Super 7 clutch

This topic has 10 replies, 5 voices, and was last updated 5 January 2014 at 10:13 by Robbo.

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31 December 2013 at 22:36 #139295
Jerry Halcomb
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@jerryhalcomb16100
Well I solved my Dickson tool post dilemma now I have another question. I do hope you all have some sympathy for me. My lathe was just purchased as I stated in my Dickson post and I have it up and running. My question is how noisy is the Clutch supposed to be? Mine seems really loud. I seems to run fine and engages alright but is noisy to me. Is this normal? It does quiet down some what when I loosen the belt somewhat.

I am adding that the lathe is a 1976 or so model. It has the power cross slide and a quick change gear box.

Thanks for any help in this matter.

Jerry Halcomb

Edited By Jerry Halcomb on 31/12/2013 22:38:43
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31 December 2013 at 22:36 #23045
Jerry Halcomb
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@jerryhalcomb16100
1 January 2014 at 10:35 #139319
Robbo
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@robbo
Jerry,

Happy New Year from the UK

I have found that when running on the high speed pulley the noise increases disproportionately. On the low speed almost silent, high speed very audible.

The clutch itself shouldn't make a noise, unless it is slipping. Lubrication of the actual clutch cone is recommended by Myford – seems strange but true .

If the noise lessens when the belt is slacker it would seem to be coming from the bearings. The pulley itself has 2 ball races, which are sealed for life, the countershaft bearings are sintered bronze lubricated from the oil cups on the front of the countershaft casting, these should be topped up regularly. There is a thrust bearing (single ball race) next to the pulley which is lubricated by "overflow" from the left hand countershaft bearing.

There is no harm in lubricating these bearings externally to make sure they are oily

Running on high speed also produces more noise from the rear spindle bearings, oil via the nipple on the left hand side of the headstock casting..

Do you have the relevant manual for the machine?

Phil
1 January 2014 at 11:13 #139328
Robbo
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@robbo
This may help:
1 January 2014 at 11:34 #139337
Jerry Halcomb
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@jerryhalcomb16100
Phil

Thank you for all the help. I "think" I may have an answer to what the noise is. I'll will investigate further and return with any answers.

I appreciate the good wish for 2014.

Happy New Year to you and yours

Jerry
2 January 2014 at 23:30 #139495
Jerry Halcomb
Participant
@jerryhalcomb16100
Phil

I solved my problem. I think that number one the motor has the beginnings of a bad bearing. The noise is traveling through the lathe and making it seem that it is coming from the clutch. The motor was a replacement that doesn't have a resilient mount, therefore any noise generated from the motor is magnified and transferred to the rest of the lathe.

Thanks for all you help

Jerry
3 January 2014 at 08:45 #139508
john fletcher 1
Participant
@johnfletcher1
Regarding your motor not having resilient mountings.I had the same problem, I took the motor to the car motor factors and bought 2 rubber ring type mountings which fitted over the electric motor end bearings. I had to do a bit of fitting up type of thing.Then I copied the motor to lathe mounting platform as pre Myford, that was about 12 years ago. It certainly quiet things down. I left the original welded on motor plate, it all fitted in OK. The total cost was £2.25 well worth it. If you do make a base don't forget the earth connection, motor to base , base to lathe etc.Ted
3 January 2014 at 11:26 #139526
Ian S C
Participant
@iansc
Another way of isolating the motor is to mount it on a rubber pad, and use smaller bolts to secure it, with rubber bushes in the holes, there was an article about this in ME maybe 20 years ago. Ian S C
4 January 2014 at 15:30 #139658
Jerry Halcomb
Participant
@jerryhalcomb16100
I am in the process of looking into a 3 phase motor and using a VFD with my setup. I hope this helps solve my problems. I have a spare 3 phase motor here on the farm so I can use that and buy a VFD. I have read some good reports on using this sort of set up.

Jerry
4 January 2014 at 16:02 #139660
jwb
Participant
@jwb
Jerry

With a working clutch and a VFD you'll be in Super Seven Heaven. My 3-phase motor doesn't even need to be resiliently mounted, it's so quiet and vibration-free.

Good luck
John
5 January 2014 at 10:13 #139719
Robbo
Participant
@robbo
Jerry,

Yes, motor bearings can be a problem, on the older motors that require oil lubrication via an oil cup on the bearing mounting. That's fine when the motor is the right way up, but the Super 7 has it mounted upside down!

You will love the three phase option.

Phil
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