On 10 Sep 2014 06:06:41 -0700, you wrote:
Subject says it all. I will be using HSS sharp tooling (or do I need a radius?) and I need a good finish but does not need to be perfect. I assume like ali the fastest speed on the spindle will be required?
Boxford model B and I think I have all the needed change wheels to get the finest feed on the chart. I have a really fine feed now made up from some esoteric set of change wheels which I am happy to get rid of as its very slow.
Acetal recommended cutting speeds and feeds are
Acetal 20% glass HSS tooling 338 Feet per Minute .016 inch depth of cut
Carbide 750 FPM at .024 DOC
Insert 1290 FPM at .3 DOC
Acetal - copolymer HSS 363 FPM at .017 DOC
Acetal - homopolymer HSS 375 FPM at .017 DOC
Carbide and Insert - same FPM and DOC for all types.
So for instance turning a 1" diameter gives
MATERIAL= Acetal - 20% Glass
SURFACE SPEED= 338 FPM
CUTTING TOOL MATERIAL= HSS
NOMINAL STOCK DIAMETER= 1 inches 25.4 mm
DEPTH OF PASS= 0.016 inches
SPINDLE SPEED= 1312 RPM
FEEDRATE= 10.28608 IPM 0.00784 IPR 261.26643 mmPM 0.19914 mmPR
MATERIAL REMOVAL RATE= 0.50878 in³/min
MATERIAL POWER CONSTANT= 0.35
REQUIRED HORSEPOWER= 0.2095
Steve Blackmore
--
------------------------------------
Posted by: Steve Blackmore <
steve@pilotltd.net>
------------------------------------
------------------------------------
Yahoo Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/sheetcam/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/sheetcam/join
(Yahoo! ID required)
<*> To change settings via email:
sheetcam-digest@yahoogroups.com
sheetcam-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
sheetcam-unsubscribe@yahoogroups.com
<*> Your use of Yahoo Groups is subject to:
https://info.yahoo.com/legal/us/yahoo/utos/terms/