After calculating the speed and feed for an application do you rapid back
out, or do you retract at the same feed rate as you plunge?




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On Friday, January 17, 2014 10:53:22 AM UTC-8, Bob La Londe wrote:
After calculating the speed and feed for an application do you rapid back

out, or do you retract at the same feed rate as you plunge?









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Rapid out.

jon_banquer fired this volley in news:15e12c16-1f5b-
:

Rapid out.

Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of
misalignment between tailstock and headstock will translate to the reamer's
taking more cuts as it exits. You can't completely eliminate that, but you
can minimize it by getting out of the hole as fast as possible.

If everything were perfect, it wouldn't do any cutting on the way out,
anyway, so the speed wouldn't matter. But it does.

Lloyd

On Friday, January 17, 2014 11:44:57 AM UTC-8, Lloyd E. Sponenburgh wrote:
jon_banquer fired this volley in news:15e12c16-1f5b-

:



Rapid out.



Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of

misalignment between tailstock and headstock will translate to the reamer's

taking more cuts as it exits. You can't completely eliminate that, but you

can minimize it by getting out of the hole as fast as possible.



If everything were perfect, it wouldn't do any cutting on the way out,

anyway, so the speed wouldn't matter. But it does.



Lloyd


Use a G86 boring cycle: Feedrate, Stop, Dwell Time, Rapid out.

On Friday, January 17, 2014 11:44:57 AM UTC-8, Lloyd E. Sponenburgh wrote:
jon_banquer fired this volley in news:15e12c16-1f5b-

:



Rapid out.



Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of

misalignment between tailstock and headstock will translate to the reamer's

taking more cuts as it exits. You can't completely eliminate that, but you

can minimize it by getting out of the hole as fast as possible.



If everything were perfect, it wouldn't do any cutting on the way out,

anyway, so the speed wouldn't matter. But it does.



Lloyd



Suggest looking into floating reamer holders.

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of
misalignment between tailstock and headstock will translate to the
reamer's
taking more cuts as it exits. You can't completely eliminate that, but
you
can minimize it by getting out of the hole as fast as possible.

If everything were perfect, it wouldn't do any cutting on the way out,
anyway, so the speed wouldn't matter. But it does.

Lloyd

Don't you run the risk of a deep spiral score mark that way?




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On Friday, January 17, 2014 1:20:26 PM UTC-8, Bob La Londe wrote:
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message

. 3.70...

Yeah. If the reamer is sharp and you dawdle in the hole, any tiny bit of

misalignment between tailstock and headstock will translate to the

reamer's

taking more cuts as it exits. You can't completely eliminate that, but

you

can minimize it by getting out of the hole as fast as possible.



If everything were perfect, it wouldn't do any cutting on the way out,

anyway, so the speed wouldn't matter. But it does.



Lloyd



Don't you run the risk of a deep spiral score mark that way?









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Are these thru holes?

You want no risk use an M00 so you can check and if necessary clean the reamer by hand before you retract it from the hole.

"Bob La Londe" fired this volley in news:lbc6r1$8ou$1
@dont-email.me:


Don't you run the risk of a deep spiral score mark that way?

Spiral, yes. Deep, no. It's better to have a steep spiral than one that
eats out more i.d.

Lloyd