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Home Base => Introductions => Topic started by: Soren Hansen on January 31, 2016, 12:04:02 PM

Title: New member from Denmark
Post by: Soren Hansen on January 31, 2016, 12:04:02 PM: Hello All

Yet another newbee arriving

I'm the happy owner of a "new" second hand Myford ML7 from 1969, which is my first lathe.

I have been dabbling with a small danish lathe named "SR80" which have a hight over bed of 80 mm, no powerfeed and 4 locked speeds via belt/pulley.

My ML7 have no gearbox, but I'm steadily building up changewheels, but finding and fitting a 127 tooth wheel has my number 1 priority.

Greetings from Denmark

Soren
Title: Re: New member from Denmark
Post by: seadog on January 31, 2016, 12:14:48 PM: Welcome Soren. There are 127t gears being advertised on eBay at the moment - http://www.ebay.co.uk/itm/127-TEETH-GEARS-FOR-MYFORD-LATHE-FOR-ML7-SUPER-7-ML10-/290924125927?hash=item43bc6ddee7:g:OT4AAOxy38tTmGLX

Graham
Title: Re: New member from Denmark
Post by: awemawson on January 31, 2016, 01:08:30 PM: Welcome Soren :thumbup:

Good to have you come aboard - tell us a bit about yourself, your workshop and your projects - we like photos :clap:

(640x480 is the best compromise resolution between visibility and too much data)
Title: Re: New member from Denmark
Post by: krv3000 on January 31, 2016, 02:22:15 PM: hi and welcume
Title: Re: New member from Denmark
Post by: Soren Hansen on January 31, 2016, 02:44:00 PM: Quote from: seadog on January 31, 2016, 12:14:48 PM
Welcome Soren. There are 127t gears being advertised on eBay at the moment - http://www.ebay.co.uk/itm/127-TEETH-GEARS-FOR-MYFORD-LATHE-FOR-ML7-SUPER-7-ML10-/290924125927?hash=item43bc6ddee7:g:OT4AAOxy38tTmGLX

Graham

Thank you for the link, I allready have it on my watch list :thumbup:
Title: Re: New member from Denmark
Post by: John Rudd on January 31, 2016, 02:50:58 PM: Hi Soren,

You know the alternative to the 127 tooth wheel is 21....( 6:1 ratio as near as dammit...)
Title: Re: New member from Denmark
Post by: Soren Hansen on January 31, 2016, 03:45:05 PM: Hi John Ruud

I can't find the article right now, but have read if I use a 47/37 combo, I transform my leadscrew from a 8TPI to a 2,5mm pitch and the error is less than 0.015%, but then I have to buy the 47 and 37 gears.

Then again, if I was to use a 21 gear, my leadscrew would catapult the apron down the bed so fast it would need a airbag at both ends of it's travel, or do I misunderstand anything ?

Mind you I come from a total manual lathe like the one on this pic, but without the gearbox and changewheels
Title: Re: New member from Denmark
Post by: philf on January 31, 2016, 04:21:30 PM: Soren,

This chart shows the configuration to use 21t gear(s) for metric threading.

(http://listerengine.com/coppermine/albums/userpics/10017/ML7Chart_zps9mnphxpe.jpg)

(http://listerengine.com/coppermine/albums/userpics/10017/ML7Chart2_zpste16a8io.jpg)

(http://listerengine.com/coppermine/albums/userpics/10017/ML7Chart3_zpsrkgzhk5y.jpg)

No airbags necessary!

Hope this helps.

Cheers.

Phil.