Search found 1426 matches

by Russ Hanscom
Wed May 15, 2019 9:46 am
Forum: Milling Machines
Topic: Gear Cutting
Replies: 9
Views: 717

Re: Gear Cutting

Several options; depending on the size and specifics of the gears you are making. One has been mentioned. Another is to take round rod and cut multiple gears on it them part them off, Use a set of soft jaws for boring and finishing the gears. Yes, you can stack multiple blanks on a mandrel and cut t...
by Russ Hanscom
Mon May 13, 2019 8:59 pm
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 775

Re: Hyperboloid of revolution twirler

Correct, you only have to do one quadrant and then mirror to get the other three.

After looking at the project and reviewing math definitions, I am pretty sure what is shown is a parabolic curve, not hyperbola - at least that is the equation I would start with.
by Russ Hanscom
Mon May 13, 2019 8:17 am
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 1227

Re: Amazing machine work

Possibly getting off topic, but after the war, the V-12 aircraft engines were used for industrial purposes. Hollywood studios use them to drive generators for arc lights for night time filming and the oil industry used them to drive large high pressure portable pumps. There was an outfit in Long Bea...
by Russ Hanscom
Sun May 12, 2019 7:24 pm
Forum: General Discussion
Topic: VFD question
Replies: 31
Views: 1873

Re: VFD question

Might be a plan; buy a junk forklift and salvage the motor, controls, and battery.
by Russ Hanscom
Sun May 12, 2019 4:26 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 1227

Re: Amazing machine work

Almost twins; but the brits had the edge.
by Russ Hanscom
Sun May 12, 2019 12:54 pm
Forum: General Discussion
Topic: VFD question
Replies: 31
Views: 1873

Re: VFD question

Also remember that electrical HP and engine HP are not quite the same animal. An engine rated at X hp rarely delivers that except under optimal conditions, so a 10 HP electric may be more than ample. No engineering reason that your goal cannot be met except that the power conversion you desire is no...
by Russ Hanscom
Sat May 11, 2019 9:54 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 1227

Re: Amazing machine work

Those look suspiciously like Allison parts! Used to have one of those in my garage - just because.
by Russ Hanscom
Sat May 11, 2019 2:19 pm
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 775

Re: Hyperboloid of revolution twirler

Do an internet search, lots of examples there.
by Russ Hanscom
Fri May 10, 2019 6:39 pm
Forum: Live Steam
Topic: Rectangular cotter holes
Replies: 9
Views: 890

Re: Rectangular cotter holes

True, and I have a shaper, but for more than a few, the punch is better for this application. The HSS punch leaves a good finish in the slot, and I can make one every two minutes once organized; and I need 50+. If they were too pretty, they would not be authentic.
by Russ Hanscom
Fri May 10, 2019 8:27 am
Forum: Live Steam
Topic: Rectangular cotter holes
Replies: 9
Views: 890

Re: Rectangular cotter holes

So there are other users.

One way to get smooth entry and exit holes would be to start with a rod one size larger then turn down the outside after punching the hole.; but not necessary for common freight equipment.
by Russ Hanscom
Thu May 09, 2019 11:58 am
Forum: Live Steam
Topic: Rectangular cotter holes
Replies: 9
Views: 890

Rectangular cotter holes

RRs are not always know for the simple approach, why have a round cotter hole when it is so much more challenging to have rectangular ones. A hundred plus years ago, some party in authority at the D&RG narrow gauge had the strange idea to use rectangular cotters. Not sure if any other RR did this, I...
by Russ Hanscom
Wed May 08, 2019 5:53 pm
Forum: Milling Machines
Topic: Next step to learn wheel cutting
Replies: 6
Views: 629

Re: Next step to learn wheel cutting

The workbooks mentioned show how to make your own cutters, very little use of commercial cutters. You can make either fly cutters or regular multi tooth cutters.