anything about this lathe Harrison lathe

[george snowParticipant @georgesnow38260]

I have a harrison 12" lathe that is exactly the same as the one shown above but i am unable to find any correct manuals for this lathe, now that i would like to start cutting threads I dont know what size gears i need or should have. please help any information would be greatly appreciated.

[george snowParticipant @georgesnow38260]

[Brian HParticipant @brianh50089]

Try http://www.lathes.co.uk/harrison/index.html

No connection, Brian

[HopperParticipant @hopper]

It looks like it has a quick change gear box so you probably won't need any extra gears for regular screwcutting. The collection of levers on the left below the headstock should give you most standard variations, following the charts attached adjacent to the levers.

[BazyleParticipant @bazyle]

Join the Yahoo Harrison lathes group. There is probably some info you need in the files section.

Although the format of Yahoo is a pain it does work eventually and better with a non-Microsoft browser. If you are not already using Yahoo don't worry you don't have to give them your phone number when asked – they try to frighten yo into handing it over so they can profile you phone usage.

Generally it is best to use the Yahoo group for information very specific to your machine and this forum for any query that is more general and applies to any lathe.

[NJHParticipant @njh]

Ha George – I recognise that lathe!

Many ( no many, many! ) years ago I went to secondary school which was a " new idea" technical school ( to sit alongside grammar schools). It had a wonderfully equipped engineering workshop which had six lathes, two of these were Harrisons that you picture. My first turning was using the Harrison to make a plumbob – I still have it somewhere! I didn't get as far as screw cutting but the lathes website given above , by Brian, will most likely be a good route to follow.

Regards Norman

Edited By NJH on 25/06/2017 09:57:52

Edited By NJH on 25/06/2017 09:58:56

[RobboParticipant @robbo]

If its 12" then may be an L6. Have a look here – **LINK**

[mark smith 20Participant @marksmith20]

Looks like an L6 MKII ,the MKIII has a more boxy appearance to the headstock housing,etc…

Theres a manual available for sale here ,though in US.

http://www.industrialmanuals.com/harrison-operators-instruction-parts-list-inch-swing-lathe-manual-p-1021.php

Edited By mark smith 20 on 25/06/2017 10:30:20

[Clive FosterParticipant @clivefoster55965]

Three thumb levers in a row on the screw-cutting gearbox means its a metric machine so its important that you get the right handbook as there are differences between apparently similar machines. Generally Harrison used the same gears inside both imperial and metric boxes with an extra selection pair controlled by the third lever to extend the range. I think the 140 series is the same as the one shown so the rather nice picture of the gearbox plate 5 th picture down on ;- **LINK** may help if yours is missing or if you have one sans plate. But need to check by measurement.

You will also need to know how to set up the threading indicator. May be another plate for that. probably involves changing the little gear that engages with the leadscrew.

I always found the speed selection diagram on top of the headstock with its pretty coloured lines wonderfully incomprehensible on the rare occasions I got to drive one.

Clive.

[Steve PaveyParticipant @stevepavey65865]

You could try emailing Harrison to ask for a PDF copy of the handbook. I did that for mine and they very kindly replied with a copy within a few days.

Otherwise, the Yahoo site. You can get one from lathes.co.uk but it will be fairly expensive.

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