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Anyone Know What This Is And/or Used For?
- Thread starter Chippy
- Start date
A
Andre
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Engraving machine (or pantograph mill) table?
- Joined
- Jul 9, 2014
- Messages
- 622
The keyways with the teeth and the worm gear on the sliding blocks that are engaged in/on the teeth . ( jigs I'll call them for now )
I think they are to keep whatever us being lapped in ..... in the same plane ie. no accidental or unintentional rotation .
It would then be a simple exercise to lift off & rotate the lapped part/s & set them back on the " jigs " either through 90 , 180 or 270 degrees to get a decent flat polished lapped surface .
Lapping in like that would be about the quickest & most accurate way if your doing it by hand .
The criss crossed diamond groves will most likely be there to allow fine ground off debris & the used lapping paste to fall into them as quick as possible to stop it causing problems on the metal plate & whatever is being ground /lapped flat . Think jewelers rouge for the lapping paste , it's just a really really fine grit & some oil .
Perhaps see if you can find info & pictures for a lapping plate for optical quality glass prisms , possibly for use as military tank / armoured fighting vehicle periscopes or the mechanical range finding binocular type devices / scopes that were in use till the 1970's or so before TTL & digital electronic technology replaced them .
I think they are to keep whatever us being lapped in ..... in the same plane ie. no accidental or unintentional rotation .
It would then be a simple exercise to lift off & rotate the lapped part/s & set them back on the " jigs " either through 90 , 180 or 270 degrees to get a decent flat polished lapped surface .
Lapping in like that would be about the quickest & most accurate way if your doing it by hand .
The criss crossed diamond groves will most likely be there to allow fine ground off debris & the used lapping paste to fall into them as quick as possible to stop it causing problems on the metal plate & whatever is being ground /lapped flat . Think jewelers rouge for the lapping paste , it's just a really really fine grit & some oil .
Perhaps see if you can find info & pictures for a lapping plate for optical quality glass prisms , possibly for use as military tank / armoured fighting vehicle periscopes or the mechanical range finding binocular type devices / scopes that were in use till the 1970's or so before TTL & digital electronic technology replaced them .
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the diagonal slots across the face makes it a lapping plate. I have used lots of cast iron laps, most had the same type of slots. I think they are for helping the lapping compound distribute across the lap better also to have someplace for the grinding debris to go just my opinion. I have made laps for lapping relief valves seats with zero leakage these laps small were tuned up on laps with cross hatch lines. what someone did to it after that I have no idea. bill
