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Tyzack Zyto Serial Number ?

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Paul Kennedy27/12/2018 00:27:48
45 forum posts
122 photos

Hey guys,

Sorry to post again so soon after my last post. However I have found a serial number of sorts on my Zyto. B 907. Im wondering if anyone knows where or if there are records of the year it was produced ? I know Myford ML7's can be identified fairly accurately using there serial number on the back of the bed ways. Im hoping the Zyto can also be aged ? using its serial number. Im also looking for more information or availability of the gears it came with. Im missing the 45,50 and 63 tooth gears. Also looking for the older style gear covers and the handwheel for the leedscrew although i guess i could make this when i get her running. Would love to hear about a good motor hats quiet and what the best flat belt to use would be ? Also quiet ! Grease or oil for change gears ? Also any and all information, articles on the Zyto or even just what magazine isse to find it in is also welcome. Also looking for the origional tool post clamp but i think i have a spare ML7 tool post clamp i could use and recommendation for a four way or Quick Change tool post for this size of lathe. I know its not origional but it can be removed easil so. OK thats it for now. Likely forgot something but i need to retire for the night now. Gnite all and happy new year.

Chris Trice27/12/2018 01:20:03
avatar
1360 forum posts
9 photos

A lot of people use car timing belts run with the teeth on the outside but you would need to disassemble the spindle to fit them. I have a few genuine Zyto spares. I'll check what timing gears I have.

Martin Whittle27/12/2018 08:52:55
75 forum posts
5 photos

I use a car poly vee fan belt with the vees on the inside. It is slightly wider than the flat pulleys, but not an issue apart from the smallest pulley, where it rubs against the large gear on the back gear spindle, which causes it to rub against its pair on the spindle when out of engagement surprise. So I have lost top speed but this is not an issue as I would not normally use it, and in any case I can do a step up between the motor and its countershaft if I really wanted it. Just added a view of the headstock end of my Zyto to my album, there are a couple of others in there.

zyto headstock end.jpg

I use Esso Nuto 32 on the spindle and Mobil Vactra 68 on the slideways, and the gears on the rare occasions that I use them.

The top slide had only a single screw fixing on a lug on one side for attachment to the cross slide - fine for normal use. When I first had the lathe about 30 years ago, I was using it to mill a 4-way toolpost and the lug broke! The single attachment point makes it unsuitable for milling stresses causing lift of the slide - but I don't remember exactly what I was doing at the time. So I cut the remainder of the lug off, plus a skim off the underside of the top slide to reduce the height a little, drilled and tapped some holes to the underside, and attached a steel mounting plate so I could put it all back together.

A couple of years ago I put a quick-change tool post on, Ref. 2051 from RDG tools. Works well, a little oversized there is restricted but sufficient 'land' on the topslide for the toolholder height adjusting screws to bear on, but I am pleased with it. Currently waiting for RDG to get some more of the toolholders in stock for this toolpost.

Hope this helps

Martin

Paul Kennedy27/12/2018 15:38:26
45 forum posts
122 photos

Thanks Guys. I much appreciate any help you can provide. Ive an album of my Zyto as it was delivered errr 3 weeks ago now. An impulse buy on E-Bay late one evening. My thoughts were its a little lathe ! I will have her up and running in no time :/ Thinking a week or two at the outside. :'( Anyroads.

s-l1600 (10).jpg

Parts i either need or want.

Leadscrew Handle,

Motor,

Countershaft,

Flat Belt,

Guards,

Gears, 45,50 and 63 - The 63 was a later accessory for metric conversion.,

Orgional Faceplate,

Origional Driving Plate,

Any and all litriture pertaining to the Zyto, Accessories, Projects etc.

Thanks to Chris and Martin for their replies. Will look forward to hearing from you Chris re any spares you may have.

Im worried that my headstock bearings are shot. I full cups with 3 in 1 oil and turn the spindle by hand and you can see the right hand side cup drain of oil as you turn spindle.. I would't use 3 in 1 when in use but i was just wanting some lube in there to help free the spindle out. I seem to have a tight spot so likely the spindle has been siezed and has gaulling. I should really strip it and inspect it but 've avoided this so far.

 

Sorry for apaling spelling but im unused to this forum editing system. How do you turn of overwrite text ? I cant seem to insert new text before posting ie edit spelling errors.

Edited By Paul Kennedy on 27/12/2018 15:41:32

Bodger Brian27/12/2018 15:48:39
avatar
160 forum posts
39 photos
Posted by Paul Kennedy on 27/12/2018 15:38:26:

Sorry for apaling spelling but im unused to this forum editing system. How do you turn of overwrite text ? I cant seem to insert new text before posting ie edit spelling errors.

Not sure what you mean by the forum editing system - i’ve never noticed anything particularly different from any other text editor. The only thing that bugs me whilst editing on an iPad is that Return sends the cursor to the beginning of the text rather than to a new line.

As far as overwrite text is concerned, have you accidentally pressed the ‘insert’ key on your keyboard? This toggles between insert and overwrite.

Brian

Edited By Bodger Brian on 27/12/2018 15:49:08

Paul Kennedy27/12/2018 23:26:44
45 forum posts
122 photos

Perhaps blush

Chris Trice28/12/2018 01:03:25
avatar
1360 forum posts
9 photos
Posted by Martin Whittle on 27/12/2018 08:52:55:

I use a car poly vee fan belt with the vees on the inside. It is slightly wider than the flat pulleys, but not an issue apart from the smallest pulley, where it rubs against the large gear on the back gear spindle, which causes it to rub against its pair on the spindle when out of engagement surprise. So I have lost top speed but this is not an issue as I would not normally use it, and in any case I can do a step up between the motor and its countershaft if I really wanted it. Just added a view of the headstock end of my Zyto to my album, there are a couple of others in there.

You could always cut one of the vees off with a knife to make the belt narrower.

Paul Kennedy28/12/2018 14:03:13
45 forum posts
122 photos

Hey guys, Can any of you recommend where i can figure out the speed range of the Zyto using the diameter of the pulleys and back gear ratios. Also i need clarification on how the little knurled spring loaded pin in the main spindle 80 tooth gear interacts with the pulley drum. Likewise an explanation of the 'dog clutch' at the rear. Again any help is appreciated. I need all i can get

Paul Kennedy28/12/2018 23:16:14
45 forum posts
122 photos

Ok Guys. Large pulley is 4" middle pulley is 3 1/4" and small pulley is 2 1/2"Please ignore my question on the 'dog clutch' i meant backgear and was just being stupid at the time. I get tired as i try to do too much and then stupidity occurs blush. Ive been mostly busy cleaning, inspecting , fettling and repainting the zyto for past 3 weeks now. Every cast part is getting 4 coats of paint im soon to start final coat. Then final polish of parts and assembly

Martin Whittle29/12/2018 09:08:45
75 forum posts
5 photos

Speed required depends on the work: material, diameter etc. For most practical purposes on smaller work I leave the lathe at a 2:1 step down on the drive from the motor countershaft (approx. 2:1 pulley diameter ratio) so around 700rpm usung a 1400rpm motor.

I have the option also of the middle step on the pully giving me a 1:1 ratio roughly, so 1400rpm - this is as fast as i would ever go on this lathe but rarely used. Also a step up using the smallest pulley - I don't use this.

The motor and its countershaft both have 2/3/4" 3-step pulleys so I can double or halve the speed here also - I almost invariably use the 3" sections on both so the countershaft runs at the motor speed. The previous owner had made the motor drive arrangement this way and I have had no reason to change it.

So using the step down 2:1 to the motor countershaft I get around 350rpm. I think using the back gear gives me around a 6:1 step down so maybe down to 60rpm (I am not in a postion to check it at the moment) for larger work / higher torque.

The spring-loaded pin: the pulley is largely hollow with a couple of webs - there is a hole drilled in one of the webs for the pin to go into, to engage direct drive when the back gear is not used. So the pin can be pulled out and rotated 90 degrees to alternately put it in the locked or unlocked settings - the cross-pin being then either on the surface of the pulley side, or dropped into the recess. A previous owner had at one time managed to break out the web hole side and repair it by using a small steel block screwed inside the rim of the pulley having a hole drilled in it to take the pin. I did a little fettling of the pin at one point making it slightly longer with a stronger spring because it was liable to jump out of the hole on the pulley at times.

In regard to the oil disappearing from the oil cups rapidly, which I think you mentioned elsewhere: don't worry about it. Mine does this, especially so on one of them; just give it a drink occasionally. But it still works fine; it is not so large and rigid as my Warco WM250, but the runout using the 3-jaw chuck is better than the WM250 at around 1 thou vs. 3 thou. The Zyto still has a valued place in my workshop.

Martin

Edited for spelling!

Edited By Martin Whittle on 29/12/2018 09:09:51

Paul Kennedy29/12/2018 21:40:05
45 forum posts
122 photos

Thanks Martin, You have given me a lot to think about. I just need to track down a countershaft and motor now. My Zyto is coming along slowly. Starting to give parts their final coat of paint now. Would like to nickle plate some parts though and don't know where to get some nickle rod or strips from at a reasonable price. E-Bay seems overpriced for the size amount of nickel you get. Also what do you think about my idea of putting some wick into the oil cups ? Do you know if they had wick fitted when new ? I recall that the ML7 cups did so can only guess that the Zyto was the same. I'm also considering replacing the cups with cheep chineese drip feeders. I would have to make a male/female adapter as they are 10mm versus ? whatever thread is on the zyto cups/ in the headstock but its doable i think. So i'm needing a 1400 rpm motor or there about's. What diameters are the pulleys connecting your Motor - Countershaft ? I learned about pulleys and such when i served my time but i don't think I've had need of that part of my brain since :/ I guess its still rattling around in there somewhere if only I could remember where i filed it If i don't hear from you before New Year then Slange A Va !

Howard Lewis30/12/2018 17:22:28
1947 forum posts
2 photos

At a guess, the thread on the Zyto will be Whit form, BSF or BSW.

If you can get it up and running, possibly you could then turn up bushes to accommodate wear in the Headstock bearings.

Howard

Cician Cratimaru11/05/2019 01:34:47
1 forum posts

Sorry to post here but i dont know where...

i recently bout an early zyto is 1926 model and i have a missing cog

im new in this and i dont rely know from where can i buy spare parts

anyone know where i can get some? Thank you

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