Search found 767 matches

by BigDumbDinosaur
Sun Oct 09, 2016 4:07 pm
Forum: Lathes
Topic: Anyone still use center drill Holders
Replies: 14
Views: 3103

Re: Anyone still use center drill Holders

Hi all, just reading my old SB How To Run A Lathe book this AM. It mentions using a 'special center drill holder' instead of a three jaw drill chuck to hold center drills. Does anyone use these things these days? Are they significantly more accurate than modern tail stock drill chucks?? If so, wher...
by BigDumbDinosaur
Sun Oct 09, 2016 8:32 am
Forum: Build Log
Topic: Twin Piston Oil Pump Project
Replies: 40
Views: 10030

Re: Twin Piston Oil Pump Project

I assume by lubrication you are talking grease or heavy oil. Does steam oil on it count? Typically, motor oil or similar is used as a lubricant. Steam oil ought to work, especially considering the low speed operation the clutch will see, as long as the viscosity isn't too great. EP lubricants are a...
by BigDumbDinosaur
Sat Oct 08, 2016 11:26 pm
Forum: General Discussion
Topic: Another new machine -need a shop stretcher !!
Replies: 17
Views: 1715

Re: Another new machine -need a shop stretcher !!

WJH wrote:Do they make VFD's that take 220 input and spit out 440? That would be one option...
Such devices do exist but are quite inefficient. Better to use motors that can be run at the available line voltage.
by BigDumbDinosaur
Sat Oct 08, 2016 11:23 pm
Forum: Build Log
Topic: Twin Piston Oil Pump Project
Replies: 40
Views: 10030

Re: Twin Piston Oil Pump Project

I did order two 4mm Torrington Clutch assemblies. Not too impressed as they are very inconsistent and slip a piece of 4mm precision ground rod that came with them. What do you mean by "as they are very inconsistent"? Drawn-cup roller clutches (what I believe you are calling a "Torrington clutch") a...
by BigDumbDinosaur
Sat Oct 08, 2016 9:58 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 47599

EMD F7 in SCALE

EMD F7 in SCALE ———————————————— BODY CONSTRUCTION: Part I Constructing the body has been the most time-consuming part of this project to date, and the one aspect of it where I constantly encountered delays. Blunting speaking, a major part of the delay was caused by me getting involved with Bob Sni...
by BigDumbDinosaur
Thu Oct 06, 2016 12:41 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 47599

Re: EMD F7 in SCALE

Glenn Brooks wrote:Indeed a superb rendition of the real thing!
Thanks! It's my first-ever locomotive build and I'm trying to produce something reasonably presentable.
by BigDumbDinosaur
Thu Oct 06, 2016 12:34 am
Forum: Riding Scale Railroading
Topic: S-4 Fest
Replies: 52
Views: 16389

Re: S-4 Fest

This is a bump to an old topic. About a year ago... ...Bill, built and delivered the trucks under your locomotive. The body, $2k for everything was too light. I was going to build 5 of them. The other 4 backed out, you got the nose casting, end casting, my cost was $1k. Then I bought an O scale mode...
by BigDumbDinosaur
Tue Oct 04, 2016 2:35 pm
Forum: General Discussion
Topic: Toggle Switch for VFD Power Supply?
Replies: 21
Views: 2819

Re: Toggle Switch for VFD Power Supply?

Not knowing what I'm looking for, as lever switching bring up all manner of switches. I found this: DPST : 30-16867 20A@ 125V AC 15A@ 250 VAC 16 (6) A-125VAC T85 125A Peak Inrush Current Insulation Resistance: 100 Meg ohms. (Min.) Dielectric Strength: 1000V (Min.) Base Material: Nylon Actuator Mate...
by BigDumbDinosaur
Tue Oct 04, 2016 12:39 am
Forum: General Discussion
Topic: Toggle Switch for VFD Power Supply?
Replies: 21
Views: 2819

Re: Toggle Switch for VFD Power Supply?

I've been starting a air compressor that draws running 22-23 amp with a switch like linked above for the last 10 years or so. Mostly with the full starting load on the comp. However, the in-rush at initial power-on of a squirrel cage motor is nothing like the in-rush of a VFD whose capacitors are c...
by BigDumbDinosaur
Mon Oct 03, 2016 2:15 pm
Forum: General Discussion
Topic: I Need a Gear
Replies: 4
Views: 908

Re: I Need a Gear

Also, Browning. Their selection of gearing of all types is extensive.
by BigDumbDinosaur
Mon Oct 03, 2016 3:03 am
Forum: General Discussion
Topic: Toggle Switch for VFD Power Supply?
Replies: 21
Views: 2819

Re: Toggle Switch for VFD Power Supply?

I am still fooling with the box for my 3HP VFD. I was thinking it would be nice to have a switch on the hot 240 wire, so I could leave the VFD plugged in. I recommend you use a lever action motor disconnect. These devices usually accept standard cartridge fuses and are designed to withstand a subst...
by BigDumbDinosaur
Sun Oct 02, 2016 5:25 pm
Forum: 3-in-1 Metalworking Machines
Topic: 3 in 1
Replies: 10
Views: 5332

Re: 3 in 1

I've been largely unimpressed with 3-in-1 machines. Of course, if space constraints are severe you go with what will fit in the available space. However, I concur with the others that the lathe functions are okay, but the milling and drilling features tend to be mediocre.