How is it done ?,

[Charlie,Participant @charlie18171]

[Charlie,Participant @charlie18171]

Hi Chaps,

Must be somone here who knows how its done,I have a Myford

super 7,And on the tumbler reverse two tuffnol gears,One of the gears has

a single tooth missing,I have a new spare, Have removed the whole tumbler

reverse unit but cant see how to remove the the damaged gear, It looks like

it is a force fit in the unit,Dont want to get violent with it but is this a big hammer

and a drift job???,

[blowlampParticipant @blowlamp]

I *think* there is a grub screw to lock the shaft into position.

 

 

Martin.

[Charlie,Participant @charlie18171]

Hiya martin,

Yes there is a long grubscrew with a locking nut that holds the whole

tumbler reverse unit in the lathe,But my problem is how to remove

the spindles on which the tuffnol gears run from the unit once i have it

out of the lathe,But thanks for your input so far,

[blowlampParticipant @blowlamp]

Charlie.

 

Yes, I understand that.

Is there an Allen key type of grub screw through the side of the body that secures the spindle?

 

 

Martin.

[John Stevenson 1Participant @johnstevenson1]

The spindle holding the Tufnol gear on is just a press fit.

 

John S.

[Charlie,Participant @charlie18171]

Martin

No, once the unit is out of the lathe i can see no means of securing the

spindles to the unit,They seem to have been forced in or shrunk in, I can

see no way of removing them that dose not involve using a certiain amount

of force, And i am reluctant to use force, But there must be a way, I canot

be the first person to want to replace one of the tuffnol gears

[Chris TriceParticipant @christrice43267]

I think you missed John’s post above.

 

[Charlie,Participant @charlie18171]

Yes Chris

you are right i did miss it, No excuse cept im old and its late, And

thank you John A press fit, That is basicaly what i wanted to know

Very gratefull for the input chaps thanks all,

[MikeParticipant @mike89748]

Charlie: I had just this problem on a Myford I once owned. Got the spindle out OK, but pressed it back too tightly. Result was that next time I used the lathe on a high speed, the heat of friction set the oil on fire and burnt the new Tufnol gear, so it was back to square one… I was more careful second time around!

[Joseph RamonParticipant @josephramon28170]

Mike

 

You are Chuck the Muddle Engineer and I Claim My Five Pounds

 

 

Joey

[KWILParticipant @kwil]

Please also be aware that when securing the long grub screw, only take it to the point where it “holds” the unit in place, any further pressure not only makes the operation of the tumbler arm tight, it can also eventually force out the spindle which is a press fit as well.

[Charlie,Participant @charlie18171]

Thanks chaps

In spite of there being just one tooth missing on the gear wheel

everything is running well, Its just the damn ticking that gets me

down,Going to have to bite the bullet and do the job somtime soon

Charlie,

[Author]

Posts