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ML7 Hand Crank / Wheel?

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Dr_GMJN23/02/2021 18:19:50
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1267 forum posts

All, I’m currently coming towards the end of my ML7 fettling. I was going to get the Hemmingway kit for the hand crank. There have been many times when building the 10V when I’ve thought one would be very handy for turning the chuck backwards and forwards while tapping threads or using the tailstock die holder.

I have this old steering wheel, which I thought might be as good or better for doing this. It would be a simple ask to mount it to a spindle with an expanding cone at the end for locking.

If I needed to crank the spindle perhaps for rewinding the leadscrew while engaged with the chuck, I could easily 3D print a removable handle adapter for one of the small outer holes in the spokes:





Maybe I’ve not thought this through for long enough, but on the face of it, it would be more comfortable to use than a crank, and safer if I ever forgot to remove it.

Any comments?

Lee Rogers23/02/2021 18:38:42
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166 forum posts

Who cares if it's safe or not? It looks brilliant. Got me thinking along the same lines , ships wheel for my Admiralty Drummond.

JasonB23/02/2021 18:46:31
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22605 forum posts
2643 photos
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I'd just check you can get your arm around the rim when the crank knob is at the back of the machine while you are holding the tailstock die holder in the other.

Dave Halford23/02/2021 18:46:43
2015 forum posts
23 photos

Never pass it's MOT theres no horn.

Steviegtr23/02/2021 18:53:15
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2423 forum posts
336 photos

Sorry that is no good at all. Post to me instantly. For my wall. Niiiice.

Steve.

Dr_GMJN23/02/2021 18:54:30
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1267 forum posts
Posted by JasonB on 23/02/2021 18:46:31:

I'd just check you can get your arm around the rim when the crank knob is at the back of the machine while you are holding the tailstock die holder in the other.

I’m assuming I wouldn’t need a crank for simple manual threading with a tap or die - Id just be holding the forward most part of the rim and moving it up and down while gradually inching it around as the thread progresses?

Id have thought if there’s enough leverage for my Dad to park a 1962 MGB, an M5 die wouldn’t be an issue...

JasonB23/02/2021 19:00:17
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22605 forum posts
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You would want to be cranking it backwards while pulling the tailstock holder away from the work to back the tool off once thread is cut.

Though inching the work round won't get those projects finished any time soonwink 2

Dr_GMJN23/02/2021 19:03:13
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1267 forum posts
Posted by Steviegtr on 23/02/2021 18:53:15:

Sorry that is no good at all. Post to me instantly. For my wall. Niiiice.

Steve.

I’ve got another for the wall, only temporary though:

Dr_GMJN23/02/2021 19:09:47
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1267 forum posts
Posted by JasonB on 23/02/2021 19:00:17:

You would want to be cranking it backwards while pulling the tailstock holder away from the work to back the tool off once thread is cut.

Though inching the work round won't get those projects finished any time soonwink 2

Hmmm. What I’ve been doing is turning clockwise for half a turn or so, anti-clockwise a bit, then another half turn and back a bit, until it’s threaded. Then just turn the chuck anti-clockwise and the die or tap unscrews itself. Basically how I was taught for hand tapping in a vice or whatever - I think to break the swarf. I’ve just always done it like that, and automatically did it in the lathe too. In other words I’m never continuously turning the part/chuck/handle.

It’s just a bit uncomfortable physically turning the chuck by hand like this.

duncan webster23/02/2021 19:21:28
3947 forum posts
63 photos

When I had an ML7 I left the guard off the belt from motor to layshaft and used the big pulley to turn the spindle by hand

Dr_GMJN23/02/2021 19:40:34
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1267 forum posts
Posted by duncan webster on 23/02/2021 19:21:28:

When I had an ML7 I left the guard off the belt from motor to layshaft and used the big pulley to turn the spindle by hand

I’d rather keep the minimal safety features intact! Especially since when working in the garage, I’ve occasionally turned around to find one of the small-ish kids watching from close quarters before now.

Nicholas Wheeler 123/02/2021 19:42:36
913 forum posts
87 photos

When I need to to use a bigger tap on my WM250 a 17mm open spanner on one of the chuck jaws works well...

Steviegtr23/02/2021 19:48:43
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2423 forum posts
336 photos
Posted by Dr_GMJN on 23/02/2021 19:03:13:
Posted by Steviegtr on 23/02/2021 18:53:15:

Sorry that is no good at all. Post to me instantly. For my wall. Niiiice.

Steve.

I’ve got another for the wall, only temporary though:

They must be worth good money these days. My 2 MGB's had them & my Etype too. Love them. I am not Jealous HONEST. angry

Steve.

Steve.

Dr_GMJN23/02/2021 19:52:13
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1267 forum posts
Posted by Nicholas Wheeler 1 on 23/02/2021 19:42:36:

When I need to to use a bigger tap on my WM250 a 17mm open spanner on one of the chuck jaws works well...

Thanks Nicholas - I keep a large adjustable spanner handy too.

For the work I’m doing it’s small stuff - I’ve only got dies up to about M10, but can’t remember using anything like that big so far.

Howard Lewis23/02/2021 20:00:01
6040 forum posts
14 photos

Safer than just a handle if you forget it is there and start the lathe (How would I know? )

Does remind me of the one that my brother gave me for 109E Anglia!

Howard

Nicholas Wheeler 123/02/2021 20:18:49
913 forum posts
87 photos
Posted by Dr_GMJN on 23/02/2021 19:52:13:
Posted by Nicholas Wheeler 1 on 23/02/2021 19:42:36:

When I need to to use a bigger tap on my WM250 a 17mm open spanner on one of the chuck jaws works well...

Thanks Nicholas - I keep a large adjustable spanner handy too.

For the work I’m doing it’s small stuff - I’ve only got dies up to about M10, but can’t remember using anything like that big so far.

That's pretty normal for me; I think of M5 as small.

bernard towers23/02/2021 22:27:10
578 forum posts
109 photos

My that’s a fair old thing to get your hand caught in if the lathe is turned on. Why not have a single handled version that can idle so accidents can’t happen.

Dr_GMJN23/02/2021 23:15:07
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1267 forum posts
Posted by bernard towers on 23/02/2021 22:27:10:

My that’s a fair old thing to get your hand caught in if the lathe is turned on. Why not have a single handled version that can idle so accidents can’t happen.

I’d have thought the last thing I’d be doing if I switched it on accidentally would be to stick my arm into the spokes!

I hope I’d simply switch it off again with no harm done.

John Baron24/02/2021 08:50:36
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520 forum posts
194 photos

I made a similar thing using an old washing machine tub pulley ! I did put a handle on it to aid quickly unscrewing a tap.

21022015-01.jpg

More pictures in my album.

bernard towers24/02/2021 09:51:54
578 forum posts
109 photos

You may think it’s the last thing you would do but just look at you tube videos and see how many people have got bits of fingers missing and just recently someone on here mentioned some one injuring themselves. So please don’t be that person who would never make that mistake.

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