Search found 1739 matches

by Mr Ron
Thu Jun 20, 2019 3:00 pm
Forum: General Discussion
Topic: Fed up With Crummy Rotary Tools
Replies: 18
Views: 526

Re: Fed up With Crummy Rotary Tools

My 1995 Dremel tolerated lateral loads just fine. It still would, if it ran. Dremels are supposed to tolerate lateral loads. Nearly all of the burrs, bits, brushes, and stones are used with lateral force. A Dremel that couldn't take lateral force would be of no use at all. The switch on mine failed...
by Mr Ron
Thu Jun 20, 2019 2:58 pm
Forum: General Discussion
Topic: Fed up With Crummy Rotary Tools
Replies: 18
Views: 526

Re: Fed up With Crummy Rotary Tools

I wouldn't buy a Proxxon. In the latest Micro Mark catalog, their Proxxon 16" scroll saw is selling for $189.99, reduced from $237.45. If you look closely, it is identical to a Harbor Freight or Wen scroll saw that sells for less than $100. It does come with a flexible shaft attachment. Proxxon tool...
by Mr Ron
Thu Jun 20, 2019 10:31 am
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 656

Re: Turning plastic on a metal lathe

I tried drilling a 3/4" hole in the UHMW using a 3/4", 2 flute, HSS end mill in scrap material and it cut like butter, so that is the route I'll be taking. I also drilled some 1/4" holes with a brad point drill and that cut cleanly. Tried a forstner bit and that didn't go so well; required a lot of ...
by Mr Ron
Thu Jun 20, 2019 10:23 am
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 656

Re: Turning plastic on a metal lathe

NP317 wrote:
Sun Jun 16, 2019 10:32 am
One plastic to be careful when machining:
PVC.
It can off-gas chlorine which will quickly rust any exposed metal surfaces.
I always prep the machines by applying a coating of oil for protection.
It wipes clean when the job in done.
~RN
Thanks for the heads up. Who would have thought.
by Mr Ron
Thu Jun 20, 2019 10:18 am
Forum: General Discussion
Topic: Fed up With Crummy Rotary Tools
Replies: 18
Views: 526

Re: Fed up With Crummy Rotary Tools

You are placing a lateral load against a ball bearing that is turning at 30,000 rpm. You can't expect a $100 tool to stand up to that kind of force forever. The same is true of any other brand of tool. More money means better bearings.
by Mr Ron
Mon Jun 17, 2019 8:30 pm
Forum: The Junk Drawer
Topic: Harbor Freight Circular Saw Sharpener
Replies: 8
Views: 1088

Re: Harbor Freight Circular Saw Sharpener

The HF saw blade sharpener can only do a face grind, which is OK for a touch-up. A true saw blade sharpener (I have one) can also do a side grind and is adjustable for alternate top bevel (ATB). When a carbide tip is damaged or has come off, it must be replaced and that requires a complete grind; to...
by Mr Ron
Mon Jun 17, 2019 10:17 am
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 656

Re: Turning plastic on a metal lathe

On a similar note, what is the best drill for plastic? I have twist drills, forstener bits and brad point bits. Which will give the cleanest hole and not distort the hole? The material I'm drilling through is UHMW, 0.416" thick.
by Mr Ron
Sat Jun 15, 2019 11:31 pm
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 656

Turning plastic on a metal lathe

Over on a woodworking forum, I frequent, a question was raised about turning wood on a metal lathe. The answers were obvious; sawdust and oil don't mix, metal lathes are too slow for wood turning, etc. I want to turn some UHMW on my lathe, but now I ask you; are plastic cuttings harmful for a metal ...
by Mr Ron
Thu Jun 13, 2019 10:28 am
Forum: General Discussion
Topic: Drill press recommendations?
Replies: 9
Views: 402

Re: Drill press recommendations?

A drill press is a simple, straight forward machine that hasn't changed in over a hundred years. That said, I would look for an old DP, not a new one. I have an old Delta that was built in 1939 and is as good as new today. I use it almost every day. I got it for free, but there are lots of old DPs i...
by Mr Ron
Tue Jun 11, 2019 1:55 pm
Forum: Lathes
Topic: Newbie - Buying first metal lathe
Replies: 65
Views: 1816

Re: Newbie - Buying first metal lathe

It depends on what kind of work you want to do. A hobbyist that builds small models would find the mini lathe well suited. For serious work on larger projects, like building a live steam locomotive, a larger 12" lathe with a quick change gear box is really needed. It might be noted that the famous J...
by Mr Ron
Wed May 29, 2019 8:03 am
Forum: General Discussion
Topic: Drilling UHMW
Replies: 6
Views: 799

Re: Drilling UHMW

Sometimes I just press the work against the chuck jaws. The UHMW is probably too slick for that to work. Some people face off a blank, then cut some circular grooves in the face and then attach the work to the blank with super glue. The grooves provide space for excess glue. After machining the wor...
by Mr Ron
Tue May 28, 2019 4:12 pm
Forum: General Discussion
Topic: 100+ Years ago
Replies: 22
Views: 2329

Re: 100+ Years ago

I wonder how many millions of pounds (tons?) of spent shell casings were left on the battlefields of he world. Did anyone try to reclaim them after the war? or was it considered not worth the effort? It boggles the mind to think when a cargo ship was sunk with hundreds of tanks, jeeps, trucks, etc, ...