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Member postings for IRT

Here is a list of all the postings IRT has made in our forums. Click on a thread name to jump to the thread.

Thread: Correct use of slitting saw for deep cut.
05/01/2020 19:04:48

A new saw and arbor arrived from Arc this week.

I used the vertical mill, and made the cuts in one pass.

Two 1/32" slots, 0.875" deep cut without any issue.#


29/12/2019 23:11:37

I am trying to cut a deep (0.875" slot in 5/8" steel. The slot needs to hold a hacksaw blade.

My first attempt with a slitting saw ended with the slot wandering off. Not a great surprise as the saw had a pronounced dish to it before I started.

I have just ordered a new saw and arbor from ARC (not the supplier of the original).

There seems to be a lot of conflicting information on how to use a slitting saw.

What approach should I take to have the best chance of achieving an accurate slot? Plunge from the end, plunge from the side a full depth or multiple small depth cuts from the side?

I suppose there is a 4th approach: the hack saw. This is the last resort.

Thread: Warco GH600
04/12/2019 14:39:04

I purchased the 125mm collet chuck from ARC and it arrived today. It dropped straight onto the GH600 spindle flange without the need for a back plate. Measuring on some ground stock where it leaves the chuck, I can only measure 0.01mm deflection when I turn the spindle. This measurement is repeatable if I remove the chuck and refit it in the same position. The other two possible orientations are not as accurate, but still only show up to 0.02mm deflection.

I was only half expecting it to fit without a plate, and I wasn't expecting it to be that accurate.

Nice when things go right!

Thread: Breaking bandsaw blades
03/12/2019 12:40:39

I seem to remember hearing somewhere that the biggest cause of breaking blades was over-tensioning them.

Thread: Precision Tool Vice Type 2
25/11/2019 20:25:17

Bolt shortened and vice bolted on and re-aligned.

I will keep a close eye to make sure no more damaged is done.

Thanks Phil for highlighting the issue before I done any more damage.

Thanks also to the people who gave constructive advice.

Thread: Warco GH600
25/11/2019 20:21:16

The red ball on mine is 4" above the tray when the lathe is running.

Have you got something else wrong that allows the lever to drop so low?

Thread: Precision Tool Vice Type 2
25/11/2019 14:02:18

I did only say 'tempted'. I only found the problem late last night after reading this thread. I will have a proper look at the vice when I get home tonight. Appeciate the advice and pictures Jason. Ta.

25/11/2019 12:38:53

I have the same model as you Lofty. It is a shame as I have found the vice very accurate, but I am tempted to move to another vice to ensure it cannot happen again. Off to search the old 'which milling voce posts now.

Edited By Ian Thomson 2 on 25/11/2019 12:40:05

24/11/2019 22:16:20

Not happy though. I was not aware when I was doing it that anything was wrong. I will have a better look tomorrow, but if it is this easy to use wrong it will probably happen again.20191124_220556.jpg

Edited By Ian Thomson 2 on 24/11/2019 22:18:11

24/11/2019 22:00:38

I have only had my mill a couple of months. I noticed a mark on the table when I moved my vice a few weeks ago.

I just had another look after reading this thread, and I can see a number of marks.

I suppose I should be pleased that now I am aware of the issue.

Thread: Warco GH600
19/10/2019 20:49:09

I too am happy with mine.

I have had the gears jump out a couple of times - 800rpm seem to be the problem one. It is very hard to know when it is properly engaged. Position 5 can be a bit difficult when selecting the lead screw too. I think it is a knack that needs to be learnt.

Yesterday I fitted a QCTP I got from RDG tools at the show.

I took a different approach to fitting it to you Brian - I bored out the body to fit the existing post.

This allows me to use the old tool post too if I have to, and should not effect any Warco warranty.

I have been using the lathe all day today. So much faster and easier to change tools now. More time spent doing the fun stuff.

I have kept the chuck guard, but the light does need moving.

I suppose I should be thinking about an oil change soon?

19/10/2019 14:50:09
Posted by Ian Thomson 2 on 18/10/2019 20:46:05:

I asked the same question on this thread on 11/8. I still havn't found a lock.

It hasn't caused me any problems yet, but I would happier if it could be locked solid when not in use..

Sorry - I did not ask the same question at all. I previously asked about the cross slide that I cannot lock.

The saddle is locked as Jed has explained.

Howard, do you have a picture of the leaf screw you talk about so that I can see if the GH600 has the same?

18/10/2019 20:46:05

I asked the same question on this thread on 11/8. I still havn't found a lock.

It hasn't caused me any problems yet, but I would happier if it could be locked solid when not in use..

Thread: Bearing fit
18/10/2019 17:02:11

I will start you off easy - they will get harder.

18/10/2019 16:51:56

That was fast!


18/10/2019 16:41:29

I am staring to build the Myfordboy's hacksaw.

My first proper project. Expect quite a few questions to come...

My first one regards the fit of a bearing - both into a housing and onto a shaft.

I far as I can understand, the published tolerances are in a few um for small bearings. I cannot even measure down that small.

Would an acceptable approach be to machine to allow an easy press fit by hand then fit with a retaining compound like Loctite 641 or is there a better way?

Thread: TCT show at the NEC 24-26 September
12/09/2019 20:24:10

Well worth a visit to this one in a couple of weeks if you are interested in 3D printing. Free to get in too.

Thread: Anyone made Myfordboy's powered hacksaw?
12/09/2019 19:40:20

It looks good!

Are you please with the accuracy of it?

I am expecting to take far more than 2 weeks with my build.

08/09/2019 22:35:06

I need to cut metal, am short of workshop space, and am looking for a project... Myfordboy's powered hacksaw looks ideal.

I have found a few references to it on this forum, and a few YouTube videos.

As far as I can see, those who have made it seem pleased with it.

How many people on here have made it?

Are you pleased with the result?

What are the difficulties I will encounter?

(Progress to date: I have purchased the plans and 3D printed a pattern to cast the pulley.)

Thread: How hot does the motor on your mill/lathe run?
27/08/2019 12:50:31

I spoke to Warco today, and they confirmed that the motors do indeed run hot.

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