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Old 03-27-2015, 01:58 AM   #31
simister
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Sound like the one they recommend. I think because the lathe is sold as being for 12mm tooling. I've kept with 12mm as I had it for my last lathe. I have a couple of 16mm tools and they work fine on this toolpost. I thought I might need to machine something off the bottom of the holders but so far so good!

The massive 25mm boring bar I got from CTC that fits the BXA holder is absolutely awesome! SO rigid!

I rarely turn my toolpost but it is handy to have the spanner there. I used to do it a fair bit to chamfer after facing but now I use a 45 degree neutral tool. Sometimes I remove it if its in the way as the bolt holding it on is only finger tight. I usually align it using a small set square against the back face.
Hi Rod,

I get the 320 delivered next week. I was waiting for the H&F sales.

I have purchased the bolt for the QCTP. However, I would like to know what length of shank you ended up with. I was wondering if I need extra length on the 10 mm tap to be able to reach far enough. I haven't got the lathe here at the moment so I am not able to check it.

Thanks John


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Old 03-27-2015, 12:08 PM   #32
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Hi Rod,

I get the 320 delivered next week. I was waiting for the H&F sales.

I have purchased the bolt for the QCTP. However, I would like to know what length of shank you ended up with. I was wondering if I need extra length on the 10 mm tap to be able to reach far enough. I haven't got the lathe here at the moment so I am not able to check it.

Thanks John
John, I just measured things for you. The 16mm shank is about 94.5mm long. The large hole in the bolt is 48mm long and the stud on the 320 is 69mm long and the M10 thread is 29mm long.

An ordinary M10 tap is about 70mm long to the square shank. So a bottoming tap will cut a thread long enough if you screw it in as far as you can so the square shank is part way in the hole. I had a long shank drill bit and i drilled the bolt M10 right through but it was not necessary to go right through. An ordinary drill bit will drill far enough from the head end to meet the larger hole.

My bolt got tapped from both ends when I added the ring spanner later on.


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Old 03-28-2015, 01:55 AM   #33
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Hi Rod,

That's great, thanks for going to that trouble for me.

I have ordered some 10 mm taps from CTC Tools and I have already got the bolt. I am hoping to get the lathe delivered on Thursday. I will start the modification to QCTP as soon as I receive the taps. I will let you know when I have finished.

I appreciate your help. John
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Old 04-01-2015, 06:02 AM   #34
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John, I just measured things for you. The 16mm shank is about 94.5mm long. The large hole in the bolt is 48mm long and the stud on the 320 is 69mm long and the M10 thread is 29mm long.

An ordinary M10 tap is about 70mm long to the square shank. So a bottoming tap will cut a thread long enough if you screw it in as far as you can so the square shank is part way in the hole. I had a long shank drill bit and i drilled the bolt M10 right through but it was not necessary to go right through. An ordinary drill bit will drill far enough from the head end to meet the larger hole.

My bolt got tapped from both ends when I added the ring spanner later on.
HI Rob,

I have now received the Al-320 and ready to unpack and move into my workshop. I was reading the manual regarding the headstock and wondered what type of oil you are using to top up and change when required?

I have read that you can use hydraulic tractor oil. I have some of this oil, however, I thought I would check first to see if it is ok to use.

Regards, John
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Old 04-01-2015, 07:34 AM   #35
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Hi John, hydraulic oil is fine for use in head stocks and the saddle as well.

Paul.
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Old 04-01-2015, 05:59 PM   #36
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Hi John, hydraulic oil is fine for use in head stocks and the saddle as well.

Paul.
X2 Hare and Forbes sell it for that purpose as well. My lathe has been running it in the headstock and all over the ways since new as my filler bung broke and it dropped the oil on day 1.
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Old 04-01-2015, 09:46 PM   #37
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OK great, Thanks guys
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Old 04-08-2015, 05:40 AM   #38
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Hi Rod,

I finally got the lathe up and running. I made the QCTP chicago bolt today and it turned out great.

Thanks for your help and posting your experience. Simple to make and does the job perfect.

John
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Old 05-01-2015, 02:12 AM   #39
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You guys must get sick of seeing these sort of posts, but here is another one!

Hare & Forbes wanted AUD $500 for a QCTP (I think it is a Dickson Style). The salesman reckons no one bothers to buy it as it is a major job to fit it to the AL320G that has a tool post like this:

Hi Rod,

I have the same lathe and want to do this to mine as well but its different than yours ? Here are some pictures of it but I don't know if the QCTP will fit as it has a shoulder attached to the top of the X/slide where the QCTP would go ? Dose that QCTP of yours have a hole in the bottom of it that would fit over this shoulder thing ?
Attached Thumbnails
IMG_20150501_115913_703[1].jpg   IMG_20150501_115948_822[1].jpg   IMG_20150501_120001_279[1].jpg   IMG_20150501_120017_161[1].jpg  
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Old 05-01-2015, 10:26 PM   #40
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What is the diameter of the boss? If it is 16mm or less, the QCTP will fit over it, if not, it looks like you have an exercise with a 4 jaw chuck to bore the recess in the QCTP holder. From what I've heard, they are hardened on the outside but once you get through that, they'll machine OK.


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