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Kryn,

You may need a 3 phase motor of about 0.55kW to give enough power at low speeds, and this could weigh more than 15 -20 kg, which could double the existing head weight.
You would need to...

Kryn,

The amber fault light on mine comes on when the motor is overloaded (drawing high current over it's rating).
Possibly your motor has a short circuit internally, or even has a seized...

Dingo,

Looks like a new Chinese lathe slide....:)

I think a bit of careful scraping should bring it up to scratch (couldn't help that one).
The angled faces of the dovetail may be more...

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Andrew.

Eric,

Excellent!.

Just for completeness, attached is the pitch chart updated to show imperial thread pitches as well as metric.
It seems your lathe should be able to cut many imperial threads...

C/B was used as it was convenient for the calculation description. It is simply the inverse of the B/C ratio. (B divided by C = 2, therefore C divided by B = 0.5).

In the earlier post, the QCGB...

Eric,

The 40T spindle gear and the 100T gear at position C would be the first calculation, as the 30T and tumbler gears are all idler gears in the train, so they do not affect the gear train...

Eric,

If you know the number of teeth on the drive gear on the lathe spindle, we can work back through first principles to determine the change gears you need to cut the worm most accurately.
We...

Eric,

Does the gear shaft at position B allow for two gears on the shaft, or is it a single gear idler only?

Andrew

Eric,

Spreadsheet updated to allow selected gear to be installed in position C.
Position B is an idler gear by the original chart and would therefore not affect the ratio. It would be changed to...

RC,

My initial checks into possible compound gear trains suggests that your assessment is correct, depending on the degree of accuracy required to cut this worm.

Andrew.

Eric,

I can update the spreadsheet to show pitches that result from other combinations of gears in B and C if you need.

Working back from the chart (using the screwcutting values, as the feed...

Eric,

Spreadsheet attached. The calculations are in the spreadsheet cells. The QCGB ratios were calculated back from the picture of the label you supplied.
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If you can change the 30...

Eric,
Below attached is a chart I threw together that should be correct for your lathe based on the following assumptions:
1. Leadscrew is 2mm pitch
2. the 30 and 100 tooth gears in positions B...

Simon,

If you can buy one that works well, you should be able to make one that works as well or better, to suit your lathe.
Things to focus on are rigidity, good lathe bearings, rigidity, smooth...

Kryn,

Bearings for upgrade http://www.ausee.com.au/shop/item.aspx?itemid=1323

As you probably already know, these will fit on both the C2 and the X2.

My X2 shows huge improvement with...

Sacc,

Good work!

I much prefer the over and under ball turner due to their simplicity and rigidity, as the cutting load is directed straight towards the toolpost.

Andrew.

Kryn,

Are these the parts?
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May be worth checking the motor shaft diameter as I believe this has varied with certain models.
I think the one pictured is 9mm ID.

Andrew.

Simon,

It would depend on how much thread engagement you need, which would depend on what you are using the nut and bolt for.
The actual position, sizing and thread face shape of the thread in...

Snowy,

The only times I have needed to change the belt drive to a different ratio in the last six months of use was when I used a parting tool on a piece of 3" diameter steel bar, and when I was...

Snowy,

Some ideas here maybe helpful:
https://www.woodworkforums.com/showthread.php?t=190097&p=1822165#post1822165

Andrew

Kryn,

Posts with pictures for my X2 belt drive conversion.

https://www.woodworkforums.com/showthread.php?t=121056&p=1611899#post1611899...

Kryn.
Attached spreadsheet with pulley sizes that can be changed to suit whatever centre distance between pulleys on the X2 you like.

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I will find the link to my X2 belt conversion and...

Kryn,

After a bit of fiddling with my C6 gear program to give suitable results for your C2 with a 16TPI leadscrew, the following are some change gear settings that may work for various metric...

Kryn,

Good link that should help those with this lathe and imperial leadscrew.

The gear change combination suggested on this page for 1.5mm pitch should work fine for your ER25 collet chuck....

Kryn,

Working back from the gear train suggested from your original post, the leadscrew is metric with a 1.6mm pitch.
If so, we may find a better combination of cahange gears to use.

Andrew

Kryn,

It sounds like your lathe may be an imperial one with a 16TPI leadscrew.
You will need to check the leadscrew pitch before you can work out the change gears that should be used.

If you...

Kryn,

Does the gear not reach to mesh with the C gear, or is it in the wrong plane?

The Grizzly manual for a C2 gives for 1,5mm pitch: A 40, B 60, C (nothing), D 40.
This means that a spacer...

Guys,

I've just recently got to a working stage the conversion to 3 phase motor with a VSD for my C6 lathe.
The VSD I am using is a Danfoss VLT 4kVA unit which requires 3 phase 415V input....

Brian,

Be vary wary of using a fly cutter on this mill... the plastic gears can very easily strip with the intermittent cutting action, especially if you crash the fly cutter into the work.
...

Joe,

Looks like you "lifted" a cashbox.

Andrew

Harty,

That tapping guide looks very nice - a good idea for my next project.

Gents,

I've just finished making an ER32 collet chuck for the C6 lathe.
The MT3 collet chuck on the mill wasn't...

Eric,

You could try Highett Metals on Boundary Road in Braeside.
They usually have a aluminium offcuts bin near the office which I have found handy for a couple of projects.

Andrew

Bob,

Agree with that. I'm considering turning one of the spare arbours into a fly cutter, however, my patience level will need to recover as the black steel was horrible to machine, making a...

Following on from this post about the boring head I made (https://www.woodworkforums.com/showthread.php?t=121056&p=1706088#post1706088), after using it a couple of times I found I needed a lot more...

The type of lathe dog in Bryan's picture can be made fully balaced by making the two sides exactly the same as the bottom side in the picture, including the drive leg on both sides.
I made a very...

Judging by the youtube video about this lathe, it looks almost the same as the Sieg C6B with a different shape headstock sheet metal and a few minor changed details and extra features like a lever...

I have a 2SPB cast iron pulley approx. 5 1/4 " OD with a 1 3/8" taperlock in Melbourne for the taking. Slight surface rust and minor groove wear, can be easily cleaned up, or used as is.

Andrew

Guys,

Just completed the final(!) modification to the C6 lathe's change gear setup. This one is a feed reversing tumbler arrangement.
The standard setup on the C6 requires the normal spindle...

Ian,

Attached exploded diagram and parts list may provide some ideas.
Do you have any photos?

Andrew

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Guys,

Further to the modification to the C6 spindle idler in this post (https://www.woodworkforums.com/showthread.php?t=121056&p=1743732#post1743732), I have made a replacement change gear quadrant...

Ian,

I've only just written the program, so it should be able to give only working solutions. The solutions I have previously sent you were found using an Excel spreadsheet, and did not account...

Ian,

Sorry....Typo...should have been 75 not 72.
I didn't get an extra 25

Andrew

I have set it up to suit the gears that came with my C6 ie 25, 30, 33, 40, 42, 50, 52, 60, 66, 70, 72, 80(2off), 90(2off). i don't know what the other gear is, unless this includes the reversing...

Amos,

Well done.
That mill looks like a version of the Sieg X2 mill. Metal gears are available for these from the Little Machine shop online.
The plastic original gears on these are OK until...

Ian,

I've written a program for C6 gear combinations(Windows). It's very basic so far.
Please tell me what you think!
Screen Shots:

303139303140

Andrew

More info...

With the adjustable idler setup, for RH threads idler size can be anything from 40T to 90T, and the smallest that works for the particular combination is best.
Using the standard...

Ian,

Check out this thread https://www.woodworkforums.com/f65/your-latest-project-121056/index77.html#post1743732 for the adjustable idler gear mounting for the C6.

Having just installed it, and...

Gents,

If any of you have been following this thread (https://www.woodworkforums.com/f65/sieg-c6-lathe-new-threading-capabilities-181303/) you may have noted that the change gear selection process...

Ian,

I blame the heat... probably about 40C in the workshop, and I'm silly enough to be making up an adjustable idler mounting plate and shaft as described in a previous post.
Mock-ups so far are...