Holbrook C10 Lathe

**Ueee** · 18th April 2014, 01:37 AM

Well the lathe is almost back together. Just need to sort out the T/S handwheel, coolant plumbing and then think about the best way of wiring the VFD.

I made up 2 new wicks for the bearings, i bought some wool thread some time ago just for making wicks. Winding them was interesting to say the least, my first few attempts the wool just unwound from the wire once i was done. Phil T, do you have any info on winding wicks?

I have made a few cuts but really need some positive rake carbide. The finish off a shear tool is magical. It doesn't really lack the power to push the negative WMNG inserts but it does lack the feed speed. The highest feed in open gear is .00375" per rev. In back gear it will go to .030" per rev but only with a top speed of 250rpm. Lets face it, they were probably never made to remove lots of material.

I am missing a couple of taper pins, the graduations on the TTA should make it easy enough to get the angle right.

Cheers,
Ew

**Steamwhisperer** · 18th April 2014, 09:41 AM

Hi Ewan,
I certainly do. I am. Sure I posted it here somewhere but being out bush camping at the moment it might take me a while to find it. If not I will be home on Wednesday.

Phil

**Bryan** · 18th April 2014, 12:45 PM

This looks like a good start: https://www.woodworkforums.com/showth...62#post1509662

**Ueee** · 18th April 2014, 03:49 PM

Thanks Bryan, i thought Phil had posted about making them before but couldn't find anything searching for wicks. I had forgotten the term trimmings.

Ew

**Steamwhisperer** · 19th April 2014, 10:24 PM

Hi Bryan,
Thanks for that.
Post #321 is the one I was after in whisperings.

Phil

**Ueee** · 19th April 2014, 10:33 PM

Originally Posted by Steamwhisperer

Hi Bryan,
Thanks for that.
Post #321 is the one I was after in whisperings.

Phil

So to be clear, a wick like the image "D" on page 28, the wired section goes into the hole to be oiled, the "tail" on the right goes into the well and draws up the oil?

It may not look like it but the wells on the C10 are at least 3" deep!
Oops..i thought i had a pic of one, i don't!

Ew

**Steamwhisperer** · 20th April 2014, 08:37 PM

Hi Ewan,
You are correct. The tail hangs down into the reservoir. You can make them as long as you like.
The twisted wire part should stop just short of the shaft. This way you will make sure that oil will get in to the bearing and not around the outside.
The trimmings syphon as well as wick so the lower the twisted bit the better the oil delivery by syphon.
Hard to type on the phone so could possibly explain better after Wednesday.

Phil

**Ueee** · 22nd April 2014, 09:50 PM

Thanks Phil.

I have hooked the vfd up and it is running ok I guess. I had to change a few things as the motor kept searching around but I seem to have that sorted. The biggest issue is the lack of torque at 100hz. At 90 I can drop the high speed clutch and the motor bogs down a little but not much. At 100hz it must drop to about 25% of its speed, even when the clutch is eased in as much as possible. The vfd is saying the 1.5kw motor is pulling just over 4kw when you engage the clutch..... Not sure where to go to now. The only option I can think of is to use the 3 motor speeds still plus the vfd. Or possibly the vfd is at the limits of what it can give the motor. I should hook a meter up and see what it draws without the vfd. I don't have a bigger 415v capable drive to try.

Ew

**texx** · 22nd April 2014, 10:38 PM

a tractor wrecker that has a lot of very old tractors might be a good place to look for a tacho .

johno

**Ueee** · 23rd April 2014, 10:13 AM

Thanks Johno.
The more i think about it the more making a digital analogue tacho looks good. That way the reading can be exponential so you can tell 30rpm from 20rpm but still go to 2000. The way the VFD went yesterday though I'm not even sure what to do next. I'm hoping i can catch up with Ray and see what his suggestions are.

Ew

**Steamwhisperer** · 23rd April 2014, 02:25 PM

Hi Ewan,
is that a grease dab in the tailstock for applying grease to the dead centres?

Phil

**Ueee** · 23rd April 2014, 02:38 PM

Hi Phil,
Sure is, I'm sure I missed more than just that little feature too!

Ew

**Steamwhisperer** · 23rd April 2014, 07:13 PM

Originally Posted by Ueee

Hi Phil,
Sure is, I'm sure I missed more than just that little feature too!

Ew

Hmmm very classy lathe then.
Loved the video tour as well.

Phil

**Michael G** · 23rd April 2014, 10:00 PM

Originally Posted by Steamwhisperer

is that a grease dab in the tailstock for applying grease to the dead centres?

Originally Posted by Ueee

Sure is

But hasn't everyone's lathe got one of those? (Mine has)

Michael

**morrisman** · 24th April 2014, 12:16 PM

Is your middle name Stirling Moss , the way you were flicking thru those gears , like driving a rally car

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