.com/forum/threads/cva-toolroom-lathe-%E2%80%93-apron-rebuild.399861/post-3950464 (post #20) Also, removing the apron there may be an oil pipe to disconnect although ISTR that later 10EE's have a transfer port rather than...
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    10EE or CVA Apron Oil Pocket wadding

    Mike (m-lud), the CVA oil pocket is approximately 1.25” x 1.63” and about 7/32” deep at the deepest point. It looks like it’s just a cast feature. Apart from the pipe holes none of it has been machined. How does that compare with the 10EE? The pipes are all 5/32” OD and about 3/32” ID. Trial 1...
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    Excessive friction when threading in reverse, but not in forward

    Sorry to ask but have you got the feed reverse plunger in the central position? You shouldn't be able to engage the half nuts at all unless its in the middle, but I've seen a machine with the lower half-nut drive arm broken. Under these conditions the interlock won't work and you'd only be using...
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    CVA Toolroom Lathe – Apron Rebuild

    With the oil pipes completed the half-nuts can be fitted. Reassembly is very straightforward but don’t forget the two sprung detents. One for the half nuts and one for the feed reverse plunger. On the front of the apron there’s a chromed bezel and operating lever secured with a taper pin...
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    CVA Toolroom Lathe – Apron Rebuild

    Thanks for the kind words Mike.
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    CVA Toolroom Lathe – Apron Rebuild

    The delivery pipe from the pump goes to a T piece. On CVA's this is held on by a single screw at an odd angle. For testing I have temporarily blanked the outlet that will eventually go to the saddle. With the pump and pipe in place the apron sump can be fitted. I made a gasket although there...
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    Ultimate CVA/ 10EE Drive

    When needs must!! No heavy cuts tho! On balance I'll stick with my 4HP but you get the innovation prize.
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    10EE or CVA Apron Oil Pocket wadding

    Thanks for the replies folks. When the apron came apart there was a congealed mass in that pocket that I discarded without examination. With hindsight I should have studied it! Sorry, I should also clarify: The picture I posted is from a spare apron that has been cannibalised for parts. The...
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    10EE or CVA Apron Oil Pocket wadding

    Can anyone tell me what material I should be putting in here: I've searched and seen cotton waste mentioned. What is the function of this? Flow restriction? Any help appreciated. Martin.
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    CVA Toolroom Lathe – Apron Rebuild

    Yes, I would think you'll have the earlier type of pump. I do wonder if the earliest CVAs were fitted with Bijur lubrication. Let us know what you find.
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    Full tear down and Rebuild of a 10EE Round Dial

    Dave: Cross-slide thrusts on CVAs are FT7/16. 7/16" ID 7/8" OD and 1/4" wide - Can someone say whether these are the same dimensions as 10EE's? https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=FT7%2F16+thrust&_sacat=0
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    CVA Toolroom Lathe – Apron Rebuild

    With all the shafts and gears in place the next thing to go back is the oil pump. Well perhaps ‘back’ is the wrong word since mine had no oil pump at all when I received it. At some point in it’s previous life the pump had been removed. Because the apron had suffered coolant damage it may be...
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    CVA Toolroom Lathe – Apron Rebuild

    Continued from last post. Next to be fitted is the clutch for the cross-feed. This is essentially the same procedure as for the longitudinal clutch, but there are two more oil feed pipes that need to be fitted into the well first. One will feed the clutch and the other feeds the shaft with the...
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    CVA Toolroom Lathe – Apron Rebuild

    I discovered that a shim washer was needed to prevent the back face of the large clutch gear rubbing against the edge of the housing. I can not really explain why both long and cross feed clutches were like this, yet those from the spare apron were not. Because the gear had been rubbing there is...
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    CVA Toolroom Lathe – Apron Rebuild

    Replacing the apron internals, continued. Next to be refitted is the longitudinal feed clutch. Here are the component parts with the original thrust bearings. Unlike round dial10EE’s there is no need to put the large rack shaft gear in position before fitting the clutch. The apron castings...
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