Search found 5054 matches

by Bill Shields
Sun May 11, 2008 6:00 pm
Forum: General Discussion
Topic: VFD Help
Replies: 13
Views: 3247

Disconnect

Generally, it is not a good idea to cut the cable between the drive and the motor when the motor is spinning. While this often goes unsaid, take a look at any of the provided schematics and see if there is a switch shown anywhere between the VFD and the motor. I know one fellow on another board who ...
by Bill Shields
Sun May 11, 2008 5:55 pm
Forum: Lathes
Topic: Newbie Question about SB9
Replies: 5
Views: 854

Cross Slide

Getting a replacement cross slide isn't all that much work - as mentioned above, there are many for sale here and there. the big question is - is it a model A, B or C? A has the QC gearbox and drives on X and Z and feeds for threading B has change gears and drives on X and Z feeds and threading C ha...
by Bill Shields
Sun May 11, 2008 5:50 pm
Forum: Milling Machines
Topic: For those looking for a small knee mill
Replies: 12
Views: 1822

HH

They are nice machines, but a little bit small for much of the work many of us do.

For what the bidding is up to. you can get a good used full-size knee mill, with tooling and probably a DRO.
by Bill Shields
Sun May 11, 2008 5:38 pm
Forum: Lathes
Topic: Broken Centerdrill
Replies: 38
Views: 3915

Center drill

I just thought that I was missing something and needed some direction because somehow we went from center drills to...Jose's pictures. I have worked in shops where we did large shafts and center were 'cut' in the end rather than drilled... Some threads are intentionally rambling - others obviously u...
by Bill Shields
Sun May 11, 2008 8:32 am
Forum: General Discussion
Topic: VFD Help
Replies: 13
Views: 3247

vfd

sharing a VFD must be done very carefully. most of the drives are set up for specific size motor, and if you change motors, some require reprogramming. Also, you generally DON'T want to disconnect the VFD from the motor with power on - so if you share, you need to have the control located so that yo...
by Bill Shields
Sat May 10, 2008 11:19 pm
Forum: Lathes
Topic: Broken Centerdrill
Replies: 38
Views: 3915

Center Drill

Is there a center drill in these photos? :shock:
by Bill Shields
Sat May 10, 2008 8:27 pm
Forum: Live Steam
Topic: axle machining
Replies: 13
Views: 1776

Collets

I do all my axles in collets.

Cut one end, rough to a shoulder length on the other, measure with a caliper and finish the shoulder.

A couple of 0.001 on shoulder separation is justs fine. Considering how the suspension has to work to accomodate the track / curves etc: it's more than close enough.
by Bill Shields
Sat May 10, 2008 8:00 pm
Forum: Live Steam
Topic: Rose Bits ??
Replies: 7
Views: 1093

supplier

msc direct has them, as does enco - If I understand your description correctly.

I even have a couple that are adjustable...haven't used them in 20+ years, but when making small diameter shafts / shoulders, short of having a swiss lathe in the basement, they are very handy.
by Bill Shields
Sat May 10, 2008 7:59 pm
Forum: Live Steam
Topic: Burnishing
Replies: 4
Views: 847

Burnishing

It totally unnecessary in steam locomotives.

A nice turned finish is more than enough.

Has anyone forgotten why the oil is there in the first place?

Lapping a cylinder bore is another thing - but not on this topic.
by Bill Shields
Sat May 10, 2008 7:55 pm
Forum: Lathes
Topic: Broken Centerdrill
Replies: 38
Views: 3915

Center Drills

Never use them... Use a short, 60 degree spot drill instead - no 'tip' to break off. In the world of unattended, CNC machining, even where they have total control over speeds and feeds, center drills are unused in favor of spot drills for just the reasons everyone has described. Break one off with n...
by Bill Shields
Sat May 10, 2008 5:00 am
Forum: Live Steam
Topic: Lathe Motor
Replies: 14
Views: 2727

Wires

Use all three wires and connect them correctly.

Some designs use a bias resister instead of the 3rd connection.

If your set up uses 3 leads, then use 3 leads.
by Bill Shields
Fri May 09, 2008 6:51 am
Forum: General Discussion
Topic: beginner question...best way to make a .35" hole on ang
Replies: 5
Views: 669

flat spot

if you make the flat spot equal to or smaller in diameter than the .35" hole, it matters not, 'cause it dissapears... the same technique applies to inside corners - but be careful and use a short end mill to get things started until you are below the 'corner', then you can drill. It would be best to...