The frequency that I am lapping the crystals upto is 20 MHz and the
average spread observed is around 200 KHz,
This frequency spread is the difference in the frequency between the
highest frequency crystal and the lowest frequency crystal obtained out
of one batch of crystals i.e. when few hundred crystals were lapped
together the highest frequency crystal observed was of 20,150,000 Hz =
20.15 MHz while the lowest frequency crystal was around 19,950,000 Hz =
19.95 MHz thereby giving a spread of 200 KHz.
I hope its very clear now.
My target is to bring this spread below 50 KHz.......I want some help
Please....

Thank you very much for your time
Pankaj Trivedi