Surface/ Marking out plates

Surface/ Marking out plates

This topic has 7 replies, 7 voices, and was last updated 20 January 2021 at 20:05 by alan-lloyd.

Viewing 8 posts - 1 through 8 (of 8 total)

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20 January 2021 at 09:42 #16239
malcolm hearne
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@malcolmhearne84128
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20 January 2021 at 09:42 #521218
malcolm hearne
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@malcolmhearne84128
Can someone tell me why some surface/marking out plates are made with a surface that has been cut into raised squares with a ground finish as opposed to simply ground flat..

I have been given a large plate, 24" x !8" plate of this type and am wondering if it it is worth getting it reground. It would only need a lick over to restore its accuracy.

Malcolm Hearne
20 January 2021 at 09:49 #521219
Phil P
Participant
@philp
It sounds like you might have a lapping plate. The grooves are so that the lapping compound has somewhere to go.

Phil
20 January 2021 at 09:59 #521221
Howard Lewis
Participant
@howardlewis46836
+ 1 for a lapping plate.

Howard
20 January 2021 at 10:00 #521223
Tony Pratt 1
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@tonypratt1
lapping plate
20 January 2021 at 10:05 #521227
Bo’sun
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@bosun58570
Lapping plate for me too.
20 January 2021 at 19:52 #521356
mechman48
Participant
@mechman48
Lapping plate; sometimes come in circular shape.

George.
20 January 2021 at 20:05 #521359
alan-lloyd
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@alan-lloyd
Lapping plate, used to use one to lap knives for envelope machines
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