Search found 1212 matches

by John Hasler
Fri Jun 28, 2019 4:46 pm
Forum: General Discussion
Topic: Reaming Cast Steel Fittings without a Mill
Replies: 27
Views: 1272

Re: Reaming Cast Steel Fittings without a Mill

Try a brake cylinder hone. Not a good idea. Honing is a slow process, not really intended for stock removal. And, unless a rigid type hone is employed, it will just ruin the parts (I'm making reference to the common spring loaded three stone hone). I suspect that if the hole saw with carbide insert...
by John Hasler
Fri Jun 28, 2019 9:36 am
Forum: General Discussion
Topic: Reaming Cast Steel Fittings without a Mill
Replies: 27
Views: 1272

Re: Reaming Cast Steel Fittings without a Mill

Try a brake cylinder hone.
by John Hasler
Thu Jun 27, 2019 8:33 am
Forum: General Discussion
Topic: NOGA knock offs
Replies: 7
Views: 701

Re: NOGA knock offs

It's also possible that the good ones have acme threads.

Those aluminum surfaces he ground the anodizing off of are going to wear rapidly.

Interesting design.
by John Hasler
Thu Jun 27, 2019 7:13 am
Forum: General Discussion
Topic: Water cooling a 12HP air cooled motor
Replies: 17
Views: 1236

Re: Water cooling a 12HP air cooled motor

Can you put a temperature sensor such as a thermistor or thermocouple in the windings? It could control your cooling and also warn you when to throttle back.
by John Hasler
Tue Jun 25, 2019 2:34 pm
Forum: Milling Machines
Topic: Bare Metal Protection
Replies: 16
Views: 3222

Re: Bare Metal Protection

Not all LED drivers contain electrolytic capacitors.
by John Hasler
Tue Jun 25, 2019 12:40 am
Forum: Lathes
Topic: Threading
Replies: 13
Views: 1016

Re: Threading

After assembling and clamping your block drill and tap a hole in the center of the bottom. Then screw your bolt into that hole and pour in the lead.
by John Hasler
Mon Jun 24, 2019 12:07 pm
Forum: Lathes
Topic: Threading
Replies: 13
Views: 1016

Re: Threading

I wrote: My non-damaging hammer has one lead face and one wooden face (and a wood handle). Can't beat it. Steve writes: Yes, but you can beat other things with it. I hadn't thought about replaceable lead faces. It would be simple enough to make a mold for it. I inherited a hammer with two wooden fac...
by John Hasler
Mon Jun 24, 2019 10:07 am
Forum: Lathes
Topic: Threading
Replies: 13
Views: 1016

Re: Threading

Harold writes: You might consider making a head that will accept Nupla Flex hammer head inserts. That will make a wonderful hammer that has the ability to use heads of various types of construction, yielding a non-damaging hammer with heads that are quickly replaced when needed. My non-damaging hamm...
by John Hasler
Sat Jun 22, 2019 11:01 am
Forum: General Discussion
Topic: Water cooling a 12HP air cooled motor
Replies: 17
Views: 1236

Re: Water cooling a 12HP air cooled motor

A 65 K temperature difference will drive 190 watts through 10 cm of that shaft (assuming carbon steel: most stainless alloys have lower conductivity). That doesn't account for the temperature drop from the windings to the shaft and the (very poor) coupling from the smooth, round shaft surface to the...
by John Hasler
Thu Jun 20, 2019 4:44 pm
Forum: General Discussion
Topic: Fed up With Crummy Rotary Tools
Replies: 18
Views: 1670

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 too...
by John Hasler
Thu Jun 20, 2019 9:56 am
Forum: Lathes
Topic: Newbie - Buying first metal lathe
Replies: 82
Views: 4735

Re: Newbie - Buying first metal lathe

Harold writes: Their idea of a pedestal grinder was, literally, a small grinder mounted on a post in the shop. I recently picked up a pedestal-mounted Wissota for $20 at a yard sale. Pedestal is still too short, but it's already better than bending over to use a bench grinder. Much quieter and smoot...
by John Hasler
Thu Jun 20, 2019 9:49 am
Forum: General Discussion
Topic: Fed up With Crummy Rotary Tools
Replies: 18
Views: 1670

Re: Fed up With Crummy Rotary Tools

SteveHGraham wrote:
Thu Jun 20, 2019 9:16 am
I noticed that people who bought Proxxons complained about the electronics failing.
Which model? I bought the IBS/E: the cheaper FBS 115E looks "entry level" (i.e. cheap) and the 12V units are right out.