Nope, it works just fine. John B From: HilmarM Sent: Monday, August 01, 2011 9:27 PM To: GrizHFMinimill@yahoogroups.com Subject: [GrizHFMinimill] What is going...
22310
pdxrobpotter
Aug 2, 2011 1:53 am
I'm relatively new to metal working, and I'm having some trouble getting a nice clean countersunk hole. I've been trying to use the same four-flute countersink...
22311
usarmyfly
Aug 2, 2011 2:42 am
I am also interested in a good technique for this. I have tried drill bits also to no avail. I am trying to countersink the slide stop hole in a pistol and...
22312
Dale E
dalee1002000
Aug 2, 2011 4:03 am
Hi, I prefer the single flute countersinks for steels myself. I often have trouble with the zero and multi-flute ones. Chatter can be caused by a number of...
22313
Robert Clark
robertclark209
Aug 2, 2011 4:34 am
I have had the same trouble, like Dale said the bit needs to eat slow but hard. Regards Robert From: pdxrobpotter <rob@...> ... I have had the same...
22314
ckinzer@...
trainliker
Aug 2, 2011 5:04 am
Single flute is all I use and at slowish speeds. If you use one of those hand deburring tools, you can see that slow and sharp gives a clean edge. Also, it...
22315
Keith Burton
keithburtonuk
Aug 2, 2011 5:05 am
My best results have been by use a 90degree spotting drill to start the hole and create the countersink before drilling through with a smaller drill. In UK,...
22316
Harvey White
madyn48
Aug 2, 2011 5:32 am
... I tend to use the multiple flutes variety, and a slow RPM with relatively heavy pressure. You can "peck" at it once you get the feel. I think that the...
22317
David / figNoggle Des...
fignoggle
Aug 2, 2011 6:20 am
i've found the best results come from the zero-flute type. it doesn't look like a "traditional" countersink. good luck! david -- Spindle-Lock For Your X3 And...
22318
rexarino
Aug 2, 2011 6:40 am
Try this, it sometimes helps" Center the countersink over the hole, then lay a thin cotton rag or typewriter paper over the hole and countersink through the...
22319
rexarino
Aug 2, 2011 6:43 am
Aaarrgh! wrong punctuation! Here's what I intended. Try this, it sometimes helps: Center the countersink Rex, also in Portland, Oregon...
22320
Brian Worth
electromodeler
Aug 2, 2011 7:10 am
Hi all, I have added a file to the group file section called "spot facing cutters". In the pdf, look at option "G". I have used different sizes of these for...
22321
johann_ohnesorg
Aug 2, 2011 10:41 am
How do you use it, freehand? In a cordless drill? Or in the mini mill? In the mini mill, give it a squirt of cutting oil, approx. 200 RPM and a lot of...
22322
pdxrobpotter
Aug 2, 2011 11:34 am
I've tried countersinking in the drill press with the object hand held, in the drill press with the object clamped, and in the mill (clamped, naturally). Any...
22323
David Wiseman
imagesdw
Aug 2, 2011 12:12 pm
Try this type of countersink: http://www.cromwell.co.uk/KEN0202100K Much better than the rose type which does work well in wood but we are working with metals....
22324
vickery757@...
vickery757...
Aug 2, 2011 4:15 pm
Hello I have been manufacturing simple brackets out of aluminum. I've been making cuts using a four flute end mill (3/8"). The end mill has become...
22325
Mark Wendt
wendtmk
Aug 2, 2011 4:19 pm
Lee, Use WD-40 or some other cutting fluid designed for aluminum. I'm assuming you're cutting the aluminum dry? If so, that will cause the end mill to clog. ...
22326
Barry Young
barryjyoung
Aug 2, 2011 4:37 pm
Just shy of 4,000 members, 22,000 messages, no we are not dead, we just slow way down in August. That happens to most hobby groups that do not stress outdoor ...
22327
Barry Young
barryjyoung
Aug 2, 2011 4:39 pm
Hi Rob in Portland: Try a good single flute countersink made by MA Ford. Turn it slow as you can and apply a firm feed. You will be fine. Barry in Tacoma ...
22328
Bill Williams
bwmsbldr
Aug 2, 2011 4:39 pm
... Excellent choice Johann! I do not think that you can make these countersinks chatter under ANY circumstances! Bill in Boulder...
22329
Richard
rwskinner123
Aug 2, 2011 7:54 pm
WD40 helps much, a 2 flute helps more because of the added clearance, and make sure you have your rpm correct. Richard ... From: vickery757@... To:...
22330
Dale E
dalee1002000
Aug 3, 2011 1:19 pm
Hi, WD-40 is a popular coolant/lube for machining aluminum, even if it's a bit expensive. But there are other coolants that will work as well. I have used TRIM...
22331
Jim E.
tbn501s
Aug 3, 2011 2:17 pm
Your problem is commonly referred to as "built-up edge" or BUE, where the workpiece material adheres to the cutting edge. I found the following articles...
22332
Richard
rwskinner123
Aug 3, 2011 2:34 pm
The 3 flute carbides from Maritool are freaking awesome. Richard ... From: Dale E To: GrizHFMinimill@yahoogroups.com Sent: Wednesday, August 03, 2011 8:19 AM ...
22333
redbaron192
redbaron192r...
Aug 3, 2011 4:26 pm
WD40 definitely helps but more important are good sharp cutting edges, particulary the outside corners which tend to round off after a lot of use. Dull edges...
22334
dougal_h
Aug 4, 2011 9:51 am
Hi I cut a lot of dry aluminium parts, many of these are cosmetic finish so I've had some practise getting clean cuts. Mostly on 6061 aluminium but also some...
22335
johann_ohnesorg
Aug 4, 2011 10:09 am
Dear Lee, increase feed and speed and cool the aluminum plates. Ask what it is when you buy it, there are extrusion aluminums that are very gummy, there are...
22336
samkex
Aug 7, 2011 5:51 am
Hi All, First posting here. No real questions yet. Just got my new mill mounted on the wheeled stand I built for it. Posted a couple pictures of it in my...
22337
artmarbles2
Aug 7, 2011 5:52 am
I've been lurking here for a while but I have to say this is really a great upgrade. I purchased a 120mm headlight LED ring off of Ebay that has 39 lights....
