Thread: knocking noise on lathe!

Yet again there is still a knocking sound in the lathe but the bearings are new now so not sure what it is doesnt seem to be causing anything drastic so as they said its normal? lol ok well I will accept that maybe that model is like that?

Mrs B,

Mine makes some noise , I believe that this style of machine does, some of the noise is from the belt &pulley's and some from the motor fan.

I would check all of the following:

1 belt cover
2 motor mounting bolts
3 head stock clamp (tight)
4 all bolts in frame holding bed to frame and legs etc ( though I do not think these will cause the noise)

I notice a rattle in the lower speeds, but this disappears when speed control is above 3-4 .

See how it goes for a week then re-evaluate .

Cheers,
jeff

Originally Posted by vk4

Mrs B,

Mine makes some noise , I believe that this style of machine does, some of the noise is from the belt &pulley's and some from the motor fan.

I would check all of the following:

1 belt cover
2 motor mounting bolts
3 head stock clamp (tight)
4 all bolts in frame holding bed to frame and legs etc ( though I do not think these will cause the noise)

I notice a rattle in the lower speeds, but this disappears when speed control is above 3-4 .

See how it goes for a week then re-evaluate .

Cheers,
jeff

Yes your right Jeff mine does the same, I've check all of the above all is fastened and all good, so I'm thinking maybe thats just the way these ones operate, thank you for your response to this.
Cheers

Nerves and tool rattle on the tool post or is it your knee's knocking

No problems , owners of these machines , as with all different brands need to communicate so we know what is going on with our machines .

Good turning

Jeff

Your so right vk4 and it is real helpful too especially for people like me...oh and by the way the one at the club is making noise too now I DIDN'T DO IT!!!
And Wheelinround? I'll never tell you my weakest points anymore leave my knees alone, you nearly gave me a heart attack the other day I think I'd drop on the spot if they ever asked me to demonstrate way

One other possibility: the cowling over the fan at the end of the motor.

These are usually held on by only 2 or 3 small screws - mine haa 3 - and if one vibrates out, as they do about every 6 months, my lathe starts making all sorts of weird'n'wunnerful noises.

It took me forever to work out what was causing it the first time, as the errant screw was off the bottom of the cowl, where one would never normally see it.

A way to inexpensively find noises is to make a 500mm stick , 12mm or so in diameter with a nice smooth end. Place the smooth end against your ear canal and the other end on any part you want to listen to.

You can hear your lathe and motor bearings purring or grinding as the case may be, or any knocking , rattling, or thumping.

One can buy mechanics stethoscopes but I have found this works as well.

If working close to a rotating pulley or chuck, place the stick so that it will be knocked sideways if it should slip and touch the rotating part.

Do not place the stick in a position where it may be driven into your head.

Sometimes thumping sounds will come from something stuck on a V-belt or pulley, or a chunk out of a V-belt or pulley, or a sticky place on same.

If a V-belt is old and has been setting in one place a long time it may have developed 2 bends and 2 straights, which may resist going around smoothly.

If your shed is cold it may do the above until the belt warms a bit.

Originally Posted by Mrs Blackie

Your so right vk4 and it is real helpful too especially for people like me...oh and by the way the one at the club is making noise too now I DIDN'T DO IT!!!
And Wheelinround? I'll never tell you my weakest points anymore leave my knees alone, you nearly gave me a heart attack the other day I think I'd drop on the spot if they ever asked me to demonstrate way

Tell me the whole of Blacktown was wondering what the strange tap tap rattle sounds been to find out its ya knee's rrflmao
all fixed your booked to demo at Trend nah just joshin Although Bill did say he'd ask and thought your work was worth seeing being made just to show up the fellows.

Hope to see you thee or at H&F's the week before

Thanks Guys! I just cant place where the sound is coming from, I know its coming from around the pully closest to the motor Ive checked all I can, I give up Imma turn till it drops, its driving me crazy trying to find out what it is so Imma shoot the sucker!!!

Hahaha and Wheelinround? You trying to give me a heart attack? like I said I'm fine when no ones watching lolll as soon as Bill looks at me I'm rattling at the knees lol, Im starting the faceplate course there on Monday night I can't wait. See you at the H&F or Trend Days.

Cheers!

Have you checked that the motor pulley is tight?

Mrs B,

It sounds like belt slap, at the pulley, I would say that you could play around with the spring tension.

This could help as the plates would move a little differently.
Less tension and the plates move apart easily, more and they are stiffer / harder to move ,.

You would need to change the spring , do not modify the original spring.

Jeff

H&F took the whole head with them to fix it thats what I dont get didnt they notice this? lolll then when I told him he said was all good as soon as I go to 4-5 it stops, willl look into it again and see what else can do thank you for your tips vk4 and .
Cheers!
Ayshen

HI Mrs B,

I did my regular maintenance on the Lathe today, I took off the belt guard, and while there ran the lathe in low speed.

I can hear a slight rattle which disappears at higher speeds, I believe that it is only the belt and pulleys .

I would not be too worried , just use the Lathe and do that wooddo that you do best ( a bit of plagiarism there with poetic license).

What do you think of the shed??

Jeff