what can I do to a bent tone arm

audio3chung · 1st October 2006, 10:10 AM

Hi everyone, I have got a thorens TD160 with a original tonearm
but sadly bent at the rear part, should anyone has the same experience and tell me what can I do, to find another thorens tonearm in HONG KONG is quite difficulty.
I perfer to disassembly it and re-straight it.
Thanks,
CHOW

pinkmouse · 1st October 2006, 11:32 AM

The first thing I would do is strip it down completely then you can see what the real damage is. What's the arm made of?

Zen Mod · 1st October 2006, 01:55 PM

yes you must strip it down ,then look what you can to repair damage
post picture when you dismantle it .
be careful with bearings and wiring

to pink-Thorens,alu tube.

bulgin · 1st October 2006, 06:15 PM

Hi Chow

This looks like a nice enough arm to have a go at fixing. The armtube looks like a thinwall alu tube?

Depending on how the armwires enter the armbase (by plug and socket or directly), you'll have to remove the complete arm from the tt. Once this is done, remove the armweight. Is there a spiral grooved plastic stub for the weight at the back? If the stub is hollow, there'll be a selftapper inside to remove the stub. There should be 5 wires in the armbase: red, green, white and blue and a 5th, which should be black, connecting the armbase to the armtube itself.

Once you have removed the arm from the tt, removed the weight stub etc, try to post more pics like the esteemed pinkmouse suggested, so we can assist you further.

Whatever will have to happen, the armwires will have to be removed from where they could get damaged. Most likely, the armtube will also have to be removed from its pivot. With a little bit of luck, a tube bending spring could be inserted and the bend carefully pressed in a soft jaw vise or a lathe headstock chuck for better trueing.

Good luck

bulgin

audio3chung · 2nd October 2006, 02:24 AM

Thanks for your suggestion, I think it is worth to have a try, will post pict once I have strip it down.
Regards,
CHOW

audio3chung · 2nd October 2006, 10:13 AM

BTW If someone can poitnt out where can I get the assembly
diagram of this tonearm( I dont know the exact model, maybe a
TP16).This surely will make the job more easy.
Thanks,
CHOW

mpm32 · 2nd October 2006, 02:05 PM

If possible, strip the arm down so that you just have the tube. Plug one end and fill the tube with moist fine sand. Pack it in there good. Plug the open end. Now you can bend the tube without fear of crimping it. I have used this method on tubing successfully several times.

audio3chung · 2nd October 2006, 02:43 PM

Yes, it looks like a most safe way to bend or straighten a hollow tube, surely I will take a try provided I can de-assembly the tone arm.
Regards,
CHOW

thoriated · 2nd October 2006, 02:49 PM

It looks like it ought to be fixable (with care). I would check to see if there is any associated bearing damage to be repaired, too, since it probably took a pretty good whack to bend it that much.

audio3chung · 8th October 2006, 04:44 AM

Hi,
I have strip the tonearm and find an arm tube like this,
I manage to make it quite straight and assembly the whole thing, it now play LPs well, but can any one tell me where can I get a 50Hz motor pulley for the TD160 because I get one TT with 117v 60Hz motor, how stupid I am.
Thanks
CHOW

1st October 2006, 11:32 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	The first thing I would do is strip it down completely then you can see what the real damage is. What's the arm made of? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

1st October 2006, 01:55 PM	#3
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	yes you must strip it down ,then look what you can to repair damage post picture when you dismantle it . be careful with bearings and wiring to pink-Thorens,alu tube. __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

1st October 2006, 06:15 PM	#4
bulgin diyAudio Member Join Date: May 2006	What can I do to a bent tonearm Hi Chow This looks like a nice enough arm to have a go at fixing. The armtube looks like a thinwall alu tube? Depending on how the armwires enter the armbase (by plug and socket or directly), you'll have to remove the complete arm from the tt. Once this is done, remove the armweight. Is there a spiral grooved plastic stub for the weight at the back? If the stub is hollow, there'll be a selftapper inside to remove the stub. There should be 5 wires in the armbase: red, green, white and blue and a 5th, which should be black, connecting the armbase to the armtube itself. Once you have removed the arm from the tt, removed the weight stub etc, try to post more pics like the esteemed pinkmouse suggested, so we can assist you further. Whatever will have to happen, the armwires will have to be removed from where they could get damaged. Most likely, the armtube will also have to be removed from its pivot. With a little bit of luck, a tube bending spring could be inserted and the bend carefully pressed in a soft jaw vise or a lathe headstock chuck for better trueing. Good luck bulgin

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2nd October 2006, 02:24 AM	#5
audio3chung diyAudio Member Join Date: Sep 2005	Thanks for your suggestion, I think it is worth to have a try, will post pict once I have strip it down. Regards, CHOW

2nd October 2006, 10:13 AM	#6
audio3chung diyAudio Member Join Date: Sep 2005	BTW If someone can poitnt out where can I get the assembly diagram of this tonearm( I dont know the exact model, maybe a TP16).This surely will make the job more easy. Thanks, CHOW

2nd October 2006, 02:05 PM	#7
mpm32 diyAudio Member Join Date: Dec 2003 Location: New England	If possible, strip the arm down so that you just have the tube. Plug one end and fill the tube with moist fine sand. Pack it in there good. Plug the open end. Now you can bend the tube without fear of crimping it. I have used this method on tubing successfully several times.

2nd October 2006, 02:43 PM	#8
audio3chung diyAudio Member Join Date: Sep 2005	Yes, it looks like a most safe way to bend or straighten a hollow tube, surely I will take a try provided I can de-assembly the tone arm. Regards, CHOW

2nd October 2006, 02:49 PM	#9
thoriated diyAudio Member Join Date: Nov 2003 Location: flyover country	It looks like it ought to be fixable (with care). I would check to see if there is any associated bearing damage to be repaired, too, since it probably took a pretty good whack to bend it that much.

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