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Hi Guys
Long time browser, first time poster.
I picked up an old Richardson Drill and am wondering how (and if) the tapered arbour is able to be removed ?
I have got a 16mm chuck that I want to fit on, but the current taper is too small.
I don't want to go tapping with a hammer in case it isn't designed to come out.
If anyone has any idea, please would you enlighten me!!
I have attached some pics.
Thanks in advance.
Matt
Looking at the pictures provided, I see a large diameter quill (bit that slides up and down with the feed, but does not rotate) and a moderately sized spindle (that rotates) within it. The spindle has a few turns of thread, and appears to have a chuck taper at the lower end.
I would be fairly certain that the unit does not have a removable Morse Taper socket in the spindle. This is based on the diameter of the spindle, and the absence of a set of drift slots in the quill.
There are a number of chuck tapers used depending on machine/chuck manufacturer and chuck size. It is essential to match the socket in the chuck to the taper on the spindle. Did the unit come with a chuck fitted to the chuck taper? If so, unless it manifestly inaccurate, it is probably your best bet for a chuck, unless you can get very definite information on the chuck taper machined onto the spindle and go to an industrial supply place to purchase a replacement.
You mention a 16mm chuck in your post, but I would suggest an upper limit for about 3/8th inch or 10mm as the unit has a limited speed range (4 stepped pulleys each end is 4 speed) and in the range of approximately 0.5 to 2 x motor speed. Typically motor speed would be 1440 or 2880 RPM, so the speed range would be approx 720 to 2880 RPM or 1440 to 5760RPM. For the lower range 10mm would be a upper limit based on the speeds available, while for the upper range 6mm is a reasonable upper limit.
Hello Matt,
The taper is a Jacobs taper, either 3JT or 6JT, and was for a 1/2'' Jacobs chuck. You can determine which by measurement and reference to a machinery manual, or possibly Google. There should be a nut on the thread above the taper, its purpose is for chuck removal. The taper is part of the spindle, not removeable.
As sold, the machine had a 1420 rpm 1/2 hp motor with a six step pulley, giving spindle speeds from 350 rpm to 5500 rpm. Hope this is of some use.
Regards,
Chas.
Thank you for your replies!
Purchased a suitable chuck yesterday.
Matt