Inherited Problems

Hi David,
I am a bit confused about the problem. You seem to be talking about ordering a chuck but I can not see any post to say that you have removed the old chuck to measure the taper. I would have thought that you would need to measure the taper BEFORE ordering a chuck.

Les.

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Please Sir ... it woz him wot started it !!

Same old same old, more than three years now and the basic web site problem still not rectified. Same as post numbers, or lack thereof.

Regards Ian.

Edited By Circlip on 25/01/2015 09:27:27

Hi Folks, Thanks for all the information regarding the taper for this chuck. The nearest I can find to match the drill is JT6. As I said the chuck has RJ6 scribed on it this seems to be my best clue. After a bit of cleaning up I realise I was wrong with the make..The data plate on the side of the head say J Sanders, 1982, not Saunders as I first thought. The bench grinder that came from my fathers workshop is the same make. I have ordered a keyless chuck from Chronos this afternoon so I hope its correct.

David,

Are you really sure that the marking is RJ6 not B16

The link that I posted was specifically for Rexon chucks.

MichaelG.

I'll correct my earlier comment about B tapers.

B10 = small end of MT1

B12 = large end of MT1

B16 = small end of MT2

B18 = large end of MT2

B22 = small end of MT3

B24 = Large end of MT3

The number after the B is the diameter of the large end of the taper to the nearest mm, and 'about' 1mm larger than the large end of the socket (~2mm in the case of B22 and B24).

Neil

Re the question about inserts, have a look at **LINK**

If you have an existing insert you can measure up you should be able to find something that will fit.

eg a TCMT09 02 04 should be a triangular insert, 9 mm along the edge, 2.38 mm thick and with a 0.4mm tip radius.

a CCMT06 02 04 is an 80 deg diamond shape, 6mm edge, 2.38 thick and 0.4 tip. (These just happen to be the two tips that I use, the link explains what all the letters and numbers represent).

For some reason my link isn't showing?. Go to https://www.carbidedepot.com/formulas-insert-d.htm

edit - maybe that's how links are displayed here??

Edited By Steve Pavey on 26/01/2015 18:20:47

I had one of those bright ideas today. The chuck for the mini Lathe has B16 stamped on it and it wont go on the stub in the drill. I took the drill chuck to work today to give it a good clean up and as I thought it says RJ6-13 on it. As I said I will try the JT6 from Chronos. I am starting to think I might upgrade my workshop . I had an ML2/4 before I had a break from model engineering. My father had an ML7 with a long cross slide and a few other simple modifications that kept him going for years. I could justify the cost of a decent one as an early retirement present maybe. The Super 7 seems a bit pricy for occasional use.

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David,

Sorry if [as it appears] I was trying to lead you astray with the B16 suggestion.

Best guess now, is that the R stands for Rexon, and the J6 for Jacobs [Taper] 6.

... Hopefully you are on to a winner.

MichaelG.

If you insert a link the default is to display **link** if the text matches the URL. You can edit the text to anything you want, I often remove the HTTP bit and add ... in the middle of long links.

Neil

At last I have a result regarding the drill chuck.,it was JT6 . New keyless chuck from Chronos for £21 is a good result after a bit of a search. Now I can get some holes drilled the block for the clayton. Still thinking about an ML7.