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Member postings for Nick Hulme

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

Thread: Machine mart
12/01/2020 23:08:19

Browill Rewinds are in Sheffield and supply excellent industrial quality motors.

Edited By Nick Hulme on 12/01/2020 23:08:41

Thread: vice thread efficiency
12/01/2020 23:05:33

Your choice of friction modifier can make a difference.

Thread: 3mm drill hole too tight for 3mm bar
31/12/2019 16:29:21

You can sharpen one drill flute manually with a stone to give the tip slightly asymmetric geometry, this will then drill a slightly larger hole than a symmetrical grind.

Thread: Stevensons original collet blocks & Arc Euro 6" grinder
17/12/2019 22:31:13
Posted by Russ B on 17/12/2019 15:35:11:

Just my thoughts but you can't sensibly machine anything massive with an ER32 chuck and they do slip,

What torque are you tightening to?
I never had an ER collet slip after I looked up the correct tightening torques.

Thread: Tapping a nylon hole.
29/11/2019 21:42:27

I machine tap Nylon with spiral flute taps, the threads have enough resistance not to shake loose but are not difficult to tighten.

Thread: Holding screw-end end-mills/slot-drills
24/11/2019 13:42:24
Posted by Hillclimber on 18/11/2019 18:34:39:

Until now, I have held end-mill/ slot-drill cutters in ER25 collets. And am aware of the hazard of these being drawn out.

This is a hazard only observed by those not using correct assembly techniques and tightening torques for ER collets.
The tool and collet bore must be clean and dry.
The outer faces of the collet, the holder taper and the nut must be clean, they can be dry or very lightly lubricated.
The correct torque for the nut size and nut style must be applied, look it up, it's more than you think!

Thread: aluminium troubles
24/11/2019 13:27:50

Provide cutting and cutter data to save people guessing what you may or may not be doing.

Thread: Precision Tool Vice Type 2
24/11/2019 13:25:58
Posted by not done it yet on 20/11/2019 08:46:46:

IMO, the vise should be ‘idiot-proof’. If that means making it 1mm taller, to avoid this potential problem, then so be it.

It's an Industry Standard design, the solution is only to allow it's use by Industry Standard Non-Idiots.
After all, it's well known that if you make something Idiot Proof then God simply makes a Better Idiot! :D

Thread: It's Myford Jim, but not as we know it!
24/11/2019 13:20:25
Posted by Georgineer on 23/11/2019 11:36:14:

Have you told Myford about the problem?

I considered it but what are they going to do, start checking products which they have not bothered to check so far and scrap the rejects or sell them anyway and expect a certain level of returns and for the other users to put up with shoddy products with a "Genuine Myford" sticker on them?
My money is on the latter given the obvious lack of QC/QA which they evidently currently apply, their past behaviour means they don't get an even break or the benefit of the doubt from me.

23/11/2019 01:26:34

I bought a 30/12 Fine Feed Tumbler Gear bought from the new Myford Ltd and fitted it to a genuine Nottingham Myford Super 7 with genuine Nottingham Myford change gears and genuine Nottingham Myford idler gears.
I turned the gear manually before engaging drive and found half of it ran fine and half of it was "lumpy", the root between two of the teeth in the "lumpy" section of the 30 tooth gear on this product was 0.58mm shallower than average with the tooth either side causing the idlers to jam solid.
On measuring the teeth I found the tolerances were all over, needing it working this weekend I hand fettled it to run smoothly.
I find it a further disappointment that this part has no rear roller bearing or front brass bush as was the case with genuine Nottingham Myford parts, it should be advertised as a good basis for someone with reasonable bench work skills to fettle into a usable product, as delivered it would have damaged my idler gears if used.

Thread: machine dovetails.
10/11/2019 17:49:06

If there isn't space for a dovetail cutter then it may have been done on a horizontal mill, I'll let you imagine the setup but it's not rocket surgery

Thread: Tools for Super 7
07/11/2019 08:47:50
Posted by Howard Lewis on 05/11/2019 16:18:04:

A Super 7 is barely going to be fast or rigid enough to use carbide tips to their maximum. Wait for the howls!

I may have a jaundiced view of this opinion owing to my Super 7 being a Long Bed model and having a VFD and 1hp 3 phase motor, but using insert tooling I regularly take 10mm reduction cuts on 30mm stainless bar with blue chips flying.
If you need to save money, have short arms & long pockets or have plenty of time to play at a grinder and shimming tools coupled with insufficient work to keep you going until you drop off your log then inserted tooling may not be for you.
If you want to be able to rotate or swap a worn or chipped edge in seconds and carry on with your work then inserted tooling just might be for you, the variety of forms available means that most of what the naysayers trot out on this subject is woefully out of date.

Thread: DRO to vertical mill z axis
17/10/2019 22:25:43

DRO or Digital Scale?
I used digital scales for a while, they're useful but not a patch on a DRO.

Thread: Curve Cut Problem
17/10/2019 22:23:17

If you add what CAD/CAM/Controller you are using people with relevant experience will be able to comment.

Thread: At last - no more chattering when parting off!
09/10/2019 20:21:17
Posted by Mark Rand on 07/10/2019 20:34:02:

Just being picky here, but it seemed to me that there was still quite a lot of chatter in the 'tool'. It might have needed a more sturdy 'tool holder'.

There was a lot of chatter in the tool, but it's his video........
I'll get me coat! :D

Thread: Metrication of models
04/10/2019 17:31:44

It's predominantly a case of substituting alternate threads which will work (i.e. not having an over-size major OD which interferes with another aspect of the part) and using a calculator.
Anyone working in metric and unable to machine from an imperial print should find themselves a new gaming machine to play with as that's all they're good for.

Thread: cutter slippage using ER series collets
27/09/2019 23:47:06

Unlikely to slip if used correctly on a good quality tool shank, read up on what bits should be clean and oil-free when fitting the tool and use the correct torque.
Blaming the tools and all that :D

Thread: M8x1 left hand tap.
19/09/2019 09:29:31
Posted by Pete Savage on 18/09/2019 11:18:10:

he idea was to make phosphor bronze sacrificial anti backlash nuts to try and get the backlash and friction down to help with the fitting of CNC, so an investment in a tool likely to last a few sets sounds good.

If going the CNC route go straight to Ball Screws, suitably sized ones for your machine will not break the bank.

Thread: Myford Bull Wheel Indexing
17/09/2019 18:06:34

That's cute, neat and well executed.
Nice job!

Thread: Anyone know where I can get hold of 'Gauge Rods'
09/09/2019 21:47:55

I'd just make a mount for a digital gauge on the top slide, measure from a shoulder to a face or face a known length from the shoulder

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