Surface/ Marking out plates

[malcolm hearneParticipant @malcolmhearne84128]

[malcolm hearneParticipant @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

[Phil PParticipant @philp]

It sounds like you might have a lapping plate. The grooves are so that the lapping compound has somewhere to go.

Phil

[Howard LewisParticipant @howardlewis46836]

+ 1 for a lapping plate.

Howard

[Tony Pratt 1Participant @tonypratt1]

lapping plate

[Bo’sunParticipant @bosun58570]

Lapping plate for me too.

[mechman48Participant @mechman48]

Lapping plate; sometimes come in circular shape.

George.

[alan-lloydParticipant @alan-lloyd]

Lapping plate, used to use one to lap knives for envelope machines

[Author]

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