Here is a list of all the postings Vic has made in our forums. Click on a thread name to jump to the thread.
|Thread: DIY Compression spring|
I had some custom springs made for me some years ago and had the opportunity to watch them being made. After winding and then grinding the ends flat they were heat treated and them tempered. I have no idea of the steel used though.
Much depends on what set you’ve bought. Some of these sets are aimed at hobbyists and seem to use non standard inserts so any commercial specifications may have little bearing. You may also be restricted to buying replacement inserts from the original vendor in whatever grade they deem suitable.
This catalogue gives a clear guide to what each different insert is used for. It also includes data on insert sizes and grades for cutting different materials etc.
Edited By Vic on 12/08/2021 12:01:07
|Thread: 16mm Indexable tool holders|
TNMG don’t seem to be any more expensive than most other inserts but you get six cutting tips at a useful angle.
My last couple of 16mm ones were cheap on the auction site and they work just fine. I wouldn’t have bothered with 16mm ones as I needed to trim them down a bit but I wanted to use TNMG’s. I needed to use a carbide mill so even the cheap tool holders seem to be made of tough steel.
Combining solar panels with this might be useful?
It seems there just isn’t enough investment in this type of thing at the moment. And letting energy companies get away with paying only a tiny fraction of of what they charge you when you’re putting energy back is scandalous.
|Thread: Knurling tool|
Cut knurling seems to produce a better result.
Edited By Vic on 07/08/2021 11:18:08
|Thread: EV Charging Hacks …|
I completely agree, we actually need constructive criticism. Not some of the silly made up objections we so often hear. I hasten to add that I’m not an EV owner although I hope to be able to get one when the price comes down to a more affordable level.
Did you even read the first headline or not understand the concept of Destination Charging?
|Thread: 80mm milling vice|
That’s ok if you’re happy with the stud size. For my machine those T nuts take a 12mm stud which is way over the top for what I do. I made my T nuts with M10 threads but also use M8 clamping elements as well.
Mine were made on the Lathe. When I needed to make some T nuts though I found some ordinary ones to temporarily hold the vice.
I made two press fit collars for the holes in my vice that are a snug fit in the T slots. It’s within a thou or two just fitting the vice on the table but I normally clock it as well as it’s pretty quick. The holes through the collars still allow me to use M10 studs.
|Thread: EV Charging Hacks …|
I can’t quite get the link between a government ban on the sales of New ICE Cars in 2030 and comments about military vehicles? I would have though the military would be keen to continue using Diesel, Petrol and Avgas?
This makes interesting reading. I knew 60% of motorists have their own drive. It’s a shame so many folks can’t understand the concept of destination charging.
|Thread: Tapping Drill sizes|
Thanks for the feedback folks. I can do a test run on some scrap so that’s probably the way to go.
I’ve got various charts out in the shed but normally just Google it if I’m indoors. The problem is which source to trust? I have a project coming up in which I’m going to be using fasteners I don’t normally use, M4.5 coarse. I did a quick Google and the size quoted was 3.75mm. Looking in the shed I found I had a couple of 3.7mm drill bits. I did another Google and found both 3.7mm and 3.8mm quoted as being the correct size. Is there a definitive source of information for tapping drills etc? I seem to remember there was a chart that had several sizes for each thread and quoted a percentage thread engagement? Anyone have a link?
|Thread: EV Charging Hacks …|
EV’s may or may not be a long term answer. From what I’ve read recently though I think they might. Given the number of peoples lives cut short by Diesel fumes though and the finite supplies of crude oil we need to get them off the roads as soon as possible.
Cost, range, lack of infrastructure etc were all problems for Petrol cars that took far longer to address than EV’s are likely to take but they still caught on.
I saw something about smart meter use in the USA a while back. You can get a discount from the energy supplier if you allow them to remotely turn off certain items during high usage periods. I knew there was a reason for the push for smart meters. Eventually everyone will have them and non essential devices may be turned off as needed by energy suppliers. EV’s of course have the potential not only to store energy for its own use but also to put it back into the grid if it’s needed. All fine if it works as intended and there is enough investment in energy production and supply. I would expect “teething” troubles though. I don’t expect many of us on here will be around to see it though so nothing to worry about unless you just like moaning about new technology.
|Thread: ACME taps and Dies|
I watched a video yesterday of someone cutting a female ACME thread in a brass part with a tap and it looked to need some force but doable. There seem to be some very long ACME taps out there which surely reduces the effort. Sadly they are also very expensive!
Revisiting an old thread (pun intended) the question popped into my mind for a different project. It seems there are at least three types of ACME thread taps available. What looks like a fairly ordinary tap apart from the thread form, is no doubt intended just to clean up existing threads due to the very short lead. I have seen two other types though. One, as suggested earlier is cut as two taps in one tool. The first part has a gradual taper and cuts what appears to be a conventional looking thread. After a short gap the tap then gradually cuts the noticeable ACME form. Another type is very long and clearly removes a very small amount of material as it gradually cuts a full ACME thread. So it seems it is possible, albeit at a very high price! I won’t post links but do a Google image search if you’re interested. I shall be single point cutting if the project goes ahead but out of interest I’d like to see one of these taps in action!
|Thread: is a belt sander any good for hss tooling|
My belt sander takes 150 x 1220 belts but I have a 50mm wide supplementary platen made from O1 steel that is easily fitted as required. I have both straight and notched tables to use both sizes of belt. Splitting down 150mm wide belts into three 50mm ones is straightforward. One thing I also did early on with my machine was to remove the soft graphite pad and replace it with a piece of 3mm thick steel. The graphite pad was too soft and deformed causing slightly rounded grinds in steel sometimes.
|Thread: Machining D2 Steel?|
I’m contemplating making an item that would be very much easier if I used ground steel stock. I did originally think of using O1 as it’s readily available and I’ve machined it before. Ideally though I’d prefer to use something more rust resistant and I noticed that D2 is available as annealed ground stock. I was just wondering how this stuff is for milling, drilling and threading?
Alternatively are there any other rust resistant steels commonly available as ground stock? TIA.
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