Recommissioning lathe size of hole to cut for belt

[Martin NewboldParticipant @martinnewbold]

I wrote to ABB today to see what they will say about this matter

[Martin NewboldParticipant @martinnewbold]

Sent inverter back to ABB for testing and to see if it was faulty. Will not recommend or purchase from the shoddy firm I purchased these parts from again. They have not done much to resolve their goof.

[Martin NewboldParticipant @martinnewbold]

The crappy people I bought the inverter and the motor from have said that people on this forum told me to use a 0.75 kw motor and Drive .

Can anyone find any recommendations from this forum in this regard as don't believe them

Thanks

Martin

[john kennedy 1Participant @johnkennedy1]

That looks scary. I know next to nowt about electricity but it looks like the motor is trying to earth to the stand ?

I would get an electrician to have a look at that before I switched it on again.

[bodgeParticipant @bodge]

Hi Martin I think you have a non standard spindle ! early ones 02-03 had a 3/4 w, late 03 onward 7/8 w spindle nose thread.. A myford type adapter is simple enough just a flanged bush threaded inside to suit spindle nose, thread the outside to 1 1/8 w. while your at it 24×1.5mm is another handy size to have.. As for the tumbler gear not to hard to reverse engineer though you may need oem type L shape banjo. The non standard spindle may make things a little difficult !…….b

[Martin NewboldParticipant @martinnewbold]

Hi John Inverter has gone back to AAB as the dealer would not handle it a well known internet company with supermarket in its name . The Motor TEC have been in contact with them and expecting a call today . Its lucky I had the lamp on it as it took the brunt of the load discharge not me thankfully.

 

Hi Bodge , Yes have some castings now from a wonderful chap and have started cleaning them up . Have learned that the sleeve at the gear end is 2" and slightly longer than the 1.5" which is normal . I have not taken it off as yet to see why or if it can be shortened. Have seen some conversion adaptors on Ebay for chucks and nose spindels not sure if they would fit then. This was fitted when it came I could not tell you if its been adapted or if its original. either way I believe I can bush the tumbler am making out if this is not something i can shorten

I have put this in my chuck to see how I can clean it up . But will have to use a friends lathe when i can as mine is no longer running with the inverter and Motor current issues.

 

Edited By Martin Newbold on 29/04/2016 09:46:45

Edited By Martin Newbold on 29/04/2016 09:53:01

Edited By Martin Newbold on 29/04/2016 09:55:04

[Martin NewboldParticipant @martinnewbold]

Hi there Bodge,

Here is thread on my lathe 3/4" w so probably 02-03

[bodgeParticipant @bodge]

Hi Martin

Could you please measure major out side dia of the thread, because your caliper is showing an inch near enough on the register and im not seeing any step down to 3/4 in. the point being if you cut a ten tpi whit thread on 2 inch dia bar your gauge would still fit perfectly showing you had 10 tpi witworth 55* thread, i dont know for sure but i think the dia stamped on the gauge just refers to it being an industry standard in as much as you can buy a tap and die that size ie 3/4 in. As for year of manufacture i think you have a really early one, what might be called a pre production model ……..b

[Martin NewboldParticipant @martinnewbold]

Bodge . I think that is the shoulder you are referring to . The thread is.major 09845" or about 25.1mm. The gauge I used was a Draper No 553 BSW 4-62. It was made in West Germany if that helps I think the G is tome German na,e as its TPI as in 10 

Edited By Martin Newbold on 30/04/2016 10:08:24

[bodgeParticipant @bodge]

Martin. As i understand it that would make it a 1 inch by 10 tpi w spindle nose thread, To be 3/4 x 10 the the od of the thread would need to be a few thou less than 0.750 inch………b

[Martin NewboldParticipant @martinnewbold]

Hi Kieth

Am slowly obtaining these parts for this tumbler reverse gear . They are quite hard to find you are right about that , I just need one more 20T 14DP gear to finish the gear parts. Have been laying them out to see how they will interconnect , Geoff has been lovely and am so pleased to have the castings . Which I never thought I would obtain and have to make from steel block.

[Martin NewboldParticipant @martinnewbold]

After I rang TEC Electronics on Friday I received an email from director of this supermarket company this was its contents "TEC Electric have been in contact with me. What is it that you would like them to do for you?" Bearing mind this chap is a director . Don't you think he would know what they need to do from the telephone conversation? Am gasping at this!

[HopperParticipant @hopper]

Posted by Martin Newbold on 30/04/2016 11:14:55:

After I rang TEC Electronics on Friday I received an email from director of this supermarket company this was its contents "TEC Electric have been in contact with me. What is it that you would like them to do for you?" Bearing mind this chap is a director . Don't you think he would know what they need to do from the telephone conversation? Am gasping at this!

Don't look a gift horse in the mouth. Tell him you want all your money back as the gear is not fit for purpose.

BTW, re needing a bigger motor for that lathe, I don't think so. You say your motor is .375kW, which is just over 1/2hp in old money. My 3.5" Drummond M-type runs just fine on an old 1/2hp motor and has done for years. It will take a .100" deep cut in steel at a roughing feed rate all day long without troubling the motor. Although, this is with a countershaft between motor and lathe spindle to gear the drive down, which gives more torque. Countershaft runs at about 400 rpm, lathe spindle top speed is about 800rpm. (fast enough for them old bronze bearings.)

 

All I use for oil in the headstock bearings is whatever car or motorbike engine oil is lying about the shed at the time. Synthetic is nice as it doesn't gum up but for most of the past 40 years it has run happily on dino oil, usually 20/50 (which is about the same viscosity as 80/90 gear oil due to different viscosity indexes used for motor and gears oils.)

Edited By Hopper on 30/04/2016 11:40:41

[Martin NewboldParticipant @martinnewbold]

Yep Hopper , The Drive is back with AAB for testing and hoping that what TEC said to that to him as have already asked for that motor to be tested too and been refused by supermarket company and I have generally been given the run around by them and the guy dealing with it seems clueless . I would have thought the Manager at Tech Electronics was more than capable of explaining this to him if he wanted to listen.

I have spoken to Axminster and they recommend 1.0hp on everything now even grinders. Supermarket have now also stated to me in a phone call that this drive motor combination is not sufficient and has a few hundred watts to cope with tool on material by email. They also state they gave no advice before sale. I am just disappointed they didn't tell me this before I Purchased this kit, so really am going to buy this 1.0hp kit if this nonsense with this supermarket company doesn't go anywhere. I certainly will not be currently buying the new kit from this supermarket company , Caveat Emptor I think they call it. Can think of some expletives too. Am thankful of my friends who can help me out while this is offline.

Martin

[Martin NewboldParticipant @martinnewbold]

Posted by bodge on 30/04/2016 11:08:39:

Martin. As i understand it that would make it a 1 inch by 10 tpi w spindle nose thread, To be 3/4 x 10 the the od of the thread would need to be a few thou less than 0.750 inch………b

Hi Bodge , Thank you perhaps this will help the odd thing is that it came with what looks like a Myford M Lathe chuck Plate that fits it it has V 1012 on it. Can this be identified

[HopperParticipant @hopper]

I have spoken to Axminster and they recommend 1.0hp on everything now even grinders. Supermarket have now also stated to me in a phone call that this drive motor combination is not sufficient and has a few hundred watts to cope with tool on material by email.

Sounds like they are using the same Chinese ponies as the makers of those air compressors that come labelled boldly "2.5hp". In a pig's ear they are. You look at the size of the motor and compressor and they are not even close.

The old timers used to run 3.5" Drummond and Myford lathes on 1/4hp motors from old washing machines. But they were real horsepower in those days I guess.

Edited By Hopper on 30/04/2016 13:28:43

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Hopper on 30/04/2016 13:27:37:

The old timers used to run 3.5" Drummond and Myford lathes on 1/4hp motors from old washing machines. But they were real horsepower in those days I guess.

.

Many a true word … Hopper

But we must also remember that they were using real [mechanical] speed reduction, not just slowing the motor down by electro-magic.

MichaelG.

[bodgeParticipant @bodge]

But we must also remember that they were using real [mechanical] speed reduction, not just slowing the motor down by electro-magic.

MichaelG.

As it happens thats exactly how mine runs with a counter shaft , and with 200 watt chinese motor that came of one of those small hobby bench drills, works fine, just need to cut the second step on the motor and counter shaft pulleys so as to give six speeds + six more with the back gear, will set it up for a top speed of around 650ish rpm. The motor & counter shaft assy hangs out behind the head stock, works the same way as myfordboys ml/speed 10 using over centre eccentrics to release both belts also working as belt slip type clutch. Theres another chap on this forum with more or less same, type of set up, he posted under the handle of Nobby & had a few pics in his album, havent seen any post from him for awhile though,( hope you are OK Nobby if your reading this).

Martin, at a guess i'd think the numbers on your back plate pic would indicate 1inch od by 12tpi, were early Drummond m types that size ?. I think the latter Drummond/myford were the usual 11/8x12tpi with a plain register ie not stepped like ml7. I tried to mount motor under the bench cos i would have liked to have kept the cast iron tray, did get it going that way for awhile but wasnt really happy with it, its much better how it is now. I think you have done pretty well to track down the castings & gears for the tumbler reverse though, i`d pretty much resigned myself to mowing them out steel if i ever get round to it. The head stock you have pre dates the production ones so would not take things for granted as regard to spindle size…….b

[Martin NewboldParticipant @martinnewbold]

Hi Bodge , yes i was originally going this route making the shapes from mild steel for the tumbler but it was quite a bit of milling and one of the forum members put me in touch with a lovely chap who had castings and smaller gears . He has been very well informed and nice and I am pleased with the castings and gears.

I put up the back plate on here as was hoping someone could identify it from the numbers as I could only give the information I have it is around 1" or just under. I know my machine has been changed but not used by the previous owner for at least 50 years or so so the changes or any changes predate this date. Its pretty much as it came and made the table etc to mount it on. I believe he built it from an sale of a closing shop many years before.

Am really disappointed with the seller of the motor / inverter / brake none of this expensive kit has worked at all well with no torque really being apparent. My Drill has more torque than this .

The foolhardy person who doesn't listen at supermarket and a director said 1:1 pulley will produce no torque . Go figure don't have a 1:1 pulley arrangement at all.

I agree Hopper there is so much Chinese pony rubbish in our country now.

I put it under as this lathe was supposed to be driven like this originally. The supermarket jokers also said I needed a 1.0 hp set up am just going on with this reverse tumbler until i can find something that works to drive the lathe . I pretty much think its because its £200.00 and Chinese kit that it doesn't work but am hoping to find out why it doesn't the inverter is with AAB for testing .

The Motor is still with me until i can get TEC Electronics to look at it . I had a long conversation with the manager on Friday and they seemed very reasonable and understood the problem I cannot understand why the supermarket people could not get this from her call.

Kind Regards

Martin

Edited By Martin Newbold on 30/04/2016 21:06:48

[Martin NewboldParticipant @martinnewbold]

Kieth, Bodge ,

I read something on one of the posts and/or pieces of paper that I have been collecting that you can also convert a reverse gear so have found one on eBay to try but am not sure it is 3/4" but 5/8" but was a snip so worth a look and hopefully might be less time making one that that hard steel. wont come till next week. Will hopefully have made some inroads on the back L piece on Tuesday in a friends workshop

[bodgeParticipant @bodge]

Hi Martin Sorry about all your motor / inverter problems, cant help you on these matters as i fall in the old timers way of doing things like drives, with motors & counter shafts a couple of spare belts cost very little and takes up next to no room. I guess its horse for courses, but i like the low speed torque one gets with a counter shaft, as to the back plate have you tried a 12 tpi thread gauge? I tried to up lode a pic or two this afternoon, followed the instructions in the faqs, made the album ok but danged if i can get the pics from the folder to the album, and now the phone cum camera say usb not allowed, i like computers about as much as i like inverter / vfd drives which is not a lot. Anyway hope you get the problems sorted as soon as pos,…..regards …..bodge

ps would like to know how you get on with making tumbler reverse, and maybe some pics in a future posts……b

Martin have read your last post with the pic of reverse shaft, i made one quite while back, the smaller dia of the shaft as show`n should be 5/8 running fit in the gear wheel, its usually called the reverse stud, by the L shaped bit do you mean the banjo arm?………b

Edited By bodge on 30/04/2016 22:48:02

Edited By bodge on 30/04/2016 22:53:51

Edited By bodge on 30/04/2016 23:00:31

[Martin NewboldParticipant @martinnewbold]

You have IM bodge

[Martin NewboldParticipant @martinnewbold]

Hi Kieth , Bodge , I did some work on the back section of the casting of the tumbler this week . It pretty much went ok but the casting on the inside is not central as i anticipated. I am reasonably please with it I havent drilled out to 3/4" yet just 1/2" I was awaiting the reverse stud to see if it was indeed 3/4" which it is as I have now received it :

[bodgeParticipant @bodge]

Hi Martin, Nice pic, its all looking really good !. any good news on the motor drive ? ,check your in box pm`s sent .

Regards………….b

[Martin NewboldParticipant @martinnewbold]

Not yet Bodge , had a strange email from the supermarket lot with what looks like a returns note for it to be trashed. Have not heard from TEC or ABB.

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